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Imported new MicroAPRS source version

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Mark Qvist 2014-12-19 01:19:07 +01:00
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(This project uses BertOS for some functionality. BertOS is licensed under GPLv2. Please see http://www.bertos.org for details. All files in the "bertos" directory originates from BertOS.)
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The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

379
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# AVR Sample makefile written by Eric B. Weddington, Jörg Wunsch, et al.
# Modified (bringing often-changed options to the top) by Elliot Williams
# make all = Make software and program
# make clean = Clean out built project files.
# make program = Download the hex file to the device, using avrdude. Please
# customize the avrdude settings below first!
# Microcontroller Type
#MCU = atmega1284p
#MCU = atmega644p
MCU = atmega328p
# Target file name (without extension).
TARGET = images/MicroAPRS
# Programming hardware: type avrdude -c ?
# to get a full listing.
AVRDUDE_PROGRAMMER = arduino
AVRDUDE_PORT = /dev/usb # not really needed for usb
#AVRDUDE_PORT = /dev/parport0 # linux
# AVRDUDE_PORT = lpt1 # windows
############# Don't need to change below here for most purposes (Elliot)
# Optimization level, can be [0, 1, 2, 3, s]. 0 turns off optimization.
# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
OPT = s
# Output format. (can be srec, ihex, binary)
FORMAT = ihex
# List C source files here. (C dependencies are automatically generated.)
#SRC = $(TARGET).c
SRC = main.c hardware/Serial.c hardware/AFSK.c util/CRC-CCIT.c protocol/AX25.c protocol/KISS.c protocol/SimpleSerial.c
# If there is more than one source file, append them above, or modify and
# uncomment the following:
#SRC += foo.c bar.c
# You can also wrap lines by appending a backslash to the end of the line:
#SRC += baz.c \
#xyzzy.c
# List Assembler source files here.
# Make them always end in a capital .S. Files ending in a lowercase .s
# will not be considered source files but generated files (assembler
# output from the compiler), and will be deleted upon "make clean"!
# Even though the DOS/Win* filesystem matches both .s and .S the same,
# it will preserve the spelling of the filenames, and gcc itself does
# care about how the name is spelled on its command-line.
ASRC =
# List any extra directories to look for include files here.
# Each directory must be seperated by a space.
EXTRAINCDIRS =
# Optional compiler flags.
# -g: generate debugging information (for GDB, or for COFF conversion)
# -O*: optimization level
# -f...: tuning, see gcc manual and avr-libc documentation
# -Wall...: warning level
# -Wa,...: tell GCC to pass this to the assembler.
# -ahlms: create assembler listing
CFLAGS = -g -O$(OPT) \
-funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums \
-Wall -Wstrict-prototypes \
-Wa,-adhlns=$(<:.c=.lst) \
$(patsubst %,-I%,$(EXTRAINCDIRS))
# Set a "language standard" compiler flag.
# Unremark just one line below to set the language standard to use.
# gnu99 = C99 + GNU extensions. See GCC manual for more information.
#CFLAGS += -std=c89
#CFLAGS += -std=gnu89
#CFLAGS += -std=c99
CFLAGS += -std=gnu99
# Optional assembler flags.
# -Wa,...: tell GCC to pass this to the assembler.
# -ahlms: create listing
# -gstabs: have the assembler create line number information; note that
# for use in COFF files, additional information about filenames
# and function names needs to be present in the assembler source
# files -- see avr-libc docs [FIXME: not yet described there]
ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
# Optional linker flags.
# -Wl,...: tell GCC to pass this to linker.
# -Map: create map file
# --cref: add cross reference to map file
LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
# Additional libraries
# Minimalistic printf version
#LDFLAGS += -Wl,-u,vfprintf -lprintf_min
# Floating point printf version (requires -lm below)
#LDFLAGS += -Wl,-u,vfprintf -lprintf_flt
# -lm = math library
LDFLAGS += -lm
# Programming support using avrdude. Settings and variables.
AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
# Uncomment the following if you want avrdude's erase cycle counter.
# Note that this counter needs to be initialized first using -Yn,
# see avrdude manual.
#AVRDUDE_ERASE += -y
# Uncomment the following if you do /not/ wish a verification to be
# performed after programming the device.
#AVRDUDE_FLAGS += -V
# Increase verbosity level. Please use this when submitting bug
# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
# to submit bug reports.
#AVRDUDE_FLAGS += -v -v
#Run while cable attached or don't
AVRDUDE_FLAGS += -E reset #keep chip disabled while cable attached
#AVRDUDE_FLAGS += -E noreset
#AVRDUDE_WRITE_FLASH = -U lfuse:w:0x04:m #run with 8 Mhz clock
#AVRDUDE_WRITE_FLASH = -U lfuse:w:0x21:m #run with 1 Mhz clock #default clock mode
#AVRDUDE_WRITE_FLASH = -U lfuse:w:0x01:m #run with 1 Mhz clock no start up time
# ---------------------------------------------------------------------------
# Define programs and commands.
SHELL = sh
CC = avr-gcc
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
SIZE = avr-size
# Programming support using avrdude.
AVRDUDE = avrdude
REMOVE = rm -f
COPY = cp
HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
ELFSIZE = $(SIZE) -C $(TARGET).elf
# Define Messages
# English
MSG_ERRORS_NONE = Firmware compiled successfully!
MSG_BEGIN = Starting build...
MSG_END = -------- Done --------
MSG_SIZE_BEFORE = Size before:
MSG_SIZE_AFTER = Size after:
MSG_COFF = Converting to AVR COFF:
MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
MSG_FLASH = Creating load file for Flash:
MSG_EEPROM = Creating load file for EEPROM:
MSG_EXTENDED_LISTING = Creating Extended Listing:
MSG_SYMBOL_TABLE = Creating Symbol Table:
MSG_LINKING = Linking:
MSG_COMPILING = Compiling:
MSG_ASSEMBLING = Assembling:
MSG_CLEANING = Cleaning project:
# Define all object files.
OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)
# Define all listing files.
LST = $(ASRC:.S=.lst) $(SRC:.c=.lst)
# Combine all necessary flags and optional flags.
# Add target processor to flags.
ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS)
ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
# Default target: make program!
#all: begin gccversion sizebefore $(TARGET).elf $(TARGET).hex $(TARGET).eep \
# $(TARGET).lss $(TARGET).sym sizeafter finished end
all: begin $(TARGET).elf $(TARGET).hex $(TARGET).eep \
$(TARGET).lss $(TARGET).sym cleanup sizeafter finished
# $(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
# Eye candy.
# AVR Studio 3.x does not check make's exit code but relies on
# the following magic strings to be generated by the compile job.
begin:
@echo
@echo $(MSG_BEGIN)
finished:
@echo $(MSG_ERRORS_NONE)
end:
@echo $(MSG_END)
@echo
# Display size of file.
sizebefore:
@if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); echo; fi
sizeafter:
@if [ -f $(TARGET).elf ]; then echo; $(ELFSIZE); echo; fi
# Display compiler version information.
gccversion :
@$(CC) --version
# Convert ELF to COFF for use in debugging / simulating in
# AVR Studio or VMLAB.
COFFCONVERT=$(OBJCOPY) --debugging \
--change-section-address .data-0x800000 \
--change-section-address .bss-0x800000 \
--change-section-address .noinit-0x800000 \
--change-section-address .eeprom-0x810000
coff: $(TARGET).elf
# @echo
# @echo $(MSG_COFF) $(TARGET).cof
@$(COFFCONVERT) -O coff-avr $< $(TARGET).cof
extcoff: $(TARGET).elf
# @echo
# @echo $(MSG_EXTENDED_COFF) $(TARGET).cof
@$(COFFCONVERT) -O coff-ext-avr $< $(TARGET).cof
# Program the device.
program: $(TARGET).hex $(TARGET).eep
@$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
# Create final output files (.hex, .eep) from ELF output file.
%.hex: %.elf
# @echo
# @echo $(MSG_FLASH) $@
@$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@
%.eep: %.elf
# @echo
# @echo $(MSG_EEPROM) $@
# @echo Not generating any EEPROM images
@-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section-lma .eeprom=0 -O $(FORMAT) $< $@
# Create extended listing file from ELF output file.
%.lss: %.elf
# @echo
# @echo $(MSG_EXTENDED_LISTING) $@
@$(OBJDUMP) -h -S $< > $@
# Create a symbol table from ELF output file.
%.sym: %.elf
# @echo
# @echo $(MSG_SYMBOL_TABLE) $@
@avr-nm -n $< > $@
# Link: create ELF output file from object files.
.SECONDARY : $(TARGET).elf
.PRECIOUS : $(OBJ)
%.elf: $(OBJ)
@echo $(MSG_LINKING) $@
@$(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS)
# Compile: create object files from C source files.
%.o : %.c
@echo $(MSG_COMPILING) $<
@$(CC) -c $(ALL_CFLAGS) $< -o $@
# Compile: create assembler files from C source files.
%.s : %.c
@$(CC) -S $(ALL_CFLAGS) $< -o $@
# Assemble: create object files from assembler source files.
%.o : %.S
@echo
@echo $(MSG_ASSEMBLING) $<
@$(CC) -c $(ALL_ASFLAGS) $< -o $@
# Target: clean project.
clean: clean_list finished
clean_list :
@echo
@echo $(MSG_CLEANING)
$(REMOVE) $(TARGET).hex
$(REMOVE) $(TARGET).eep
$(REMOVE) $(TARGET).obj
$(REMOVE) $(TARGET).cof
$(REMOVE) $(TARGET).elf
$(REMOVE) $(TARGET).map
$(REMOVE) $(TARGET).obj
$(REMOVE) $(TARGET).a90
$(REMOVE) $(TARGET).sym
$(REMOVE) $(TARGET).lnk
$(REMOVE) $(TARGET).lss
$(REMOVE) $(OBJ)
$(REMOVE) $(LST)
$(REMOVE) $(SRC:.c=.s)
$(REMOVE) $(SRC:.c=.d)
$(REMOVE) *~
cleanup:
@$(REMOVE) $(SRC:.c=.s)
@$(REMOVE) $(SRC:.c=.d)
@$(REMOVE) $(LST)
# Automatically generate C source code dependencies.
# (Code originally taken from the GNU make user manual and modified
# (See README.txt Credits).)
#
# Note that this will work with sh (bash) and sed that is shipped with WinAVR
# (see the SHELL variable defined above).
# This may not work with other shells or other seds.
#
%.d: %.c
@set -e; $(CC) -MM $(ALL_CFLAGS) $< \
| sed 's,\(.*\)\.o[ :]*,\1.o \1.d : ,g' > $@; \
[ -s $@ ] || rm -f $@
# Remove the '-' if you want to see the dependency files generated.
-include $(SRC:.c=.d)
# Listing of phony targets.
.PHONY : all begin finish end sizebefore sizeafter gccversion coff extcoff \
clean clean_list program

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README.md Normal file
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MicroAPRS
==========
MicroAPRS is an APRS firmware for MicroModem. It supports both normal KISS mode, and a simple serial protocol for easy communication with an Arduino, or other MCU.
You can buy a complete modem from [my shop](http://unsigned.io/shop), or you can build one yourself pretty easily. Take a look at the documentation in the [MicroModem](https://github.com/markqvist/MicroModem) repository for information and getting started guides!
## Some features
- Send and receive AX.25 APRS packets
- Full modulation and demodulation in software
- Easy configuration of callsign and path settings
- Flexibility in how received packets are output over serial connection
- Persistent configuration stored in EEPROM
- Shorthand functions for sending location updates and messages, so you don't need to manually create the packets
- Ability to send raw packets
- Support for settings APRS symbols
- Support for power/height/gain info in location updates
- Ability to automatically ACK messages adressed to the modem
- Can run with open squelch
- Supports KISS mode for use with programs on a host computer
## KISS mode
When the modem is running in KISS mode, there's really not much more to it than connecting the modem to a computer, opening whatever program you want to use with it, and off you go.
## Modem control - SimpleSerial
If you want to use the SimpleSerial protocol, here's how to control the APRS modem over a serial connection. The modem accepts a variety of commands for setting options and sending packets. Generally a command starts with one or more characters defining the command, and then whatever data is needed to set the options for that command. Here's a list of the currently available commands:
##Serial commands
Command | Description
--- | :---
__!\<data>__ | Send raw packet
__@\<cmt>__ | Send location update (cmt = optional comment)
__#\<msg>__ | Send APRS message
&nbsp; | &nbsp;
__c\<call>__ | Set your callsign
__d\<call>__ | Set destination callsign
__1\<call>__ | Set PATH1 callsign
__2\<call>__ | Set PATH2 callsign
&nbsp; | &nbsp;
__sc\<ssid>__ | Set your SSID
__sd\<ssid>__ | Set destination SSID
__s1\<ssid>__ | Set PATH1 SSID
__s2\<ssid>__ | Set PATH2 SSID
&nbsp; | &nbsp;
__lla\<LAT>__ | Set latitude (NMEA-format, eg 4903.50N)
__llo\<LON>__ | Set latitude (NMEA-format, eg 07201.75W)
__lp\<0-9>__ | Set TX power info
__lh\<0-9>__ | Set antenna height info
__lg\<0-9>__ | Set antenna gain info
__ld\<0-9>__ | Set antenna directivity info
__ls\<sym>__ | Select symbol
__lt\<s/a>__ | Select symbol table (standard/alternate)
&nbsp; | &nbsp;
__mc\<call>__ | Set message recipient callsign
__ms\<ssid>__ | Set message recipient SSID
__mr\<ssid>__ | Retry last message
__ma\<1/0>__ | Automatic message ACK on/off
&nbsp; |&nbsp;
__ps\<1/0>__ | Print SRC on/off
__pd\<1/0>__ | Print DST on/off
__pp\<1/0>__ | Print PATH on/off
__pm\<1/0>__ | Print DATA on/off
__pi\<1/0>__ | Print INFO on/off
__v\<1/0>__ | Verbose mode on/off
__V\<1/0>__ | Silent mode on/off
&nbsp; | &nbsp;
__w\<XXX>__ | Set preamble in ms
__W\<XXX>__ | Set TX tail in ms
&nbsp; | &nbsp;
__S__ | Save configuration
__L__ | Load configuration
__C__ | Clear configuration
__H__ | Print configuration
### Examples
__To set your callsign to XX1YYY-5, and then save the configuration, send these three commands:__
```
cXX1YYY
sc5
S
```
__To send an APRS message to ZZ5ABC-1 with the content "Hi there!", send these commands:__
```
mcZZ5ABC
ms1
#Hi there!
```
__To send a location update, with the comment "MicroAPRS", you can do something like this:__
```
lla5230.70N
llo01043.70E
@MicroAPRS
```
__To send an APRS message to ZZ5ABC-1 with the content "Hi there!", using a raw packet, send this command:__
```
!:ZZ5ABC-1 :Hi there!{01
```
__Here's an example of how to send a location update with power, height and gain information, using a raw packet:__
```
!=5230.70N/01043.70E-PHG2410MicroAPRS
```
### EEPROM Settings
When saving the configuration, it is written to EEPROM, so it will persist between poweroffs. If a configuration has been stored, it will automatically be loaded when the modem powers up. The configuration can be cleared by sending the "clear configuration" command (`C`).
### Serial Connection
To connect to the modem use __9600 baud, 8N1__ serial. By default, the firmware uses time-sensitive input, which means that it will buffer serial data as it comes in, and when it has received no data for a few milliseconds, it will start interpreting whatever it has received. This means you need to set your serial terminal program to not send data for every keystroke, but only on new-line, or pressing send or whatever. If you do not want this behaviour, you can compile the firmware with the DEBUG flag set, which will make the modem wait for a new-line character before interpreting the received data. I would generally advise against this though, since it means that you cannot have newline characters in whatever data you want to send!
![MicroModem](https://raw.githubusercontent.com/markqvist/MicroModem/master/Design/Images/1.jpg)
The project has been implemented in your normal C with makefile style, and uses AVR Libc. The firmware is compatible with Arduino-based products, although it was not written in the Arduino IDE.
Visit [my site](http://unsigned.io) for questions, comments and other details.

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#ifndef CONFIG_H
#define CONFIG_H
#endif

45
device.h Normal file
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#include "util/constants.h"
#ifndef DEVICE_CONFIGURATION
#define DEVICE_CONFIGURATION
// CPU settings
#define TARGET_CPU m328p
#define F_CPU 16000000
#define FREQUENCY_CORRECTION 0
// ADC settings
#define OPEN_SQUELCH false
#define ADC_REFERENCE REF_3V3
// OR
//#define ADC_REFERENCE REF_5V
// Sampling & timer setup
#define CONFIG_AFSK_DAC_SAMPLERATE 9600
// Serial protocol settings
#define SERIAL_PROTOCOL PROTOCOL_KISS
// OR
//#define SERIAL_PROTOCOL PROTOCOL_SIMPLE_SERIAL
// AX25 settings
#if SERIAL_PROTOCOL == PROTOCOL_SIMPLE_SERIAL
#define CUSTOM_FRAME_SIZE 330
#endif
// Serial settings
#define BAUD 9600
#define SERIAL_DEBUG false
#define TX_MAXWAIT 2UL
// Port settings
#if TARGET_CPU == m328p
#define DAC_PORT PORTD
#define DAC_DDR DDRD
#define LED_PORT PORTB
#define LED_DDR DDRB
#define ADC_PORT PORTC
#define ADC_DDR DDRC
#endif
#endif

2
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#!/bin/bash
avrdude -p $2 -c arduino -P /dev/tty$1 -b 115200 -F -U flash:w:images/OpenAPRS.hex

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#include <string.h>
#include "AFSK.h"
#include "util/time.h"
extern volatile ticks_t _clock;
extern unsigned long custom_preamble;
extern unsigned long custom_tail;
bool hw_afsk_dac_isr = false;
bool hw_5v_ref = false;
Afsk *AFSK_modem;
// Forward declerations
int afsk_getchar(void);
void afsk_putchar(char c);
void AFSK_hw_refDetect(void) {
// This is manual for now
#if ADC_REFERENCE == REF_5V
hw_5v_ref = true;
#else
hw_5v_ref = false;
#endif
}
void AFSK_hw_init(void) {
// Set up ADC
AFSK_hw_refDetect();
TCCR1A = 0;
TCCR1B = _BV(CS10) | _BV(WGM13) | _BV(WGM12);
ICR1 = (((CPU_FREQ+FREQUENCY_CORRECTION)) / 9600) - 1;
if (hw_5v_ref) {
ADMUX = _BV(REFS0) | 0;
} else {
ADMUX = 0;
}
ADC_DDR &= ~_BV(0);
ADC_PORT &= ~_BV(0);
DIDR0 |= _BV(0);
ADCSRB = _BV(ADTS2) |
_BV(ADTS1) |
_BV(ADTS0);
ADCSRA = _BV(ADEN) |
_BV(ADSC) |
_BV(ADATE)|
_BV(ADIE) |
_BV(ADPS2);
AFSK_DAC_INIT();
LED_TX_INIT();
LED_RX_INIT();
}
void AFSK_init(Afsk *afsk) {
// Allocate modem struct memory
memset(afsk, 0, sizeof(*afsk));
AFSK_modem = afsk;
// Set phase increment
afsk->phaseInc = MARK_INC;
// Initialise FIFO buffers
fifo_init(&afsk->delayFifo, (uint8_t *)afsk->delayBuf, sizeof(afsk->delayBuf));
fifo_init(&afsk->rxFifo, afsk->rxBuf, sizeof(afsk->rxBuf));
fifo_init(&afsk->txFifo, afsk->txBuf, sizeof(afsk->txBuf));
// Fill delay FIFO with zeroes
for (int i = 0; i<SAMPLESPERBIT / 2; i++) {
fifo_push(&afsk->delayFifo, 0);
}
AFSK_hw_init();
// Set up streams
FILE afsk_fd = FDEV_SETUP_STREAM(afsk_putchar, afsk_getchar, _FDEV_SETUP_RW);
afsk->fd = afsk_fd;
}
static void AFSK_txStart(Afsk *afsk) {
if (!afsk->sending) {
afsk->phaseInc = MARK_INC;
afsk->phaseAcc = 0;
afsk->bitstuffCount = 0;
afsk->sending = true;
LED_TX_ON();
afsk->preambleLength = DIV_ROUND(custom_preamble * BITRATE, 8000);
AFSK_DAC_IRQ_START();
}
ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
afsk->tailLength = DIV_ROUND(custom_tail * BITRATE, 8000);
}
}
void afsk_putchar(char c) {
AFSK_txStart(AFSK_modem);
while(fifo_isfull_locked(&AFSK_modem->txFifo)) { /* Wait */ }
fifo_push_locked(&AFSK_modem->txFifo, c);
}
int afsk_getchar(void) {
if (fifo_isempty_locked(&AFSK_modem->rxFifo)) {
return EOF;
} else {
return fifo_pop_locked(&AFSK_modem->rxFifo);
}
}
void AFSK_transmit(char *buffer, size_t size) {
fifo_flush(&AFSK_modem->txFifo);
int i = 0;
while (size--) {
afsk_putchar(buffer[i++]);
}
}
uint8_t AFSK_dac_isr(Afsk *afsk) {
if (afsk->sampleIndex == 0) {
if (afsk->txBit == 0) {
if (fifo_isempty(&afsk->txFifo) && afsk->tailLength == 0) {
AFSK_DAC_IRQ_STOP();
afsk->sending = false;
LED_TX_OFF();
return 0;
} else {
if (!afsk->bitStuff) afsk->bitstuffCount = 0;
afsk->bitStuff = true;
if (afsk->preambleLength == 0) {
if (fifo_isempty(&afsk->txFifo)) {
afsk->tailLength--;
afsk->currentOutputByte = HDLC_FLAG;
} else {
afsk->currentOutputByte = fifo_pop(&afsk->txFifo);
}
} else {
afsk->preambleLength--;
afsk->currentOutputByte = HDLC_FLAG;
}
if (afsk->currentOutputByte == AX25_ESC) {
if (fifo_isempty(&afsk->txFifo)) {
AFSK_DAC_IRQ_STOP();
afsk->sending = false;
LED_TX_OFF();
return 0;
} else {
afsk->currentOutputByte = fifo_pop(&afsk->txFifo);
}
} else if (afsk->currentOutputByte == HDLC_FLAG || afsk->currentOutputByte == HDLC_RESET) {
afsk->bitStuff = false;
}
}
afsk->txBit = 0x01;
}
if (afsk->bitStuff && afsk->bitstuffCount >= BIT_STUFF_LEN) {
afsk->bitstuffCount = 0;
afsk->phaseInc = SWITCH_TONE(afsk->phaseInc);
} else {
if (afsk->currentOutputByte & afsk->txBit) {
afsk->bitstuffCount++;
} else {
afsk->bitstuffCount = 0;
afsk->phaseInc = SWITCH_TONE(afsk->phaseInc);
}
afsk->txBit <<= 1;
}
afsk->sampleIndex = SAMPLESPERBIT;
}
afsk->phaseAcc += afsk->phaseInc;
afsk->phaseAcc %= SIN_LEN;
afsk->sampleIndex--;
return sinSample(afsk->phaseAcc);
}
static bool hdlcParse(Hdlc *hdlc, bool bit, FIFOBuffer *fifo) {
// Initialise a return value. We start with the
// assumption that all is going to end well :)
bool ret = true;
// Bitshift our byte of demodulated bits to
// the left by one bit, to make room for the
// next incoming bit
hdlc->demodulatedBits <<= 1;
// And then put the newest bit from the
// demodulator into the byte.
hdlc->demodulatedBits |= bit ? 1 : 0;
// Now we'll look at the last 8 received bits, and
// check if we have received a HDLC flag (01111110)
if (hdlc->demodulatedBits == HDLC_FLAG) {
// If we have, check that our output buffer is
// not full.
if (!fifo_isfull(fifo)) {
// If it isn't, we'll push the HDLC_FLAG into
// the buffer and indicate that we are now
// receiving data. For bling we also turn
// on the RX LED.
fifo_push(fifo, HDLC_FLAG);
hdlc->receiving = true;
#if OPEN_SQUELCH == false
LED_RX_ON();
#endif
} else {
// If the buffer is full, we have a problem
// and abort by setting the return value to
// false and stopping the here.
ret = false;
hdlc->receiving = false;
LED_RX_OFF();
}
// Everytime we receive a HDLC_FLAG, we reset the
// storage for our current incoming byte and bit
// position in that byte. This effectively
// synchronises our parsing to the start and end
// of the received bytes.
hdlc->currentByte = 0;
hdlc->bitIndex = 0;
return ret;
}
// Check if we have received a RESET flag (01111111)
// In this comparison we also detect when no transmission
// (or silence) is taking place, and the demodulator
// returns an endless stream of zeroes. Due to the NRZ
// coding, the actual bits send to this function will
// be an endless stream of ones, which this AND operation
// will also detect.
if ((hdlc->demodulatedBits & HDLC_RESET) == HDLC_RESET) {
// If we have, something probably went wrong at the
// transmitting end, and we abort the reception.
hdlc->receiving = false;
LED_RX_OFF();
return ret;
}
// If we have not yet seen a HDLC_FLAG indicating that
// a transmission is actually taking place, don't bother
// with anything.
if (!hdlc->receiving)
return ret;
// First check if what we are seeing is a stuffed bit.
// Since the different HDLC control characters like
// HDLC_FLAG, HDLC_RESET and such could also occur in
// a normal data stream, we employ a method known as
// "bit stuffing". All control characters have more than
// 5 ones in a row, so if the transmitting party detects
// this sequence in the _data_ to be transmitted, it inserts
// a zero to avoid the receiving party interpreting it as
// a control character. Therefore, if we detect such a
// "stuffed bit", we simply ignore it and wait for the
// next bit to come in.
//
// We do the detection by applying an AND bit-mask to the
// stream of demodulated bits. This mask is 00111111 (0x3f)
// if the result of the operation is 00111110 (0x3e), we
// have detected a stuffed bit.
if ((hdlc->demodulatedBits & 0x3f) == 0x3e)
return ret;
// If we have an actual 1 bit, push this to the current byte
// If it's a zero, we don't need to do anything, since the
// bit is initialized to zero when we bitshifted earlier.
if (hdlc->demodulatedBits & 0x01)
hdlc->currentByte |= 0x80;
// Increment the bitIndex and check if we have a complete byte
if (++hdlc->bitIndex >= 8) {
// If we have a HDLC control character, put a AX.25 escape
// in the received data. We know we need to do this,
// because at this point we must have already seen a HDLC
// flag, meaning that this control character is the result
// of a bitstuffed byte that is equal to said control
// character, but is actually part of the data stream.
// By inserting the escape character, we tell the protocol
// layer that this is not an actual control character, but
// data.
if ((hdlc->currentByte == HDLC_FLAG ||
hdlc->currentByte == HDLC_RESET ||
hdlc->currentByte == AX25_ESC)) {
// We also need to check that our received data buffer
// is not full before putting more data in
if (!fifo_isfull(fifo)) {
fifo_push(fifo, AX25_ESC);
} else {
// If it is, abort and return false
hdlc->receiving = false;
LED_RX_OFF();
ret = false;
}
}
// Push the actual byte to the received data FIFO,
// if it isn't full.
if (!fifo_isfull(fifo)) {
fifo_push(fifo, hdlc->currentByte);
} else {
// If it is, well, you know by now!
hdlc->receiving = false;
LED_RX_OFF();
ret = false;
}
// Wipe received byte and reset bit index to 0
hdlc->currentByte = 0;
hdlc->bitIndex = 0;
} else {
// We don't have a full byte yet, bitshift the byte
// to make room for the next bit
hdlc->currentByte >>= 1;
}
//digitalWrite(13, LOW);
return ret;
}
void AFSK_adc_isr(Afsk *afsk, int8_t currentSample) {
// To determine the received frequency, and thereby
// the bit of the sample, we multiply the sample by
// a sample delayed by (samples per bit / 2).
// We then lowpass-filter the samples with a
// Chebyshev filter. The lowpass filtering serves
// to "smooth out" the variations in the samples.
afsk->iirX[0] = afsk->iirX[1];
afsk->iirX[1] = ((int8_t)fifo_pop(&afsk->delayFifo) * currentSample) >> 2;
afsk->iirY[0] = afsk->iirY[1];
afsk->iirY[1] = afsk->iirX[0] + afsk->iirX[1] + (afsk->iirY[0] >> 1); // Chebyshev filter
// We put the sampled bit in a delay-line:
// First we bitshift everything 1 left
afsk->sampledBits <<= 1;
// And then add the sampled bit to our delay line
afsk->sampledBits |= (afsk->iirY[1] > 0) ? 1 : 0;
// Put the current raw sample in the delay FIFO
fifo_push(&afsk->delayFifo, currentSample);
// We need to check whether there is a signal transition.
// If there is, we can recalibrate the phase of our
// sampler to stay in sync with the transmitter. A bit of
// explanation is required to understand how this works.
// Since we have PHASE_MAX/PHASE_BITS = 8 samples per bit,
// we employ a phase counter (currentPhase), that increments
// by PHASE_BITS everytime a sample is captured. When this
// counter reaches PHASE_MAX, it wraps around by modulus
// PHASE_MAX. We then look at the last three samples we
// captured and determine if the bit was a one or a zero.
//
// This gives us a "window" looking into the stream of
// samples coming from the ADC. Sort of like this:
//
// Past Future
// 0000000011111111000000001111111100000000
// |________|
// ||
// Window
//
// Every time we detect a signal transition, we adjust
// where this window is positioned little. How much we
// adjust it is defined by PHASE_INC. If our current phase
// phase counter value is less than half of PHASE_MAX (ie,
// the window size) when a signal transition is detected,
// add PHASE_INC to our phase counter, effectively moving
// the window a little bit backward (to the left in the
// illustration), inversely, if the phase counter is greater
// than half of PHASE_MAX, we move it forward a little.
// This way, our "window" is constantly seeking to position
// it's center at the bit transitions. Thus, we synchronise
// our timing to the transmitter, even if it's timing is
// a little off compared to our own.
if (SIGNAL_TRANSITIONED(afsk->sampledBits)) {
if (afsk->currentPhase < PHASE_THRESHOLD) {
afsk->currentPhase += PHASE_INC;
} else {
afsk->currentPhase -= PHASE_INC;
}
}
// We increment our phase counter
afsk->currentPhase += PHASE_BITS;
// Check if we have reached the end of
// our sampling window.
if (afsk->currentPhase >= PHASE_MAX) {
// If we have, wrap around our phase
// counter by modulus
afsk->currentPhase %= PHASE_MAX;
// Bitshift to make room for the next
// bit in our stream of demodulated bits
afsk->actualBits <<= 1;
// We determine the actual bit value by reading
// the last 3 sampled bits. If there is three or
// more 1's, we will assume that the transmitter
// sent us a one, otherwise we assume a zero
uint8_t bits = afsk->sampledBits & 0x07;
if (bits == 0x07 || // 111
bits == 0x06 || // 110
bits == 0x05 || // 101
bits == 0x03 // 011
) {
afsk->actualBits |= 1;
}
//// Alternative using five bits ////////////////
// uint8_t bits = afsk->sampledBits & 0x0f;
// uint8_t c = 0;
// c += bits & BV(1);
// c += bits & BV(2);
// c += bits & BV(3);
// c += bits & BV(4);
// c += bits & BV(5);
// if (c >= 3) afsk->actualBits |= 1;
/////////////////////////////////////////////////
// Now we can pass the actual bit to the HDLC parser.
// We are using NRZ coding, so if 2 consecutive bits
// have the same value, we have a 1, otherwise a 0.
// We use the TRANSITION_FOUND function to determine this.
//
// This is smart in combination with bit stuffing,
// since it ensures a transmitter will never send more
// than five consecutive 1's. When sending consecutive
// ones, the signal stays at the same level, and if
// this happens for longer periods of time, we would
// not be able to synchronize our phase to the transmitter
// and would start experiencing "bit slip".
//
// By combining bit-stuffing with NRZ coding, we ensure
// that the signal will regularly make transitions
// that we can use to synchronize our phase.
//
// We also check the return of the Link Control parser
// to check if an error occured.
if (!hdlcParse(&afsk->hdlc, !TRANSITION_FOUND(afsk->actualBits), &afsk->rxFifo)) {
afsk->status |= 1;
if (fifo_isfull(&afsk->rxFifo)) {
fifo_flush(&afsk->rxFifo);
afsk->status = 0;
}
}
}
}
ISR(ADC_vect) {
TIFR1 = _BV(ICF1);
AFSK_adc_isr(AFSK_modem, ((int16_t)((ADC) >> 2) - 128));
if (hw_afsk_dac_isr) {
DAC_PORT = (AFSK_dac_isr(AFSK_modem) & 0xF0) | _BV(3);
} else {
DAC_PORT = 128;
}
++_clock;
}

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#ifndef AFSK_H
#define AFSK_H
#include "device.h"
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <avr/pgmspace.h>
#include "util/FIFO.h"
#include "util/time.h"
#include "protocol/HDLC.h"
#define SIN_LEN 512
static const uint8_t sin_table[] PROGMEM =
{
128, 129, 131, 132, 134, 135, 137, 138, 140, 142, 143, 145, 146, 148, 149, 151,
152, 154, 155, 157, 158, 160, 162, 163, 165, 166, 167, 169, 170, 172, 173, 175,
176, 178, 179, 181, 182, 183, 185, 186, 188, 189, 190, 192, 193, 194, 196, 197,
198, 200, 201, 202, 203, 205, 206, 207, 208, 210, 211, 212, 213, 214, 215, 217,
218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233,
234, 234, 235, 236, 237, 238, 238, 239, 240, 241, 241, 242, 243, 243, 244, 245,
245, 246, 246, 247, 248, 248, 249, 249, 250, 250, 250, 251, 251, 252, 252, 252,
253, 253, 253, 253, 254, 254, 254, 254, 254, 255, 255, 255, 255, 255, 255, 255,
};
inline static uint8_t sinSample(uint16_t i) {
uint16_t newI = i % (SIN_LEN/2);
newI = (newI >= (SIN_LEN/4)) ? (SIN_LEN/2 - newI -1) : newI;
uint8_t sine = pgm_read_byte(&sin_table[newI]);
return (i >= (SIN_LEN/2)) ? (255 - sine) : sine;
}
#define SWITCH_TONE(inc) (((inc) == MARK_INC) ? SPACE_INC : MARK_INC)
#define BITS_DIFFER(bits1, bits2) (((bits1)^(bits2)) & 0x01)
#define DUAL_XOR(bits1, bits2) ((((bits1)^(bits2)) & 0x03) == 0x03)
#define SIGNAL_TRANSITIONED(bits) DUAL_XOR((bits), (bits) >> 2)
#define TRANSITION_FOUND(bits) BITS_DIFFER((bits), (bits) >> 1)
#define CPU_FREQ F_CPU
#define CONFIG_AFSK_RX_BUFLEN 64
#define CONFIG_AFSK_TX_BUFLEN 64
#define CONFIG_AFSK_RXTIMEOUT 0
#define CONFIG_AFSK_PREAMBLE_LEN 150UL
#define CONFIG_AFSK_TRAILER_LEN 50UL
#define SAMPLERATE 9600
#define BITRATE 1200
#define SAMPLESPERBIT (SAMPLERATE / BITRATE)
#define BIT_STUFF_LEN 5
#define MARK_FREQ 1200
#define SPACE_FREQ 2200
#define PHASE_BITS 8 // How much to increment phase counter each sample
#define PHASE_INC 1 // Nudge by an eigth of a sample each adjustment
#define PHASE_MAX (SAMPLESPERBIT * PHASE_BITS) // Resolution of our phase counter = 64
#define PHASE_THRESHOLD (PHASE_MAX / 2) // Target transition point of our phase window
typedef struct Hdlc
{
uint8_t demodulatedBits;
uint8_t bitIndex;
uint8_t currentByte;
bool receiving;
} Hdlc;
typedef struct Afsk
{
// Stream access to modem
FILE fd;
// General values
Hdlc hdlc; // We need a link control structure
uint16_t preambleLength; // Length of sync preamble
uint16_t tailLength; // Length of transmission tail
// Modulation values
uint8_t sampleIndex; // Current sample index for outgoing bit
uint8_t currentOutputByte; // Current byte to be modulated
uint8_t txBit; // Mask of current modulated bit
bool bitStuff; // Whether bitstuffing is allowed
uint8_t bitstuffCount; // Counter for bit-stuffing
uint16_t phaseAcc; // Phase accumulator
uint16_t phaseInc; // Phase increment per sample
FIFOBuffer txFifo; // FIFO for transmit data
uint8_t txBuf[CONFIG_AFSK_TX_BUFLEN]; // Actial data storage for said FIFO
volatile bool sending; // Set when modem is sending
// Demodulation values
FIFOBuffer delayFifo; // Delayed FIFO for frequency discrimination
int8_t delayBuf[SAMPLESPERBIT / 2 + 1]; // Actual data storage for said FIFO
FIFOBuffer rxFifo; // FIFO for received data
uint8_t rxBuf[CONFIG_AFSK_RX_BUFLEN]; // Actual data storage for said FIFO
int16_t iirX[2]; // IIR Filter X cells
int16_t iirY[2]; // IIR Filter Y cells
uint8_t sampledBits; // Bits sampled by the demodulator (at ADC speed)
int8_t currentPhase; // Current phase of the demodulator
uint8_t actualBits; // Actual found bits at correct bitrate
volatile int status; // Status of the modem, 0 means OK
} Afsk;
#define DIV_ROUND(dividend, divisor) (((dividend) + (divisor) / 2) / (divisor))
#define MARK_INC (uint16_t)(DIV_ROUND(SIN_LEN * (uint32_t)MARK_FREQ, CONFIG_AFSK_DAC_SAMPLERATE))
#define SPACE_INC (uint16_t)(DIV_ROUND(SIN_LEN * (uint32_t)SPACE_FREQ, CONFIG_AFSK_DAC_SAMPLERATE))
#define AFSK_DAC_IRQ_START() do { extern bool hw_afsk_dac_isr; hw_afsk_dac_isr = true; } while (0)
#define AFSK_DAC_IRQ_STOP() do { extern bool hw_afsk_dac_isr; hw_afsk_dac_isr = false; } while (0)
#define AFSK_DAC_INIT() do { DAC_DDR |= 0xF8; } while (0)
// Here's some macros for controlling the RX/TX LEDs
// THE _INIT() functions writes to the DDRB register
// to configure the pins as output pins, and the _ON()
// and _OFF() functions writes to the PORT registers
// to turn the pins on or off.
#define LED_TX_INIT() do { LED_DDR |= _BV(1); } while (0)
#define LED_TX_ON() do { LED_PORT |= _BV(1); } while (0)
#define LED_TX_OFF() do { LED_PORT &= ~_BV(1); } while (0)
#define LED_RX_INIT() do { LED_DDR |= _BV(2); } while (0)
#define LED_RX_ON() do { LED_PORT |= _BV(2); } while (0)
#define LED_RX_OFF() do { LED_PORT &= ~_BV(2); } while (0)
void AFSK_init(Afsk *afsk);
void AFSK_transmit(char *buffer, size_t size);
void AFSK_poll(Afsk *afsk);
#endif

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#include "Serial.h"
#include <util/setbaud.h>
#include <stdio.h>
#include <string.h>
void serial_init(Serial *serial) {
memset(serial, 0, sizeof(*serial));
UBRR0H = UBRRH_VALUE;
UBRR0L = UBRRL_VALUE;
#if USE_2X
UCSR0A |= _BV(U2X0);
#else
UCSR0A &= ~(_BV(U2X0));
#endif
// Set to 8-bit data, enable RX and TX
UCSR0C = _BV(UCSZ01) | _BV(UCSZ00);
UCSR0B = _BV(RXEN0) | _BV(TXEN0);
FILE uart0_fd = FDEV_SETUP_STREAM(uart0_putchar, uart0_getchar, _FDEV_SETUP_RW);
serial->uart0 = uart0_fd;
}
bool serial_available(uint8_t index) {
if (index == 0) {
if (UCSR0A & _BV(RXC0)) return true;
}
return false;
}
void uart0_putchar(char c) {
loop_until_bit_is_set(UCSR0A, UDRE0);
UDR0 = c;
}
char uart0_getchar(void) {
loop_until_bit_is_set(UCSR0A, RXC0);
return UDR0;
}
char uart0_getchar_nowait(void) {
if (!(UCSR0A & _BV(RXC0))) return EOF;
return UDR0;
}

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#ifndef SERIAL_H
#define SERIAL_H
#include "device.h"
#include <stdio.h>
#include <stdbool.h>
#include <avr/io.h>
typedef struct Serial {
FILE uart0;
} Serial;
void serial_init(Serial *serial);
bool serial_available(uint8_t index);
void uart0_putchar(char c);
char uart0_getchar(void);
char uart0_getchar_nowait(void);
#endif

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#include <stdbool.h>
#include <avr/io.h>
#include "device.h"
#include "util/FIFO.h"
#include "util/time.h"
#include "hardware/AFSK.h"
#include "hardware/Serial.h"
#include "protocol/AX25.h"
#if SERIAL_PROTOCOL == PROTOCOL_KISS
#include "protocol/KISS.h"
#endif
#if SERIAL_PROTOCOL == PROTOCOL_SIMPLE_SERIAL
#include "protocol/SimpleSerial.h"
#endif
Serial serial;
Afsk modem;
AX25Ctx AX25;
#if SERIAL_PROTOCOL == PROTOCOL_KISS
static void ax25_callback(struct AX25Ctx *ctx) {
kiss_messageCallback(ctx);
}
#endif
#if SERIAL_PROTOCOL == PROTOCOL_SIMPLE_SERIAL
static uint8_t serialBuffer[AX25_MAX_FRAME_LEN+1];
static int sbyte;
static size_t serialLen = 0;
static bool sertx = false;
static void ax25_callback(struct AX25Msg *msg) {
ss_messageCallback(msg);
}
#endif
void init(void) {
sei();
AFSK_init(&modem);
ax25_init(&AX25, &modem.fd, ax25_callback);
serial_init(&serial);
stdout = &serial.uart0;
stdin = &serial.uart0;
#if SERIAL_PROTOCOL == PROTOCOL_KISS
kiss_init(&AX25, &modem, &serial);
#endif
#if SERIAL_PROTOCOL == PROTOCOL_SIMPLE_SERIAL
ss_init(&AX25);
#endif
}
int main (void) {
init();
#if SERIAL_PROTOCOL == PROTOCOL_KISS
while (true) {
ax25_poll(&AX25);
if (serial_available(0)) {
char sbyte = uart0_getchar_nowait();
kiss_serialCallback(sbyte);
}
}
#endif
#if SERIAL_PROTOCOL == PROTOCOL_SIMPLE_SERIAL
ticks_t start = timer_clock();
while (1) {
ax25_poll(&AX25);
if (!sertx && serial_available(0)) {
sbyte = uart0_getchar_nowait();
#if SERIAL_DEBUG
if ((serialLen < AX25_MAX_FRAME_LEN) && (sbyte != 10)) {
serialBuffer[serialLen] = sbyte;
serialLen++;
} else {
sertx = true;
}
#else
if (serialLen < AX25_MAX_FRAME_LEN-1) {
serialBuffer[serialLen] = sbyte;
serialLen++;
} else {
serialBuffer[serialLen] = sbyte;
serialLen++;
sertx = true;
}
start = timer_clock();
#endif
} else {
if (!SERIAL_DEBUG && serialLen > 0 && timer_clock() - start > ms_to_ticks(TX_MAXWAIT)) {
sertx = true;
}
}
if (sertx) {
ss_serialCallback(serialBuffer, serialLen, &AX25);
sertx = false;
serialLen = 0;
}
}
#endif
return(0);
}

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:10165000089590958095709561957F4F8F4F9F4F1E
:061660000895F894FFCF8D
:101666003FC80000003200000096000000FE0100A6
:02167600000072
:00000001FF

1250
precompiled/microaprs-5v-ss-latest.hex Normal file
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163
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// Based on work by Francesco Sacchi
#include <string.h>
#include <ctype.h>
#include "AX25.h"
#include "protocol/HDLC.h"
#include "util/CRC-CCIT.h"
#include "../hardware/AFSK.h"
#define countof(a) sizeof(a)/sizeof(a[0])
#define MIN(a,b) ({ typeof(a) _a = (a); typeof(b) _b = (b); ((typeof(_a))((_a < _b) ? _a : _b)); })
#define DECODE_CALL(buf, addr) for (unsigned i = 0; i < sizeof((addr)); i++) { char c = (*(buf)++ >> 1); (addr)[i] = (c == ' ') ? '\x0' : c; }
#define AX25_SET_REPEATED(msg, idx, val) do { if (val) { (msg)->rpt_flags |= _BV(idx); } else { (msg)->rpt_flags &= ~_BV(idx) ; } } while(0)
void ax25_init(AX25Ctx *ctx, FILE *channel, ax25_callback_t hook) {
memset(ctx, 0, sizeof(*ctx));
ctx->ch = channel;
ctx->hook = hook;
ctx->crc_in = ctx->crc_out = CRC_CCIT_INIT_VAL;
}
static void ax25_decode(AX25Ctx *ctx) {
#if SERIAL_PROTOCOL == PROTOCOL_KISS
if (ctx->hook) ctx->hook(ctx);
#endif
#if SERIAL_PROTOCOL == PROTOCOL_SIMPLE_SERIAL
AX25Msg msg;
uint8_t *buf = ctx->buf;
DECODE_CALL(buf, msg.dst.call);
msg.dst.ssid = (*buf++ >> 1) & 0x0F;
DECODE_CALL(buf, msg.src.call);
msg.src.ssid = (*buf >> 1) & 0x0F;
for (msg.rpt_count = 0; !(*buf++ & 0x01) && (msg.rpt_count < countof(msg.rpt_list)); msg.rpt_count++) {
DECODE_CALL(buf, msg.rpt_list[msg.rpt_count].call);
msg.rpt_list[msg.rpt_count].ssid = (*buf >> 1) & 0x0F;
AX25_SET_REPEATED(&msg, msg.rpt_count, (*buf & 0x80));
}
msg.ctrl = *buf++;
if (msg.ctrl != AX25_CTRL_UI) { return; }
msg.pid = *buf++;
if (msg.pid != AX25_PID_NOLAYER3) { return; }
msg.len = ctx->frame_len - 2 - (buf - ctx->buf);
msg.info = buf;
if (ctx->hook) ctx->hook(&msg);
#endif
}
void ax25_poll(AX25Ctx *ctx) {
int c;
while ((c = fgetc(ctx->ch)) != EOF) {
if (!ctx->escape && c == HDLC_FLAG) {
if (ctx->frame_len >= AX25_MIN_FRAME_LEN) {
if (ctx->crc_in == AX25_CRC_CORRECT) {
#if OPEN_SQUELCH == true
LED_RX_ON();
#endif
ax25_decode(ctx);
}
}
ctx->sync = true;
ctx->crc_in = CRC_CCIT_INIT_VAL;
ctx->frame_len = 0;
continue;
}
if (!ctx->escape && c == HDLC_RESET) {
ctx->sync = false;
continue;
}
if (!ctx->escape && c == AX25_ESC) {
ctx->escape = true;
continue;
}
if (ctx->sync) {
if (ctx->frame_len < AX25_MAX_FRAME_LEN) {
ctx->buf[ctx->frame_len++] = c;
ctx->crc_in = update_crc_ccit(c, ctx->crc_in);
} else {
ctx->sync = false;
}
}
ctx->escape = false;
}
}
static void ax25_putchar(AX25Ctx *ctx, uint8_t c)
{
if (c == HDLC_FLAG || c == HDLC_RESET || c == AX25_ESC) fputc(AX25_ESC, ctx->ch);
ctx->crc_out = update_crc_ccit(c, ctx->crc_out);
fputc(c, ctx->ch);
}
void ax25_sendRaw(AX25Ctx *ctx, void *_buf, size_t len) {
ctx->crc_out = CRC_CCIT_INIT_VAL;
fputc(HDLC_FLAG, ctx->ch);
const uint8_t *buf = (const uint8_t *)_buf;
while (len--) ax25_putchar(ctx, *buf++);
uint8_t crcl = (ctx->crc_out & 0xff) ^ 0xff;
uint8_t crch = (ctx->crc_out >> 8) ^ 0xff;
ax25_putchar(ctx, crcl);
ax25_putchar(ctx, crch);
fputc(HDLC_FLAG, ctx->ch);
}
#if SERIAL_PROTOCOL == PROTOCOL_SIMPLE_SERIAL
static void ax25_sendCall(AX25Ctx *ctx, const AX25Call *addr, bool last){
unsigned len = MIN(sizeof(addr->call), strlen(addr->call));
for (unsigned i = 0; i < len; i++) {
uint8_t c = addr->call[i];
c = toupper(c);
ax25_putchar(ctx, c << 1);
}
if (len < sizeof(addr->call)) {
for (unsigned i = 0; i < sizeof(addr->call) - len; i++) {
ax25_putchar(ctx, ' ' << 1);
}
}
uint8_t ssid = 0x60 | (addr->ssid << 1) | (last ? 0x01 : 0);
ax25_putchar(ctx, ssid);
}
void ax25_sendVia(AX25Ctx *ctx, const AX25Call *path, size_t path_len, const void *_buf, size_t len) {
const uint8_t *buf = (const uint8_t *)_buf;
ctx->crc_out = CRC_CCIT_INIT_VAL;
fputc(HDLC_FLAG, ctx->ch);
for (size_t i = 0; i < path_len; i++) {
ax25_sendCall(ctx, &path[i], (i == path_len - 1));
}
ax25_putchar(ctx, AX25_CTRL_UI);
ax25_putchar(ctx, AX25_PID_NOLAYER3);
while (len--) {
ax25_putchar(ctx, *buf++);
}
uint8_t crcl = (ctx->crc_out & 0xff) ^ 0xff;
uint8_t crch = (ctx->crc_out >> 8) ^ 0xff;
ax25_putchar(ctx, crcl);
ax25_putchar(ctx, crch);
fputc(HDLC_FLAG, ctx->ch);
}
#endif

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#ifndef PROTOCOL_AX25_H
#define PROTOCOL_AX25_H
#include <stdio.h>
#include <stdbool.h>
#include "device.h"
#define AX25_MIN_FRAME_LEN 18
#ifndef CUSTOM_FRAME_SIZE
#define AX25_MAX_FRAME_LEN 620
#else
#define AX25_MAX_FRAME_LEN CUSTOM_FRAME_SIZE
#endif
#define AX25_CRC_CORRECT 0xF0B8
#define AX25_CTRL_UI 0x03
#define AX25_PID_NOLAYER3 0xF0
struct AX25Ctx; // Forward declarations
struct AX25Msg;
#if SERIAL_PROTOCOL == PROTOCOL_KISS
typedef void (*ax25_callback_t)(struct AX25Ctx *ctx);
#endif
#if SERIAL_PROTOCOL == PROTOCOL_SIMPLE_SERIAL
typedef void (*ax25_callback_t)(struct AX25Msg *msg);
#endif
typedef struct AX25Ctx {
uint8_t buf[AX25_MAX_FRAME_LEN];
FILE *ch;
size_t frame_len;
uint16_t crc_in;
uint16_t crc_out;
ax25_callback_t hook;
bool sync;
bool escape;
} AX25Ctx;
#if SERIAL_PROTOCOL == PROTOCOL_SIMPLE_SERIAL
#define AX25_CALL(str, id) {.call = (str), .ssid = (id) }
#define AX25_MAX_RPT 8
#define AX25_REPEATED(msg, n) ((msg)->rpt_flags & BV(n))
typedef struct AX25Call {
char call[6];
uint8_t ssid;
} AX25Call;
typedef struct AX25Msg {
AX25Call src;
AX25Call dst;
AX25Call rpt_list[AX25_MAX_RPT];
uint8_t rpt_count;
uint8_t rpt_flags;
uint16_t ctrl;
uint8_t pid;
const uint8_t *info;
size_t len;
} AX25Msg;
void ax25_sendVia(AX25Ctx *ctx, const AX25Call *path, size_t path_len, const void *_buf, size_t len);
#define ax25_send(ctx, dst, src, buf, len) ax25_sendVia(ctx, ({static AX25Call __path[]={dst, src}; __path;}), 2, buf, len)
#endif
void ax25_poll(AX25Ctx *ctx);
void ax25_sendRaw(AX25Ctx *ctx, void *_buf, size_t len);
void ax25_init(AX25Ctx *ctx, FILE *channel, ax25_callback_t hook);
#endif

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#ifndef PROTOCOL_HDLC_H
#define PROTOCOL_HDLC_H
#define HDLC_FLAG 0x7E
#define HDLC_RESET 0x7F
#define AX25_ESC 0x1B
#endif

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#include <stdlib.h>
#include <string.h>
#include "device.h"
#include "KISS.h"
static uint8_t serialBuffer[AX25_MAX_FRAME_LEN]; // Buffer for holding incoming serial data
AX25Ctx *ax25ctx;
Afsk *channel;
Serial *serial;
size_t frame_len;
bool IN_FRAME;
bool ESCAPE;
uint8_t command = CMD_UNKNOWN;
unsigned long custom_preamble = CONFIG_AFSK_PREAMBLE_LEN;
unsigned long custom_tail = CONFIG_AFSK_TRAILER_LEN;
unsigned long slotTime = 200;
uint8_t p = 63;
void kiss_init(AX25Ctx *ax25, Afsk *afsk, Serial *ser) {
ax25ctx = ax25;
serial = ser;
channel = afsk;
}
void kiss_messageCallback(AX25Ctx *ctx) {
fputc(FEND, &serial->uart0);
fputc(0x00, &serial->uart0);
for (unsigned i = 0; i < ctx->frame_len; i++) {
uint8_t b = ctx->buf[i];
if (b == FEND) {
fputc(FESC, &serial->uart0);
fputc(TFEND, &serial->uart0);
} else if (b == FESC) {
fputc(FESC, &serial->uart0);
fputc(TFESC, &serial->uart0);
} else {
fputc(b, &serial->uart0);
}
}
fputc(FEND, &serial->uart0);
}
void kiss_csma(AX25Ctx *ctx, uint8_t *buf, size_t len) {
bool sent = false;
while (!sent) {
//puts("Waiting in CSMA");
if(!channel->hdlc.receiving) {
uint8_t tp = rand() & 0xFF;
if (tp < p) {
ax25_sendRaw(ctx, buf, len);
sent = true;
} else {
ticks_t start = timer_clock();
long slot_ticks = ms_to_ticks(slotTime);
while (timer_clock() - start < slot_ticks) {
cpu_relax();
}
}
} else {
while (!sent && channel->hdlc.receiving) {
// Continously poll the modem for data
// while waiting, so we don't overrun
// receive buffers
ax25_poll(ax25ctx);
if (channel->status != 0) {
// If an overflow or other error
// occurs, we'll back off and drop
// this packet silently.
channel->status = 0;
sent = true;
}
}
}
}
}
void kiss_serialCallback(uint8_t sbyte) {
if (IN_FRAME && sbyte == FEND && command == CMD_DATA) {
IN_FRAME = false;
kiss_csma(ax25ctx, serialBuffer, frame_len);
} else if (sbyte == FEND) {
IN_FRAME = true;
command = CMD_UNKNOWN;
frame_len = 0;
} else if (IN_FRAME && frame_len < AX25_MAX_FRAME_LEN) {
// Have a look at the command byte first
if (frame_len == 0 && command == CMD_UNKNOWN) {
// MicroModem supports only one HDLC port, so we
// strip off the port nibble of the command byte
sbyte = sbyte & 0x0F;
command = sbyte;
} else if (command == CMD_DATA) {
if (sbyte == FESC) {
ESCAPE = true;
} else {
if (ESCAPE) {
if (sbyte == TFEND) sbyte = FEND;
if (sbyte == TFESC) sbyte = FESC;
ESCAPE = false;
}
serialBuffer[frame_len++] = sbyte;
}
} else if (command == CMD_TXDELAY) {
custom_preamble = sbyte * 10UL;
} else if (command == CMD_TXTAIL) {
custom_tail = sbyte * 10;
} else if (command == CMD_SLOTTIME) {
slotTime = sbyte * 10;
} else if (command == CMD_P) {
p = sbyte;
}
}
}

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protocol/KISS.h Normal file
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#ifndef _PROTOCOL_KISS
#define _PROTOCOL_KISS 0x02
#include "../hardware/AFSK.h"
#include "../hardware/Serial.h"
#include "../util/time.h"
#include "AX25.h"
#define FEND 0xC0
#define FESC 0xDB
#define TFEND 0xDC
#define TFESC 0xDD
#define CMD_UNKNOWN 0xFE
#define CMD_DATA 0x00
#define CMD_TXDELAY 0x01
#define CMD_P 0x02
#define CMD_SLOTTIME 0x03
#define CMD_TXTAIL 0x04
#define CMD_FULLDUPLEX 0x05
#define CMD_SETHARDWARE 0x06
#define CMD_RETURN 0xFF
void kiss_init(AX25Ctx *ax25, Afsk *afsk, Serial *ser);
void kiss_csma(AX25Ctx *ctx, uint8_t *buf, size_t len);
void kiss_messageCallback(AX25Ctx *ctx);
void kiss_serialCallback(uint8_t sbyte);
#endif

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protocol/SimpleSerial.c Normal file
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#include "device.h"
#if SERIAL_PROTOCOL == PROTOCOL_SIMPLE_SERIAL
#define ENABLE_HELP true
#include <stdlib.h>
#include <string.h>
#include <avr/eeprom.h>
#include <avr/pgmspace.h>
#include "hardware/Serial.h"
#include "SimpleSerial.h"
#include "util/time.h"
#define countof(a) sizeof(a)/sizeof(a[0])
bool PRINT_SRC = true;
bool PRINT_DST = true;
bool PRINT_PATH = true;
bool PRINT_DATA = true;
bool PRINT_INFO = true;
bool VERBOSE = true;
bool SILENT = false;
bool SS_INIT = false;
bool SS_DEFAULT_CONF = false;
AX25Call src;
AX25Call dst;
AX25Call path1;
AX25Call path2;
char CALL[6] = DEFAULT_CALLSIGN;
int CALL_SSID = 0;
char DST[6] = DEFAULT_DESTINATION_CALL;
int DST_SSID = 0;
char PATH1[6] = "WIDE1";
int PATH1_SSID = 1;
char PATH2[6] = "WIDE2";
int PATH2_SSID = 2;
AX25Call path[4];
AX25Ctx *ax25ctx;
#define NV_MAGIC_BYTE 0x69
uint8_t EEMEM nvMagicByte;
uint8_t EEMEM nvCALL[6];
uint8_t EEMEM nvDST[6];
uint8_t EEMEM nvPATH1[6];
uint8_t EEMEM nvPATH2[6];
uint8_t EEMEM nvCALL_SSID;
uint8_t EEMEM nvDST_SSID;
uint8_t EEMEM nvPATH1_SSID;
uint8_t EEMEM nvPATH2_SSID;
bool EEMEM nvPRINT_SRC;
bool EEMEM nvPRINT_DST;
bool EEMEM nvPRINT_PATH;
bool EEMEM nvPRINT_DATA;
bool EEMEM nvPRINT_INFO;
bool EEMEM nvVERBOSE;
bool EEMEM nvSILENT;
uint8_t EEMEM nvPOWER;
uint8_t EEMEM nvHEIGHT;
uint8_t EEMEM nvGAIN;
uint8_t EEMEM nvDIRECTIVITY;
uint8_t EEMEM nvSYMBOL_TABLE;
uint8_t EEMEM nvSYMBOL;
uint8_t EEMEM nvAUTOACK;
int EEMEM nvPREAMBLE;
int EEMEM nvTAIL;
// Location packet assembly fields
char latitude[8];
char longtitude[9];
char symbolTable = '/';
char symbol = 'n';
uint8_t power = 10;
uint8_t height = 10;
uint8_t gain = 10;
uint8_t directivity = 10;
/////////////////////////
// Message packet assembly fields
char message_recip[6];
int message_recip_ssid = -1;
int message_seq = 0;
char lastMessage[67];
size_t lastMessageLen;
bool message_autoAck = false;
/////////////////////////
extern unsigned long custom_preamble;
extern unsigned long custom_tail;
void ss_init(AX25Ctx *ax25) {
ax25ctx = ax25;
ss_loadSettings();
SS_INIT = true;
if (VERBOSE) {
printf_P(PSTR("---------------\n"));
printf_P(PSTR("MicroAPRS v1.0b\n"));
printf_P(PSTR("unsigned.io/microaprs\n"));
if (SS_DEFAULT_CONF) printf_P(PSTR("Default configuration loaded!\n"));
printf_P(PSTR("Modem ready\n"));
printf_P(PSTR("---------------\n"));
}
}
void ss_clearSettings(void) {
eeprom_update_byte((void*)&nvMagicByte, 0xFF);
if (VERBOSE) printf_P(PSTR("Configuration cleared. Restart to load defaults.\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
void ss_loadSettings(void) {
uint8_t verification = eeprom_read_byte((void*)&nvMagicByte);
if (verification == NV_MAGIC_BYTE) {
eeprom_read_block((void*)CALL, (void*)nvCALL, 6);
eeprom_read_block((void*)DST, (void*)nvDST, 6);
eeprom_read_block((void*)PATH1, (void*)nvPATH1, 6);
eeprom_read_block((void*)PATH2, (void*)nvPATH2, 6);
CALL_SSID = eeprom_read_byte((void*)&nvCALL_SSID);
DST_SSID = eeprom_read_byte((void*)&nvDST_SSID);
PATH1_SSID = eeprom_read_byte((void*)&nvPATH1_SSID);
PATH2_SSID = eeprom_read_byte((void*)&nvPATH2_SSID);
PRINT_SRC = eeprom_read_byte((void*)&nvPRINT_SRC);
PRINT_DST = eeprom_read_byte((void*)&nvPRINT_DST);
PRINT_PATH = eeprom_read_byte((void*)&nvPRINT_PATH);
PRINT_DATA = eeprom_read_byte((void*)&nvPRINT_DATA);
PRINT_INFO = eeprom_read_byte((void*)&nvPRINT_INFO);
VERBOSE = eeprom_read_byte((void*)&nvVERBOSE);
SILENT = eeprom_read_byte((void*)&nvSILENT);
power = eeprom_read_byte((void*)&nvPOWER);
height = eeprom_read_byte((void*)&nvHEIGHT);
gain = eeprom_read_byte((void*)&nvGAIN);
directivity = eeprom_read_byte((void*)&nvDIRECTIVITY);
symbolTable = eeprom_read_byte((void*)&nvSYMBOL_TABLE);
symbol = eeprom_read_byte((void*)&nvSYMBOL);
message_autoAck = eeprom_read_byte((void*)&nvAUTOACK);
custom_preamble = eeprom_read_word((void*)&nvPREAMBLE);
custom_tail = eeprom_read_word((void*)&nvTAIL);
if (VERBOSE && SS_INIT) printf_P(PSTR("Configuration loaded\n"));
} else {
if (SS_INIT && !SILENT && VERBOSE) printf_P(PSTR("Error: No stored configuration to load!\n"));
if (SS_INIT && !SILENT && !VERBOSE) printf_P(PSTR("0\n"));
SS_DEFAULT_CONF = true;
}
}
void ss_saveSettings(void) {
eeprom_update_block((void*)CALL, (void*)nvCALL, 6);
eeprom_update_block((void*)DST, (void*)nvDST, 6);
eeprom_update_block((void*)PATH1, (void*)nvPATH1, 6);
eeprom_update_block((void*)PATH2, (void*)nvPATH2, 6);
eeprom_update_byte((void*)&nvCALL_SSID, CALL_SSID);
eeprom_update_byte((void*)&nvDST_SSID, DST_SSID);
eeprom_update_byte((void*)&nvPATH1_SSID, PATH1_SSID);
eeprom_update_byte((void*)&nvPATH2_SSID, PATH2_SSID);
eeprom_update_byte((void*)&nvPRINT_SRC, PRINT_SRC);
eeprom_update_byte((void*)&nvPRINT_DST, PRINT_DST);
eeprom_update_byte((void*)&nvPRINT_PATH, PRINT_PATH);
eeprom_update_byte((void*)&nvPRINT_DATA, PRINT_DATA);
eeprom_update_byte((void*)&nvPRINT_INFO, PRINT_INFO);
eeprom_update_byte((void*)&nvVERBOSE, VERBOSE);
eeprom_update_byte((void*)&nvSILENT, SILENT);
eeprom_update_byte((void*)&nvPOWER, power);
eeprom_update_byte((void*)&nvHEIGHT, height);
eeprom_update_byte((void*)&nvGAIN, gain);
eeprom_update_byte((void*)&nvDIRECTIVITY, directivity);
eeprom_update_byte((void*)&nvSYMBOL_TABLE, symbolTable);
eeprom_update_byte((void*)&nvSYMBOL, symbol);
eeprom_update_byte((void*)&nvAUTOACK, message_autoAck);
eeprom_update_word((void*)&nvPREAMBLE, custom_preamble);
eeprom_update_word((void*)&nvTAIL, custom_tail);
eeprom_update_byte((void*)&nvMagicByte, NV_MAGIC_BYTE);
if (VERBOSE) printf_P(PSTR("Configuration saved\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
void ss_messageCallback(struct AX25Msg *msg) {
if (PRINT_SRC) {
if (PRINT_INFO) printf_P(PSTR("SRC: "));
printf_P(PSTR("[%.6s-%d] "), msg->src.call, msg->src.ssid);
}
if (PRINT_DST) {
if (PRINT_INFO) printf_P(PSTR("DST: "));
printf_P(PSTR("[%.6s-%d] "), msg->dst.call, msg->dst.ssid);
}
if (PRINT_PATH) {
if (PRINT_INFO) printf_P(PSTR("PATH: "));
for (int i = 0; i < msg->rpt_count; i++)
printf_P(PSTR("[%.6s-%d] "), msg->rpt_list[i].call, msg->rpt_list[i].ssid);
}
if (PRINT_DATA) {
if (PRINT_INFO) printf_P(PSTR("DATA: "), msg->len);
for (int i = 0; i < msg->len; i++) {
putchar(msg->info[i]);
}
}
printf_P(PSTR("\r\n"));
if (message_autoAck && msg->len > 11) {
char mseq[6];
bool shouldAck = true;
int msl = 0;
int loc = msg->len - 1;
size_t i = 0;
while (i<7 && i < msg->len) {
if (msg->info[loc-i] == '{') {
size_t p;
for (p = 0; p <= i; p++) {
mseq[p] = msg->info[loc-i+p];
msl = i;
}
}
i++;
}
if (msl != 0) {
int pos = 1;
int ssidPos = 0;
while (pos < 7) {
if (msg->info[pos] != CALL[pos-1]) {
shouldAck = false;
pos = 7;
}
pos++;
}
while (pos < 10) {
if (msg->info[pos] == '-') ssidPos = pos;
pos++;
}
if (ssidPos != 0) {
if (msg->info[ssidPos+2] == ' ') {
if (msg->info[ssidPos+1]-48 != CALL_SSID) {
shouldAck = false;
}
} else {
int assid = 10+(msg->info[ssidPos+2]-48);
if (assid != CALL_SSID) {
shouldAck = false;
}
}
}
if (msl != 0 && shouldAck) {
int ii = 0;
char *ack = malloc(14+msl);
for (ii = 0; ii < 9; ii++) {
ack[1+ii] = ' ';
}
int calllen = 0;
for (ii = 0; ii < 6; ii++) {
if (msg->src.call[ii] != 0) {
ack[1+ii] = msg->src.call[ii];
calllen++;
}
}
if (msg->src.ssid != 0) {
ack[1+calllen] = '-';
if (msg->src.ssid < 10) {
ack[2+calllen] = msg->src.ssid+48;
} else {
ack[2+calllen] = 49;
ack[3+calllen] = msg->src.ssid-10+48;
}
}
ack[0] = ':';
ack[10] = ':';
ack[11] = 'a';
ack[12] = 'c';
ack[13] = 'k';
for (ii = 0; ii < msl; ii++) {
ack[14+ii] = mseq[ii+1];
}
delay_ms(1750);
ss_sendPkt(ack, 14+msl, ax25ctx);
free(ack);
}
}
}
}
void ss_serialCallback(void *_buffer, size_t length, AX25Ctx *ctx) {
uint8_t *buffer = (uint8_t *)_buffer;
if (length > 0) {
// ! as first char to send packet
if (buffer[0] == '!' && length > 1) {
buffer++; length--;
ss_sendPkt(buffer, length, ctx);
if (VERBOSE) printf_P(PSTR("Packet sent\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == '@') {
buffer++; length--;
ss_sendLoc(buffer, length, ctx);
if (VERBOSE) printf_P(PSTR("Location update sent\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == '#') {
buffer++; length--;
ss_sendMsg(buffer, length, ctx);
if (VERBOSE) printf_P(PSTR("Message sent\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
#if ENABLE_HELP
else if (buffer[0] == 'h') {
ss_printHelp();
}
#endif
else if (buffer[0] == 'H') {
ss_printSettings();
} else if (buffer[0] == 'S') {
ss_saveSettings();
} else if (buffer[0] == 'C') {
ss_clearSettings();
} else if (buffer[0] == 'L') {
ss_loadSettings();
} else if (buffer[0] == 'c' && length > 3) {
buffer++; length--;
int count = 0;
while (length-- && count < 6) {
char c = buffer[count];
if (c != 0 && c != 10 && c != 13) {
CALL[count] = c;
} else {
CALL[count] = 0x00;
}
count++;
}
while (count < 6) {
CALL[count] = 0x00;
count++;
}
if (VERBOSE) printf_P(PSTR("Callsign: %.6s-%d\n"), CALL, CALL_SSID);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == 'd' && length > 3) {
buffer++; length--;
int count = 0;
while (length-- && count < 6) {
char c = buffer[count];
if (c != 0 && c != 10 && c != 13) {
DST[count] = c;
} else {
DST[count] = 0;
}
count++;
}
while (count < 6) {
DST[count] = 0x00;
count++;
}
if (VERBOSE) printf_P(PSTR("Destination: %.6s-%d\n"), DST, DST_SSID);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == '1' && length > 1) {
buffer++; length--;
int count = 0;
while (length-- && count < 6) {
char c = buffer[count];
if (c != 0 && c != 10 && c != 13) {
PATH1[count] = c;
} else {
PATH1[count] = 0;
}
count++;
}
while (count < 6) {
PATH1[count] = 0x00;
count++;
}
if (VERBOSE) printf_P(PSTR("Path1: %.6s-%d\n"), PATH1, PATH1_SSID);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == '2' && length > 1) {
buffer++; length--;
int count = 0;
while (length-- && count < 6) {
char c = buffer[count];
if (c != 0 && c != 10 && c != 13) {
PATH2[count] = c;
} else {
PATH2[count] = 0;
}
count++;
}
while (count < 6) {
PATH2[count] = 0x00;
count++;
}
if (VERBOSE) printf_P(PSTR("Path2: %.6s-%d\n"), PATH2, PATH2_SSID);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == 's' && length > 2) {
buffer++; length--;
if (buffer[0] == 'c') {
if (length > 2 && buffer[2] > 48 && buffer[2] < 58) {
CALL_SSID = 10+buffer[2]-48;
} else {
CALL_SSID = buffer[1]-48;
}
if (VERBOSE) printf_P(PSTR("Callsign: %.6s-%d\n"), CALL, CALL_SSID);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
if (buffer[0] == 'd') {
if (length > 2 && buffer[2] > 48 && buffer[2] < 58) {
DST_SSID = 10+buffer[2]-48;
} else {
DST_SSID = buffer[1]-48;
}
if (VERBOSE) printf_P(PSTR("Destination: %.6s-%d\n"), DST, DST_SSID);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
if (buffer[0] == '1' && buffer[2] > 48 && buffer[2] < 58) {
if (length > 2) {
PATH1_SSID = 10+buffer[2]-48;
} else {
PATH1_SSID = buffer[1]-48;
}
if (VERBOSE) printf_P(PSTR("Path1: %.6s-%d\n"), PATH1, PATH1_SSID);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
if (buffer[0] == '2' && buffer[2] > 48 && buffer[2] < 58) {
if (length > 2) {
PATH2_SSID = 10+buffer[2]-48;
} else {
PATH2_SSID = buffer[1]-48;
}
if (VERBOSE) printf_P(PSTR("Path2: %.6s-%d\n"), PATH2, PATH2_SSID);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
} else if (buffer[0] == 'p' && length > 2) {
buffer++; length--;
if (buffer[0] == 's') {
if (buffer[1] == 49) {
PRINT_SRC = true;
if (VERBOSE) printf_P(PSTR("Print SRC enabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else {
PRINT_SRC = false;
if (VERBOSE) printf_P(PSTR("Print SRC disabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
}
if (buffer[0] == 'd') {
if (buffer[1] == 49) {
PRINT_DST = true;
if (VERBOSE) printf_P(PSTR("Print DST enabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else {
PRINT_DST = false;
if (VERBOSE) printf_P(PSTR("Print DST disabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
}
if (buffer[0] == 'p') {
if (buffer[1] == 49) {
PRINT_PATH = true;
if (VERBOSE) printf_P(PSTR("Print PATH enabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else {
PRINT_PATH = false;
if (VERBOSE) printf_P(PSTR("Print PATH disabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
}
if (buffer[0] == 'm') {
if (buffer[1] == 49) {
PRINT_DATA = true;
if (VERBOSE) printf_P(PSTR("Print DATA enabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else {
PRINT_DATA = false;
if (VERBOSE) printf_P(PSTR("Print DATA disabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
}
if (buffer[0] == 'i') {
if (buffer[1] == 49) {
PRINT_INFO = true;
if (VERBOSE) printf_P(PSTR("Print INFO enabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else {
PRINT_INFO = false;
if (VERBOSE) printf_P(PSTR("Print INFO disabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
}
} else if (buffer[0] == 'v') {
if (buffer[1] == 49) {
VERBOSE = true;
printf_P(PSTR("Verbose mode enabled\n"));
} else {
VERBOSE = false;
printf_P(PSTR("Verbose mode disabled\n"));
}
} else if (buffer[0] == 'V') {
if (buffer[1] == 49) {
SILENT = true;
VERBOSE = false;
printf_P(PSTR("Silent mode enabled\n"));
} else {
SILENT = false;
printf_P(PSTR("Silent mode disabled\n"));
}
} else if (buffer[0] == 'l' && length > 2) {
buffer++; length--;
if (buffer[0] == 'l' && buffer[1] == 'a' && length >= 10) {
buffer += 2;
memcpy(latitude, (void *)buffer, 8);
if (VERBOSE) printf_P(PSTR("Latitude set to %.8s\n"), latitude);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == 'l' && buffer[1] == 'o' && length >= 11) {
buffer += 2;
memcpy(longtitude, (void *)buffer, 9);
if (VERBOSE) printf_P(PSTR("Longtitude set to %.9s\n"), longtitude);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == 'p' && length >= 2 && buffer[1] >= 48 && buffer[1] <= 57) {
power = buffer[1] - 48;
if (VERBOSE) printf_P(PSTR("Power set to %dw\n"), power*power);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == 'h' && length >= 2 && buffer[1] >= 48 && buffer[1] <= 57) {
height = buffer[1] - 48;
if (VERBOSE) printf_P(PSTR("Antenna height set to %ldm AAT\n"), (long)(_BV(height)*1000L)/328L);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == 'g' && length >= 2 && buffer[1] >= 48 && buffer[1] <= 57) {
gain = buffer[1] - 48;
if (VERBOSE) printf_P(PSTR("Gain set to %ddB\n"), gain);
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == 'd' && length >= 2 && buffer[1] >= 48 && buffer[1] <= 57) {
directivity = buffer[1] - 48;
if (directivity == 9) directivity = 8;
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
if (VERBOSE) {
if (directivity == 0) printf_P(PSTR("Directivity set to omni\n"));
if (directivity != 0) printf_P(PSTR("Directivity set to %ddeg\n"), directivity*45);
}
} else if (buffer[0] == 's' && length >= 2) {
symbol = buffer[1];
if (VERBOSE) printf_P(PSTR("Symbol set to %c\n"), symbol);
} else if (buffer[0] == 't' && length >= 2) {
if (buffer[1] == 'a') {
symbolTable = '\\';
if (VERBOSE) printf_P(PSTR("Selected alternate symbol table\n"));
} else {
symbolTable = '/';
if (VERBOSE) printf_P(PSTR("Selected standard symbol table\n"));
}
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
} else if (buffer[0] == 'm' && length > 1) {
buffer++; length--;
if (buffer[0] == 'c' && length > 1) {
buffer++; length--;
int count = 0;
while (length-- && count < 6) {
char c = buffer[count];
if (c != 0 && c != 10 && c != 13) {
message_recip[count] = c;
} else {
message_recip[count] = 0x00;
}
count++;
}
while (count < 6) {
message_recip[count] = 0x00;
count++;
}
if (VERBOSE) {
printf_P(PSTR("Message recipient: %.6s"), message_recip);
if (message_recip_ssid != -1) {
printf_P(PSTR("-%d\n"), message_recip_ssid);
} else {
printf_P(PSTR("\n"));
}
}
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == 's' && length > 1) {
if (length > 2) {
message_recip_ssid = 10+buffer[2]-48;
} else {
message_recip_ssid = buffer[1]-48;
}
if (message_recip_ssid < 0 || message_recip_ssid > 15) message_recip_ssid = -1;
if (VERBOSE) {
printf_P(PSTR("Message recipient: %.6s"), message_recip);
if (message_recip_ssid != -1) {
printf_P(PSTR("-%d\n"), message_recip_ssid);
} else {
printf_P(PSTR("\n"));
}
}
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == 'r') {
ss_msgRetry(ctx);
if (VERBOSE) printf_P(PSTR("Retried last message\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else if (buffer[0] == 'a') {
if (buffer[1] == 49) {
message_autoAck = true;
if (VERBOSE) printf_P(PSTR("Message auto-ack enabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
} else {
message_autoAck = false;
if (VERBOSE) printf_P(PSTR("Message auto-ack disabled\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("1\n"));
}
}
} else if (buffer[0] == 'w' && length >= 2) {
char str[4]; buffer++;
memcpy(str, buffer, length-1);
int preamble = atoi(str);
if (preamble >= 0 && preamble <= 9999) {
custom_preamble = preamble;
printf_P(PSTR("Preamble set to %lums\n"), custom_preamble);
} else {
printf_P(PSTR("Error: Invalid value for preamble\n"));
}
} else if (buffer[0] == 'W' && length >= 2) {
char str[4]; buffer++;
memcpy(str, buffer, length-1);
int tail = atoi(str);
if (tail >= 0 && tail <= 9999) {
custom_tail = tail;
printf_P(PSTR("TX Tail set to %lums\n"), custom_tail);
} else {
printf_P(PSTR("Error: Invalid value for TX tail\n"));
}
} else {
if (VERBOSE) printf_P(PSTR("Error: Invalid command\n"));
if (!VERBOSE && !SILENT) printf_P(PSTR("0\n"));
}
}
}
void ss_sendPkt(void *_buffer, size_t length, AX25Ctx *ax25) {
uint8_t *buffer = (uint8_t *)_buffer;
memcpy(dst.call, DST, 6);
dst.ssid = DST_SSID;
memcpy(src.call, CALL, 6);
src.ssid = CALL_SSID;
memcpy(path1.call, PATH1, 6);
path1.ssid = PATH1_SSID;
memcpy(path2.call, PATH2, 6);
path2.ssid = PATH2_SSID;
path[0] = dst;
path[1] = src;
path[2] = path1;
path[3] = path2;
ax25_sendVia(ax25, path, countof(path), buffer, length);
}
void ss_sendLoc(void *_buffer, size_t length, AX25Ctx *ax25) {
size_t payloadLength = 20+length;
bool usePHG = false;
if (power < 10 && height < 10 && gain < 10 && directivity < 9) {
usePHG = true;
payloadLength += 7;
}
uint8_t *packet = malloc(payloadLength);
uint8_t *ptr = packet;
packet[0] = '=';
packet[9] = symbolTable;
packet[19] = symbol;
ptr++;
memcpy(ptr, latitude, 8);
ptr += 9;
memcpy(ptr, longtitude, 9);
ptr += 10;
if (usePHG) {
packet[20] = 'P';
packet[21] = 'H';
packet[22] = 'G';
packet[23] = power+48;
packet[24] = height+48;
packet[25] = gain+48;
packet[26] = directivity+48;
ptr+=7;
}
if (length > 0) {
uint8_t *buffer = (uint8_t *)_buffer;
memcpy(ptr, buffer, length);
}
//printf_P(PSTR("Assembled packet:\n%.*s\n", payloadLength, packet);
ss_sendPkt(packet, payloadLength, ax25);
free(packet);
}
void ss_sendMsg(void *_buffer, size_t length, AX25Ctx *ax25) {
if (length > 67) length = 67;
size_t payloadLength = 11+length+4;
uint8_t *packet = malloc(payloadLength);
uint8_t *ptr = packet;
packet[0] = ':';
int callSize = 6;
int count = 0;
while (callSize--) {
if (message_recip[count] != 0) {
packet[1+count] = message_recip[count];
count++;
}
}
if (message_recip_ssid != -1) {
packet[1+count] = '-'; count++;
if (message_recip_ssid < 10) {
packet[1+count] = message_recip_ssid+48; count++;
} else {
packet[1+count] = 49; count++;
packet[1+count] = message_recip_ssid-10+48; count++;
}
}
while (count < 9) {
packet[1+count] = ' '; count++;
}
packet[1+count] = ':';
ptr += 11;
if (length > 0) {
uint8_t *buffer = (uint8_t *)_buffer;
memcpy(ptr, buffer, length);
memcpy(lastMessage, buffer, length);
lastMessageLen = length;
}
message_seq++;
if (message_seq > 999) message_seq = 0;
packet[11+length] = '{';
int n = message_seq % 10;
int d = ((message_seq % 100) - n)/10;
int h = (message_seq - d - n) / 100;
packet[12+length] = h+48;
packet[13+length] = d+48;
packet[14+length] = n+48;
//printf_P(PSTR("Assembled packet:\n%.*s\n", payloadLength, packet);
ss_sendPkt(packet, payloadLength, ax25);
free(packet);
}
void ss_msgRetry(AX25Ctx *ax25) {
message_seq--;
ss_sendMsg(lastMessage, lastMessageLen, ax25);
}
void ss_printSettings(void) {
printf_P(PSTR("Configuration:\n"));
printf_P(PSTR("Callsign: %.6s-%d\n"), CALL, CALL_SSID);
printf_P(PSTR("Destination: %.6s-%d\n"), DST, DST_SSID);
printf_P(PSTR("Path1: %.6s-%d\n"), PATH1, PATH1_SSID);
printf_P(PSTR("Path2: %.6s-%d\n"), PATH2, PATH2_SSID);
if (message_autoAck) {
printf_P(PSTR("Auto-ack messages: On\n"));
} else {
printf_P(PSTR("Auto-ack messages: Off\n"));
}
if (power != 10) printf_P(PSTR("Power: %d\n"), power);
if (height != 10) printf_P(PSTR("Height: %d\n"), height);
if (gain != 10) printf_P(PSTR("Gain: %d\n"), gain);
if (directivity != 10) printf_P(PSTR("Directivity: %d\n"), directivity);
if (symbolTable == '\\') printf_P(PSTR("Symbol table: alternate\n"));
if (symbolTable == '/') printf_P(PSTR("Symbol table: standard\n"));
printf_P(PSTR("Symbol: %c\n"), symbol);
printf_P(PSTR("TX Preamble: %lu\n"), custom_preamble);
printf_P(PSTR("TX Tail: %lu\n"), custom_tail);
}
#if ENABLE_HELP
void ss_printHelp(void) {
printf_P(PSTR("----------------------------------\n"));
printf_P(PSTR("Serial commands:\n"));
printf_P(PSTR("!<data> Send raw packet\n"));
printf_P(PSTR("@<cmt> Send location update (cmt = optional comment)\n"));
printf_P(PSTR("#<msg> Send APRS message\n\n"));
printf_P(PSTR("c<call> Set your callsign\n"));
printf_P(PSTR("d<call> Set destination callsign\n"));
printf_P(PSTR("1<call> Set PATH1 callsign\n"));
printf_P(PSTR("2<call> Set PATH2 callsign\n\n"));
printf_P(PSTR("sc<ssid> Set your SSID\n"));
printf_P(PSTR("sd<ssid> Set destination SSID\n"));
printf_P(PSTR("s1<ssid> Set PATH1 SSID\n"));
printf_P(PSTR("s2<ssid> Set PATH2 SSID\n\n"));
printf_P(PSTR("lla<LAT> Set latitude (NMEA-format, eg 4903.50N)\n"));
printf_P(PSTR("llo<LON> Set latitude (NMEA-format, eg 07201.75W)\n"));
printf_P(PSTR("lp<0-9> Set TX power info\n"));
printf_P(PSTR("lh<0-9> Set antenna height info\n"));
printf_P(PSTR("lg<0-9> Set antenna gain info\n"));
printf_P(PSTR("ld<0-9> Set antenna directivity info\n"));
printf_P(PSTR("ls<sym> Select symbol\n"));
printf_P(PSTR("lt<s/a> Select symbol table (standard/alternate)\n\n"));
printf_P(PSTR("mc<call> Set message recipient callsign\n"));
printf_P(PSTR("ms<ssid> Set message recipient SSID\n"));
printf_P(PSTR("mr<ssid> Retry last message\n"));
printf_P(PSTR("ma<1/0> Automatic message ACK on/off\n\n"));
printf_P(PSTR("ps<1/0> Print SRC on/off\n"));
printf_P(PSTR("pd<1/0> Print DST on/off\n"));
printf_P(PSTR("pp<1/0> Print PATH on/off\n"));
printf_P(PSTR("pm<1/0> Print DATA on/off\n"));
printf_P(PSTR("pi<1/0> Print INFO on/off\n\n"));
printf_P(PSTR("v<1/0> Verbose mode on/off\n"));
printf_P(PSTR("V<1/0> Silent mode on/off\n\n"));
printf_P(PSTR("w<XXX> Set preamble time in ms\n"));
printf_P(PSTR("W<XXX> Set transmission tail time in ms\n"));
printf_P(PSTR("S Save configuration\n"));
printf_P(PSTR("L Load configuration\n"));
printf_P(PSTR("C Clear configuration\n"));
printf_P(PSTR("H Print configuration\n"));
printf_P(PSTR("----------------------------------\n"));
}
#endif
#endif

25
protocol/SimpleSerial.h Normal file
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#ifndef _PROTOCOL_SIMPLE_SERIAL
#define _PROTOCOL_SIMPLE_SERIAL 0x01
#include "AX25.h"
#define DEFAULT_CALLSIGN "NOCALL"
#define DEFAULT_DESTINATION_CALL "APZMDM"
void ss_init(AX25Ctx *ax25);
void ss_messageCallback(struct AX25Msg *msg);
void ss_serialCallback(void *_buffer, size_t length, AX25Ctx *ctx);
void ss_sendPkt(void *_buffer, size_t length, AX25Ctx *ax25);
void ss_sendLoc(void *_buffer, size_t length, AX25Ctx *ax25);
void ss_sendMsg(void *_buffer, size_t length, AX25Ctx *ax25);
void ss_msgRetry(AX25Ctx *ax25);
void ss_clearSettings(void);
void ss_loadSettings(void);
void ss_saveSettings(void);
void ss_printSettings(void);
void ss_printHelp(void);
#endif

36
util/CRC-CCIT.c Normal file
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#include "CRC-CCIT.h"
const uint16_t crc_ccit_table[256] PROGMEM = {
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78,
};

18
util/CRC-CCIT.h Normal file
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// CRC-CCIT Implementation based on work by Francesco Sacchi
#ifndef CRC_CCIT_H
#define CRC_CCIT_H
#include <stdint.h>
#include <avr/pgmspace.h>
#define CRC_CCIT_INIT_VAL ((uint16_t)0xFFFF)
extern const uint16_t crc_ccit_table[256];
inline uint16_t update_crc_ccit(uint8_t c, uint16_t prev_crc) {
return (prev_crc >> 8) ^ pgm_read_word(&crc_ccit_table[(prev_crc ^ c) & 0xff]);
}
#endif

85
util/FIFO.h Normal file
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#ifndef UTIL_FIFO_H
#define UTIL_FIFO_H
#include <stddef.h>
#include <util/atomic.h>
typedef struct FIFOBuffer
{
unsigned char *begin;
unsigned char *end;
unsigned char * volatile head;
unsigned char * volatile tail;
} FIFOBuffer;
inline bool fifo_isempty(const FIFOBuffer *f) {
return f->head == f->tail;
}
inline bool fifo_isfull(const FIFOBuffer *f) {
return ((f->head == f->begin) && (f->tail == f->end)) || (f->tail == f->head - 1);
}
inline void fifo_push(FIFOBuffer *f, unsigned char c) {
*(f->tail) = c;
if (f->tail == f->end) {
f->tail = f->begin;
} else {
f->tail++;
}
}
inline unsigned char fifo_pop(FIFOBuffer *f) {
if(f->head == f->end) {
f->head = f->begin;
return *(f->end);
} else {
return *(f->head++);
}
}
inline void fifo_flush(FIFOBuffer *f) {
f->head = f->tail;
}
inline bool fifo_isempty_locked(const FIFOBuffer *f) {
bool result;
ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
result = fifo_isempty(f);
}
return result;
}
inline bool fifo_isfull_locked(const FIFOBuffer *f) {
bool result;
ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
result = fifo_isfull(f);
}
return result;
}
inline void fifo_push_locked(FIFOBuffer *f, unsigned char c) {
ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
fifo_push(f, c);
}
}
inline unsigned char fifo_pop_locked(FIFOBuffer *f) {
unsigned char c;
ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
c = fifo_pop(f);
}
return c;
}
inline void fifo_init(FIFOBuffer *f, unsigned char *buffer, size_t size) {
f->head = f->tail = f->begin = buffer;
f->end = buffer + size -1;
}
inline size_t fifo_len(FIFOBuffer *f) {
return f->end - f->begin;
}
#endif

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util/constants.h Normal file
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#define PROTOCOL_KISS 0x01
#define PROTOCOL_SIMPLE_SERIAL 0x02
#define m328p 0x01
#define m1284p 0x02
#define m644p 0x03
#define REF_3V3 0x01
#define REF_5V 0x02

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util/time.h Normal file
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#ifndef UTIL_TIME_H
#define UTIL_TIME_H
#include <util/atomic.h>
#include "device.h"
#define DIV_ROUND(dividend, divisor) (((dividend) + (divisor) / 2) / (divisor))
#define CLOCK_TICKS_PER_SEC CONFIG_AFSK_DAC_SAMPLERATE
typedef int32_t ticks_t;
typedef int32_t mtime_t;
volatile ticks_t _clock;
inline ticks_t timer_clock(void) {
ticks_t result;
ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
result = _clock;
}
return result;
}
inline ticks_t ms_to_ticks(mtime_t ms) {
return ms * DIV_ROUND(CLOCK_TICKS_PER_SEC, 1000);
}
inline void cpu_relax(void) {
// Do nothing!
}
inline void delay_ms(unsigned long ms) {
ticks_t start = timer_clock();
unsigned long n_ticks = ms_to_ticks(ms);
while (timer_clock() - start < n_ticks) {
cpu_relax();
}
}
#endif