SimpleSerial configurable preamble and tail.

Modem/afsk.c

@@ -13,10 +13,8 @@
 #include <struct/fifobuf.h> // FIFO buffer implementation from BertOS
 #include <string.h>         // String operations, primarily used for memset function
 
-#if SERIAL_PROTOCOL == PROTOCOL_KISS
+extern unsigned long custom_preamble;
-    extern unsigned long kiss_preamble;
+extern unsigned long custom_tail;
-    extern unsigned long kiss_tail;
-#endif
 
 //////////////////////////////////////////////////////
 // Definitions and some useful macros               //
@@ -453,22 +451,18 @@ static void afsk_txStart(Afsk *afsk) {
         LED_TX_ON();
         // We also need to calculate how many HDLC_FLAG
         // bytes we need to send in preamble
-        #if SERIAL_PROTOCOL == PROTOCOL_KISS
+        afsk->preambleLength = DIV_ROUND(custom_preamble * BITRATE, 8000);
-            afsk->preambleLength = DIV_ROUND(kiss_preamble * BITRATE, 8000);
+        //afsk->preambleLength = DIV_ROUND(CONFIG_AFSK_PREAMBLE_LEN * BITRATE, 8000);
-        #else
+
-            afsk->preambleLength = DIV_ROUND(CONFIG_AFSK_PREAMBLE_LEN * BITRATE, 8000);
-        #endif
         AFSK_DAC_IRQ_START();
     }
     // We make the same calculation for the tail length,
     // but this needs to be atomic, since the txStart
     // function could potentially be called while we
     // are already transmitting.
-    #if SERIAL_PROTOCOL == PROTOCOL_KISS
+
-        ATOMIC(afsk->tailLength = DIV_ROUND(kiss_tail * BITRATE, 8000));
+    ATOMIC(afsk->tailLength = DIV_ROUND(custom_tail * BITRATE, 8000));
-    #else
+    //ATOMIC(afsk->tailLength = DIV_ROUND(CONFIG_AFSK_TRAILER_LEN * BITRATE, 8000));
-        ATOMIC(afsk->tailLength = DIV_ROUND(CONFIG_AFSK_TRAILER_LEN * BITRATE, 8000));
-    #endif
 }
 
 // This is the DAC ISR, called at sampling rate whenever the DAC IRQ is on.

Modem/protocol/KISS.c

@@ -13,8 +13,8 @@ size_t frame_len;
 bool IN_FRAME;
 bool ESCAPE;
 uint8_t command = CMD_UNKNOWN;
-unsigned long kiss_preamble = CONFIG_AFSK_PREAMBLE_LEN;
+unsigned long custom_preamble = CONFIG_AFSK_PREAMBLE_LEN;
-unsigned long kiss_tail = CONFIG_AFSK_TRAILER_LEN;
+unsigned long custom_tail = CONFIG_AFSK_TRAILER_LEN;
 
 void kiss_init(AX25Ctx *ax25, Serial *ser) {
     ax25ctx = ax25;
@@ -72,9 +72,9 @@ void kiss_serialCallback(uint8_t sbyte) {
                 serialBuffer[frame_len++] = sbyte;
             }
         } else if (command == CMD_TXDELAY) {
-            kiss_preamble = sbyte * 10UL;
+            custom_preamble = sbyte * 10UL;
         } else if (command == CMD_TXTAIL) {
-            kiss_tail = sbyte * 10;
+            custom_tail = sbyte * 10;
         } 
         
     }

Modem/protocol/SimpleSerial.c

@@ -58,6 +58,8 @@ 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];
@@ -81,6 +83,9 @@ 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();
@@ -130,6 +135,9 @@ void ss_loadSettings(void) {
         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) kprintf("Configuration loaded\n");
     } else {
@@ -166,6 +174,9 @@ void ss_saveSettings(void) {
     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) kprintf("Configuration saved\n");
@@ -554,7 +565,6 @@ void ss_serialCallback(void *_buffer, size_t length, Serial *ser, AX25Ctx *ctx)
                 if (!VERBOSE && !SILENT) kprintf("1\n");
             }
 
-
         } else if (buffer[0] == 'm' && length > 1) {
             buffer++; length--;
             if (buffer[0] == 'c' && length > 1) {
@@ -614,7 +624,27 @@ void ss_serialCallback(void *_buffer, size_t length, Serial *ser, AX25Ctx *ctx)
                 }
             }
 
-        } else {
+        } 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;
+                kprintf("Preamble set to %dms\n", custom_preamble);
+            } else  {
+                kprintf("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;
+                kprintf("TX Tail set to %dms\n", custom_tail);
+            } else  {
+                kprintf("Error: Invalid value for TX tail\n");
+            }
+        }  else {
             if (VERBOSE) kprintf("Error: Invalid command\n");
             if (!VERBOSE && !SILENT) kprintf("0\n");
         }
@@ -761,6 +791,8 @@ void ss_printSettings(void) {
     if (symbolTable == '\\') kprintf("Symbol table: alternate\n");
     if (symbolTable == '/') kprintf("Symbol table: standard\n");
     kprintf("Symbol: %c\n", symbol);
+    kprintf("TX Preamble: %d\n", custom_preamble);
+    kprintf("TX Tail: %d\n", custom_tail);
 }
 
 #if ENABLE_HELP

buildrev.h

@@ -1,2 +1,2 @@
-#define VERS_BUILD 2341
+#define VERS_BUILD 2364
 #define VERS_HOST  "shard"