#ifndef PROTOCOL_MP1 #define PROTOCOL_MP1 #include #include // Frame sizing #define MP1_MIN_FRAME_LENGTH 1 #define MP1_MAX_FRAME_LENGTH 300 // We need to know some basic HDLC flag bytes #define HDLC_FLAG 0x7E #define HDLC_RESET 0x7F #define AX25_ESC 0x1B // Just a forward declaration that this struct exists struct MP1Packet; // The type of a callback function for passing // back a decoded packet typedef void (*mp1_callback_t)(struct MP1Packet *packet); // Struct for a protocol context typedef struct MP1 { uint8_t buffer[MP1_MAX_FRAME_LENGTH]; // A buffer for incoming packets KFile *modem; // KFile access to the modem size_t packetLength; // Counter for received packet length mp1_callback_t callback; // The function to call when a packet has been received bool reading; // True when we have seen a HDLC flag bool escape; // We need to know if we are in an escape sequence } MP1; // A struct encapsulating a network packet typedef struct MP1Packet { const uint8_t *data; // Pointer to the actual data in the packet size_t dataLength; // The length of the received data } MP1Packet; void mp1Init(MP1 *mp1, KFile *modem, mp1_callback_t callback); void mp1Poll(MP1 *mp1); void mp1Send(MP1 *mp1, const void *_buffer, size_t length); #endif