void serialCom() {
uint8_t c,cc,port,state,bytesTXBuff;
static uint8_t offset[UART_NUMBER];
static uint8_t dataSize[UART_NUMBER];
static uint8_t c_state[UART_NUMBER];
uint32_t timeMax; // limit max time in this function in case of GPS
timeMax = micros();
for(port=0;port<UART_NUMBER;port++) {
CURRENTPORT=port;
#define RX_COND
#if defined(SERIAL_RX) && (UART_NUMBER > 1)
#define RX_COND && (RX_SERIAL_PORT != port)
#endif
cc = SerialAvailable(port);
while (cc-- RX_COND) {
bytesTXBuff = SerialUsedTXBuff(port); // indicates the number of occupied bytes in TX buffer
if (bytesTXBuff > TX_BUFFER_SIZE - 50 ) return; // ensure there is enough free TX buffer to go further (50 bytes margin)
c = SerialRead(port);
#ifdef SUPPRESS_ALL_SERIAL_MSP
evaluateOtherData(c); // no MSP handling, so go directly
#else //SUPPRESS_ALL_SERIAL_MSP
state = c_state[port];
// regular data handling to detect and handle MSP and other data
if (state == IDLE) {
if (c=='$') state = HEADER_START;
else evaluateOtherData(c); // evaluate all other incoming serial data
}
else if (state == HEADER_START) {
state = (c=='M') ? HEADER_M : IDLE;
}
else if (state == HEADER_M) {
state = (c=='<') ? HEADER_ARROW : IDLE;
}
else if (state == HEADER_ARROW) {
if (c > INBUF_SIZE) { // now we are expecting the payload size
state = IDLE;
continue;
}
dataSize[port] = c;
checksum[port] = c;
offset[port] = 0;
indRX[port] = 0;
state = HEADER_SIZE; // the command is to follow
}
else if (state == HEADER_SIZE) {
cmdMSP[port] = c;
checksum[port] ^= c;
state = HEADER_CMD;
}
else if (state == HEADER_CMD) {
if (offset[port] < dataSize[port]) {
checksum[port] ^= c;
inBuf[offset[port]++][port] = c;
}
else {
if (checksum[port] == c) // compare calculated and transferred checksum
evaluateCommand(cmdMSP[port]); // we got a valid packet, evaluate it
state = IDLE;
cc = 0; // no more than one MSP per port and per cycle
}
}
c_state[port] = state;
// SERIAL: try to detect a new nav frame based on the current received buffer
#if defined(GPS_SERIAL)
if (GPS_SERIAL == port) {
static uint32_t GPS_last_frame_seen; //Last gps frame seen at this time, used to detect stalled gps communication
if (GPS_newFrame(c)) {
//We had a valid GPS data frame, so signal task scheduler to switch to compute
if (GPS_update == 1) GPS_update = 0;
else GPS_update = 1; //Blink GPS update
GPS_last_frame_seen = timeMax;
GPS_Frame = 1;
}
// Check for stalled GPS, if no frames seen for 1.2sec then consider it LOST
if ((timeMax - GPS_last_frame_seen) > 1200000) {
//No update since 1200ms clear fix...
f.GPS_FIX = 0;
GPS_numSat = 0;
}
}
if (micros()-timeMax>250) return; // Limit the maximum execution time of serial decoding to avoid time spike
#endif
#endif // SUPPRESS_ALL_SERIAL_MSP
} // while
} // for
}
void serialCom() {
uint8_t c,n;
static uint8_t offset[UART_NUMBER];
static uint8_t dataSize[UART_NUMBER];
static enum _serial_state {
IDLE,
HEADER_START,
HEADER_M,
HEADER_ARROW,
HEADER_SIZE,
HEADER_CMD,
} c_state[UART_NUMBER];// = IDLE;
for(n=0;n<UART_NUMBER;n++) {
#if !defined(PROMINI)
CURRENTPORT=n;
#endif
#define GPS_COND
#if defined(GPS_SERIAL)
#if defined(GPS_PROMINI)
#define GPS_COND
#else
#undef GPS_COND
#define GPS_COND && (GPS_SERIAL != CURRENTPORT)
#endif
#endif
#define SPEK_COND
#if defined(SPEKTRUM) && (UART_NUMBER > 1)
#define SPEK_COND && (SPEK_SERIAL_PORT != CURRENTPORT)
#endif
#define SBUS_COND
#if defined(SBUS) && (UART_NUMBER > 1)
#define SBUS_COND && (SBUS_SERIAL_PORT != CURRENTPORT)
#endif
uint8_t cc = SerialAvailable(CURRENTPORT);
while (cc-- GPS_COND SPEK_COND SBUS_COND) {
uint8_t bytesTXBuff = SerialUsedTXBuff(CURRENTPORT); // indicates the number of occupied bytes in TX buffer
if (bytesTXBuff > TX_BUFFER_SIZE - 50 ) return; // ensure there is enough free TX buffer to go further (50 bytes margin)
c = SerialRead(CURRENTPORT);
#ifdef SUPPRESS_ALL_SERIAL_MSP
// no MSP handling, so go directly
evaluateOtherData(c);
#else
// regular data handling to detect and handle MSP and other data
if (c_state[CURRENTPORT] == IDLE) {
c_state[CURRENTPORT] = (c=='$') ? HEADER_START : IDLE;
if (c_state[CURRENTPORT] == IDLE) evaluateOtherData(c); // evaluate all other incoming serial data
} else if (c_state[CURRENTPORT] == HEADER_START) {
c_state[CURRENTPORT] = (c=='M') ? HEADER_M : IDLE;
} else if (c_state[CURRENTPORT] == HEADER_M) {
c_state[CURRENTPORT] = (c=='<') ? HEADER_ARROW : IDLE;
} else if (c_state[CURRENTPORT] == HEADER_ARROW) {
if (c > INBUF_SIZE) { // now we are expecting the payload size
c_state[CURRENTPORT] = IDLE;
continue;
}
dataSize[CURRENTPORT] = c;
offset[CURRENTPORT] = 0;
checksum[CURRENTPORT] = 0;
indRX[CURRENTPORT] = 0;
checksum[CURRENTPORT] ^= c;
c_state[CURRENTPORT] = HEADER_SIZE; // the command is to follow
} else if (c_state[CURRENTPORT] == HEADER_SIZE) {
cmdMSP[CURRENTPORT] = c;
checksum[CURRENTPORT] ^= c;
c_state[CURRENTPORT] = HEADER_CMD;
} else if (c_state[CURRENTPORT] == HEADER_CMD && offset[CURRENTPORT] < dataSize[CURRENTPORT]) {
checksum[CURRENTPORT] ^= c;
inBuf[offset[CURRENTPORT]++][CURRENTPORT] = c;
} else if (c_state[CURRENTPORT] == HEADER_CMD && offset[CURRENTPORT] >= dataSize[CURRENTPORT]) {
if (checksum[CURRENTPORT] == c) { // compare calculated and transferred checksum
evaluateCommand(); // we got a valid packet, evaluate it
}
c_state[CURRENTPORT] = IDLE;
cc = 0; // no more than one MSP per port and per cycle
}
#endif // SUPPRESS_ALL_SERIAL_MSP
}
}
}
void serialCom() {
uint8_t c,cc,port,state,bytesTXBuff;
static uint8_t offset[UART_NUMBER];
static uint8_t dataSize[UART_NUMBER];
static uint8_t c_state[UART_NUMBER];
for(port=0;port<UART_NUMBER;port++) {
CURRENTPORT=port;
#define GPS_COND
#if defined(GPS_SERIAL) && (UART_NUMBER > 1)
#define GPS_COND && (GPS_SERIAL != port)
#endif
#define RX_COND
#if (defined(SPEKTRUM) || defined(SBUS) || defined(SUMD)) && (UART_NUMBER > 1)
#define RX_COND && (RX_SERIAL_PORT != port)
#endif
cc = SerialAvailable(port);
while (cc-- GPS_COND RX_COND) {
bytesTXBuff = SerialUsedTXBuff(port); // indicates the number of occupied bytes in TX buffer
if (bytesTXBuff > TX_BUFFER_SIZE - 50 ) return; // ensure there is enough free TX buffer to go further (50 bytes margin)
c = SerialRead(port);
#ifdef SUPPRESS_ALL_SERIAL_MSP
// no MSP handling, so go directly
evaluateOtherData(c);
#else
state = c_state[port];
// regular data handling to detect and handle MSP and other data
if (state == IDLE) {
if (c=='$') state = HEADER_START;
else evaluateOtherData(c); // evaluate all other incoming serial data
} else if (state == HEADER_START) {
state = (c=='M') ? HEADER_M : IDLE;
} else if (state == HEADER_M) {
state = (c=='<') ? HEADER_ARROW : IDLE;
} else if (state == HEADER_ARROW) {
if (c > INBUF_SIZE) { // now we are expecting the payload size
state = IDLE;
continue;
}
dataSize[port] = c;
offset[port] = 0;
checksum[port] = 0;
indRX[port] = 0;
checksum[port] ^= c;
state = HEADER_SIZE; // the command is to follow
} else if (state == HEADER_SIZE) {
cmdMSP[port] = c;
checksum[port] ^= c;
state = HEADER_CMD;
} else if (state == HEADER_CMD) {
if (offset[port] < dataSize[port]) {
checksum[port] ^= c;
inBuf[offset[port]++][port] = c;
} else {
if (checksum[port] == c) // compare calculated and transferred checksum
evaluateCommand(); // we got a valid packet, evaluate it
state = IDLE;
cc = 0; // no more than one MSP per port and per cycle
}
}
c_state[port] = state;
#endif // SUPPRESS_ALL_SERIAL_MSP
}
}
}
