TransmitResult internalSend(const uint8_t *buff, const size_t &length, bool requestAck)
{
Serial.print("Start sending ");
Serial.print(length);
Serial.println('B');
uint8_t setupRetr = readRegVal(RFM73_REG_SETUP_RETR);
uint32_t maxTimeoutUs = (uint32_t)(((setupRetr & 0b11110000) >> 4) + 1) * 250UL * (uint32_t)(setupRetr & 0b00001111);
maxTimeoutUs += maxTimeoutUs / 2UL;
if (maxTimeoutUs == 0) maxTimeoutUs = 250;
CE_HIGH;
TransmitResult result;
result.status = Success;
result.bytesSent = 0;
const int maxPacketAttempts = 50;
for (size_t i = 0; i < length; i += RFM73_MAX_PACKET_LEN)
{
int packetAttempts = maxPacketAttempts;
while (packetAttempts--)
{
if (result.status != Success)
{
Serial.print("Packet send error: ");
Serial.print((int)result.status);
Serial.print(", retrying (");
Serial.print(maxPacketAttempts - packetAttempts);
Serial.print('/');
Serial.print(maxPacketAttempts);
Serial.println(")...");
}
result += internalSendPacket(buff + i, MIN(length - i, RFM73_MAX_PACKET_LEN), maxTimeoutUs, requestAck);
if (result.status == Success)
{
break;
}
else if (result.status == FifoFull)
{
flushTxFIFO();
}
_delay_ms(100);
}
if (result.status != Success)
{
break;
}
}
CE_LOW;
return result;
}
/**
* boolean send(char*) : function to enqueue a packet for transmission
* returns: true, false
**/
void RFM70::send(uint8_t* s, uint8_t len) {
//switch to tx mode
cliTxDs();
setMode(MODE_PTX);
if (txTimeout()) {
flushTxFIFO();
cliTimeout();
}
sendPayload(s, len);
//wait for packet to be sent
_delay_us(SEND_DELAY);
//switch to rx mode
cliRxDr();
setMode(MODE_PRX);
}
/**
* boolean send(char*) : function to enqueue a packet for transmission
* returns: true, false
**/
void RFM70::send(uint8_t* s, uint8_t len)
{
// Switch to tx mode
pthread_mutex_lock(&g_mutex);
cliTxDs();
setMode(MODE_PTX);
if (txTimeout()) {
flushTxFIFO();
cliTimeout();
}
sendPayload(s, len);
//wait for packet to be sent
usleep(SEND_DELAY);
//switch to rx mode
cliRxDr();
setMode(MODE_PRX);
pthread_mutex_unlock(&g_mutex);
}
