TransmitResult internalSendPacket(const uint8_t *buff, const size_t &length, const uint32_t maxTimeoutUs, bool requestAck)
{
irq = false;
const size_t toSendLength = MIN(length, RFM73_MAX_PACKET_LEN);
sendPayload(buff, toSendLength, requestAck ? 1 : 0);
TransmitResult result;
uint32_t i = 0;
uint8_t status = 0;
bool readStatus = true;
while (!irq && i++ < maxTimeoutUs)
{
delayMicroseconds(1);
if (i >= 10 && i % 5 == 0)
{
if (checkStatusForMissingIRQ(status))
{
readStatus = false;
break;
}
}
}
if (readStatus)
{
status = readRegVal(RFM73_REG_STATUS);
}
if (status & RFM73_IRQ_STATUS_TX_DS)
{
result.status = Success;
result.bytesSent = toSendLength;
}
else if (status & RFM73_IRQ_STATUS_MAX_RT)
{
result.status = MaxRT;
result.bytesSent = 0;
}
else if (status & RFM73_IRQ_STATUS_TX_FULL)
{
result.status = FifoFull;
result.bytesSent = 0;
}
if (i >= maxTimeoutUs)
{
result.status = Unknown;
result.bytesSent = 0;
}
// Reset error flags
writeRegVal(RFM73_CMD_WRITE_REG | RFM73_REG_STATUS, status);
return result;
}
TransmitResult_t RFM75_Transmit_bytes(const uint8_t *buff,
const uint32_t *length,
const uint32_t maxTimeoutUs,
bool requestAck)
{
TransmitResult_t result;
const uint32_t toSendLength = *length;
uint32_t i=0;
uint8_t status = 0;
bool readStatus = true;
sendPayload(buff, toSendLength, (uint8_t)requestAck);
rxtx_interrupt = 0;
while((rxtx_interrupt == 0) &&
(i < maxTimeoutUs)){
_delay_us(20);
if(checkStatusForMissingIRQ(&status)){
readStatus=false;
break;
}
i++;
}
rxtx_interrupt = 0;
/* Clear the status interrupt */
writeRegVal(RFM7x_CMD_WRITE_REG | RFM7x_REG_STATUS, status);
if (readStatus){
status = readRegVal(RFM7x_REG_STATUS);
}
if (status & RFM7x_IRQ_STATUS_TX_DS){
result.status = SUCCESS;
result.bytesSent = toSendLength;
}
else if (status & RFM7x_IRQ_STATUS_MAX_RT){
result.status = MAXRT;
result.bytesSent = 0;
}
else if (status & RFM7x_IRQ_STATUS_TX_FULL){
result.status = FIFOFULL;
result.bytesSent = 0;
}
if (i >= maxTimeoutUs){
result.status = UNKNOWN;
result.bytesSent = 0;
}
return result;
}
