/*!
* \brief Prepares the payload of the frame
*
* \retval [0: frame could be sent, 1: error]
*/
static bool SendFrame( void )
{
pc.printf("SendFrame\r\n");
McpsReq_t mcpsReq;
LoRaMacTxInfo_t txInfo;
if( LoRaMacQueryTxPossible( AppDataSize, &txInfo ) != LORAMAC_STATUS_OK ) // Unable to send frame
{
pc.printf("SendFrame - Unable to Send\r\n");
// Send empty frame in order to flush MAC commands
mcpsReq.Type = MCPS_UNCONFIRMED;
mcpsReq.Req.Unconfirmed.fBuffer = NULL;
mcpsReq.Req.Unconfirmed.fBufferSize = 0;
mcpsReq.Req.Unconfirmed.Datarate = LORAWAN_DEFAULT_DATARATE;
}
else // Frame is ok to send
{
if( IsTxConfirmed == false ) // Configured at start of main.cpp
{
pc.printf("SendFrame - Unconfirmed\r\n");
mcpsReq.Type = MCPS_UNCONFIRMED;
mcpsReq.Req.Unconfirmed.fPort = AppPort;
mcpsReq.Req.Unconfirmed.fBuffer = AppData;
mcpsReq.Req.Unconfirmed.fBufferSize = AppDataSize;
mcpsReq.Req.Unconfirmed.Datarate = LORAWAN_DEFAULT_DATARATE;
}
else
{
pc.printf("SendFrame - Confirmed\r\n");
mcpsReq.Type = MCPS_CONFIRMED;
mcpsReq.Req.Confirmed.fPort = AppPort;
mcpsReq.Req.Confirmed.fBuffer = AppData;
mcpsReq.Req.Confirmed.fBufferSize = AppDataSize;
mcpsReq.Req.Confirmed.NbTrials = 8; // number of retries in case of failure to confirm
mcpsReq.Req.Confirmed.Datarate = LORAWAN_DEFAULT_DATARATE;
}
}
/* Possible return values of LoRaMacMcpsRequest are:
* \ref LORAMAC_STATUS_OK,
* \ref LORAMAC_STATUS_BUSY,
* \ref LORAMAC_STATUS_SERVICE_UNKNOWN,
* \ref LORAMAC_STATUS_PARAMETER_INVALID,
* \ref LORAMAC_STATUS_NO_NETWORK_JOINED,
* \ref LORAMAC_STATUS_LENGTH_ERROR,
* \ref LORAMAC_STATUS_DEVICE_OFF.
*/
pc.printf("SendFrame LoRaMacMcpsRequest Status = %d\r\n", LoRaMacMcpsRequest( &mcpsReq ) );
if( LoRaMacMcpsRequest( &mcpsReq ) == LORAMAC_STATUS_OK )
{
return false; // NextTx is set to this, meaning don't resend
}
return true; // NextTx is set to this, so will resend
}
/*!
* \brief Prepares the payload of the frame
*
* \retval [0: frame could be send, 1: error]
*/
static bool SendFrame( void )
{
McpsReq_t mcpsReq;
LoRaMacTxInfo_t txInfo;
if( LoRaMacQueryTxPossible( AppDataSize, &txInfo ) != LORAMAC_STATUS_OK )
{
// Send empty frame in order to flush MAC commands
mcpsReq.Type = MCPS_UNCONFIRMED;
mcpsReq.Req.Unconfirmed.fBuffer = NULL;
mcpsReq.Req.Unconfirmed.fBufferSize = 0;
mcpsReq.Req.Unconfirmed.Datarate = LORAWAN_DEFAULT_DATARATE;
}
else
{
if( IsTxConfirmed == false )
{
mcpsReq.Type = MCPS_UNCONFIRMED;
mcpsReq.Req.Unconfirmed.fPort = AppPort;
mcpsReq.Req.Unconfirmed.fBuffer = AppData;
mcpsReq.Req.Unconfirmed.fBufferSize = AppDataSize;
mcpsReq.Req.Unconfirmed.Datarate = LORAWAN_DEFAULT_DATARATE;
}
else
{
mcpsReq.Type = MCPS_CONFIRMED;
mcpsReq.Req.Confirmed.fPort = AppPort;
mcpsReq.Req.Confirmed.fBuffer = AppData;
mcpsReq.Req.Confirmed.fBufferSize = AppDataSize;
mcpsReq.Req.Confirmed.NbTrials = 8;
mcpsReq.Req.Confirmed.Datarate = LORAWAN_DEFAULT_DATARATE;
}
}
if( LoRaMacMcpsRequest( &mcpsReq ) == LORAMAC_STATUS_OK )
{
return false;
}
return true;
}
/* Prepares the payload of the frame */
static uint8_t _semtech_loramac_send(semtech_loramac_t *mac,
uint8_t *payload, uint8_t len)
{
DEBUG("[semtech-loramac] send frame %s\n", (char *)payload);
McpsReq_t mcpsReq;
LoRaMacTxInfo_t txInfo;
uint8_t dr = semtech_loramac_get_dr(mac);
if (LoRaMacQueryTxPossible(len, &txInfo) != LORAMAC_STATUS_OK) {
DEBUG("[semtech-loramac] empty frame in order to flush MAC commands\n");
/* Send empty frame in order to flush MAC commands */
mcpsReq.Type = MCPS_UNCONFIRMED;
mcpsReq.Req.Unconfirmed.fBuffer = NULL;
mcpsReq.Req.Unconfirmed.fBufferSize = 0;
mcpsReq.Req.Unconfirmed.Datarate = (int8_t)dr;
}
else {
if (mac->cnf == LORAMAC_TX_UNCNF) {
DEBUG("[semtech-loramac] MCPS request: unconfirmed TX\n");
mcpsReq.Type = MCPS_UNCONFIRMED;
mcpsReq.Req.Unconfirmed.fPort = mac->port;
mcpsReq.Req.Unconfirmed.fBuffer = payload;
mcpsReq.Req.Unconfirmed.fBufferSize = len;
mcpsReq.Req.Unconfirmed.Datarate = (int8_t)dr;
}
else {
DEBUG("[semtech-loramac] MCPS request: confirmed TX\n");
mcpsReq.Type = MCPS_CONFIRMED;
mcpsReq.Req.Confirmed.fPort = mac->port;
mcpsReq.Req.Confirmed.fBuffer = payload;
mcpsReq.Req.Confirmed.fBufferSize = len;
mcpsReq.Req.Confirmed.NbTrials = 3;
mcpsReq.Req.Confirmed.Datarate = (int8_t)dr;
}
}
uint8_t req_status = LoRaMacMcpsRequest(&mcpsReq);
uint8_t ret = SEMTECH_LORAMAC_TX_ERROR;
switch (req_status) {
case LORAMAC_STATUS_OK:
DEBUG("[semtech-loramac] MCPS request: OK\n");
ret = SEMTECH_LORAMAC_TX_OK;
break;
case LORAMAC_STATUS_PARAMETER_INVALID:
DEBUG("[semtech-loramac] MCPS request: invalid parameter\n");
break;
case LORAMAC_STATUS_BUSY:
DEBUG("[semtech-loramac] MCPS request: busy\n");
ret = SEMTECH_LORAMAC_BUSY;
break;
case LORAMAC_STATUS_DUTYCYCLE_RESTRICTED:
DEBUG("[semtech-loramac] MCPS request: dutycycle restricted\n");
ret = SEMTECH_LORAMAC_DUTYCYCLE_RESTRICTED;
break;
default:
DEBUG("[semtech-loramac] MCPS request: unknown status %d\n",
req_status);
break;
}
return ret;
}
