/**
* \brief Starts software-controlled CSMA.
*/
static void csma_start(void)
{
/* Initialize CSMA variables */
NB = 0;
BE = tal_pib.MinBE;
/* Start backoff timer to trigger CCA */
start_backoff();
}
/**
* @brief Continues CSMA; handles next CSMA retry.
*
* @param trx_id Transceiver identifier
*/
void csma_continue(trx_id_t trx_id)
{
NB[trx_id]++;
if (NB[trx_id] > tal_pib[trx_id].MaxCSMABackoffs) {
tx_done_handling(trx_id, MAC_CHANNEL_ACCESS_FAILURE);
} else {
BE[trx_id]++;
if (BE[trx_id] > tal_pib[trx_id].MaxBE) {
BE[trx_id] = tal_pib[trx_id].MaxBE;
}
/* Start backoff timer to trigger CCA */
start_backoff(trx_id);
}
}
/*
* \brief Continues CSMA; handles next CSMA retry.
*/
void csma_continue(void)
{
NB++;
if (NB > tal_pib.MaxCSMABackoffs) {
trx_trac_status = TRAC_CHANNEL_ACCESS_FAILURE;
tal_state = TAL_TX_DONE;
set_trx_state(CMD_RX_AACK_ON);
} else {
BE++;
if (BE > tal_pib.MaxBE) {
BE = tal_pib.MaxBE;
}
/* Start backoff timer to trigger CCA */
start_backoff();
}
}
/**
* @brief Starts software-controlled CSMA.
*
* @param trx_id Transceiver identifier
*/
void csma_start(trx_id_t trx_id)
{
/* Initialize CSMA variables */
NB[trx_id] = 0;
BE[trx_id] = tal_pib[trx_id].MinBE;
if (BE[trx_id] == 0) {
/* Collision avoidance is disabled during first iteration */
#ifdef SUPPORT_MODE_SWITCH
if (tal_pib[trx_id].ModeSwitchEnabled) {
tx_ms_ppdu(trx_id);
} else
#endif
{
transmit_frame(trx_id, NO_CCA);
}
} else {
/* Start backoff timer to trigger CCA */
start_backoff(trx_id);
}
}
