uint16_t calc_frame_transmit_duration(uint8_t *phy_frame)
{
uint8_t transaction_duration_octets;
uint16_t transaction_duration_sym;
/* number of octets */
transaction_duration_octets = (*phy_frame) + PHY_OVERHEAD;
/* Add interframe spacing - independent on ACK transmission. */
if (*phy_frame > aMaxSIFSFrameSize) {
transaction_duration_sym = macMinLIFSPeriod_def; /* symbols */
} else {
transaction_duration_sym = macMinSIFSPeriod_def; /* symbols */
}
/* If the frame requested an ACK, add ACK handling time. */
if (phy_frame[PL_POS_FCF_1] & FCF_ACK_REQUEST) {
/* Ensure there is room for the ACK. */
transaction_duration_octets += ACK_FRAME_LEN + PHY_OVERHEAD; /**
*
*octets
**/
/* Space is needed until the ACK is sent. */
transaction_duration_sym += aTurnaroundTime +
aUnitBackoffPeriod; /**
*
*symbols
**/
}
transaction_duration_sym += transaction_duration_octets *
SYMBOLS_PER_OCTET;
transaction_duration_sym = TAL_PSDU_US_PER_OCTET(
transaction_duration_sym);
return transaction_duration_sym;
}
/*
* \brief Implements the handling of the transmission end.
*
* This function handles the callback for the transmission end.
*/
void tx_done_handling(void)
{
tal_state = TAL_IDLE;
#if (defined BEACON_SUPPORT) || (defined ENABLE_TSTAMP)
/*
* The entire timestamp calculation is only required for beaconing
*networks
* or if timestamping is explicitly enabled.
*/
/* Calculate negative offset of timestamp */
uint16_t offset;
/* Calculate the tx time */
offset
= TAL_CONVERT_SYMBOLS_TO_US(
(PHY_OVERHEAD + LENGTH_FIELD_LEN) * SYMBOLS_PER_OCTET)
+ TAL_PSDU_US_PER_OCTET(*tal_frame_to_tx + FCS_LEN)
+ IRQ_PROCESSING_DLY_US;
if (mac_frame_ptr->mpdu[PL_POS_FCF_1] & FCF_ACK_REQUEST) {
/* Tx timestamp needs to be reduced by ACK duration etc. */
offset
+= TAL_CONVERT_SYMBOLS_TO_US(
(PHY_OVERHEAD +
LENGTH_FIELD_LEN) * SYMBOLS_PER_OCTET) +
TAL_PSDU_US_PER_OCTET(ACK_PAYLOAD_LEN +
FCS_LEN);
#ifdef HIGH_DATA_RATE_SUPPORT
if (tal_pib.CurrentPage == 0) {
offset += TAL_CONVERT_SYMBOLS_TO_US(aTurnaroundTime);
} else {
offset += 32;
}
#else
offset += TAL_CONVERT_SYMBOLS_TO_US(aTurnaroundTime);
#endif /* #ifdef HIGH_DATA_RATE_SUPPORT */
}
mac_frame_ptr->time_stamp -= offset;
#endif /* #if (defined BEACON_SUPPORT) || (defined ENABLE_TSTAMP) */
retval_t status;
switch (trx_trac_status) {
case TRAC_SUCCESS:
status = MAC_SUCCESS;
break;
case TRAC_SUCCESS_DATA_PENDING:
status = TAL_FRAME_PENDING;
break;
case TRAC_CHANNEL_ACCESS_FAILURE:
status = MAC_CHANNEL_ACCESS_FAILURE;
break;
case TRAC_NO_ACK:
status = MAC_NO_ACK;
break;
case TRAC_INVALID:
status = FAILURE;
break;
default:
Assert("Unexpected tal_tx_state" == 0);
status = FAILURE;
break;
}
tal_tx_frame_done_cb(status, mac_frame_ptr);
} /* tx_done_handling() */
/*
* \brief Implements the handling of the transmission end.
*
* This function handles the callback for the transmission end.
*/
void tx_done_handling(void)
{
tal_state = TAL_IDLE;
#if (defined BEACON_SUPPORT) || (defined ENABLE_TSTAMP)
#if (DISABLE_TSTAMP_IRQ == 0)
/*
* The Tx timestamp IRQ is enabled and provided via DIG2.
* The actual value is stored within trx_irq_timestamp_handler_cb();
* see file "tal_irq_handler.c".
* The value gets stored into the mac_frame_ptr structure during the
* tx end interrupt; see handle_tx_end_irq().
* So, here is nothing left to do.
*/
#else /* (DISABLE_TSTAMP_IRQ == 1) */
/*
* The entire timestamp calculation is only required for beaconing networks
* or if timestamping is explicitly enabled.
*/
/* Calculate negative offset of timestamp */
uint16_t offset;
/* Calculate the tx time */
offset =
TAL_CONVERT_SYMBOLS_TO_US((PHY_OVERHEAD + LENGTH_FIELD_LEN) * SYMBOLS_PER_OCTET)
+ TAL_PSDU_US_PER_OCTET(*tal_frame_to_tx + FCS_LEN)
+ TRX_IRQ_DELAY_US;
if (mac_frame_ptr->mpdu[PL_POS_FCF_1] & FCF_ACK_REQUEST)
{
/* Tx timestamp needs to be reduced by ACK duration etc. */
offset += TAL_CONVERT_SYMBOLS_TO_US((PHY_OVERHEAD + LENGTH_FIELD_LEN) * SYMBOLS_PER_OCTET) +
TAL_PSDU_US_PER_OCTET(ACK_PAYLOAD_LEN + FCS_LEN);
offset += TAL_CONVERT_SYMBOLS_TO_US(aTurnaroundTime);
}
mac_frame_ptr->time_stamp -= offset;
#endif /* #if (DISABLE_TSTAMP_IRQ == 0) */
#endif /* #if (defined BEACON_SUPPORT) || (defined ENABLE_TSTAMP) */
retval_t status;
switch (trx_trac_status)
{
case TRAC_SUCCESS:
status = MAC_SUCCESS;
break;
case TRAC_SUCCESS_DATA_PENDING:
status = TAL_FRAME_PENDING;
break;
case TRAC_CHANNEL_ACCESS_FAILURE:
status = MAC_CHANNEL_ACCESS_FAILURE;
break;
case TRAC_NO_ACK:
status = MAC_NO_ACK;
break;
case TRAC_INVALID:
status = FAILURE;
break;
default:
Assert("Unexpected tal_tx_state" == 0);
status = FAILURE;
break;
}
tal_tx_frame_done_cb(status, mac_frame_ptr);
} /* tx_done_handling() */