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drivers/cc2538_rf: don't poll internal FSM state

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This commit is contained in:
Jose Alamos 2021-08-09 11:39:00 +02:00
parent 3fce21a62b
commit a6d0052ff0
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GPG Key ID: F483EB800EF89DD9
1 changed files with 30 additions and 27 deletions
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57
cpu/cc2538/radio/cc2538_rf_radio_ops.c
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@ -36,6 +36,9 @@ ieee802154_dev_t cc2538_rf_dev = {
.driver = &cc2538_rf_ops,
};
static bool cc2538_tx_busy; /**< used to indicate TX chain is busy */
static bool cc2538_rx_busy; /**< used to indicate RX chain is busy */
static uint8_t cc2538_min_be = CONFIG_IEEE802154_DEFAULT_CSMA_CA_MIN_BE;
static uint8_t cc2538_max_be = CONFIG_IEEE802154_DEFAULT_CSMA_CA_MAX_BE;
static int cc2538_csma_ca_retries = CONFIG_IEEE802154_DEFAULT_CSMA_CA_RETRIES;
@ -44,8 +47,6 @@ static bool cc2538_cca_status; /**< status of the last CCA request */
static bool cc2538_cca; /**< used to check whether the last CCA result
corresponds to a CCA request or send with
CSMA-CA */
static bool cc2538_sfd_listen; /**< used to check whether we should ignore
the SFD flag */
static int _write(ieee802154_dev_t *dev, const iolist_t *iolist)
{
@ -91,6 +92,7 @@ static int _request_transmit(ieee802154_dev_t *dev)
{
(void) dev;
cc2538_tx_busy = true;
if (cc2538_csma_ca_retries < 0) {
RFCORE_SFR_RFST = ISTXON;
/* The CPU Ctrl mask is used here to indicate whether the radio is being
@ -220,7 +222,6 @@ static int _read(ieee802154_dev_t *dev, void *buf, size_t size, ieee802154_rx_in
res = 0;
}
return res;
}
@ -297,12 +298,7 @@ static int _request_set_trx_state(ieee802154_dev_t *dev, ieee802154_trx_state_t
{
(void) dev;
bool wait_sfd =
RFCORE->XREG_FSMSTAT0bits.FSM_FFCTRL_STATE >= CC2538_STATE_SFD_WAIT_RANGE_MIN
&& RFCORE->XREG_FSMSTAT0bits.FSM_FFCTRL_STATE <= CC2538_STATE_SFD_WAIT_RANGE_MAX;
if ((RFCORE->XREG_FSMSTAT1bits.RX_ACTIVE && !wait_sfd) ||
RFCORE->XREG_FSMSTAT1bits.TX_ACTIVE) {
if (cc2538_tx_busy || cc2538_rx_busy) {
return -EBUSY;
}
@ -333,47 +329,54 @@ void cc2538_irq_handler(void)
RFCORE_SFR_RFIRQF0 = 0;
RFCORE_SFR_RFIRQF1 = 0;
if ((flags_f0 & SFD) && cc2538_sfd_listen) {
if (RFCORE->XREG_FSMSTAT1bits.TX_ACTIVE) {
if ((flags_f0 & SFD)) {
/* If the radio already transmitted, this SFD is the TX_START event */
if (cc2538_tx_busy) {
cc2538_rf_dev.cb(&cc2538_rf_dev, IEEE802154_RADIO_INDICATION_TX_START);
}
/* If the RX chain was not busy, the detected SFD corresponds to a new
* incoming frame. Note the automatic ACK frame also triggers this event.
* Therefore, we use this variable to distinguish them. */
else if (!cc2538_rx_busy){
cc2538_rx_busy = true;
cc2538_rf_dev.cb(&cc2538_rf_dev, IEEE802154_RADIO_INDICATION_RX_START);
}
}
if (flags_f1 & TXDONE) {
/* TXDONE marks the end of the TX chain. The radio is not busy anymore */
cc2538_tx_busy = false;
cc2538_rf_dev.cb(&cc2538_rf_dev, IEEE802154_RADIO_CONFIRM_TX_DONE);
}
if ((flags_f0 & SFD) && cc2538_sfd_listen) {
if (RFCORE->XREG_FSMSTAT1bits.RX_ACTIVE) {
cc2538_rf_dev.cb(&cc2538_rf_dev, IEEE802154_RADIO_INDICATION_RX_START);
}
}
if (flags_f0 & RXPKTDONE) {
/* CRC check */
uint8_t pkt_len = rfcore_peek_rx_fifo(0);
if (rfcore_peek_rx_fifo(pkt_len) & CC2538_CRC_BIT_MASK) {
/* Disable RX while the frame has not been processed */
RFCORE_XREG_RXMASKCLR = 0xFF;
/* If AUTOACK is enabled and the ACK request bit is set */
if (!IS_ACTIVE(CONFIG_IEEE802154_AUTO_ACK_DISABLE) &&
(rfcore_peek_rx_fifo(1) & IEEE802154_FCF_ACK_REQ)) {
/* The next SFD will be the ACK's, ignore it */
cc2538_sfd_listen = false;
/* If AUTOACK is disabled or the ACK request bit is not set */
if (IS_ACTIVE(CONFIG_IEEE802154_AUTO_ACK_DISABLE) ||
(!(rfcore_peek_rx_fifo(1) & IEEE802154_FCF_ACK_REQ))) {
/* The radio won't send an ACK. Therefore the RX chain is not
* busy anymore
*/
cc2538_rx_busy = false;
}
cc2538_rf_dev.cb(&cc2538_rf_dev, IEEE802154_RADIO_INDICATION_RX_DONE);
}
else {
/* Disable RX while the frame has not been processed */
RFCORE_XREG_RXMASKCLR = 0xFF;
/* CRC failed; discard packet */
/* CRC failed; discard packet. The RX chain is not busy anymore */
cc2538_rx_busy = false;
cc2538_rf_dev.cb(&cc2538_rf_dev, IEEE802154_RADIO_INDICATION_CRC_ERROR);
}
}
/* Re-Enable SFD ISR after ACK is received */
/* The RX chain is not busy anymore on TXACKDONE event */
if (flags_f1 & TXACKDONE) {
cc2538_sfd_listen = true;
cc2538_rx_busy = false;
}
/* Check if the interrupt was triggered because the CSP finished its routine
@ -387,6 +390,8 @@ void cc2538_irq_handler(void)
RFCORE_SFR_RFST = ISTXON;
}
else {
/* In case of CCA failure the TX chain is not busy anymore */
cc2538_tx_busy = false;
cc2538_rf_dev.cb(&cc2538_rf_dev, IEEE802154_RADIO_CONFIRM_TX_DONE);
}
}
@ -463,8 +468,6 @@ static int _request_on(ieee802154_dev_t *dev)
{
(void) dev;
/* TODO */
/* when turned on listen for SFD interrupts */
cc2538_sfd_listen = true;
return 0;
}