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drivers: ieee802154: rf2xx: Fix missing auto ACKs

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The RF2XX driver not always sent ACK when a RX frame requests. This
happen because RF2XX transceiver asserts TRX_END interrupt after
confirm that the FCS is valid. The driver can now decode the frame
but in parallel the radio still processing the ACK frame. This will
sync the radio FSM state to ensure that ACK will be send.

Fixes #21659

Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>
This commit is contained in:
Gerson Fernando Budke 2020-01-07 18:48:16 -02:00 • committed by Anas Nashif
commit dbc1e717aa
1 changed files with 8 additions and 0 deletions
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8
drivers/ieee802154/ieee802154_rf2xx.c
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@ -211,6 +211,14 @@ static void rf2xx_thread_main(void *arg)
k_timer_start(&ctx->trx_isr_timeout, K_MSEC(10), 0);
} else if (isr_status & (1 << RF2XX_TRX_END)) {
if (ctx->trx_state == RF2XX_TRX_PHY_BUSY_RX) {
/* Ensures that automatically ACK will be sent
* when requested
*/
while (rf2xx_iface_reg_read(dev,
RF2XX_TRX_STATUS_REG) ==
RF2XX_TRX_PHY_STATUS_BUSY_RX_AACK) {
};
/* Set PLL_ON to avoid transceiver receive
* new data until finish reading process
*/