void at86rfx_tal_tx_status_cb(uint8_t status)
{
if (status == AT86RFX_SUCCESS) {
/* LED indication for successful frame transmission. */
LED_Toggle(LED1);
udi_cdc_write_buf((const int *)&tx_buffer[1],
tx_buffer[0] - FCS_LEN);
tx_state = TX_IDLE;
} else if (status == AT86RFX_CHANNEL_ACCESS_FAILURE) {
/*
* Channel access failure is the only transmission failure that is handled
* within this application.
*
* In case of channel access failure the frame is retransmitted
*/
at86rfx_tx_frame(tx_buffer);
} else {
/*
* Other transmission status codes are not handled
* within this application.
* The transmission is considered as been completed for this frame.
*/
tx_state = TX_IDLE;
}
}
static void app_task(void)
{
if (tx_state == TX_IDLE) {
/* If bytes are received via USB, transmit the bytes. */
if (usb_rx_buff_len > 0) {
tx_state = TX_ONGOING;
/* Introducing critical section to avoid buffer corruption. */
cpu_irq_disable();
/* Check for maximum allowed frame length as per IEEE 802.15.4. */
if (usb_rx_buff_len > (PHY_MAX_LENGTH - FCS_LEN)) {
usb_rx_buff_len = PHY_MAX_LENGTH - FCS_LEN;
}
/* Update ppdu length within frame. */
tx_buffer[0] = usb_rx_buff_len + FCS_LEN;
/*
* Copy PSDU (actual PHY payload) into frame.
* Length of frame has to be first byte during transmission.
*/
memcpy(&tx_buffer[1], usb_rx_buffer, usb_rx_buff_len);
usb_rx_buff_len = 0;
cpu_irq_enable();
/* AT86RFx API to transmit the frame. */
at86rfx_tx_frame(tx_buffer);
}
}
}
/**
* \brief Test the frame transmission on AT86RFx module
*
* This function will form a frame with length followed by payload.
* Then call the \ref at86rfx_tx_frame for frame transmission
* \ref at86rfx_tal_tx_status_cb gives the status of this transmission
*
* \param test Current test case.
*/
static void run_at86rfx_tx_test(const struct test_case *test)
{
/* Buffer to hold frame to be transmitted. */
uint8_t tx_buffer[20] = " Test frame";
/* FCS length has to be added to length. */
tx_buffer[0] = sizeof(" Test frame") + FCS_LEN;
temp_test = (struct test_case *)test;
/* AT86RFx API to transmit the frame. */
at86rfx_tx_frame(tx_buffer);
}
