/**@brief Function for handling timeslots in a context with elevated priority.
*/
void QDEC_IRQHandler(void)
{
// This is called here instead of in the uesb_event_handler for two reasons:
// 1) Updating the uESB params shouldn't have to lag behind transmissions
// 2) m_tx_callback should not be run at RADIO_IRQHandler priority
syma_update((uint8_t*)&m_uesb_config.rf_channel,
(uint8_t*)&m_uesb_config.rx_address_p0[0],
(uint8_t*)&m_uesb_config.rf_addr_length,
(uint8_t*)&m_tx_payload.data[0],
(uint8_t*)&m_tx_payload.length);
m_uesb_config.payload_length = m_tx_payload.length;
if (UESB_SUCCESS != uesb_init((uesb_config_t*)&m_uesb_config))
{
app_error_handler(PROPRIETARY_RF_DEBUG,
__LINE__,
(const uint8_t*)__FILE__);
}
if(UESB_SUCCESS != uesb_write_tx_payload((uesb_payload_t*) &m_tx_payload))
{
app_error_handler(PROPRIETARY_RF_DEBUG,
__LINE__,
(const uint8_t*)__FILE__);
}
}
int send_data(uint8_t *data, int length)
{
for (int i = 0; i < length; ++i) {
tx_payload.data[i % 8] = data[i];
if (i > 0 && i % 8 == 0)
uesb_write_tx_payload(&tx_payload);
}
}
/**@brief IRQHandler used for execution context management.
* Any available handler can be used as we're not using the associated hardware.
* This handler is used to initiate UESB RX/TX
*/
void TIMESLOT_BEGIN_IRQHandler(void)
{
uesb_payload_t payload;
uint32_t payload_len;
uint32_t err_code;
uesb_init(&m_uesb_config);
// Packet transmission is syncrhonized to the beginning of timeslots
// Check FIFO for packets and transmit if not empty
if (m_transmit_fifo.free_items < sizeof(m_transmit_fifo.buf) && m_ut_state != UT_STATE_TX)
{
// There are packets in the FIFO: Start transmitting
payload_len = sizeof(payload);
// Copy packet from FIFO. Packet isn't removed until transmissions succeeds or max retries has been exceeded
if (m_tx_attempts < MAX_TX_ATTEMPTS)
{
fifo_peek_pkt(&m_transmit_fifo, (uint8_t *) &payload, &payload_len);
APP_ERROR_CHECK_BOOL(payload_len == sizeof(payload));
}
else
{
fifo_get_pkt(&m_transmit_fifo, (uint8_t *) &payload, &payload_len);
APP_ERROR_CHECK_BOOL(payload_len == sizeof(payload));
m_tx_attempts = 0;
}
if (m_ut_state == UT_STATE_RX)
{
uesb_stop_rx();
}
err_code = uesb_write_tx_payload(&payload);
APP_ERROR_CHECK(err_code);
m_ut_state = UT_STATE_TX;
}
else
{
// No packets in the FIFO: start reception
err_code = uesb_start_rx();
m_ut_state = UT_STATE_RX;
}
}