/**@brief Callback on Gazell Receive Data Ready. Flushes the receive's FIFO.
*/
void nrf_gzll_host_rx_data_ready(uint32_t pipe, nrf_gzll_host_rx_info_t rx_info)
{
// We dont expect to receive any data in return, but if it happens we flush the RX fifo
bool gzll_call_ok = nrf_gzll_flush_rx_fifo(pipe);
if (!gzll_call_ok)
{
GET_GAZELL_ERROR();
}
}
static void gzll_rx_fifo_flush(void)
{
int i;
for(i = 0; i < NRF_GZLL_CONST_PIPE_COUNT; i++)
{
(void)nrf_gzll_flush_rx_fifo(i);
}
}
bool gzp_address_req_send()
{
//lint -save -e514 Unusual use of a Boolean expression (gzll_update_ok &= ...)
uint8_t i;
bool retval = false;
bool success;
uint8_t address_req[GZP_CMD_HOST_ADDRESS_REQ_PAYLOAD_LENGTH];
uint8_t rx_payload[NRF_GZLL_CONST_MAX_PAYLOAD_LENGTH];
uint32_t rx_payload_length = NRF_GZLL_CONST_MAX_PAYLOAD_LENGTH;
nrf_gzll_tx_power_t temp_power;
uint32_t temp_max_tx_attempts;
bool gzll_update_ok = true;
// Store parameters that are temporarily changed
temp_max_tx_attempts = nrf_gzll_get_max_tx_attempts();
temp_power = nrf_gzll_get_tx_power();
// Modify parameters
nrf_gzp_disable_gzll();
gzll_update_ok &= nrf_gzll_set_max_tx_attempts(GZP_REQ_TX_TIMEOUT);
gzll_update_ok &= nrf_gzll_set_tx_power(GZP_POWER);
// Flush RX FIFO
gzll_update_ok &= nrf_gzll_flush_rx_fifo(GZP_PAIRING_PIPE);
gzll_update_ok &= nrf_gzll_enable();
// Build "request" packet
address_req[0] = (uint8_t)GZP_CMD_HOST_ADDRESS_REQ;
// Send a number of packets in order to broadcast that devices not within
// close proximity must back off.
for(i = 0; i < GZP_MAX_BACKOFF_PACKETS; i++)
{
success = gzp_tx_packet(address_req, GZP_CMD_HOST_ADDRESS_REQ_PAYLOAD_LENGTH, GZP_PAIRING_PIPE);
if(success)
{
nrf_gzp_flush_rx_fifo(GZP_PAIRING_PIPE);
}
else
{
break;
}
}
gzp_delay_rx_periods(GZP_TX_ACK_WAIT_TIMEOUT);
// Send message for fetching pairing response from host.
address_req[0] = (uint8_t)GZP_CMD_HOST_ADDRESS_FETCH;
success = gzp_tx_packet(address_req, GZP_CMD_HOST_ADDRESS_REQ_PAYLOAD_LENGTH, GZP_PAIRING_PIPE);
if(success && latest_tx_info.payload_received_in_ack)
{
// If pairing response received
if(nrf_gzll_get_rx_fifo_packet_count(GZP_PAIRING_PIPE) > 0)
{
rx_payload_length = NRF_GZLL_CONST_MAX_PAYLOAD_LENGTH; //dummy placeholder
if(nrf_gzll_fetch_packet_from_rx_fifo(GZP_PAIRING_PIPE, rx_payload, &rx_payload_length))
{
if(rx_payload[0] == (uint8_t)GZP_CMD_HOST_ADDRESS_RESP)
{
memcpy(gzp_system_address, &rx_payload[GZP_CMD_HOST_ADDRESS_RESP_ADDRESS], GZP_SYSTEM_ADDRESS_WIDTH);
gzll_update_ok &= gzp_update_radio_params(&rx_payload[GZP_CMD_HOST_ADDRESS_RESP_ADDRESS]);
#ifndef GZP_NV_STORAGE_DISABLE
(void)gzp_params_store(false); // "False" indicates that only "system address" part of DB element will be stored
#endif
retval = true;
}
}
}
}
else
{
gzp_delay_rx_periods(GZP_NOT_PROXIMITY_BACKOFF_RX_TIMEOUT - GZP_TX_ACK_WAIT_TIMEOUT);
}
gzp_delay_rx_periods(GZP_STEP1_RX_TIMEOUT);
// Clean-up and restore parameters temporarily modified
nrf_gzp_disable_gzll();
gzll_update_ok &= nrf_gzll_flush_rx_fifo(GZP_PAIRING_PIPE);
gzll_update_ok &= nrf_gzll_flush_tx_fifo(GZP_PAIRING_PIPE);
gzll_update_ok &= nrf_gzll_set_max_tx_attempts(temp_max_tx_attempts);
gzll_update_ok &= nrf_gzll_set_tx_power(temp_power);
gzll_update_ok &= nrf_gzll_enable();
if(!gzll_update_ok)
{
/*
The update of the Gazell parameters failed. Use nrf_gzll_get_error_code()
to investigate the cause.
*/
}
return retval;
//lint -restore
}
