/*---------------------------------------------------------------------------*/
static int
spirit_radio_channel_clear(void)
{
float rssi_value;
/* Local variable used to memorize the SPIRIT1 state */
uint8_t spirit_state = ON;
PRINTF("CHANNEL CLEAR IN\n");
if(spirit_on == OFF) {
/* Wakes up the SPIRIT1 */
spirit_radio_on();
spirit_state = OFF;
}
/* */
IRQ_DISABLE();
spirit1_strobe(SPIRIT1_STROBE_SABORT);
/* SpiritCmdStrobeSabort();*/
SpiritIrqClearStatus();
IRQ_ENABLE();
{
rtimer_clock_t timeout = RTIMER_NOW() + 5 * RTIMER_SECOND/1000;
do {
SpiritRefreshStatus();
} while((g_xStatus.MC_STATE != MC_STATE_READY) && (RTIMER_NOW() < timeout));
if(RTIMER_NOW() < timeout) {
return 1;
}
}
/* Stores the RSSI value */
rssi_value = SpiritQiGetRssidBm();
/* Puts the SPIRIT1 in its previous state */
if(spirit_state==OFF) {
spirit_radio_off();
} else {
spirit1_strobe(SPIRIT1_STROBE_RX);
/* SpiritCmdStrobeRx();*/
BUSYWAIT_UNTIL(SPIRIT1_STATUS() == SPIRIT1_STATE_RX, 5 * RTIMER_SECOND/1000);
}
PRINTF("CHANNEL CLEAR OUT\n");
/* Checks the RSSI value with the threshold */
if(rssi_value<CCA_THRESHOLD) {
return 0;
} else {
return 1;
}
}
/**
* @brief This function handles the point-to-point packet reception
* @param uint8_t *RxFrameBuff = Pointer to ReceiveBuffer
* uint8_t cRxlen = length of ReceiveBuffer
* @retval None
*/
void AppliReceiveBuff(uint8_t *RxFrameBuff, uint8_t cRxlen)
{
uint8_t xIndex = 0;
uint8_t ledToggleCtr = 0;
/*float rRSSIValue = 0;*/
cmdFlag = RESET;
exitTime = SET;
exitCounter = TIME_TO_EXIT_RX;
pRadioDriver = &spirit_cb;
/* Spirit IRQs enable */
pRadioDriver->DisableIrq();
pRadioDriver->EnableRxIrq();
/* payload length config */
pRadioDriver->SetPayloadLen(PAYLOAD_LEN);
/* rx timeout config */
pRadioDriver->SetRxTimeout(1000);
/* IRQ registers blanking */
pRadioDriver->ClearIrqStatus();
SpiritIrqGetStatus(&xIrqStatus);
/* RX command */
pRadioDriver->StartRx();
uint32_t timeout = HAL_GetTick() + 5000;
/* wait for data received or timeout period occured */
while((RESET == xRxDoneFlag)&&(RESET == rx_timeout)&&(RESET == spirit_error) && (HAL_GetTick () < timeout));
if(rx_timeout==SET)
{
HAL_UART_Transmit(&huart1, "T ", 2, 1000);
rx_timeout = RESET;
}
else if(xRxDoneFlag)
{
xRxDoneFlag=RESET;
pRadioDriver->GetRxPacket(RxFrameBuff,&cRxlen);
int dbmValue= SpiritQiGetRssidBm();
sprintf(message, "R %d ", dbmValue);
/*rRSSIValue = Spirit1GetRssiTH();*/
HAL_UART_Transmit(&huart1, message, strlen(message), 1000);
xRxFrame.Cmd = RxFrameBuff[0];
xRxFrame.CmdLen = RxFrameBuff[1];
xRxFrame.Cmdtag = RxFrameBuff[2];
xRxFrame.CmdType = RxFrameBuff[3];
xRxFrame.DataLen = RxFrameBuff[4];
for (xIndex = 5; xIndex < cRxlen; xIndex++)
{
xRxFrame.DataBuff[xIndex] = RxFrameBuff[xIndex];
}
if(xRxFrame.Cmd == LED_TOGGLE)
{
RadioShieldLedOn(RADIO_SHIELD_LED);
HAL_Delay(DELAY_RX_LED_TOGGLE);
RadioShieldLedOff(RADIO_SHIELD_LED);
cmdFlag = SET;
}
if(xRxFrame.Cmd == ACK_OK)
{
for(; ledToggleCtr<5; ledToggleCtr++)
{
RadioShieldLedToggle(RADIO_SHIELD_LED);
HAL_Delay(DELAY_RX_LED_TOGGLE);
}
RadioShieldLedOff(RADIO_SHIELD_LED);
}
}
else if (spirit_error == SET)
{
spirit_error = RESET;
}
}
/**
* @brief this function sets the RSSI threshold
* @param int dbmValue
* @retval None
*/
float Spirit1GetRssiTH(void)
{
float dbmValue=0;
dbmValue = SpiritQiGetRssidBm();
return dbmValue;
}
