SMPL_TX_CCA_FAIL CC1200

Hi

The MRFI_Transmit function implements delays of the type MRFI_WaitTimeoutUsec etc. Have you checked that these delays are of the correct length after porting your code?

I looks like you have a timing problem since you get different results when stepping through your code compared to what you get when running it “real time”

Siri

Hi Siri
When I debug program step by step, the rc value return SMPL_SUCCESS, but when I just run it , the rc return SMPL_TX_CCA_FAIL.
1.first I think the delay is not enough, /* radio must be awake to transmit */
MRFI_ASSERT( mrfiRadioState != MRFI_RADIO_STATE_OFF );
/* Turn off reciever. We can ignore/drop incoming packets during transmit. */
Mrfi_RxModeOff(); MRFI_PrepareToTx( pPacket );
/* ------------------------------------------------------------------
* Immediate transmit * --------------------- */
if (txType == MRFI_TX_TYPE_FORCED) { //#ifdef NWK_PLL
// BSP_ENTER_CRITICAL_SECTION(s);//#endif
// MRFI_CompleteTxPrep( pPacket );#ifdef NWK_PLL do {
BSP_ENTER_CRITICAL_SECTION(s);
if( stx_active == false ) // if the channel was changed {
BSP_EXIT_CRITICAL_SECTION(s);
Mrfi_RxModeOff(); // turn off the radio
MRFI_PrepareToTx( pPacket ); // setup transmission again
continue; // restart the loop } MRFI_CompleteTxPrep( pPacket );
} while( 0 );#endif /* Issue the TX strobe. */
mrfiSpiCmdStrobe( STX );#ifdef NWK_PLL BSP_EXIT_CRITICAL_SECTION(s);
#endif /* Wait for transmit to complete */
Mrfi_DelayUsecLong( MRFI_MAX_TRANSMIT_TIME_us / 1000,
MRFI_MAX_TRANSMIT_TIME_us % 1000,
mrfi_TxImmediateDone );
/* Clear the interrupt flag */ MRFI_CLEAR_SYNC_PIN_INT_FLAG(); } else
{ /* ------------------------------------------------------------------
* CCA transmit * --------------- */
MRFI_ASSERT( txType == MRFI_TX_TYPE_CCA );
/* set number of CCA retries */ ccaRetries = MRFI_CCA_RETRIES;
/* For CCA algorithm, we need to know the transition from the RX state to
* the TX state. There is no need for SYNC signal in this logic. So we
* can re-configure the GDO_0 output from the radio to be PA_PD signal
* instead of the SYNC signal.
* Since both SYNC and PA_PD are used as falling edge interrupts, we
* don't need to reconfigure the MCU input. */
MRFI_CONFIG_GDO0_AS_PAPD_SIGNAL();
/* ===============================================================================
* Main Loop * ============= */ for (;;) {
/* Radio must be in RX mode for CCA to happen.
* Otherwise it will transmit without CCA happening. */
/* Can not use the Mrfi_RxModeOn() function here since it turns on the
* Rx interrupt, which we don't want in this case. */
mrfiSpiCmdStrobe( SRX );
Mrfi_DelayUsec(461); // calibaration time when moving from idle to RX/TX //<<<<<<<<<<<<<<<<<<<<<<<
/* wait for the rssi to be valid. */#ifdef MRFI_TIMER_ALWAYS_ACTIVE
MRFI_WaitTimeoutUsec(MRFI_RSSI_VALID_DELAY_US, Mrfi_ValidateRSSI);
#else // MRFI_TIMER_ALWAYS_ACTIVE MRFI_RSSI_VALID_WAIT();
#endif // MRFI_TIMER_ALWAYS_ACTIVE#ifdef NWK_PLL
BSP_ENTER_CRITICAL_SECTION(s);
if( stx_active == false ) // if the channel was changed {
BSP_EXIT_CRITICAL_SECTION(s);
Mrfi_RxModeOff(); // turn off the radio
MRFI_PrepareToTx( pPacket ); // setup transmission again
continue; // restart the cca loop }
MRFI_CompleteTxPrep( pPacket );#endif /*
* Clear the PA_PD pin interrupt flag. This flag, not the interrupt itself,
* is used to capture the transition that indicates a transmit was started.
* The pin level cannot be used to indicate transmit success as timing may
* prevent the transition from being detected. The interrupt latch captures
* the event regardless of timing. */
MRFI_CLEAR_PAPD_PIN_INT_FLAG(); /* Issue the TX strobe. */
mrfiSpiCmdStrobe( STX );#ifdef NWK_PLL BSP_EXIT_CRITICAL_SECTION(s);
#endif /* Delay long enough for the PA_PD signal to indicate a
* successful transmit. This is the 250 XOSC periods
* (9.6 us for a 26 MHz crystal) See section 19.6 of 2500 datasheet.
* Found out that we need a delay of atleast 20 us on CC2500 and
* 25 us on CC1100 to see the PA_PD signal change. */
Mrfi_DelayUsec(25);
/* PA_PD signal goes from HIGH to LOW when going from RX state.
* This transition is trapped as a falling edge interrupt flag
* to indicate that CCA passed and the transmit has started. */
if (MRFI_PAPD_INT_FLAG_IS_SET()) {
/* ------------------------------------------------------------------
* Clear Channel Assessment passed.
* ---------------------------------- */
/* Clear the PA_PD int flag */ MRFI_CLEAR_PAPD_PIN_INT_FLAG();
but I have no idea about where the delay length need change,also change to what size should be suitable.