CC1310: EasyLink_transmitCcaAsync with ACK implementation issue

Rodrigo Ladeira

Part Number: CC1310
Other Parts Discussed in Thread: SYSBIOS

Hi everybody!

In my application I start with the example rfWasConcentrator and rfWsnNode with Easylink.

I modify the example to use EasyLink_transmitCcaAsync in my application. But after few successful transmition the code stuck in

ti_sysbios_family_arm_m3_Hwi_excHandler__I)

I am using the SimpleLink SDK 4.10.1.01 . My code is below.

static void sendAgesCompletePacket(struct AgesSensorCompletePacket sensorPacket, uint8_t maxNumberOfRetries, uint32_t ackTimeoutMs)
{
    /* Set destination address in EasyLink API */
    currentRadioOperation.easyLinkTxPacket.dstAddr[0] = RADIO_CONCENTRATOR_ADDRESS;
    
    currentRadioOperation.easyLinkTxPacket.payload[0] = agesSensorC.header.sourceAddress;
    currentRadioOperation.easyLinkTxPacket.payload[1] = agesSensorC.header.packetType;
    currentRadioOperation.easyLinkTxPacket.payload[2] = agesSensorC.id_monitor;
    currentRadioOperation.easyLinkTxPacket.payload[3] = agesSensorC.status;
    currentRadioOperation.easyLinkTxPacket.payload[4] = (agesSensorC.pulse & 0xFF00) >> 8;
    currentRadioOperation.easyLinkTxPacket.payload[5] = (agesSensorC.pulse & 0xFF);
    currentRadioOperation.easyLinkTxPacket.payload[6] = agesSensorC.bat;
    currentRadioOperation.easyLinkTxPacket.payload[7] = (agesSensorC.life & 0xFF00) >> 8;
    currentRadioOperation.easyLinkTxPacket.payload[8] = (agesSensorC.life & 0xFF);

    currentRadioOperation.easyLinkTxPacket.len = sizeof(struct AgesSensorCompletePacket);

    /* Setup retries */
    currentRadioOperation.maxNumberOfRetries = maxNumberOfRetries;
    currentRadioOperation.ackTimeoutMs = ackTimeoutMs;
    currentRadioOperation.retriesDone = 0;
    EasyLink_setCtrl(EasyLink_Ctrl_AsyncRx_TimeOut, EasyLink_ms_To_RadioTime(ackTimeoutMs));


    /* Send packet  */
       EasyLink_transmitCcaAsync(&currentRadioOperation.easyLinkTxPacket, lbtDoneCb);
       Semaphore_pend(lbtDoneSem, BIOS_WAIT_FOREVER);
}

void lbtDoneCb(EasyLink_Status status)
{
    if (status == EasyLink_Status_Success)
    {     
        EasyLink_receiveAsync(rxDoneCallback, 0);

    }
    else if (status == EasyLink_Status_Busy_Error)
    {       
        Event_post(radioOperationEventHandle, RADIO_EVENT_ACK_TIMEOUT);
    }
    else
    {       
        Event_post(radioOperationEventHandle, RADIO_EVENT_ACK_TIMEOUT);
    }

    Semaphore_post(lbtDoneSem);
}

static void rxDoneCallback(EasyLink_RxPacket * rxPacket, EasyLink_Status status)
{
    struct PacketHeader* packetHeader;
    
   
    if (status == EasyLink_Status_Success)
    {
        /* Check the payload header */
        packetHeader = (struct PacketHeader*)rxPacket->payload;

        /* Check if this is an ACK packet */
        if (packetHeader->packetType == RADIO_PACKET_TYPE_ACK_PACKET)
        {
            /* Signal ACK packet received */
            Event_post(radioOperationEventHandle, RADIO_EVENT_DATA_ACK_RECEIVED);
        }
        else
        {            
            Event_post(radioOperationEventHandle, RADIO_EVENT_ACK_TIMEOUT);
        }
    }
    /* did the Rx timeout */
    else if(status == EasyLink_Status_Rx_Timeout)
    {
        /* Post a RADIO_EVENT_ACK_TIMEOUT event */
        Event_post(radioOperationEventHandle, RADIO_EVENT_ACK_TIMEOUT);
    }
    else
    {
        /* The Ack reception may have been corrupted causing an error.
         * Treat this as a timeout
         */
        Event_post(radioOperationEventHandle, RADIO_EVENT_ACK_TIMEOUT);

    }  
}

over 4 years ago

0 Marie H over 4 years ago

TI__Guru* 82271 points

Hi Rodrigo,

Can you use the below guide to get some more information on the hardware exception?

0 Rodrigo Ladeira over 4 years ago in reply to Marie H

Intellectual 360 points

Hi Marie !!!

Thank you for your replay!!!

I followed the steps to debug to get what is causing the Hwi exception.

But I have already test with 3 different nodes for one hour each and no exception has occurs.

Here is the ROS screen

0 Rodrigo Ladeira over 4 years ago in reply to Rodrigo Ladeira

Intellectual 360 points

0 Rodrigo Ladeira over 4 years ago in reply to Rodrigo Ladeira

Intellectual 360 points

Hi Marie!!!!!

After a long time debugging... the exception has ocurred.

This function HalTRNG_GetTRNG is from the LBT example. I am sharing the function:

uint32_t HalTRNG_GetTRNG( void )
{
    uint32_t trngVal;

    // initialize and enable TRNG if TRNG is not enabled
    if (0 == (HWREG(TRNG_BASE + TRNG_O_CTL) & TRNG_CTL_TRNG_EN))
    {
      HalTRNG_InitTRNG();
    }

    // check that a valid value is ready
    while(!(TRNGStatusGet() & TRNG_NUMBER_READY));

    // check to be sure we're not getting the same value repeatedly
    if ( (trngVal = TRNGNumberGet(TRNG_LOW_WORD)) == lastTrngVal )
    {
      return( 0xDEADBEEF );
    }
    else // value changed!
    {
      // so save last TRNG value
      lastTrngVal = trngVal;

      return( trngVal );
    }
}

This function is used for a clear channel assessment:

// Change the RNG function used for clear channel assessment
easyLink_params.pGrnFxn = (EasyLink_GetRandomNumber)HalTRNG_GetTRNG;

I did not realise why the exception fault has occur and how to resolve the problem.

0 TER over 4 years ago in reply to Rodrigo Ladeira

TI__Guru**** 317180 points

These type of errors are often memory related-

Have you checked that your task stack is set large enough? If you use more memory than you have defined you can start accessing random positions in the memory.

0 Rodrigo Ladeira over 4 years ago in reply to TER

Intellectual 360 points

The stack size seems to be OK I allocate 1024 bytes and the peak is 496.

0 Siri over 4 years ago in reply to Rodrigo Ladeira

TI__Guru* 86241 points

Have you made sure that the True Random Number Generator is powered?

int main(void)
{
    /* Call driver init functions */
    Board_initGeneral();

    /* Set power dependency for the TRNG */
    Power_setDependency(PowerCC26XX_PERIPH_TRNG);

Siri

0 Rodrigo Ladeira over 4 years ago in reply to TER

Intellectual 360 points

Hi !!!

The issue was solved. The problem was the memory from the idlle task (512 Bytes) was not enough.

Thanks!!!!

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CC1310: EasyLink_transmitCcaAsync with ACK implementation issue