CC1312R: stop entering inside txTaskFunction after sending 1000 byte during 4 minute

Hello All,

I have a custom board which based on cc1312R. I have RF_Buffer which has1000 byte length (one packet). I am transmitting this buffer to the receiver one time in every 8 second. Rf_buffer contains only fixed number.

I am able to send this buffer during around 4 minute. For one minute 7-8 packet,  totally I could send 28-30 packet. But after that there is no more transmission. Because The program doesnt enter inside txtaskfunction anymore.

parameters that I use in the code for tx_task is below.

#define TX_STACK_SIZE 1024

PAYLOAD_LENGTH = 1000

unsigned char RF_Buffer[PAYLOAD_LENGTH+2];

static Task_Params txTaskParams;
Task_Struct txTask;
static uint16_t txTaskStack[TX_STACK_SIZE];

void TxTask_init(PIN_Handle inPinHandle)
{
hPin = inPinHandle;

Task_Params_init(&txTaskParams);
txTaskParams.stackSize = TX_STACK_SIZE;
txTaskParams.priority = TX_PRIORITY;
txTaskParams.stack = &txTaskStack;
txTaskParams.arg0 = (UInt)2;

Task_construct(&txTask, txTaskFunction, &txTaskParams, NULL);
}

void txTaskFunction(UArg arg0, UArg arg1)
{
    uint16_t index_2;
    uint32_t RFtime;
    RF_Params rfParams;
    RF_Params_init(&rfParams);

    RF_cmdPropTxAdv.pktLen =  PAYLOAD_LENGTH+2;
    RF_cmdPropTxAdv.pPkt = RF_Buffer;
    RF_cmdPropTxAdv.startTrigger.triggerType = TRIG_ABSTIME;
    RF_cmdPropTxAdv.startTrigger.pastTrig = 1;

    if (!rfHandle){
        rfHandle = RF_open(&rfObject, &RF_prop, (RF_RadioSetup*)&RF_cmdPropRadioDivSetup, &rfParams);
        RF_postCmd(rfHandle, (RF_Op*)&RF_cmdFs, RF_PriorityNormal, NULL, 0);
    }
    RFtime = RF_getCurrentTime();

    while(1)
    {
        if(accel_time_flag == 1)
        {
            accel_time_flag = 0;

            RF_Buffer[1]=(uint8_t)(PAYLOAD_LENGTH >> 8);
            RF_Buffer[0]=(uint8_t)(PAYLOAD_LENGTH);

            for(index_2 = 2; index_2 < PAYLOAD_LENGTH+2; index_2 ++)
            {
                RF_Buffer[index_2] = index_2-2;
            }
            RF_Buffer[1000]='\r';
            RF_Buffer[1001]='\n';
            RFtime += PACKET_INTERVAL;
            RF_cmdPropTxAdv.startTime = RFtime;

            RF_EventMask result = RF_runCmd(rfHandle, (RF_Op*)&RF_cmdPropTxAdv, RF_PriorityNormal, NULL, 0);

            if (!(result & RF_EventLastCmdDone))
            {   while(1);}
            memset(RF_Buffer, 0, sizeof(RF_Buffer));
            PIN_setOutputValue(hPin, STA_LED,!PIN_getOutputValue(STA_LED));
        }
    }
}

What do you think about this problem? what can it block to enter inside txtaskfunction after 4 minute.

thank you 

BR

Bekir