RF_cmdPropTx doesn't run with TRIG_ABSTIME trigger if trigger time is too close to current time, even with RF_cmdPropTx.startTrigger.pastTrig = 1;

Hi,

in the rtPacketTx example everything works when RF_cmdPropTx.startTime is incremented by PACKET_INTERVAL, 500ms.  But when interval gets smaller,  the operation fails. Here is the snipped of code from the CCS example project.

The only difference - the current time is read before the command is run, and the delay is set to 1000 RTC ticks (about 250us) instead of PACKET_INTERVAL (500ms).  At a longer dealy, say 3000 ticks, everything starts working.

Does anyone have an idea why?

Cheers!

while(1)

{

/* Create packet with incrementing sequence number and random payload */

packet[0] = (uint8_t)(seqNumber >> 8);

packet[1] = (uint8_t)(seqNumber++);

uint8_t i;

for (i = 2; i < PAYLOAD_LENGTH; i++)

{

packet[i] = rand();

}

time = RF_getCurrentTime();  // added by me

/* Set absolute TX time to utilize automatic power management */

time += 1000;  //PACKET_INTERVAL;   -  modified by me

RF_cmdPropTx.startTime = time;

/* Send packet */

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

if (!(result & RF_EventLastCmdDone))

{

/* Error */

while(1);

}

PIN_setOutputValue(pinHandle, Board_LED1,!PIN_getOutputValue(Board_LED1));

}