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AWR6843AOP: Unable to read GPADC values from MSS subsystem

Part Number: AWR6843AOP

Hello Champs!!!

I am stuck in an issue. 

I have followed the mmwave_sdk_03_05_00_04\packages\ti\control\mmwavelink\test for GPADC configuration. But have encountered a problem.

int32_t MmwaveLink_setGpAdcConfig (void)
{
int32_t retVal;

/* Set GPADC configuration */
retVal = rlSetGpAdcConfig(RL_DEVICE_MAP_INTERNAL_BSS, (rlGpAdcCfg_t*)&gpAdcCfg);

/* Check for mmWaveLink API call status */
if(retVal != 0)
{
/* Error: Link reported an issue. */
SBL_printf("Error: rlSetGpAdcConfig retVal=%d\n", retVal);  <------ I am getting retVal value here as 5
return -1;
}

SBL_printf("Debug: Finished rlSetGpAdcConfig\n");

while(isGetGpAdcMeasData == 0U)
{
/* Sleep and poll again: */
Task_sleep(1);
}
return 0;
}

Could someone tell me, what could be the issue here?

and suggest some solutions to it?

Thanks in advance.