AWR2243: Issue with setting chirp config using dfp for AWR2243 with external MCU.

Ashish Basireddy

Prodigy 10 points

Part Number: AWR2243

Hello all,

I am trying to set chirp config using dfp.

1) set chirp config using MMWL_chirpConfig

2) call MMWL_readChirpConfig to below config

3) frame config is also provided below.

4) num_tx =3 and num_rx = 4

We still observe only one chirp. Can you guys help with what the issue could be?

void MMWL_readChirpConfig(rlChirpCfg_t *chirpCfgArgs, int chirpCfgCnt)

{

chirpCfgArgs->chirpStartIdx = 0;

chirpCfgArgs->chirpEndIdx = 0;

chirpCfgArgs->profileId = 0;

chirpCfgArgs->startFreqVar = 0;//*53.644Hz

chirpCfgArgs->freqSlopeVar = 0;//*48.279KHz/uS

chirpCfgArgs->idleTimeVar = 0;//*10ns

chirpCfgArgs->adcStartTimeVar = 1000;//*10ns

chirpCfgArgs->txEnable = 1;

chirpCfgArgs++;

chirpCfgArgs->chirpStartIdx =1;

chirpCfgArgs->chirpEndIdx = 1;

chirpCfgArgs->profileId = 0;

chirpCfgArgs->startFreqVar = 0;//*53.644Hz

chirpCfgArgs->freqSlopeVar = 0;//*48.279KHz/uS

chirpCfgArgs->idleTimeVar = 0;//*10ns

chirpCfgArgs->adcStartTimeVar = 1000;//*10ns

chirpCfgArgs->txEnable = 2;

chirpCfgArgs++;

}

void MMWL_readFrameConfig(rlFrameCfg_t *frameCfgArgs)

{

frameCfgArgs->chirpStartIdx = 0;

frameCfgArgs->chirpEndIdx = 1;

frameCfgArgs->numFrames = 1;//infinite

frameCfgArgs->numLoops = 1;

frameCfgArgs->framePeriodicity = 1600000;//*5ns

frameCfgArgs->frameTriggerDelay = 0;//*5ns

frameCfgArgs->numAdcSamples = 512;

frameCfgArgs->triggerSelect = 1;//(Software API based triggering)

}

int MMWL_chirpConfig(unsigned char deviceMap)

{

int i, retVal = RL_RET_CODE_OK;

rlChirpCfg_t setChirpCfgArgs[2] = {0};

rlChirpCfg_t getChirpCfgArgs[MAX_GET_CHIRP_CONFIG_IDX+1] = {0};

/*read chirpCfgArgs from config file*/

MMWL_readChirpConfig(&setChirpCfgArgs[0], 2);

/* With this API we can configure max 512 chirp in one call */

retVal = rlSetChirpConfig(deviceMap, 2U, &setChirpCfgArgs[0U]);

/* read back Chirp configuration, to verify that setChirpConfig actually set to Device

@Note - This examples read back (10+1) num of chirp configuration for demonstration,

which user can raise to match with their requirement */

retVal = rlGetChirpConfig(deviceMap, setChirpCfgArgs[0].chirpStartIdx,

setChirpCfgArgs[0].chirpStartIdx + MAX_GET_CHIRP_CONFIG_IDX, &getChirpCfgArgs[0]);

if (retVal != RL_RET_CODE_OK)

{

printf("GetChirp Configuration failed for deviceMap %u with error %d \n\n",

deviceMap, retVal);

}

else

{

for (i=0; i <= MAX_GET_CHIRP_CONFIG_IDX; i++)

{

/* @Note- This check assumes that all chirp configs are configured by single setChirpCfgArgs[0] */

/* compare each chirpConfig parameters to lastly configured via rlDynChirpConfig API */

if ((getChirpCfgArgs[i].profileId != setChirpCfgArgs[0].profileId) || \

(getChirpCfgArgs[i].freqSlopeVar != setChirpCfgArgs[0].freqSlopeVar) || \

(getChirpCfgArgs[i].txEnable != setChirpCfgArgs[0].txEnable) || \

(getChirpCfgArgs[i].startFreqVar != setChirpCfgArgs[0].startFreqVar) || \

(getChirpCfgArgs[i].idleTimeVar != setChirpCfgArgs[0].idleTimeVar) || \

(getChirpCfgArgs[i].adcStartTimeVar != setChirpCfgArgs[0].adcStartTimeVar))

{

break;}

}

return retVal;

}

over 2 years ago

0 Cesar over 2 years ago

TI__Guru*** 148804 points

Hi,

Do you see one chirp or one frame?

Please note that in the current frameCfg configuration, there is only 1 frame triggered. In order to trigger infinite frames, we need numFrames = 0

Ashish Basireddy said:
frameCfgArgs->numFrames = 1;//infinite

Thank you

Cesar

0 Ashish Basireddy over 2 years ago in reply to Cesar

Prodigy 10 points

I see one chirp for 1 frame ceaser . Ideally I was hoping to see two chirps. chirp1 => tx1 and chirp 2 => tx2.

plzz ignore //infinite

0 Cesar over 1 year ago in reply to Ashish Basireddy

TI__Guru*** 148804 points

Hi,

The chirp and frame configurations look correct

What is the profile configuration used?

How do you know that you are receiving only one chirp?

I think the issue may be either in the CSI connection or the host receiving the data

thank you

Cesar

0 Ashish Basireddy over 1 year ago in reply to Cesar

Prodigy 10 points

Thanks Ceasar for getting back,

Below are the observations.

1) The size of the data received is equivalent to one chirp size. Checked on the host receiving data using Wireshark and see bytes equivalent to single chirp.

2) Interestingly when we change the num_loops parameter in frame config, we see more chirps corresponding to single Tx. For example:

In this below case we see that Radar transmits only single chirp.

void MMWL_readChirpConfig(rlChirpCfg_t *chirpCfgArgs, int chirpCfgCnt)

{

chirpCfgArgs->chirpStartIdx = 0;

chirpCfgArgs->chirpEndIdx = 32;

chirpCfgArgs->profileId = 0;

chirpCfgArgs->startFreqVar = 0;//*53.644Hz

chirpCfgArgs->freqSlopeVar = 0;//*48.279KHz/uS

chirpCfgArgs->idleTimeVar = 0;//*10ns

chirpCfgArgs->adcStartTimeVar = 1000;//*10ns

chirpCfgArgs->txEnable = 1;

chirpCfgArgs++; }

void MMWL_readFrameConfig(rlFrameCfg_t *frameCfgArgs)

{

frameCfgArgs->chirpStartIdx = 0;

frameCfgArgs->chirpEndIdx = 32;

frameCfgArgs->numFrames = 1;//infinite

frameCfgArgs->numLoops = 1;

frameCfgArgs->framePeriodicity = 1600000;//*5ns

frameCfgArgs->frameTriggerDelay = 0;//*5ns

frameCfgArgs->numAdcSamples = 512;

frameCfgArgs->triggerSelect = 1;//(Software API based triggering)

}

int MMWL_chirpConfig(unsigned char deviceMap)

{

int i, retVal = RL_RET_CODE_OK;

rlChirpCfg_t setChirpCfgArgs[1] = {0};

rlChirpCfg_t getChirpCfgArgs[MAX_GET_CHIRP_CONFIG_IDX+1] = {0};

/*read chirpCfgArgs from config file*/

MMWL_readChirpConfig(&setChirpCfgArgs[0], 1);

/* With this API we can configure max 512 chirp in one call */

retVal = rlSetChirpConfig(deviceMap, 1U, &setChirpCfgArgs[0U]);

However, when I change the config to a different parameter as below, I see all the chirps being transmitted. Any problem you see in the above config?

For some reason the chirp config is not taking affect using the setchirp API.

void MMWL_readChirpConfig(rlChirpCfg_t *chirpCfgArgs, int chirpCfgCnt)

{

chirpCfgArgs->chirpStartIdx = 0;

chirpCfgArgs->chirpEndIdx = 0;

chirpCfgArgs->profileId = 0;

chirpCfgArgs->startFreqVar = 0;//*53.644Hz

chirpCfgArgs->freqSlopeVar = 0;//*48.279KHz/uS

chirpCfgArgs->idleTimeVar = 0;//*10ns

chirpCfgArgs->adcStartTimeVar = 1000;//*10ns

chirpCfgArgs->txEnable = 1;

chirpCfgArgs++; }

void MMWL_readFrameConfig(rlFrameCfg_t *frameCfgArgs)

{

frameCfgArgs->chirpStartIdx = 0;

frameCfgArgs->chirpEndIdx = 0;

frameCfgArgs->numFrames = 1;//infinite

frameCfgArgs->numLoops = 32;

frameCfgArgs->framePeriodicity = 1600000;//*5ns

frameCfgArgs->frameTriggerDelay = 0;//*5ns

frameCfgArgs->numAdcSamples = 512;

frameCfgArgs->triggerSelect = 1;//(Software API based triggering)

}

int MMWL_chirpConfig(unsigned char deviceMap)

{

int i, retVal = RL_RET_CODE_OK;

rlChirpCfg_t setChirpCfgArgs[1] = {0};

rlChirpCfg_t getChirpCfgArgs[MAX_GET_CHIRP_CONFIG_IDX+1] = {0};

/*read chirpCfgArgs from config file*/

MMWL_readChirpConfig(&setChirpCfgArgs[0], 1);

/* With this API we can configure max 512 chirp in one call */

retVal = rlSetChirpConfig(deviceMap, 1U, &setChirpCfgArgs[0U]);

0 Cesar over 1 year ago in reply to Ashish Basireddy

TI__Guru*** 148804 points

I think the issue is that you are sending chirps which have not been defined.

The following code a frame with following structure (C0, C1, C2, C3, C4...C32) 33 chirps. However the MMWL_chirpConfig() has only initialized 1 chirp, C0

frameCfgArgs->chirpStartIdx = 0;

frameCfgArgs->chirpEndIdx = 32;

frameCfgArgs->numFrames = 1;//infinite

frameCfgArgs->numLoops = 1

The following code will create a frame with following structure (C0, C0, C0, C0, C0...) 33 chirps of type C0, So this will work because C0 is initialized

frameCfgArgs->chirpStartIdx = 0;

frameCfgArgs->chirpEndIdx = 0;

frameCfgArgs->numFrames = 1;//infinite

frameCfgArgs->numLoops = 32

Thank you

Cesar

Sensors

Sensors forum

AWR2243: Issue with setting chirp config using dfp for AWR2243 with external MCU.