AWR6843: AWR6843 Level Sensing Lab: Debugging FFT Expansion and Chirp Limit Issues

Hello, I have a problem with the Level_Sensing laboratory using awr6843, the maximum number of FFT points supported by the routine of the original Level_Sensing laboratory is 512 points, I expanded the L2 memory to support FFT of 2048 points, after adjusting as follows:

#define SOC_XWR16XX_DSS_L2_BUFF_SIZE              0x11000U

#define SOC_XWR16XX_DSS_L2_SCRATCH_SIZE           0x8000U

The configuration parameters I used are as follows:

dfeDataOutputMode  1

channelCfg  1 1 0

adcCfg  2 2

adcbufCfg  0 1 1 1

profileCfg  0 77 400 7 114.4 0 0 33.71 1 2048 25000 0 0 52

chirpCfg  0 0 0 0 0 0 0 1

frameCfg  0 0 255 0 1000 1 0

lowPower  0 0

guiMonitor  1 1 0 0 0 1

RangeLimitCfg  2 1 1.0 3.0

sensorStart

The following error message is returned in debug mode:

{module#8}: "../dss/dss_main.c", line 200: error {id:0x10000, args:[0x816ea4, 0x816ea4]}

xdc.runtime.Error.raise: terminating execution

[Cortex_R4_0] xdc.runtime.Main: "../mss/mss_main.c", line 990: assertion failure

xdc.runtime.Error.raise: terminating execution

The error message on line 200 of DSS points to the following code:

    /* Check if previous chirp processing has completed*/

    DebugP_assert(gMmwDssMCB.dataPathObj.interFrameProcToken == 0);

gMmwDssMCB.dataPathObj.interFrameProcToken++;

The error message on line 990of MSS points to the following code:

         * BSS event:: CPU fault

        if(event & MMWDEMO_BSS_CPUFAULT_EVT)

        {

            DebugP_assert(0);

            break;

        }

But the processing time I provided should be completely enough for the last chirp to complete the processing, what is the problem?

If I want to break the limit that numChirpsPerFrame can only be set to a maximum of 255, how should I do it?

By the way, the configuration parameters work normally when the FFT number is 1024 points.