AWR2944EVM: Function of zero-insertion in HWA didn't work based on ES2.0

PS: the sdk version is mmwave_mcuplus_sdk_04_03_00_01

Hi,

Please give me some time to go over this and get back to you.

Regards,

Kaushik

Hi,

Need some additional info here.

• Have you tried directly writing the 11-bit number into the ZERO_INSERT_NUM register? This is a 32-bit register at 
  0x560624F8.
• Did you write into the DSS_HWA_DEROT_RAM using the function HWA_configRam() or did you write it directly into the memory? If so, can you share that part of the code snippet? 
• Were you able to achieve the intended zero insertion of 0x3FFF with ZERO_INSERT_ENABLE? 

Regards,

Kaushik

HI Kaushik

      Thanks for your reply,

a. we tried directly writing the 11-bit number into the ZERO_INSERT_NUM register, and we can write 11bit into this register.

b.Did you write into the DSS_HWA_DEROT_RAM using the function HWA_configRam() or did you write it directly into the memory? If so, can you share that part of the code snippet? 

the code snippet is shown as below

c Were you able to achieve the intended zero insertion of 0x3FFF with ZERO_INSERT_ENABLE? 

We achieved the intended zero insertion of 0x3FFF as shown in the code snippet, but it failed to work, and It works when we tested the same configuration in ES1.0

Regards,

Patrick

Hi Kaushik,

I don't have an ES2.0 EVM in my hand, but I quickly checked this problem on my ES1.0 EVM. The problem is the same as customer.

The highest two bits for each half word are always zero no matter what value you set in DSS_HWA_DEROT_RAM. In HWA data sheet, I found below words.

It said top-most two bits are not cared in DSS_HWA_DEROT_RAM, which matches current behavior. Could you check with design team which is correct definition of this RAM space?

Best regards,
Adam

Hi Patrick and Adam,

I've been able to see 0x3FFF upon writing in both ES1.0 and ES2.0. Will get back with an update from the design team.

Regards,

Kaushik

Hi Kaushik

       We use the same zero insert configuration in both ES1.0 and ES2.0, but inES1.0, HWA can work. in ES2.0 HWA can't work, once we disable zero insert func, HWA can work as normal, so we guess there are still some issue in zero insert function

       The test code and configuration is shown as below

Thanks

Patrick

Hi Patrick,

Can you confirm if the zero insert enable bit is disabled and that there is no conflict with CMULT mode 9? Also, please elaborate on what you mean by "HWA can't work".

Regards,

Kaushik

Hi Kaushik

    When we did the zero insert test, we hadn't used the CMULT MODE 9, but used the HWA_COMPLEX_MULTIPLY_MODE_VECTOR_MULT ram

    If we comment the configMask of  HWA_COMMONCONFIG_MASK_ZEROINSERT_NUM_MASK,and also config fftMode.preProcCfg.zeroInsertEn = HWA_FEATURE_BIT_DISABLE; HWA can work and process

    If we use zero insert func, HWA will not able to complete current paramset and trigger EDMA

Thanks

Patrick

Hi Patrick,

Can you perform the following experiments?

• Enable the zero insertion and set the num mask as 0
• Check the value of the MEM_ACCESS_ERR_STATUS
• Try with different masks and mask_num
• Use software trigger on a single paramset with the same zero insert config and see if the HWA paramset executes as intended.

The zero-insertion feature adds stall cycles which could affect your param timings and could exceed chirp times.

Regards,

Kaushik

Hi Kaushik

     We perform the experiments what you said, the results is shown as below, and found some problem:

     a. Enable the zero insertion and set the num mask as 0, and found HWA didn't work

     b. Check the value of the MEM_ACCESS_ERR_STATUS:

  c.   Try with different masks and mask_num

         We configured different group of mask and mask_num:

          zero insert enable, num =4； mask =0x0fff;  srcAcnt = 12-1  ;   HWA didn't work

          zero insert enable, num =4； mask =0xfff0;  srcAcnt = 12-1  ;   HWA  work

          zero insert enable, num =8； mask =0xf0f0;  srcAcnt = 8-1  ;    HWA work

          zero insert enable, num =8； mask =0xff00;  srcAcnt = 8-1  ;    HWA work

          zero insert enable, num =8； mask =0x0f0f;  srcAcnt = 8-1  ;  HWA  didn't work

          zero insert enable, num =8； mask =0x00ff;  srcAcnt = 8-1  ;  HWA  didn't work

Thanks

Patrick

Hi Kaushik,

       Thans for your information, but I don't quite understand what you mean, could you please help answer some question

       for first point: “ The MSB of the mask should always be set to 1 " ,

        a.The MSB is referring to uint16_t's  MSB or uint32_t's MSB? 

        b. Is this point only for ES2.1？ Because in ES2.0, we didn't set to 1 of the mask MSB, but it can run successfully. our mask is:0x08EF3710 ,others are zero.

        c. Does the MSB of mask will also occupy one input?

      for second point "The mask number should always match the total number of bits set to 0 in the mask (within ACNT limits) else the operation can't be guaranteed"

       In my understanding, the mask number is the number of zeros to be inserted, and the mask bit-field of '0' inserts a zero at location based on bit-field index. "1" means the input is passed through, so we only need to ensure the number of "1" in mask is same as acnt, Is this correct?

Thanks,

Patrick