AM2431: BissC module not working on PRG1_PRU0

Jianyu Wang

Part Number: AM2431

Tool/software:

Hi,

I am working on AM2431 ALV and trying to implement BissC encoder based on motro control sdk v9.2.0.09, with example bissc_diagnostic_signle_channel_am243x-lp.

A big difference is that pins is changed to PRG1_PRU0 for our board.

I tested the code on AM2431 ALV. The code is unchanged.

In function bissc_pruicss_load_run_fw, when program has finished function PRUICSS_enableCore,

- for LP_AM243, PRG0_PRU1_GPO0 starts to output 1Mhz clk signal, originally high.

- for AM2431 ALV, PRG1_PRU0_GPO0 changes to low from high.

My question is whether I need some more modifications. Is BiSSFirmware_0 only works in PRG0_PRU1?

Thansk in advance.

over 1 year ago

0 Jianyu Wang over 1 year ago

Intellectual 920 points

I have also tried on LP that migrate bissc to PRG0_PRU1, PRG0_PRU0_GPO0 also output no clock.

0 Achala Ram over 1 year ago in reply to Jianyu Wang

TI__Expert 3990 points

Jianyu Wang said:
Is BiSSFirmware_0 only works in PRG0_PRU1?

Hi Jianyu,

You need to build firmware binary for PRU0, BiSSFirmware_0 is built for PRU1 so it will not work for PRU0.

Thanks & regards,

Achala Ram

0 Kevin Peng over 1 year ago in reply to Achala Ram

TI__Expert 4758 points

Hi Achala,

Thanks for your reply!

May I know which source code customer needed to rebuild the firmware binary for PRU0? Could you please give some guidance?

Another thing is could customer simply change the pin as mentioned above without recompiling the PRU0? Is recompiling PRU0 a must requirement for customer?

Many thanks,

Kevin

0 Achala Ram over 1 year ago in reply to Kevin Peng

TI__Expert 3990 points

Kevin Peng said:
May I know which source code customer needed to rebuild the firmware binary for PRU0? Could you please give some guidance?

Below are the steps to build firmware binary for PRU0

Import the BissC single channel firmware project in css: from mentioned path-> motor_control_sdk_am243x_09_02_00_03\source\position_sense\bissc\firmware\single_channel\am243x-evm\icssg0-pru1_fw
Right click on imported project & open the properties tab
Change the corresponding Predefine Symbols: PRU1-> PRU0, SLICE1->SLICE0 & if they are building for ICSSG1 then also ICSSG0->ICSSG1
Apply changes & close the properties tab
Build the firmware project

BR,

Achala Ram

0 Jianyu Wang over 1 year ago in reply to Achala Ram

Intellectual 920 points

I compiled the project and now the pin correctly output the clock, thanks.

One more thing though, I also found SDFM project (sdfm_firmware_single_axis_single_pru_am243x-evm_icssg0-pru0_fw_ti-pru-cgt) in the SDK changed the defines accordingly. However, the ouput image is exactly same with the original one used in single_chip_serv. Just want to be sure whether it is by design.

0 Dhaval Khandla over 1 year ago in reply to Jianyu Wang

TI__Mastermind 29014 points

Which PRU do you want to use for SDFM?

Regards

Dhaval

0 Jianyu Wang over 1 year ago in reply to Dhaval Khandla

Intellectual 920 points

ICSSG1, PRU1

+1 Achala Ram over 1 year ago in reply to Jianyu Wang

TI__Expert 3990 points

Hi Jianyu,

Jianyu Wang said:
However, the ouput image is exactly same with the original one used in single_chip_serv. Just want to be sure whether it is by design.

Yes, It is buy design. SDFM driver takes care of PRU slice, so firmware binary image is same as original one.

Thanks & regards,

Achala Ram

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AM2431: BissC module not working on PRG1_PRU0