J784S4XEVM: Configuring CAN on MCUs

Deepankar maithani

Part Number: J784S4XEVM

Tool/software:

I would like to understand the process of configuring CAN on J784S4. Specifically i want to know

1. How do i configure muxed pins as CAN High and CAN Low pin.

2. As there are several uC cores and uP cores. How do i configure a particular instance of a CAN peripheral to be used by a particular core.

3. Where are the APIs for configuring CAN documentad?

3. I saw that there is CSL library and MCAL layer. Can MCAL be used if i am only freeRTOS or is it ment only to be used with Autosar?

4. Is there any example that run on J784s4 out of the box

over 1 year ago

0 Deepankar maithani over 1 year ago

Intellectual 336 points

I tried to build some loopback csl examples but i donot get any binaries

0 Tarun Mukesh Puvvada over 1 year ago in reply to Deepankar maithani

TI__Guru 61416 points

Hello,

Your build command is wrong , it is BOARD=j784s4_evm

You can look into software-dl.ti.com/.../mcan.html

Regards

Tarun Mukesh

0 Deepankar maithani over 1 year ago in reply to Tarun Mukesh Puvvada

Intellectual 336 points

Yes the software builds . Can you please explain or point to code snippet where pins are configured as CAN High and CAN Low pin. And also an example where a peripheral is assigned to a MCU core?

0 Tarun Mukesh Puvvada over 1 year ago in reply to Deepankar maithani

TI__Guru 61416 points

Hello,

Deepankar maithani said:
Can you please explain or point to code snippet where pins are configured as CAN High and CAN Low pin.

That is done inside this API padConfig_prcmEnable.

Deepankar maithani said:
And also an example where a peripheral is assigned to a MCU core?

We are doing in the beginning of the API test_csl_mcan_evm_loopback_app with define flags

Regards

Tarun Mukesh

0 Deepankar maithani over 1 year ago in reply to Tarun Mukesh Puvvada

Intellectual 336 points

I used the release binary that i got after building the source code and used it to build tispl. After making this change now my A72 core doesnot boot and also there are no messages on the MCU domain UART. Here is serial terminal output from main domain UART and MCU domain UART. Do i need to make any other changes in the HLOS?

0 Deepankar maithani over 1 year ago in reply to Deepankar maithani

Intellectual 336 points

I also checked on PCAN connted to CAN channel and no CAN messages there.

0 Tarun Mukesh Puvvada over 1 year ago in reply to Deepankar maithani

TI__Guru 61416 points

Hello,

The PDK examples are standalone examples by default , they don't work along with linux on A72.

If you are planning to use linux and also pdk examples , you need to ensure of taking care of disabling CAN instances from linux, pin mux should not be overwritten.

Regards

Tarun Mukesh

0 Deepankar maithani over 1 year ago in reply to Tarun Mukesh Puvvada

Intellectual 336 points

How do i run it standalone? Can you please give me some pointers ? I have tiboot3.bin tispl and u-boot.img in my ospi. if i remove u-boot. Will it be enough?

0 Tarun Mukesh Puvvada over 1 year ago in reply to Deepankar maithani

TI__Guru 61416 points

Hello,

You can follow the URL https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/09_00_00_02/exports/docs/psdk_rtos/docs/user_guide/ccs_setup_j721e.html#debugging-without-hlos-running-on-a72-rtos-only-baremetal using CCS to load the core and execute the binary.

Regards

Tarun Mukesh

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J784S4XEVM: Configuring CAN on MCUs