How to enable cpu02 to send/receive over CAN bus A? (TMS320F28377D)

Hi Robert,

Please check if you have enable the CAN clock from CPU02. Once a peripheral is assigned to CPU02, clock path from CPU02 is used for that peripheral and it need to be enabled from CPU02 code via PCLKCRx register (in this case PCLKCR10 register).

Regards,

Vivek Singh

Hi Vivek,

Thanks for the feedback. I added the following to CPU02:

EALLOW;
CpuSysRegs.PCLKCR10.bit.CAN_A = 1;
EDIS;

but CPU02 is still unable to send/receive on CAN bus A (using the same sample code that works for CPU01).

Are there additional settings (other than GPIO pin config and clock enable) for assigning CANA to CPU02?

Thanks again,

Robert

Hi Robert,

Following are the steps which needed (apart from normal device initialization) -

CPU1 -

• Setup the GPIO pinmuxing for CANA peripheral
• Assign the CANA peripheral to CPU2

CPU2 -

• Enable the clock for CANA
• Setup CANA

Please make sure you are following these steps. If no issue in sharing the code, please share the CPU1/CPU2 code related to CANA.

Regards,

Vivek Singh

Hi Vivek,

I need more details on how to implement CPU1 step 2  above (Assign CANA peripheral to CPU2). I am confident I have all of the other steps covered (for both CPU1 & CPU2).

I am confident that CPU1 is handling the pinmuxing config correctly but not sure what else is required on that side. This is not holding me up right now but we really need to get CANA under CPU2 control soon.

Thanks for your patience,

Robert

Hi Vivek,

Success! Thanks for pointing me to the CPUSEL8 register. That did the trick.

Thanks again,

Robert