AWR1642: MCAN/DCAN driver difference on the message RAM initialize

Hi,

Please give us some time to review this question

thank you

Cesar

Hi Cesar,

Please let me know if you have any update on this question.

Thanks.

Wesley

Hi Wesley,

I don't have an answer yet. Checking again

thank you

Cesar

Hi Cesar,

Please let me know if you have any update on this question.

Thanks.

Wesley

Hi Wesley,

I have not received a response yet.

I will set up a call with the team next week

thank you

Cesar

Hi Wesley,

Unfortunately the original team that developed these drivers is no longer available for support. So, we will have to check this information with design team.

Can you please let me know following information

• What is the section in the TRM that mentions the information related to this question?
  • I checked the TRM but could not find mention that Message RAM must be init.
• In the DCAN driver, where is the DCAN driver initialization of the message RAM referred to?
  • Is it the section below in "C:\ti\mmwave_sdk_02_01_00_04\packages\ti\drivers\can\test\common\main.c"?

    /*Intialize DCAN Tx transfer Params*/
    dcanTxData->dataLength = DCAN_MAX_MSG_LENGTH;
    dcanTxData->msgData[0] = 0xA5;
    dcanTxData->msgData[1] = 0x5A;
    dcanTxData->msgData[2] = 0xFF;
    dcanTxData->msgData[3] = 0xFF;
    dcanTxData->msgData[4] = 0xC3;
    dcanTxData->msgData[5] = 0x3C;
    dcanTxData->msgData[6] = 0xB4;
    dcanTxData->msgData[7] = 0x4B;

Thank you

Cesar

Wesley He said:

Hi team,

in the driver code, customer have the question on the message ram initialize for MCAN and DCAN driver.

Why the DCAN driver need to initial the message RAM, but MCAN didnot need this? As the TRM descript, both driver had use the message ram.

What's the difference here?

Hi Cesar,

Customer said that they only call below for DCAN, but no need to do it for MCAN in SDK.

/* Initialize peripheral memory */
SOC_initPeripheralRam(socHandle, SOC_MODULE_DCAN, &errCode);

But in app note(Adding CAN-FD Tx and Rx to an Existing mmWave Project): https://www.ti.com/lit/an/spracf7/spracf7.pdf

In Page 2, The code had initialize the MCAN RAM.

/* Initialize peripheral memory */

SOC_initPeripheralRam(gMmwMssMCB.socHandle, SOC_MODULE_MCAN, &errCode);

So, customer want to understand what's the different here? And which one is correct? Thanks.

Regards,

Wesley

Thank you

Let me review this

Cesar