AWRL6432: Failed to run CAN in APP if adding CAN operation in SBL

Chris Meng

Mastermind 37756 points

Part Number: AWRL6432

Hi,

My customer added CAN operation (polling mode) in SBL to TX/RX CAN message but found the CAN can't work ok in APP.

They did a lot of test and found if they added 20s delay after Enable Clock for FECSS, CAN works ok in APP.

I suggested customer to add MCAN_txBufCancellationReq before WDT reset (without 20s delay) in SBL, but still failed.

Would you pls kindly advise what may be missed in SBL for MCAN deinit?

Thanks,

Chris

over 1 year ago

0 Tim Henderson over 1 year ago

TI__Expert 8802 points

Hi Chris,

Please see this other E2E about powering down the CAN Controller.

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1332550/iwrl6432-how-to-de-intialise-the-can-after-the-communication-is-completed-how-can-i-do-it

Regards,

Tim

0 Chris Meng over 1 year ago in reply to Tim Henderson

TI__Mastermind 37756 points

Tim,

Customer tried below before WDT reset, but the CAN in APP still can't work normal. Do you have more comment?

MCAN_txBufCancellationReq
MCAN_addClockStopRequest(..,TURE)
PRCMPeripheralClkEnable(Power_module.dbRecords[0], PRCM_GATE_CLK_DISABLE);
CSL_REG32_FINS((CSL_APP_RCM_U_BASE + CSL_APP_RCM_IPCFGCLKGATE1), APP_RCM_IPCFGCLKGATE1_IPCFGCLKGATE1_APP_CAN, PRCM_GATE_CLK_DISABLE);

Thanks,

Chris

0 Tim Henderson over 1 year ago in reply to Chris Meng

TI__Expert 8802 points

Chris,

Can we understand a little more what’s failing? Are they having trouble re-initializing after WDT?

Also, have you taken care to ensure the proper sequence (according to the TRM 12.4.4.8) is being performed coming out of the WDT?

It would be helpful to understand the values of some of the important registers mentioned in that section of the TRM when the customer sees the failure.

Regards,

Tim

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AWRL6432: Failed to run CAN in APP if adding CAN operation in SBL