MSPM0G3507: CAN reset

Hanno Reimer

Intellectual 1920 points

Part Number: MSPM0G3507
Other Parts Discussed in Thread: ISO1050

Tool/software:

I hope you are doing well. I have a question regarding MCAN peripheral reset. I have two MSPM0G3507 devices connected to the same CAN bus and when I reset either one of them using the /RST pin, the other device stops receiving CAN messages and the device that was reseted start recieving CAN messages. The only way to get both devices working is to physically disconnect one of the devices from CAN, perform a reset and connect it back to the CAN. I tried performing CAN reset after some time without received message, using DL_MCAN_reset(); but the device does not receive messages. I also tried running SYSCFG_DL_MCAN0_init(); but with no success. In registers it seems as MCAN_RXF0S.Rx FIFO 0 Message Lost is set, indicating the message was lost, but I can’t reset the peripheral to start receiving messages again. Can you help with the described problem?

ciao

Hanno (on behalf of my customer)

over 1 year ago

0 Eason Zhou over 1 year ago

TI__Mastermind 39675 points

Does your customer have a CAN analysiser? Can they check want happens on the CAN Line.

Maybe the problem happens on CAN transiver not the CAN controller.

0 Jan Suligoj over 1 year ago in reply to Eason Zhou

Prodigy 20 points

Hello,

I think the problem is not the transceiver since the soft reset of the MSPM0 solves the issue. The CAN network consists of Xilinx ZYNQ which send the CAN messages to two slaves that are MSPM0G3507. All three transceivers are Texas ISO1050. When program the ZYNQ, CAN analyzer shows error passive on the CAN line and both MSMP0 stop receiving messages after. After looking at registers i get the "Protocol Error in Arbitration Phase". How do i reset the CAN peripheral, so that it would start receiving again?

Thank you and best regards

0 Eason Zhou over 1 year ago in reply to Jan Suligoj

TI__Mastermind 39675 points

OK, as I am not quite familar with CAN. I need some time to consult my colleague to give you feedback.

0 Eason Zhou over 1 year ago in reply to Eason Zhou

TI__Mastermind 39675 points

Have you try this code and then restart the CAN COMM

DL_MCAN_reset(MCAN0_INST);

DL_GPIO_enablePower(GPIOA);

SYSCFG_DL_MCAN0_init();

0 Jan Suligoj over 1 year ago in reply to Eason Zhou

Prodigy 20 points

Hello, i have discovered the issue. The issue was that i only cleared the interrupt when the CAN message was received and not when the interrupt threw an error. Now it works for the most part i only noticed once that the messages were not received, so i will add the proposed code and get back to you. Thank you for your help.

0 Eason Zhou over 1 year ago in reply to Jan Suligoj

TI__Mastermind 39675 points

That is really good news!

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MSPM0G3507: CAN reset