Controll of the baud rate in can_pal_s32k146 example on S32K146EVB-Q144

[Tsunokawa]

Hello, 

I'm using S32K146EVB-Q144. And tried to check the output CAN signal using external CAN device (CANoe) but didn't succeed. I guess the baud rate mismatched. The setting of the CANoe was 500KB/s.

How can I know the baud rate of the signal the can_pal_s32k146 example output.

The CAN periferal configuration was defined in can_pal1.c file generated.

My assumption is the below

The clock source is selected as CAN_CLK_SOURCE_OSC. This is 4MHz (Extenral Cyristal Frequency / 2).

baud rate = 4MHz / ((7+1) + (4+1) + (1+1) + 1) = 4MHz/16 = 250KHz.

Is my assumption right?

And when enableFD = false, is dataBitrate ignored?

Any response will be appliciated. Thank you.

[Tsunokawa]

I could monitor the CAN packet after supplying the power from J16.

Thank you very much for your support.

[Robin_Shen]

You are welcome!
I am glad to hear that it works now.

[Tsunokawa]

Thank you Robin for the quick reply.

I got it! (I had thought the 8MHz would be divided by 2 because of the name of the clock "SOSCDIV2_CLK" before being input to the CAN peripheral).

And I was using only USB cable. Let me modify the HW. Let me try again. I need some more HW modification, next reply will be delay sorry.

Best regards,

Tsunokawa

[Robin_Shen · Accepted solution]

Hi 

The example uses an 8MHz crystal, you can check it out here:

Note that: SOSCDIV2_CLK/1=8MHz 

If enableFD = false, dataBitrate is ignored.

The example documentation can be found in the S32 SDK documentation at Examples and Demos section. (<SDK_PATH>/doc/Start_Here.html)

Please note: Power on the board with external supply 12V (J16). This information can be found in :file:///C:/NXP/S32DS.3.4/S32DS/software/S32SDK_S32K1XX_RTM_4.0.3/doc/html_S32K146/can_pal_s32k146_gr...

Best Regards,
Robin
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