TCAN4550EVM：TCAN45xx Software User's Guide

user,

Thanks for bringing this our attention. Just to verify, you only have USB2ANY and TCAN4550EVM in your setup correct? And just to make sure I understand, you're performing the same steps as in the user's guide, but your registers are not reflecting the expected value and your CAN message isn't being transmitted.

• What are your USB2ANY SPI settings?
• Can you confirm the device mode by probing the INH pin?
• Can you share the register values of 0x1018, 0x0820, and 0x0824? 

Please share any other information about your test setup, this will help debug the issue quicker. 

Regards,

Hi Eric Hackett

Thank you for your reply.

• What are your USB2ANY SPI settings?

  =>Sorry, I found my SPI setting problem. Now I solved it.

• Can you confirm the device mode by probing the INH pin?

=>When INH pin is in normal mode,Its voltage is 5.75V.

• Can you share the register values of 0x1018, 0x0820, and 0x0824? 

• My register is set as follows：

  Power on to Read Register 0x0820, the value is 0x00500081 and 0x00500089

  0x0824=0x00000000

  0x0800=0xC80004A8 =>setting to Normal mode

  0x1018=0x00000303  =>Enable FD and Bit rate switch

  0x101C=0x00022008 =>setting CAN Speed to 500K

  0x100C=0x00010F50 =>setting CAN FD Speed to 2Mbps 

            When I enabled Normal mode, I try to read 0x0820,the value is 0x004004A1.  

=> CAN silent and CAN Error  bits will to be "1". Why ?

I try to write register 0x0820 0x004004A9, then it can be clear to 0x00000000. 

I followed  TCAN45xx Software User's Guide  section "4.3 Sending and Receiving CAN Messages".

But there is no any output from CAN_H and CAN_L.

Are there any other settings I need to set ?

user,

It looks like you emailed me directly so we'll continue this conversation through email.

Regards,