I have a FRDM-KEAZ128 development board （part number FRDM-KEAZ128Q80）. There is a MC33903 SBC chip on the development board. I want to develop CAN now, but I don't want to configure the MC33903. I noticed that the MC33903 has a debug mode and can use the CAN transceiver without configuring the MC33903 via SPI. How to configure the circuit in the picture?
Hi Logan,
If you want to configure the MC33903 in debug mode, you need to follow that chip's datasheet:
I suggest you control the SPI interface to enable the CAN module.
Actually, in the community, there has a sample code for your reference, you can refer to it:
FRDM-KEAZ128Q80 MSCAN Communication
MSCAN_Driver+FRDM_KEA128 Example_TransmitPerSecond.zip
It is S32DS on FRDM-KEAZ128 board.
You can try this code:
Have a great day,
Kerry
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Hi Logan,
Yes, you are right, this board need to connect 12V power at J16, J107 need to connect pin1,2.
The bit rate is 500Kpbs, this is my test result:
Actually, 12V power is very easy to find.
If you don't want to use 12V, you also can use our TRK-KEA128 board, that board CAN transiver don't need the external 12V, just USB cable is OK.
Wish it helps you!
Have a great day,
Kerry
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Note: If this post answers your question, please click the Correct Answer button. Thank you!
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