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After reading through MCP25625 data sheet, I have these questions cannot be figured out

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sunnysimon
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2019/07/16 13:20:15 (permalink)
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After reading through MCP25625 data sheet, I have these questions cannot be figured out

Hello all,
 
I am a newbie to CAN world.
 
I read through MCP25625 data sheet but several things are still not clear.
 
1. Since I am not using MCU from Microchip, how can I access registers inside CAN and read its value? (My MCU will be SPI master and I think CAN will be slave)
 
2. Transmit buffer and receive buffer has special 14 bytes layout. Is that mean when I send data from MCU, I will need to follow the same pattern? If not, could someone explain how it convert from the data I send into buffer layout?
 
3. In data sheet, if using SPI interface, there are several commands can be used. But in Tx buffer or Rx buffer layout, there is no byte for command. Will command byte be treated as data?
 
Thank you
 
Simon
 
post edited by sunnysimon - 2019/07/16 13:49:02
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