Stack several 2 Channel CAN BUS FD Shield

Products & Technology Raspberry Pi
#1

Hi, we are in need for more CAN channels, so wonder if we can stack up to 8x 2xCAN F_D shields, in any way to reach a 16xCAN input logger?

#2

There’s a maximum of four, and that depends on the number of SPI controllers.

#3

Thanks, you mean four boards in total 8x CAN buses?

#4

RPI has two SPI controllers, but each controller has two slices to choose from. So an RPI can support 4xCAN FD. 8x CAN need two RPI.

#5

Hi Baozhu,
I have a 2Channel CANFD-HAT. How can I select which SPI to use for each channel?
Can I select the max_freq? now is 20MHz.and the clock supports 40MHz.

Thank you