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The following application is required for the CAN bus functionality:
*[https://fit-iot.com/files/download/fitlet2/sw/drivers/Linux/fitlet2-linux-FTDI-CAN-sniffer-master.tar.gz fitlet2 FTDI CAN sniffer]
 
Simple CAN bus sniffer.
Purposed for the following chain: FTDI232H <-> MCP2515.
Tested on Linux 4.14.41 (Debian sid)
 
Prerequisites:
[https://code.google.com/archive/p/libmpsse/downloads libmpsse-1.3]
libftdi1-1.4 via https://www.intra2net.com/en/developer/libftdi/repository.php
libusb-1.0 via https://libusb.info/
 
Avaliable binaries:
sniff -- dynamically linked against mentioned libraries
sniff.static -- statically linked executable
 
Usage:
 
Prints received frames to STDOUT, sends to net frames gotten from STDIN.
Options:
 
--can_bitrate Hz required CAN bus speed
--can_osc Hz CAN clock oscillator frequency in fact
decimal modifiers 'k' and 'M' are allowed
 
--promiscuous [01] a given RX buffer is to receive all frames
--rollover rollover mode for RX buffer 0
--mask [01]:sid-eid acceptance mask for a mentioned RX buffer
--filter [012345]:sid-eid acceptance filter
 
filters 0 and 1 are purposed for RX buffer 0 and the others for RX buffer 1
mask and filters format: n:sid-eid
where:
num number of mask or filter
sid Standard identifier of mask/filter
eid enhanced identifier of mask/filter
Omitted eid (if any) will be zeroed.
 
--sniff listen-only mode
--showraw print out frames received/to be sent in hex
 
Allowed frame to be sent format:
sid:paiload[0...i]
sid-eid:paiload[0...i]
where i must be less than 8
 
For more detailed explanation of the mentioned options please read the MCP2515.
CAN bus interface chip datasheet:
http://ww1.microchip.com/downloads/en/DeviceDoc/20001801H.pdf
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