Difference between revisions of "Application note - CANbus on fitlet2 with FC-SCG running Linux"
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− | * This application note applies to fitlet2 with [http://fit-pc.com/wiki/index.php/Fitlet2_FACET_Cards#FC-SCG FC-SCG] FACET-Card running Linux | + | * This application note applies to [[fitlet2]] with [http://fit-pc.com/wiki/index.php/Fitlet2_FACET_Cards#FC-SCG FC-SCG] FACET-Card running Linux |
− | * It provides an example of how to use the CANbus | + | * It provides an example of how to use the CANbus feature of FC-SCG under Linux |
* 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] | * 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== | ==Simple CAN bus sniffer== | ||
− | + | Written for the following chain: [https://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232H.pdf FTDI232H] <-> [https://www.microchip.com/wwwproducts/en/en010406 MCP2515].<br> | |
Tested on Linux 4.14.41 (Debian sid) | Tested on Linux 4.14.41 (Debian sid) | ||
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[[category: software]] | [[category: software]] | ||
[[category: Extension boards]] | [[category: Extension boards]] | ||
+ | [[category: application notes]] |
Latest revision as of 10:49, 16 October 2018
- This application note applies to fitlet2 with FC-SCG FACET-Card running Linux
- It provides an example of how to use the CANbus feature of FC-SCG under Linux
- The following application is required for the CAN bus functionality: fitlet2 FTDI CAN sniffer
Simple CAN bus sniffer
Written for the following chain: FTDI232H <-> MCP2515.
Tested on Linux 4.14.41 (Debian sid)
Prerequisites: 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 datasheet:
MCP2515 CAN bus interface chip datasheet