NAME¶

cangen - manual page for cangen 2023.03-1

SYNOPSIS¶

cangen [options] <CAN interface>

DESCRIPTION¶

cangen - CAN frames generator.

OPTIONS¶

-g <ms>

(gap in milli seconds - default: 200 ms)

-a

(use absolute time for gap)

-t

(use SO_TXTIME)

--start <ns>

(start time (UTC nanoseconds))

--mark <id>

(set SO_MARK to <id>, default 1)

-e

(generate extended frame mode (EFF) CAN frames)

-f

(generate CAN FD CAN frames)

-b

(generate CAN FD CAN frames with bitrate switch (BRS))

-E

(generate CAN FD CAN frames with error state (ESI))

-R

(generate RTR frames)

-8

(allow DLC values greater then 8 for Classic CAN frames)

-m

(mix -e -f -b -E -R frames)

-I <mode>

(CAN ID generation mode - see below)

-L <mode>

(CAN data length code (dlc) generation mode - see below)

-D <mode>

(CAN data (payload) generation mode - see below)

-p <timeout>

(poll on -ENOBUFS to write frames with <timeout> ms)

-n <count>

(terminate after <count> CAN frames - default infinite)

-i

(ignore -ENOBUFS return values on write() syscalls)

-x

(disable local loopback of generated CAN frames)

-c <count>

(number of messages to send in burst, default 1)

-v

(increment verbose level for printing sent CAN frames)

EXAMPLES¶

cangen vcan0 -g 4 -I 42A -L 1 -D i -v -v

(fixed CAN ID and length, inc. data)

cangen vcan0 -e -L i -v -v -v

(generate EFF frames, incr. length)

cangen vcan0 -D 11223344DEADBEEF -L 8

(fixed CAN data payload and length)

cangen vcan0 -D 11xx3344DEADBEEF -L 8

(fixed CAN data payload where 2. byte is randomized, fixed length)

cangen vcan0 -I 555 -D CCCCCCCCCCCCCCCC -L 8 -g 3.75

(generate a fix busload without bit-stuffing effects)

cangen vcan0 -g 0 -i -x

(full load test ignoring -ENOBUFS)

cangen vcan0 -g 0 -p 10 -x

(full load test with polling, 10ms timeout)

cangen vcan0

(my favourite default :)