On Mon, Nov 2, 2020 at 3:22 PM Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> wrote: > > On 11/2/20 3:20 PM, Drew Fustini wrote: > > I am able to have can0 (spi0.0) and can1 (spi1.0) initialize ok on the > > waveshare canfd hat (solder jumper mode A) with the mcp251xfd driver > > from Marc's rpi 5.4 branch. However, I am not able to do a loopback > > test successfully. > > > > No errors from setup: > > sudo ip link set can0 type can bitrate 250000 listen-only on > > sudo ip link set can1 type can bitrate 250000 listen-only on > ^^^^^^^^^^^^^^ > > It really does listen-only on the bus, i.e. not send anything :) > > Marc Thanks for pointing that out! /me might need new glasses :) The can0->can1 test is now working with mcp251xfd: pi@raspberrypi:~$ sudo ip link set can0 type can bitrate 250000 pi@raspberrypi:~$ sudo ip link set can1 type can bitrate 250000 pi@raspberrypi:~$ sudo ifconfig can0 up pi@raspberrypi:~$ sudo ifconfig can1 up pi@raspberrypi:~$ dmesg |tail [ 75.751015] mcp251xfd spi0.0 can0: bit-timing not yet defined [ 75.811003] mcp251xfd spi1.0 can1: bit-timing not yet defined [ 96.934271] mcp251xfd spi0.0 can0: FIFO setup: TEF: 8*12 bytes = 96 bytes, TX: 8*16 bytes = 128 bytes [ 96.934292] mcp251xfd spi0.0 can0: FIFO setup: RX-0: 32*20 bytes = 640 bytes [ 96.934308] mcp251xfd spi0.0 can0: FIFO setup: free: 1184 bytes [ 96.942154] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready [ 97.020451] mcp251xfd spi1.0 can1: FIFO setup: TEF: 8*12 bytes = 96 bytes, TX: 8*16 bytes = 128 bytes [ 97.020464] mcp251xfd spi1.0 can1: FIFO setup: RX-0: 32*20 bytes = 640 bytes [ 97.020474] mcp251xfd spi1.0 can1: FIFO setup: free: 1184 bytes [ 97.990436] IPv6: ADDRCONF(NETDEV_CHANGE): can1: link becomes ready pi@raspberrypi:~$ candump can1 & [1] 1037 pi@raspberrypi:~$ cansend can0 01a#11223344AABBCCDD can1 01A [8] 11 22 33 44 AA BB CC DD thanks, drew
