shigeki

So, i finally manege this to work. Tested on newest kernel : Linux bananapi 5.4.26-sunxi #20.02.5 SMP Thu Mar 19 22:23:40 CET 2020 armv7l GNU/Linux First, you need to patch dtb : # cd /boot/dtb-5.4.26-sunxi # diff sun7i-a20-bananapi.dts sun7i-a20-bananapi.dts.bak 710c710,716 < can0_pins_a: can0@0 { --- > can-pa-pins { > pins = "PA16\0PA17"; > function = "can"; > phandle = < 0x63 >; > }; > > can-ph-pins { 713d718 < linux,phandle = < 0x64 >; 1446,1447c1451 < status = "okay"; < linux,phandle = < 0xb0 >; --- > status = "disabled"; 1449,1450d1452 < pinctrl-names = "default"; < pinctrl-0 = <&can0_pins_a>; 1862c1864,1865 < can0_pins_a = "/soc/pinctrl@1c20800/can0@0"; --- > can_pa_pins = "/soc/pinctrl@1c20800/can-pa-pins"; > can_ph_pins = "/soc/pinctrl@1c20800/can-ph-pins"; And in my test environment (two Arduino with mcp2515 CAN Module receiver and sender ) and bananapi i had to set baud rate 125K on banana pi and 250K on Arduino sender/receiver.

Hi again. After 2 years i want to try configure CanBus on BananaPi and still nothing. I'm continuing my previous post What i do: 1) Paths dtb with this instruction : 2) Load kernel modules: # lsmod | grep can can_raw 20480 1 can_bcm 24576 0 can 20480 2 can_raw,can_bcm sun4i_can 16384 0 can_dev 20480 1 sun4i_can 3) Spawn can0 interface # ip link set can0 type can bitrate 500000 restart-ms 100 triple-sampling on loopback on # ip link set up can0 4) Play with candump / cansend On loopback my messages show in candump, but on arduino receiver still nothing My test env: Two arduino uno with mcp2515 + tja1050 - one as sender other as receiver BananaPi 4.19.62-sunxi and tja1051 transceiver Bitrate on all boards set to 500k Maybe this may be helpful: # ip -det link show can0 4: can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP mode DEFAULT group default qlen 10 link/can promiscuity 0 minmtu 0 maxmtu 0 can <LOOPBACK,TRIPLE-SAMPLING> state ERROR-WARNING (berr-counter tx 0 rx 129) restart-ms 100 bitrate 500000 sample-point 0.875 tq 125 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1 sun4i_can: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp-inc 1 clock 24000000numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535 # dmesg | grep can [ 8.090861] sun4i_can 1c2bc00.can: device registered (base=(ptrval), irq=53) [ 8.120057] can: controller area network core (rev 20170425 abi 9) [ 8.128499] can: broadcast manager protocol (rev 20170425 t) [ 8.132629] can: raw protocol (rev 20170425) [ 3502.151374] sun4i_can 1c2bc00.can can0: bus-off [ 3502.255288] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready [ 3507.633774] sun4i_can 1c2bc00.can can0: bus-off [ 3507.735553] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready [ 3509.316187] sun4i_can 1c2bc00.can can0: bus-off [ 3509.419665] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready [ 3510.275698] sun4i_can 1c2bc00.can can0: bus-off [ 3510.388158] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready [ 3518.457783] sun4i_can 1c2bc00.can can0: bus-off [ 3518.560252] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready [ 3520.323530] sun4i_can 1c2bc00.can can0: bus-off [ 3520.710972] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready [ 3522.219241] sun4i_can 1c2bc00.can can0: bus-off [ 3522.320498] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready [ 3523.602391] sun4i_can 1c2bc00.can can0: bus-off [ 3523.704584] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready

Hi all, I'm interested in running canbus on Banana Pi (A20). I have problem with setup canbus. Some info about system: ARMBIAN 5.38 stable Debian GNU/Linux 9 (stretch) 4.14.18-sunxi in armbian-config -> System -> Hardware only "can" is enable and MCP2551 transreciver is connected to can rx/tx banana pinout. lsmod | grep can: root@bananapi:~# lsmod | grep can can_bcm 24576 0 can_raw 20480 1 can 20480 2 can_raw,can_bcm sun4i_can 16384 0 can_dev 20480 1 sun4i_can Next setup interface: ip link set can0 type can bitrate 125000 restart-ms 100 triple-sampling on loopback on ip link set up can0 cangen seems to working well, but there is no info from candump: root@bananapi:~# ip -details -statistics link show can0 4: can0: <NOARP,UP,ECHO> mtu 16 qdisc pfifo_fast state UP mode DEFAULT group default qlen 10 link/can promiscuity 0 can <LOOPBACK,TRIPLE-SAMPLING> state BUS-OFF (berr-counter tx 207 rx 0) restart-ms 100 bitrate 125000 sample-point 0.875 tq 500 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1 sun4i_can: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp-inc 1 clock 24000000 re-started bus-errors arbit-lost error-warn error-pass bus-off 1398 1796 0 1399 1 1399 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535 RX: bytes packets errors dropped overrun mcast 47248 5906 1796 0 0 0 TX: bytes packets errors dropped carrier collsns 0 0 0 6 0 0 dmesg: [ 11.943534] sun4i_can 1c2bc00.can: device registered (base=f14bac00, irq=50) [ 918.999564] can: controller area network core (rev 20170425 abi 9) [ 919.016080] can: raw protocol (rev 20170425) [ 1257.584974] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready ifconfig: root@bananapi:~# ifconfig can0 can0: flags=193<UP,RUNNING,NOARP> mtu 16 unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 10 (UNSPEC) RX packets 8936 bytes 71488 (69.8 KiB) RX errors 2669 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 6 overruns 0 carrier 6 collisions 0 device interrupt 50 I have play with arduino sender and reciver, both working ok, reciver recive msg candum nothing recive. Wiring: