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January 28, 2019 14:52
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swcan test
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| [ 36.680573] mcp251x spi2.1 can2: MCP2515 successfully initialized. | |
| sudo ip link set can2 type can bitrate 500000 listen-only on | |
| sudo ifconfig can2 up | |
| sudo ifconfig can2 | |
| can2: 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 78947 bytes 591082 (577.2 KiB) | |
| RX errors 157 dropped 0 overruns 0 frame 157 | |
| TX packets 0 bytes 0 (0.0 B) | |
| TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 | |
| candump -cae can2,0:0,#FFFFFFFF | |
| [ 36.680573] mcp251x spi2.1 can2: MCP2515 successfully initialized. | |
| [ 373.857185] can: raw protocol (rev 20170425) | |
| debian@beaglebone:~$ candump -cae can2,0:0,#FFFFFFFF|head -20 | |
| can2 1DC43772 [8] remote request | |
| can2 1D5 [8] remote request | |
| can2 1DC43772 [8] remote request | |
| can2 1D5 [8] remote request | |
| can2 1DC43772 [8] remote request | |
| can2 1D5 [8] remote request | |
| can2 1DC43772 [8] remote request | |
| can2 1D5 [8] remote request | |
| can2 1DC43772 [8] remote request | |
| can2 5EF [8] 4A B3 F7 B3 CF CF BB B3 'J.......' | |
| can2 1D5 [8] remote request | |
| can2 5EF [8] 4A B3 F7 B3 CF CF BB B3 'J.......' | |
| can2 1D5 [8] remote request | |
| can2 5EF [8] 4A B3 F7 B3 CF CF BB B3 'J.......' | |
| can2 1D5 [8] remote request | |
| can2 1DC43772 [8] remote request | |
| can2 5EF [8] 4A B3 F7 B3 CF CF BB B3 'J.......' | |
| can2 1DC43772 [8] remote request | |
| can2 5EF [8] 4A B3 F7 B3 CF CF BB B3 'J.......' | |
| can2 1DC43772 [8] remote request | |
| P2.06 #M0 | |
| P2.18 #M1 | |
| debian@beaglebone:/opt/source/bb.org-overlays$ config-pin -q p2.06 | |
| P2_06 pinmux file not found! | |
| Cannot read pinmux file: /sys/devices/platform/ocp/ocp*P2_06_pinmux/state | |
| debian@beaglebone:/opt/source/bb.org-overlays$ config-pin -q p2.18 | |
| P2_18 pinmux file not found! | |
| Cannot read pinmux file: /sys/devices/platform/ocp/ocp*P2_18_pinmux/state | |
| debian@beaglebone:/opt/source/bb.org-overlays$ | |
| ############################### | |
| DEVICE TREE OVERLAY CHANGED TO: | |
| ############################### | |
| fragment@0 { | |
| target = <&ocp>; | |
| __overlay__ { | |
| P2_25_pinmux { status = "disabled"; }; /* SPI1 MOSI - gpio1_9 */ | |
| P2_27_pinmux { status = "disabled"; }; /* SPI1 MISO - gpio1_8 */ | |
| P2_29_pinmux { status = "disabled"; }; /* SPI1 CLK - gpio0_7 */ | |
| P2_30_pinmux { status = "disabled"; }; /* SPI1 CS0 - gpio3_17 */ | |
| P2_31_pinmux { status = "disabled"; }; /* SPI1 CS1 - gpio0_19 */ | |
| P2_08_pinmux { status = "disabled"; }; /* SWC nINT */ | |
| P2_32_pinmux { status = "disabled"; }; /* SWC nRESET */ | |
| /* control from config-pin for SWCAN test */ | |
| /* P2_06_pinmux { status = "disabled"; }; */ /* SWC M0 */ | |
| /* P2_18_pinmux { status = "disabled"; }; */ /* SWC M1 */ | |
| }; | |
| }; | |
| fragment@1 { | |
| target = <&spi1>; | |
| __overlay__ { | |
| status = "okay"; | |
| pinctrl-names = "default"; | |
| /* pinmux definitions used by pinctrl for these pins: | |
| https://github.com/beagleboard/linux/blob/4.14/arch/arm/boot/dts/am335x-pocketbeagle.dts#L692 | |
| */ | |
| pinctrl-0 = < | |
| /* control from config-pin: &P2_06_gpio_pin */ /* SWC M0 */ | |
| /* control from config-pin: &P2_18_gpio_pin */ /* SWC M1 */ | |
| &P2_32_gpio_pu_pin /* SWC nRESET: enable pullup */ | |
| &P2_08_default_pin /* SWC nINT: use mode 0x37 */ | |
| &P2_25_spi_pin /* SPI1 MOSI: uart0_rtsn.spi1_d1*/ | |
| &P2_27_spi_pin /* SPI1 MISO: uart0_ctsn.spi1_d0 */ | |
| &P2_29_spi_sclk_pin /* SPI1 CLK: eCAP0_in_PWM0_out.spi1_sclk */ | |
| &P2_30_spi_cs_pin /* SPI1 CS0: mcasp0_ahclkr.spi1_cs0 */ | |
| &P2_31_spi_cs_pin /* SPI1 CS1: xdma_event_intr0.spi1_cs1 */ | |
| >; | |
| ################################ | |
| debian@beaglebone:~$ config-pin -q p2.18 | |
| P2_18 Mode: default Direction: in Value: 0 | |
| debian@beaglebone:~$ config-pin -q p2.06 | |
| P2_06 Mode: default Direction: in Value: 0 | |
| debian@beaglebone:~$ config-pin -l p2.06 | |
| default gpio gpio_pu gpio_pd gpio_input | |
| debian@beaglebone:~$ config-pin p2.06 gpio_pu | |
| debian@beaglebone:~$ config-pin p2.18 gpio_pu | |
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I thought I would reply here about SWCAN testing that I'm doing on the PocketBeagle.
I have the PocketBeagle with Macchina M2 adapter connected to an M2 processor board using the Macchina ODB-2 cable (which has 12V power attached).
The M2 processor board is running a SWCAN test that Josh created which is sending SWCAN messages,
I have set pins M0 and M1 high to test the PocketBeagle receiving the SWCAN messages. I believe this is correct based on this Arduino library code:
https://github.com/macchina/Single-Wire-CAN-mcp2515/blob/master/src/MCP2515_sw_can.cpp#L65
I'm receiving CAN messages but I'm not sure if they are correct or not:
debian@beaglebone:
$ config-pin p2.06 gpio_pu #pull up SWC M0 to 3.3V for normal mode$ config-pin p2.18 gpio_pu #pull up SWC M1 to 3.3V for normal modedebian@beaglebone:
debian@beaglebone:
$ sudo ifconfig can2 down$ sudo ifconfig can2 updebian@beaglebone:
debian@beaglebone:~$ candump -cae can2,0:0,#FFFFFFFF
can2 1D5 [8] remote request
can2 1FFEBFFB [8] remote request
can2 1D5 [8] remote request
can2 1FFEBFFB [8] remote request
can2 1FFEBFFB [8] remote request
can2 1D5 [8] remote request
can2 1FFEBFFB [8] remote request
can2 1D5 [8] remote request
can2 1FFEBFFB [8] remote request
can2 1FFEBFFB [8] remote request
can2 1D5 [8] remote request
The dump has repeating lines like the above until I kill it.
Any suggestions on how to determine if these are valid messages or not?
Thanks,
Drew