Hello,
I have a problem with the CAN1 interface on my Beaglebone Black.
debian@beaglebone:~$ sudo /opt/scripts/tools/version.sh
[sudo] password for debian:
git:/opt/scripts/:[8f20cac93cbbec2ab705333a543903287ff9e7d4]
eeprom:[A335BNLT00C02017BBBK05D5]
model:[TI_AM335x_BeagleBone_Black]
dogtag:[BeagleBoard.org Debian Image 2018-10-07]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot
2019.04-00002-gbb4af0f 50f]:[location: dd MBR]
bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot
2019.04-00002-gbb4af0f50f]:[l ocation: dd MBR]
UBOOT: Booted Device-Tree:[am335x-boneblack-uboot-univ.dts]
UBOOT: Loaded Overlay:[AM335X-PRU-RPROC-4-14-TI-00A0]
UBOOT: Loaded Overlay:[BB-ADC-00A0]
UBOOT: Loaded Overlay:[BB-BONE-eMMC1-01-00A0]
UBOOT: Loaded Overlay:[BB-CAN1-00A0]
UBOOT: Loaded Overlay:[BB-I2C2-00A0]
UBOOT: Loaded Overlay:[BB-NHDMI-TDA998x-00A0]
UBOOT: Loaded Overlay:[BB-SPIDEV0-00A0]
kernel:[4.14.108-ti-r118]
nodejs:[v6.17.0]
/boot/uEnv.txt Settings:
uboot_overlay_options:[enable_uboot_overlays=1]
uboot_overlay_options:[uboot_overlay_addr4=/lib/firmware/BB-SPIDEV0-00A0.dtbo]
uboot_overlay_options:[uboot_overlay_addr5=/lib/firmware/BB-I2C2-00A0.dtbo]
uboot_overlay_options:[uboot_overlay_addr6=/lib/firmware/BB-CAN1-00A0.dtbo]
uboot_overlay_options:[disable_uboot_overlay_audio=1]
uboot_overlay_options:[disable_uboot_overlay_wireless=1]
uboot_overlay_options:[uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-14-TI-
00A0.dtbo]
uboot_overlay_options:[enable_uboot_cape_universal=1]
pkg check: to individually upgrade run: [sudo apt install --only-upgrade
<pkg>]
pkg:[bb-cape-overlays]:[4.4.20190922.0-0rcnee0~stretch+20190922]
pkg:[bb-wl18xx-firmware]:[1.20190227.1-0rcnee0~stretch+20190227]
pkg:[kmod]:[23-2rcnee1~stretch+20171005]
pkg:[librobotcontrol]:[1.0.4-git20190227.1-0rcnee0~stretch+20190327]
pkg:[firmware-ti-connectivity]:[20180825+dfsg-1rcnee1~stretch+20181217]
groups:[debian : debian adm kmem dialout cdrom floppy audio dip video
plugdev us ers systemd-journal i2c bluetooth netdev cloud9ide gpio pwm
eqep admin spi tisdk weston-launch xenomai autologin]
cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1
root=/dev/m mcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M
net.ifnames=0 quiet]
dmesg | grep remote
[ 1.244859] remoteproc remoteproc0: wkup_m3 is available
[ 1.464098] remoteproc remoteproc0: powering up wkup_m3
[ 1.464219] remoteproc remoteproc0: Booting fw image
am335x-pm-firmware.elf, size 217168
[ 1.468443] remoteproc remoteproc0: remote processor wkup_m3 is now up
[ 10.159438] remoteproc remoteproc1: 4a334000.pru is available
[ 10.179638] remoteproc remoteproc2: 4a338000.pru is available
dmesg | grep pru
[ 10.135980] pruss 4a300000.pruss: creating PRU cores and other child
platform devices
[ 10.159438] remoteproc remoteproc1: 4a334000.pru is available
[ 10.159565] pru-rproc 4a334000.pru: PRU rproc node
/ocp/pruss_soc_bus@4a32600 4/pruss@0/pru@34000 probed successfully
[ 10.179638] remoteproc remoteproc2: 4a338000.pru is available
[ 10.179757] pru-rproc 4a338000.pru: PRU rproc node
/ocp/pruss_soc_bus@4a32600 4/pruss@0/pru@38000 probed successfully
dmesg | grep pinctrl-single
[ 0.943534] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size
568
dmesg | grep gpio-of-helper
[ 0.955505] gpio-of-helper ocp:cape-universal: ready
lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
END
debian@beaglebone:~$ cat
/sys/kernel/debug/pinctrl/44e10800.pinmux/pinmux-pins
...
pin 96 (PIN96): 481d0000.can (GPIO UNCLAIMED) function pinmux_dcan1_pins
group pinmux_dcan1_pins
pin 97 (PIN97): 481d0000.can (GPIO UNCLAIMED) function pinmux_dcan1_pins
group pinmux_dcan1_pins
...
debian@beaglebone:~$ sudo ip link set can1 up type can bitrate 125000
everythings fine with no Error or Warning.
and then i try:
debian@beaglebone:~$ cansend can1 07f#4004
Nothing happens at the CAN bus
debian@beaglebone:~$ cansend can1 07f#4004
debian@beaglebone:~$ cansend can1 07f#4004
debian@beaglebone:~$ cansend can1 07f#4004
debian@beaglebone:~$ cansend can1 07f#4004
debian@beaglebone:~$ cansend can1 07f#4004
debian@beaglebone:~$ ip -details -statistics link show can1
3: can1: <NO-CARRIER,NOARP,UP,ECHO> mtu 16 qdisc pfifo_fast state DOWN mode
DEFAULT group default qlen 10
link/can promiscuity 0
can state BUS-OFF (berr-counter tx 248 rx 0) restart-ms 0
bitrate 125000 sample-point 0.875
tq 500 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1
c_can: tseg1 2..16 tseg2 1..8 sjw 1..4 brp 1..1024 brp-inc 1
clock 24000000
re-started bus-errors arbit-lost error-warn error-pass bus-off
0 0 0 1 1 1
numtxque ues 1 numrxqueues 1 gso_max_size 65536
gso_max_segs 65535
RX: bytes packets errors dropped overrun mcast
24 3 0 0 0 0
TX: bytes packets errors dropped carrier collsns
0 0 0 0 0 0
debian@beaglebone:~$
What am I doing wrong? Why is nothing transmitted ?
I monitored the output with an oscilloscope.
*And another problem. *
Due to the problems with the CAN bus I tried to make a kernel and
boatloader update.
But I get the following error message.
debian@beaglebone:/opt/scripts/tools$ git pull
fatal: unable to access 'https://github.com/RobertCNelson/boot-scripts/':
server certificate verification failed. CAfile:
/etc/ssl/certs/ca-certificates.crt CRLfile: none
debian@beaglebone:/opt/scripts/tools$
many thanks in advance and have a nice day @ all
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