我的beaglebone口袋有问题，我需要帮助。我尝试用MCP2551收发器设置can0。我加载了BB-CAN0-00A0.dtbo和BB-CAN1-00A0.DTBO，但我在/ sys / class / net中没有设备，而设备can0和can1不存在。
这是我的version.sh日志
git:/opt/scripts/:[73593ebe3b7d3cc381eeb502d45ccb33a6ec5e78]
eeprom:[A335PBGL00A21748EPB00201]
model:[TI_AM335x_PocketBeagle]
dogtag:[BeagleBoard.org Debian Image 2018-08-30]
bootloader:[microSD]:[/dev/mmcblk0]:[U-Boot 2018.03-00002-gac9cce7c6a]:[location: dd MBR]
kernel:[4.14.67-ti-r73]
nodejs:[v6.14.4]
uboot_overlay_options:[enable_uboot_overlays=1]
uboot_overlay_options:[uboot_overlay_addr4=/lib/firmware/BB-CAN0-00A0.dtbo]
uboot_overlay_options:[uboot_overlay_addr5=/lib/firmware/BB-CAN1-00A0.dtbo]
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:[bb-cape-overlays]:[4.4.20180803.0-0rcnee0~stretch+20180804]
pkg:[bb-wl18xx-firmware]:[1.20180517-0rcnee0~stretch+20180517]
pkg:[kmod]:[23-2rcnee1~stretch+20171005]
pkg:[librobotcontrol]:[1.0.2-git20180829.0-0rcnee0~stretch+20180830]
pkg:[firmware-ti-connectivity]:[20170823-1rcnee1~stretch+20180328]
groups:[debian : debian adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal i2c bluetooth netdev cloud9ide gpio pwm eqep admin spi tisdk weston-launch xenomai]
cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 quiet]
dmesg | grep pinctrl-single
[ 1.148050] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568
[ 1.241720] pinctrl-single 44e10800.pinmux: pin PIN95 already requested by ocp:P1_28_pinmux; cannot claim for 481cc000.can
[ 1.253051] pinctrl-single 44e10800.pinmux: pin-95 (481cc000.can) status -22
[ 1.260180] pinctrl-single 44e10800.pinmux: could not request pin 95 (PIN95) from group pinmux_dcan0_pins on device pinctrl-single
[ 1.280383] pinctrl-single 44e10800.pinmux: pin PIN97 already requested by ocp:P2_09_pinmux; cannot claim for 481d0000.can
[ 1.291556] pinctrl-single 44e10800.pinmux: pin-97 (481d0000.can) status -22
[ 1.298668] pinctrl-single 44e10800.pinmux: could not request pin 97 (PIN97) from group pinmux_dcan1_pins on device pinctrl-single
dmesg | grep gpio-of-helper
[ 1.156291] gpio-of-helper ocp:cape-universal: ready
END
和我的/boot/uEnv.txt：
uname_r=4.14.67-ti-r73
#uuid=
#dtb=
###U-Boot Overlays###
###Documentation: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays
###Master Enable
enable_uboot_overlays=1
###
###Overide capes with eeprom
#uboot_overlay_addr0=/lib/firmware/.dtbo
#uboot_overlay_addr1=/lib/firmware/.dtbo
#uboot_overlay_addr2=/lib/firmware/.dtbo
#uboot_overlay_addr3=/lib/firmware/.dtbo
###
###Additional custom capes
uboot_overlay_addr4=/lib/firmware/BB-CAN0-00A0.dtbo
uboot_overlay_addr5=/lib/firmware/BB-CAN1-00A0.dtbo
#uboot_overlay_addr6=/lib/firmware/.dtbo
#uboot_overlay_addr7=/lib/firmware/.dtbo
###
###Custom Cape
#dtb_overlay=/lib/firmware/.dtbo
###
###Disable auto loading of virtual capes (emmc/video/wireless/adc)
#disable_uboot_overlay_emmc=1
#disable_uboot_overlay_video=1
#disable_uboot_overlay_audio=1
#disable_uboot_overlay_wireless=1
#disable_uboot_overlay_adc=1
###
###PRUSS OPTIONS
###pru_rproc (4.4.x-ti kernel)
#uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-4-TI-00A0.dtbo
###pru_rproc (4.14.x-ti kernel)
uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-14-TI-00A0.dtbo
###pru_uio (4.4.x-ti, 4.14.x-ti & mainline/bone kernel)
#uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo
###
###Cape Universal Enable
enable_uboot_cape_universal=1
###
###Debug: disable uboot autoload of Cape
#disable_uboot_overlay_addr0=1
#disable_uboot_overlay_addr1=1
#disable_uboot_overlay_addr2=1
#disable_uboot_overlay_addr3=1
###
###U-Boot fdt tweaks... (60000 = 384KB)
#uboot_fdt_buffer=0x60000
###U-Boot Overlays###
cmdline=coherent_pool=1M net.ifnames=0 quiet
#In the event of edid real failures, uncomment this next line:
#cmdline=coherent_pool=1M net.ifnames=0 quiet video=HDMI-A-1:1024x768@60e
#Use an overlayfs on top of a read-only root filesystem:
#cmdline=coherent_pool=1M net.ifnames=0 quiet overlayroot=tmpfs
##enable Generic eMMC Flasher:
##make sure, these tools are installed: dosfstools rsync
#cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh
如果您有任何建议，我不明白我的配置有什么问题。
谢谢
cape-universal可能与您尝试加载的叠加层冲突。比如在这种情况下。
一条可能的路线是禁用cape-universal。另一个选择可能是尝试在运行时设置。对于不会改变前者的静态硬件设置更为可取。
请注意，BBB的默认图像不断发展，因此这不是一个普遍的答案。