I need some help with the CAN driver, and below is some information.
I'm working on a small project that is connecting the CAN MCP2515 into Raspberry Pi which is running AGL OS.
These are some information:
- AGL OS: lamprey snapshot version 12.1.0 (I downloaded from this on 3rd June) https://download.automotivelinux.org/AGL/snapshots/lamprey/latest/raspberrypi4/deploy/images/raspberrypi4-64/
- Raspberry Pi 4 - 2GB RAM
- I ignored all download commands with `apt-install` due to on AGL we could not use those commands.
I just focus on these commands:
dtparam=spi=on
dtoverlay=mcp2515-can0,oscillator=8000000,interrupt=25
dtoverlay=spi-bcm2835
dtoverlay=spi-dma
But when I added them into the /boot/config.txt file, my Raspberry Pi could not boot up. The display or the yellow led (next to the red power led) didn't work as normally -> I could not use the `dmesg` command to check what was happened :( .
But, if I only enable spi with command: `dtparam=spi=on` . The raspberry could boot up but it didn't recognize the MCP2515 CAN module when I connected.
To know why it didn't recognize, the tutorial mentioned that it has to create this folder: /sys/bus/spi/devices/spi0.0/net/can0
If I tried with Raspbian OS, it works perfectly when I connect the CAN module as tutorial.
The question is, how can I add 3 commands left into `/boot/config.txt`. I'm i wrong or do we have other ways to install a driver or something to communicate with the CAN module?
I need your help or some tutorial or some guideline about this topic.
### SOME NEW UPDATE
I found out mcp251x in the OS system by modinfo but could not insmod it.
But when I check why in dmesg, I installed some dependency components (can_raw, can_dev, can) with insmod. Then i could insmod mcp251x without get error anymore.
I also added the dependency components in the modules file in /etc/modules (which i created) to help the module can be loaded while booting up.
But I still get the error when added the dtoverlay mcpcan :(
This is some information logging when RPI could not boot by UART terminal
U-Boot 2021.07 (Dec 01 2021 - 22:21:40 +0000)
DRAM: 3.7 GiB
RPI 4 Model B (0xc03114)
MMC: mmcnr@7e300000: 1, emmc2@7e340000: 0
Loading Environment from FAT... OK
In: serial
Out: serial
Err: serial
Net: eth0: ethernet@7d580000
PCIe BRCM: link up, 5.0 Gbps x1 (SSC)
starting USB...
Bus xhci_pci: probe failed, error -110
No working controllers found
Hit any key to stop autoboot: 0
switch to partitions #0, OK
mmc0 is current device
ERROR : xrealloc failedht2
Thank you!
Best regard,
Anh Quan
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