BPI-R1 CAN Bus

In order to port can4linux to the BananaPi, the CAN module description is needed from the A20 hardware manual. can4linux is a character-driver-based Linux driver used already on desktop PCs and embedded platforms like Freescale FlexCAN (the i.MX series of micro controllers) or Xiliny Zynq.
There is a more detailed document about CAN on the A20 at https://dl.linux-sunxi.org/A20/CAN Bus1.pdf​
This is a tutorial for using CAN BUS on bananapi with bananian 15-01
Thank selqcir share this example:
Download and install "bananian-1501.img" into 8 GB SDCard.
Expand the root file system using "bananian-config"
Install missing package:
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apt-get install git
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apt-get update
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apt-get upgrade
4
reboot
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Get last bananian available, and continu to install missing package:
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git clone https://github.com/Bananian/linux-bananapi
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apt-get install build-essential u-boot-tools uboot-mkimage 
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apt-get install libusb-1.0-0 libusb-1.0-0-dev git wget fakeroot kernel-package zlib1g-dev libncurses5-dev
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apt-get install subversion
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Build kernel:
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cd linux-bananapi
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make menuconfig
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Exit without saving when menu appears
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zcat /proc/config.gz > /root/linux-bananapi/.config
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make uImage modules
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make INSTALL_MOD_PATH=output modules_install
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At this step, kernel should be compiled and "Module.symvers" should be available
Then rename modules and firmware provide by Bananian, and replace by the new one.
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mv /lib/modules /lib/modules.old
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mv /lib/firmware /lib/firmware.old
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mv /root/linux-bananapi/output/lib/modules /lib/modules
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mv /root/linux-bananapi/output/lib/firmware /lib/firmware
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Same for uImage:
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mount /dev/mmcblk0p1 /mnt 
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cd /mnt
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mv uImage uImage.old
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mv /root/linux-bananapi/arch/arm/boot/uImage /mnt
5
reboot
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Create link for further build:
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cd /lib/modules/3.4.104/
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ln -s /root/linux-bananapi build
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cd ~
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Get Can4Linux and build it:
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svn checkout https://svn.code.sf.net/p/can4linux/code/trunk can4linux-code
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cd /root/can4linux-code/can4linux/
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make TARGET=BANANAPI
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Install module for each startup of the board:
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insmod can4linux.ko
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cp can4linux.ko /lib/modules/3.4.104/kernel/net/can/
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depmod -A -v
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modprobe -v can4linux
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echo "" >> /etc/modules ; echo "can4linux" >> /etc/modules
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reboot
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Build CAN example
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apt-get install swig
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apt-get install python-dev
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cd can4linux-code/can4linux-examples/
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Update CAN speed and device in file "pyCan-example.py"
ex:
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# setting the device number
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device = 0
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defaultBaudrate = '250'
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Connect CAN transceiver and CAN bus, and check with for example:
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   python pyCan-example.py
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That's all
With this method, kernel version is "Linux bananapi 3.4.104" instead of "Linux bananapi 3.4.104+", because i was unable to find same sources than Bananian 15-01 , but CAN bus work !
Feel free to comment or update.

BPI-R1 quick start

BPI-R1 Linux software

Last modified 2yr ago

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