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INSTALL.md

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Device Driver Install Manual

Prerequisites

  • Kernel Source
  • dtc (Device Tree Compiler)
  • GCC 4.9.2 (to matching for running linux kernel image)

Getting Kernel Source

Install "rpi-source" software.
The "rpi-source" command automaticaly downloads the kernel source that matched running linux kernel version.

https://github.com/notro/rpi-source/wiki

to install:

sudo wget https://raw.githubusercontent.com/notro/rpi-source/master/rpi-source -O /usr/bin/rpi-source && sudo chmod +x /usr/bin/rpi-source && /usr/bin/rpi-source -q --tag-update

Getting dtc (Device Tree Compiler) package

Install dtc by package system.

sudo apt-get install device-tree-compiler

Install bc command

If bc is not installed, must install bc.

sudo apt-get install bc

Getting GCC-4.9.2 package (Kernel Version : ~ 4.1.17+)

Install GCC-4.9.x by package system.

sudo apt-get install gcc-4.9 g++-4.9

Check GCC version is 4.9.x.

gcc --version

Check gcc version to build the running linux kernel image.

cat /proc/version

Driver Install

1. Get the kernel source

Choose place of kernel source files & directory, e.g. '.' current folder.

rpi-source -d .

2. Pull driver source files

git clone https://github.com/audiophonics/I-Sabre-K2M

3. Build & Install driver & dtb (device tree blob)

cd ./I-Sabre-K2M
make
sudo make modules_install
make dtbs
sudo make install_dtbo

4. Change /boot/config.txt

Add following lines.

dtoverlay=i-sabre-k2m
dtparam=i2c_arm=on

5. Reboot Raspberry Pi

6. Check driver is normaly installed

Use aplay -l command to check audio card is added.

aplay -l

Installed audio card is follows.

card xxx: DAC [I-Sabre K2M DAC], device 0: I-Sabre K2M DAC i-sabre-k2m-dai-0 []