Good evening
after my successful test of activating the I2S on the hat40 connector and the first test of the PCM5102 dac I decided to set up a small ultra simple sound server with LMS to power an amplifier associated with its speakers
To start I had this assembly
Hello, i have found this thread and would like to ask you something. In order for pcm5102 to work it needs to be also communicating on i2c? Or why is sck pin connected to i2c pin on orange pi? Or this pin is used for something else? Maybe if you know how it is configured in dts file would be helpfull. Thanks
More info here about the OPI CM4 with a custom dtb file
The PCM5102 just need a i2s bus and i put for my pcm5102a somme connection with the hat
PI0 → I2S SCK–>pin29
PI1 → I2S BCK–>pin12
PI2 → I2S LCK–>pin35
PI3 → I2S DATA–>pin40
5V → to VIN power of DAC board–>pin4
GND → to GND power of DAC board–>pin6
Hello all @MichaIng , after some days with the orangepi zero2w for implementation of i2s
I’m be back with my OPI CM4 with a fresh image of OPI 3B with Dietpi 9.13.2(beta)
The deal, create a script initiated by MichaIng to implement i2s1 on this board with
a overlay-user and deployed it to have sound on a PCM5102A dac board connected
via the 40pin connector
The script
# Create the directory for user overlays
mkdir -p /boot/overlay-user
cd /boot/overlay-user
# Create the overlay source file
cat << '_EOF_' > i2s1.dts
/dts-v1/;
/plugin/;
/ {
compatible = "rockchip,rk3566";
fragment@0 {
target-path = "/";
__overlay__ {
my_soundcard {
compatible = "simple-audio-card";
simple-audio-card,name = "PCM5102A";
simple-audio-card,format = "i2s";
status="okay";
simple-audio-card,cpu {
sound-dai = <&i2s1_8ch>;
//dai-tdm-slot-num = <2>;
//dai-tdm-slot-width = <32>;
};
simple-audio-card,codec {
sound-dai = <&codec_dummy>;
};
};
codec_dummy: codec_dummy {
compatible = "rockchip,dummy-codec";
#sound-dai-cells = <0>;
status = "okay";
};
};
};
fragment@1 {
target = <&i2s1_8ch>;
__overlay__ {
#sound-dai-cells = <0>;
rockchip,clk-trcm = <1>; //0: both tx_lrck/bclk and rx_lrck/bclk are used; 1: only tx_lrck/bclk is used; 2: only rx_lrck/bclk is used
pinctrl-0 = <&i2s1m1_sclktx &i2s1m1_lrcktx &i2s1m1_sdo0 &i2s1m1_sdi0>;
rockchip,playback-channels = <2>;
rockchip,capture-channels = <2>;
status = "okay";
};
};
fragment@2{
target = <&i2s2_2ch>;
__overlay__ {
status = "disabled";
};
};
fragment@3{
target-path = "/";
__overlay__ {
hdmi-sound{
status = "disabled";
};
};
};
fragment@4{
target-path = "/";
__overlay__ {
sound {
compatible = "simple-audio-card";
simple-audio-card,name = "PCM5102A";
};
};
};
};
_EOF_
# Install the device tree compiler
apt install device-tree-compiler
# Compile the overlay binary file
dtc -I dts -O dtb -o i2s1.dtbo -@ i2s1.dts
# To see the result of the compiler uncommit next line
#fdtdump i2s1.dtbo
# Enable the user overlay via U-Boot environment file
G_CONFIG_INJECT 'user_overlays=' 'user_overlays=i2s1' /boot/dietpiEnv.txt
In a terminal just a few command when you are connected
sudo nano i2s1.sh
Copy and past the script
Ctrl+o to write the line and Ctrl+x to save and exit
