AOM-3841 AUDIO MIC1/OUT1

AOM-3841 supports three kinds of sound cards:

“1 rt5640-codec”(9696EG57001)
“2 hdmi”,
“3 dp0

Set the default audio output when playing media files.
1. Click “Applications” ->”Multimedia”->”PulseAudio Volume Control”.
2. Select “Build-in Audio stereo” for rt5640-codec output, or select “HDMI” for  HDMI output, or select “Build-in Audio Display Port 1 Stereo” for DP output.

Mute and Volume Control
Mute and volume can be configured by GUI.

AUDIO MIC1/OUT1（Compatible with ROM-EG57）

HW Pin Header

I2S0 Connector Pin Definition
Pin	Signal	I/O	Description
1	I2S0_VDDA		I2S0 3.3V source
2	GND		Ground
3	I2S0_VDDA		I2S0 3.3V source
4	I2S0_SDIN_3.3	I	I2S0 Serial Data IN 3.3V Level
5	I2S0_SDOUT_3.3	O	I2S0 Serial Data OUT 3.3V Level
6	I2S0_LRCK_3.3	I	I2S0 Left/Right Clock
7	I2S0_BCLK_3.3	I	I2S0 Bit Clock
8	AUD0_MCK	I	Audio0 Master Clock
9	N/A		Not Applicable
10	GND		Ground
11	I2S0_I2C_CLK	I	I2S0 I2C clock input from host.
12	MIC_BIAS1	I	For I2S0 Microphone Bias Voltage
13	I2S0_I2C_DAT	I/O	I2S0 I2C Data
14	GND		Ground
15	N/A		Not Applicable
16	I2S0_HP_R	I	I2S0 Right Headphone
17	I2S0_MIC_IN	I	I2S0 Microphone IN
18	GND		Ground
19	GND		Ground
20	I2S0_HP_L	I	I2S0 Left Headphone

Get sound card ID

# cat /proc/asound/cards
0 [rockchiprt5640c]: simple-card - rockchip,rt5640-codec
 rockchip,rt5640-codec
1 [rockchipdp0 ]: rockchip-dp0 - rockchip-dp0
 rockchip-dp0
2 [rockchiphdmi ]: rockchip-hdmi - rockchip-hdmi
 rockchip-hdmi

Record

Take Card ID 0 for example:

# CARD_ID=0
# arecord -c 2 -Dplughw:$CARD_ID,0 -f S16_LE -r 16000 -d 10 -t wav 
test.wav  

Playback.

Take Card ID 0 for example:

# CARD_ID=0
# arecord -c 2 -Dplughw:$CARD_ID,0 -f S16_LE -r 16000 -d 10 -t wav 
test.wav

See details of the usage of “aplay”: 

# aplay --help
… …
-D, --device=NAME select PCM by name
-t, --file-type TYPE file type (voc, wav, raw or au)
… …

RKTool指令：

# cat /proc/asound/cards
# /tools/test/adv/audio/audio_record_test.sh 0
# /tools/test/adv/audio/audio_play_test.sh 0