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products:sbc:vim4:applications:gpio:i2s

VIM4 I2S

Introduction

This page introduces the usage of I2S bus on 40-Pin Header.

I2S Information

PIN GPIO Name GPIO Number
VIM3/3L 29 (BCK) PIN.A1 477
31 (DATA) PIN.A3 479
32 (LRCK) PIN.A2 478
28 (GND) GND
1 (VCC) 5V
VIM4 29 (BCK) PIN.T1 447
31 (DATA) PIN.T3 449
32 (LRCK) PIN.T2 448
28 (GND) GND
1 (VCC) 5V
VIM1S 29 (BCK) PIN.Z1 499
31 (DATA) PIN.Z2 500
32 (LRCK) PIN.Z0 498
28 (GND) GND
1 (VCC) 5V

Enable I2S

In order to use the I2S, you need to enable the I2S function via Device Tree Overlay.

To enable I2S, you need to add i2s to node fdt_overlays if it doesn't exist.

VIM3/3L

For VIM3, edit /boot/dtb/amlogic/kvim3.dtb.overlay.env to add i2s node to fdt_overlays node if it doesn't exist.

For VIM3L, edit /boot/dtb/amlogic/kvim3l.dtb.overlay.env to add i2s node to fdt_overlays node if it doesn't exist.

e.g.

fdt_overlays=i2s

After reboot, you can connect your i2s device to corresponding pins.

VIM4

Edit /boot/dtb/amlogic/kvim4.dtb.overlay.env to add i2s node to fdt_overlays node if it doesn't exist.

e.g. To enable I2S, you need to add i2s to node fdt_overlays if it doesn't exist.

fdt_overlays=i2s

After reboot, you can connect your i2s device to corresponding pins.

VIM1S

Edit /boot/dtb/amlogic/kvim1s.dtb.overlay.env to add i2s node to fdt_overlays node if it doesn't exist.

e.g. To enable I2S, you need to add i2s to node fdt_overlays if it doesn't exist.

fdt_overlays=i2s

After reboot, you can connect your i2s device to corresponding pins.

I2S Usage

$ aplay -l                # find your i2s card and play audio using it
$ aplay -D hw:0,0 <audio_file>.wav # replace 0,0 with i2s interface (card,device)
2024/07/04 05:13 · sravan
Last modified: 2024/07/04 05:20 by sravan