gd32v_WAV_Player

Features

Supported

• Sipeed Longan Nano: 128KB Flash/32KB SRAM
• Lilygo TTGO T-Display-GD32: 128KB Flash/32KB SRAM
• ES9023 24bit I2S Audio DAC
• PCM5102 32bit I2S Audio DAC
• exFAT MicroSD (up to 512GB)
• 44.1KHz 16bit Stereo WAV File
• Tag information by LIST chunk in WAV File
• Cover Art display by RGB565 binary format file
• Folder/File navigation by ASCII order
• Control by Android Headphone button (3 buttons)
• Volume by utilizing DAC 24bit/32bit range for playing 16bit Audio data
• Album unit random play by time out after play finish (Assuming [Artist Folder]/[Album Folder] structure)
• Resume playback
• Battery voltage check (Optional: external circuit needed)

Not supported

• Sipeed Longan Nano: 64KB Flash/20KB SRAM
• Multi-byte string file name
• Unicode Tag information
• Fast Forward / Fast Rewind
• Gapless playback

Board Configuration

• Edit board_conf.h to choose your board

Pin Assignment

In addition to original connection

Longan Nano Pin	Function	Connection
PA0	ADC0_CH0	from Android Head Phone MIC (Button)
PA3	ADC1_CH3	from Battery Voltage
PA8	CK_OUT0	to ES9023 MCLK (13)
PA15	I2S2_WS	to ES9023 LRCK (2) / to PCM5102 LRCK (15)
PB3	I2S2_CK	to ES9023 BCK (1) / to PCM5102 BCK (13)
PB5	I2S2_SD	to ES9023 SDI (3) / to PCM5102 DIN (14)
PB6	GPIO	to ES9023 MUTE_B (15) / to PCM5102 XSMT (17)
PB7	TIM3_CH1	to LCD Backlight PWM Control (modify Longan Nano)
PB8	GPIO	to Battery Check
PB10	TIM1_CH2	to LCD Backlight PWM Control (Lilygo GD32)
PC14	GPIO	to Power Keep

tie PCM5102 SCK (12) to low

I2S DAC

Both ES9023 and PCM5102 are supported without selection.

PCM5102 Board Setting

Button Control Guide

Connect MIC pin of Android headphone remote control with 3 buttons to PA0 pin of Longan Nano. PA0 also needs to be pulled-up by 2.2Kohm from 3.3V. See schematic for detail.

FileView Mode

• Up/Down button to go up/down for file selection
• Center 1 click to get into the folder
• Center 1 click to play WAV file (go to Play Mode)
• Center 2 click to go parent folder
• Center 3 click to random album play (go to Play Mode)

Play Mode

• Up/Down button for volume up/down
• Center 1 click to pause/play
• Center 2 click to stop (go back to FileView Mode)

Power On/Off (Optional: external circuit needed)

• Long push Center button

Schematic

Sipeed_Longhan_Nano_WAV_Player_schematic.pdf

Cover Art File

• Put "cover.bin" on each Album Folder
• File Format: 80 Pixels x 80 Pixels RGB565 Binary format
• cover.bin example
• Use jpg2bin.py to convert into cover.bin

Opening Logo File

Sipeed Longan Nano

• Put "logo.bin" on root Folder
• File Format: 160 Pixels x 80 Pixels RGB565 Binary format
• logo.bin example

Lilygo TTGO T-Display-GD32

• Put "lilygo_logo.bin" on root Folder
• File Format: 240 Pixels x 135 Pixels x n Frames RGB565 Binary format
• lilygo_logo.bin example

Prototype Example

Portable WAV Player (Sipeed Longan Nano with ES9023)

Scene2 Scene3

Sipeed Longan Nano with PCM5102

Lilygo TTGO T-Display-GD32

Scene6