- 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)
- Sipeed Longan Nano: 64KB Flash/20KB SRAM
- Multi-byte string file name
- Unicode Tag information
- Fast Forward / Fast Rewind
- Gapless playback
- Edit board_conf.h to choose your board
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
Both ES9023 and PCM5102 are supported without selection.
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.
- 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)
- Up/Down button for volume up/down
- Center 1 click to pause/play
- Center 2 click to stop (go back to FileView Mode)
- Long push Center button
Sipeed_Longhan_Nano_WAV_Player_schematic.pdf
- 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
- Put "logo.bin" on root Folder
- File Format: 160 Pixels x 80 Pixels RGB565 Binary format
- logo.bin example
- Put "lilygo_logo.bin" on root Folder
- File Format: 240 Pixels x 135 Pixels x n Frames RGB565 Binary format
- lilygo_logo.bin example
