Korg Volca Sample 2 Custom Firmware

Signal Chain: STM32 I2S2 -> PCM1755 -> LMV324 *3 (Bass/Treble Control) -> TPA2005D

Pinout:

PCM1754_SCK_GPIO        GPIOC
PCM1754_SCK_GPIO_PIN    6
PCM1754_DATA_GPIO       GPIOB
PCM1754_DATA_GPIO_PIN   15
PCM1754_BCK_GPIO        GPIOB
PCM1754_BCK_GPIO_PIN    13
PCM1754_LRCK_GPIO       GPIOB
PCM1754_LRCK_GPIO_PIN   12
PCM1754_MUTE_GPIO       GPIOC
PCM1754_MUTE_GPIO_PIN   7

TPA2005D_SHUTDOWN_GPIO       GPIOC
TPA2005D_SHUTDOWN_GPIO_PIN   11

Install the debug LED18 near the microprocessor. The LED is coneccted  to IO PB0.

The system has a power management unit which will malfunction durine the debug, so the microprocessor need extra power supply.

• Red: Power Supply +3.3V
• Yellow: SWD_IO
• Green: SWD_CLK
• White: SWD_SWO
• Black: GND