[参考译文] TLV320DAC3101：使用 ESP32和 TLV320DAC3101连接、初始化和播放 I2S

我想通过 I2C 和 I2S 连接 ESP32-WROVER-IE 芯片和 TLV320DAC3101、以通过 SPL 播放 WAV 声音文件。

[I2S 启动]

void TLV320DAC3101::initI2S() {
   static const i2s_config_t i2s_config = {
      .mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_TX),
      .sample_rate = 44100,
      .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT, 
      .channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT,
      .communication_format = I2S_COMM_FORMAT_I2S,
      .intr_alloc_flags = 0,
      .dma_buf_count = 8,
      .dma_buf_len = 64,
      .use_apll = false,
      .tx_desc_auto_clear = true
   };
   static const i2s_pin_config_t pin_config = {
      .bck_io_num = PIN_DAC_BCLK,
      .ws_io_num = PIN_DAC_WCLK,
      .data_out_num = PIN_DAC_DIN,
      .data_in_num = I2S_PIN_NO_CHANGE
   };
   i2s_driver_install(I2S_NUM, &i2s_config, 0, NULL);
   i2s_set_pin(I2S_NUM, &pin_config);
}

int TLV320DAC3101::begin()
{
   initI2S();

   setRegister(0, 1, 1); // Soft reset
   vTaskDelay(pdMS_TO_TICKS(20));

   setRegister(0, 0x04, 0x07); // MCLK->BCLK, CODEC_CLKIN: PLL_CLK
   
   //	{ 1411200,  44100,	2, 32,   0,	128,   8,  2,	128,   8,  2},
   setRegister(0, 0x05, 0x92); // PLL P and R Values : P=1, R=2 *
   vTaskDelay(pdMS_TO_TICKS(10)); // PLL Power up time
   setRegister(0, 0x06, 0x20); // PLL J-Value : 32 *
   setRegister(0, 0x07, 0x00); // PLL D-HIGH-Value : 0 *
   setRegister(0, 0x08, 0x00); // PLL D-LOW-Value : 0 *
   setRegister(0, 0x0b, 0x88); // DAC NDAC_VAL : divide by 8
   setRegister(0, 0x0c, 0x82); // DAC MDAC_VAL : divide by 2
   setRegister(0, 0x0d, 0x00); // DAC DOSR_VAL MSB : 0 *
   setRegister(0, 0x0e, 0x80); // DAC DOSR_VAL LSB : 128 *
   setRegister(0, 0x1b, 0x00); // Codec Interface Control 1 : I2S, 16bits, BCLK/WCLK Input

   setRegister(0, 0x36, 0x02); // DIN (IN Pin) Control : enabled

   setRegister(0, 0x3c, 0x0b); // Processing Block : 25 

   setRegister(8, 0x01, 0x04); // DAC Coefficient RAM Control (continued) : 4 
   setRegister(1, 0x21, 0x00); // HP Output Drivers POP Removal Settings

   setRegister(0, 0x74, 0x00);

   setRegister(1, 0x23, 0x44); 

   setRegister(1, 0x20, 0xC6); 
   setRegister(1, 0x2A, 0x1C);
   setRegister(1, 0x2B, 0x1C);

   setRegister(1, 0x26, 0x80); 
   setRegister(1, 0x27, 0x80); 
   
   setRegister(0, 0x3F, 0xFD); 
   setRegister(0, 0x41, 0x00);
   setRegister(0, 0x42, 0x00);
   setRegister(0, 0x40, 0x00);

   vTaskDelay(pdMS_TO_TICKS(1000));

   return 1;
}