[参考译文] TLV320AIC3204EVM-K：CAN&#39；t 从编解码器中获取声音

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https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1521800/tlv320aic3204evm-k-can-t-get-sound-out-of-the-codec

工具/软件：

您好！

我用手将编解码器板从 TLV320评估套件连接到我的 Nordic Semiconductor 处理器 Devkit、以测试编解码器、到目前为止、我完全无法使其发出声音、除非耳机初始化时出现爆裂声。我将从电源将3.3V 电压馈入3.3V 网络并馈入 HPVDD/LDOIN、我可以确保开关和所有条件都已正确设置、以将内部 LDO 用于 DVDD 和 AVDD。如果我使用万用表测量电路板上的一些点：LDO_SEL ~3.3V、IOVDD ~3.3V、DVDD 为1.708V、AVDD 为1.704V。大多数情况下、我都通过 I2C 成功与 IT 进行通信、但在某些加电时出现了写入或回读故障。

我尝试将其配置为在没有 PLL 的6.144MHz MCLK 信号的情况下以48kHz 运行、然后使用蜂鸣发生器发出一些声音、即使只有 I2C 命令和时钟输入正常、但迄今为止仍然没有。

我已经尝试过移动配置命令、以便它们发生在 MCLK 处于活动状态之前或之后、现在我可以在 MCLK 切换一段时间后全部发生。

相关设置代码位于下面的代码块中、我附加了一个 Saleae 捕获、显示了所有信号的运行情况(I2C、MCLK、BCLK、LRCLK (WCLK)、DIN、复位)。

请帮助！我试图尽快使其正常工作、以验证我们的硬件设计。

谢谢、

Glen

   k_sleep(K_MSEC(1000));

   retcode |= tlv320_write(0, 0x01, 0x01);  // Software reset

   k_sleep(K_MSEC(100));

   // === CLOCK SETUP for MCLK = 6.144 MHz ===
   // We will use MCLK directly, so PLL is not needed
   while (tlv320_write(0, 0x04, 0x00));  // CODEC_CLKIN = MCLK

   // NDAC = 1, MDAC = 2 for 6.144 MHz -> 48 kHz with DOSR = 128
   while (tlv320_write(0, 0x0B, 0x01));  // NDAC = 1
   while (tlv320_write(0, 0x0C, 0x01));  // MDAC = 1
   while (tlv320_write(0, 0x0D, 0x00));  // DOSR MSB = 0
   while (tlv320_write(0, 0x0E, 0x80));  // DOSR LSB = 128

   // Interface settings
   while (tlv320_write(0, 0x1B, 0x00));  // I2S, 16-bit word length
//   while (tlv320_write(0, 0x1D, 0x01);  // low bits: 00: BDIV_CLKIN = DAC_CLK, 01: BDIV_CLKIN = DAC_MOD_CLK
   while (tlv320_write(0, 0x3C, 0x08));  // DAC processing block = PRB_P8

   // Enable Master Analog Power:
   while (tlv320_write(1, 0x01, 0x08));  // Disable crude AVDD

   // Enable internal LDO:
   while (tlv320_write(1, 0x02, 0x01));  // Enable AVDD LDO with analog blocks powerered up

   while (tlv320_write(1, 0x7B, 0x01));  // REF charging time = 40ms
   while (tlv320_write(1, 0x14, 0x25));  // HP soft stepping config  
   while (tlv320_write(1, 0x0A, 0x00));  // Common mode settings

   // Route DAC outputs
   while (tlv320_write(1, 0x0C, 0x08));  // Route Left DAC to HPL
   while (tlv320_write(1, 0x0D, 0x08));  // Route Right DAC to HPR

   // Class AB amplifier setup
   while (tlv320_write(1, 0x03, 0x00));  // PTM mode for DAC
   while (tlv320_write(1, 0x04, 0x00));

   // Set output volume
   while (tlv320_write(1, 0x10, 0x14));  // HPL gain = 10dB
   while (tlv320_write(1, 0x11, 0x14));  // HPR gain = 10dB   
   while (tlv320_write(1, 0x09, 0x30));  // Power up HPL and HPR drivers

   k_sleep(K_MSEC(2500));     // TLV320 app guide says to wait 2.5 seconds for soft stepping to take effect to avoid pops

   // Page 0 DAC power-up
   while (tlv320_write(0, 0x3F, 0xD6));  // Power up both DACs, route L/R channels
   
   while (tlv320_write(0, 0x40, 0x00));  // Unmute DAC

   // Test beep
   LOG_ERR("TLV320 BEEP START");
   retcode |= tlv320_quick_write(0, 0x49, 0x5F);  // MSB
   retcode |= tlv320_quick_write(0, 0x4A, 0x00);  // MID
   retcode |= tlv320_quick_write(0, 0x4B, 0x00);  // LSB      
   retcode |= tlv320_quick_write(0, 0x48, 0x00);
   retcode |= tlv320_quick_write(0, 0x47, 0x80);   
}

e2e.ti.com/.../InitWithNoSound2.zip

3 个月前