[分享] 普中科技F28335开发板的TLV320AIC23 芯片初始化

准音频算法工程师 2024-8-24 22:53 楼主

我不懂这段商家提供的代码：

void main()

{
AIC23Write(0x00,0x00);
   Delay(100);
   AIC23Write(0x02,0x00);
   Delay(100);
   AIC23Write(0x04,0x7f);
   Delay(100);
   AIC23Write(0x06,0x7f);
   Delay(100);
   AIC23Write(0x08,0x14);
   Delay(100);
   AIC23Write(0x0A,0x00);
   Delay(100);
   AIC23Write(0x0C,0x00);
   Delay(100);
   AIC23Write(0x0E,0x43);
   Delay(100);
   AIC23Write(0x10,0x23);
   Delay(100);
   AIC23Write(0x12,0x01);
   Delay(100);       //AIC23Init
}

Uint16 AIC23Write(int Address,int Data)
{

if (I2caRegs.I2CMDR.bit.STP == 1)
{
return I2C_STP_NOT_READY_ERROR;
}

// Setup slave address
I2caRegs.I2CSAR = 0x1A;

// Check if bus busy
if (I2caRegs.I2CSTR.bit.BB == 1)
{
return I2C_BUS_BUSY_ERROR;
}

// Setup number of bytes to send
// MsgBuffer + Address
I2caRegs.I2CCNT = 2;
I2caRegs.I2CDXR = Address;
I2caRegs.I2CDXR = Data;
// Send start as master transmitter
I2caRegs.I2CMDR.all = 0x6E20;
return I2C_SUCCESS;

}

根据注释，应该就是TLV320AIC23 芯片的初始化代码，但是我不是很能理解其中的含义。对照芯片资料的寄存器映射，发现不能和代码一一对应。比如AIC23Write(0x0A,0x00); 0x0A对应的二进制是1010，并不能在寄存器映射中找到这样的地址。
噢噢，我明白了。地址只有7位，是我输入16进制转2进制的高七位。原来如此，这下代码能和寄存器地址一一对应了。

本帖最后由准音频算法工程师于 2024-8-25 11:31 编辑

回复评论（7）

沙发 tagetage

AIC23Write(0x00,0x1f);//左声道输入音量
                     Delay(100);
               AIC23Write(0x02,0x1f);//右声道输入音量
               Delay(100);
                     AIC23Write(0x04,0xBf);//左声道输出音量
                     Delay(100);
               AIC23Write(0x06,0xBf);//右声道输出音量
                     Delay(100);
                     AIC23Write(0x08,0x12);//DAC选择，lin输入//AIC23Write(0x08,0x14);//DAC选择，MIC输入
                     Delay(100);
               AIC23Write(0x0A,0x00);
                     Delay(100);
                     AIC23Write(0x0C,0x00);
                     Delay(100);
                     AIC23Write(0x0E,0x43);//AIC23Write(0x0E,0x43);//数字音频接口格式控制，AIC23主模式，dsp初始化，转换比特值设定00即：16bit--》96dB
                     Delay(100);
                     AIC23Write(0x10,0x23);//AIC23Write(0x10,0x23);//设置采样率为16khz；USB模式下时钟为12mhz，采样率为12/272=44.1Khz
                     Delay(100);
               AIC23Write(0x12,0x01);//激活标志
                     Delay(100);             //AIC23Init