I2S.rar_I2S全双工_i2s 全双工_stm32f4 I2S_全双工I2S_本田f4i配置

      #include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "wm8711.h"
#include "pcm1870.h"
#include "eeprom.h"
#include "wm8978.h"
/*--------------------------------------
--------音频DAC I2S3 引脚 PA15 PB3 PB5--
---------PB6 PB7 wm8711 IIC配置引脚 ----	
---------PC7 MCLK输出引脚---------------
---------------------------------------*/
//I2S_3  PB12-WS  PB13-CK  PB15-SD PC6-MCLK  
void WM8711_GPIO_Init(void)
{
	
	  GPIO_InitTypeDef GPIO_InitStructure;
  	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
  	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
	  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
  	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 |GPIO_Pin_14  | GPIO_Pin_15;//WS CK SD
  	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  	GPIO_InitStructure.GPIO_PuPd =  GPIO_PuPd_NOPULL;
  	GPIO_Init(GPIOB, &GPIO_InitStructure);
  	GPIO_PinAFConfig(GPIOB, GPIO_PinSource12, GPIO_AF_SPI2);  
  	GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2);
  	GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2);
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_I2S2ext);
	
  	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //MCLK
  	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  	GPIO_InitStructure.GPIO_PuPd =  GPIO_PuPd_NOPULL;
  	GPIO_Init(GPIOC, &GPIO_InitStructure);   
  	GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_SPI2); 
		
		
//------------------wm8711 I2C GPIO Init
//    pcm1770  cs- pc8 md- pa8 mc- pc9
		GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;//md
		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; 
	  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  	GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
		GPIO_Init(GPIOB, &GPIO_InitStructure);
		
// 		GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;//mc
// 		GPIO_Init(GPIOA, &GPIO_InitStructure);
		IIC_SDA=1;	  	  
	  IIC_SCL=1;
}


//            I2S3 初始化 
void I2S3_Init(void)
{	  
  	I2S_InitTypeDef I2S_InitStructure;
 	  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
  	SPI_I2S_DeInit(SPI2);
	
	  I2S_StructInit(&I2S_InitStructure);
  	I2S_InitStructure.I2S_AudioFreq = I2S_AudioFreq_8k;;
  	I2S_InitStructure.I2S_Standard = I2S_Standard_Phillips;
  	I2S_InitStructure.I2S_DataFormat = I2S_DataFormat_16b;
  	I2S_InitStructure.I2S_CPOL = I2S_CPOL_Low;
  	I2S_InitStructure.I2S_Mode = I2S_Mode_MasterTx;
  	I2S_InitStructure.I2S_MCLKOutput = I2S_MCLKOutput_Enable; 
  	I2S_Init(SPI2, &I2S_InitStructure);

	  I2S_FullDuplexConfig(I2S2ext, &I2S_InitStructure);
		I2S_Cmd(SPI2, ENABLE);
	
	  I2S_Cmd(I2S2ext, ENABLE);
}

void I2S3_NVIC(void)
{
    NVIC_InitTypeDef   NVIC_InitStructure;
		NVIC_InitStructure.NVIC_IRQChannel = SPI2_IRQn;
		NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
		NVIC_InitStructure.NVIC_IRQChannelSubPriority =4;
		NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
		NVIC_Init(&NVIC_InitStructure);
		SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_TXE, DISABLE);
}

//    WM8711初始化 
void WM8711_Init(void)  
{
		WM8711_GPIO_Init(); 
		WM8711_Config();
	  I2S3_Init(); 
   	printf("WM1870初始化   \r\n\n");
}

void SDA_OUT(void)
{
	  GPIO_InitTypeDef GPIO_InitStructure;	
		GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; 
	  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  	GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  	GPIO_InitStructure.GPIO_PuPd =  GPIO_PuPd_NOPULL;
		GPIO_Init(GPIOB, &GPIO_InitStructure);
}

void SDA_IN(void)
{
	  GPIO_InitTypeDef GPIO_InitStructure;	
		GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; 
	  GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  	GPIO_InitStructure.GPIO_PuPd =  GPIO_PuPd_NOPULL;
		GPIO_Init(GPIOB, &GPIO_InitStructure);
}


void I2S_Start(void)
{
	SPI_I2S_ITConfig(SPI3, SPI_I2S_IT_RXNE, DISABLE);
	SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_TXE, DISABLE);
	I2S_Cmd(SPI2, ENABLE);
	I2S_Cmd(SPI3, ENABLE);
	printf("REAL_VOICE START   \r\n\n");
}

void delayus(u8 nus)
{
		u32 i,j;
		for(i=0;i<nus;i++)
		 for(j=0;j<50;j++);
}

//产生IIC起始信号
void IIC_Start(void)
{
	SDA_OUT();     //sda线输出
	IIC_SDA=1;	  	  
	IIC_SCL=1;
	delayus(2);  //min 1.3us
 	IIC_SDA=0;    //START:when CLK is high,DATA change form high to low 
	delayus(1);  //min 600ns
	IIC_SCL=0;    //钳住I2C总线，准备发送或接收数据
  delayus(2);  //min 1.3us	
}	

//产生IIC停止信号
void IIC_Stop(void)
{
	SDA_OUT();//sda线输出
	IIC_SCL=0;
	IIC_SDA=0;//STOP:when CLK is high DATA change form low to high
 	delayus(2);//min 1.3us 
	IIC_SCL=1;
  delayus(1);//min 600ns	
	IIC_SDA=1;//发送I2C总线结束信号
	delayus(2);//min 1.3us							   	
}

//等待应答信号到来
//返回值：1，接收应答失败
//        0，接收应答成功
u8 IIC_Wait_Ack(void)
{
	u16 ucErrTime=0;	
	IIC_SDA=1;	   
	IIC_SCL=1;
	delayus(1);//min 600ns	 
	SDA_IN();   //SDA设置为输入 
	while(READ_SDA)
	{
		ucErrTime++;
		if(ucErrTime>450)
		{
			IIC_Stop();
			return 1;
		}
	}
	IIC_SCL=0;//时钟输出0 	   
	return 0;  
} 			 				     
//IIC发送一个字节
//返回从机有无应答
//1，有应答
//0，无应答			  
void IIC_Send_Byte(u8 txd)
{                        
    u8 t;   
	  IIC_SDA=0;
		IIC_SCL=0;//拉低时钟开始数据传输
	  SDA_OUT(); 	               
    for(t=0;t<8;t++)
    {    
		if(txd&0x80)
			IIC_SDA=1;
		else
			IIC_SDA=0;
		txd<<=1; 
		IIC_SCL=1;
		delayus(1);   // min 600ns
		IIC_SCL=0;
    }	 
} 	    
void WM8711_Control(u8 reg,u8 Wdata)
{ 
   IIC_Start();           //起始信号
   IIC_Send_Byte(WM8711_Address&WM8711_Write); //WM8711地址 + 写入 
   IIC_Wait_Ack();
   IIC_Send_Byte(reg);    //寄存器地址
   IIC_Wait_Ack(); 
	
	 IIC_Send_Byte(Wdata);  //寄存器值 
   IIC_Wait_Ack(); 
	 IIC_Stop();
}
void codec_send(u16 Wdata)
{ 
   IIC_Start();           //起始信号
   IIC_Send_Byte(0x34); //WM8711地址 + 写入 
   IIC_Wait_Ack();
   IIC_Send_Byte((Wdata>>8)&0xFF);    //寄存器地址
   IIC_Wait_Ack(); 
	 IIC_Send_Byte(Wdata&0xFF);  //寄存器值 
   IIC_Wait_Ack(); 
	 IIC_Stop();
}
extern uint16_t const VirtAddVarTab[];
void WM8711_Config(void)
{
	 
	 FLASH_Unlock();															//获取标志信息
	 EE_Init();
	 Vol=0xDA;
	 WM8711_Control(0x1E,0x00); //reset
	 WM8711_Control(0x1E,0x00); //reset
   WM8711_Control(0x04,0x80|Vol); //Left Channel Zero Cross detect enable  volume:1111001
   WM8711_Control(0x06,0x80|Vol); //Right Channel Zero Cross detect enable volume:1111001
   WM8711_Control(0x08,0x18); //R4 DAC SEL BYPASS Enable
   WM8711_Control(0x0A,0x01); //DAC MUTE Disable
   WM8711_Control(0x0C,0x07); //R6  power  OFF: 0x87  ON :0x07
   WM8711_Control(0x0E,0x22); //MODE : Master Slaver
   WM8711_Control(0x10,0x04); // Normal mode 8K
   WM8711_Control(0x12,0x01);	// Activate Interface 
}
void TUNING(void)
{
	 WM8711_Control(0x05,0x80|Vol); 
   WM8711_Control(0x07,0x80|Vol);
}

void vol(uint16_t v) // 0~99
{
    v = 63*v/100;
    v = (v & VOL_MASK) << VOL_POS;
    codec_send(REG_LOUT1_VOL | v);
    codec_send(REG_ROUT1_VOL | HPVU | v);
    codec_send(REG_LOUT2_VOL | v);
    codec_send(REG_ROUT2_VOL | SPKVU | v);
}
static uint16_t r06 = REG_CLOCK_GEN | CLKSEL_MCLK | MCLK_DIV1 | BCLK_DIV16;

void sample_rate(int sr)
{
    uint16_t r07 = REG_ADDITIONAL;

    switch (sr)
    {
    case 8000:
			  r06 = REG_CLOCK_GEN | CLKSEL_MCLK | MCLK_DIV1 | BCLK_DIV16 ;
//         r06 = REG_CLOCK_GEN | CLKSEL_MCLK | MCLK_DIV6 | BCLK_DIV8 | (r06 & MS);
        r07 |= SR_8KHZ;
        break;

    case 11025:
        r06 = REG_CLOCK_GEN | CLKSEL_PLL | MCLK_DIV8 | BCLK_DIV8 | (r06 & MS);
        r07 |= SR_12KHZ;
        break;

#i