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