stm32操作es8311的过程

操作 ES8311 音频编解码芯片需要以下步骤：

1. 配置 I2C 总线，使能 I2C 时钟。
2. 初始化 ES8311 配置寄存器，包括 I2S 接口和音频参数设置。
3. 配置 DMA 传输模式，使数据从内存到 I2S 接口传输。
4. 启动 I2S 和 DMA 传输。

以下是一个简单的 STM32 操作 ES8311 的示例代码：

#include "stm32f4xx.h"
#include "es8311.h"

// 定义 I2C 设备地址和 I2S 接口
#define ES8311_ADDR 0x10
#define I2Sx SPI3

// 初始化 I2C 总线
void i2c_init(void) {
    GPIO_InitTypeDef GPIO_InitStruct;
    I2C_InitTypeDef I2C_InitStruct;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_9;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_OD;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOB, &GPIO_InitStruct);

    GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_I2C1);
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_I2C1);

    I2C_DeInit(I2C1);
    I2C_InitStruct.I2C_ClockSpeed = 100000;
    I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;
    I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;
    I2C_InitStruct.I2C_OwnAddress1 = 0x00;
    I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
    I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_Init(I2C1, &I2C_InitStruct);
    I2C_Cmd(I2C1, ENABLE);
}

// 初始化 ES8311 配置寄存器
void es8311_init(void) {
    uint8_t data[2];

    // 设置 I2S 接口
    data[0] = ES8311_DAC_CTRL1_REG;
    data[1] = ES8311_DAC_EN | ES8311_DAC_MONO_MODE | ES8311_ADC_EN | ES8311_ADC_MONO_MODE;
    es8311_write_reg(data, 2);

    // 配置音频参数
    data[0] = ES8311_DAC_CTRL2_REG;
    data[1] = ES8311_DAC_I2S_DF_LEFT | ES8311_DAC_DATA_WIDTH_16BIT;
    es8311_write_reg(data, 2);

    // 配置音量
    data[0] = ES8311_DAC_VOLUME_CTRL;
    data[1] = ES8311_DAC_VOLUME(0x3f) | ES8311_DAC_VOLUME(0x3f);
    es8311_write_reg(data, 2);
}

// 配置 DMA 传输模式
void dma_init(void) {
    DMA_InitTypeDef DMA_InitStruct;

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);

    DMA_InitStruct.DMA_Channel = DMA_Channel_0;
    DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)&I2Sx->DR;
    DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t)buffer;
    DMA_InitStruct.DMA_DIR = DMA_DIR_MemoryToPeripheral;
    DMA_InitStruct.DMA_BufferSize = BUFFER_SIZE;
    DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStruct.DMA_Priority = DMA_Priority_High;
    DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Disable;
    DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
    DMA_Init(DMA1_Stream7, &DMA_InitStruct);

    SPI_I2S_DMACmd(I2Sx, SPI_I2S_DMAReq_Tx, ENABLE);
    DMA_Cmd(DMA1_Stream7, ENABLE);
}

// 启动 I2S 和 DMA 传输
void i2s_init(void) {
    GPIO_InitTypeDef GPIO_InitStruct;
    I2S_InitTypeDef I2S_InitStruct;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOA, ENABLE);

    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_5;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOC, &GPIO_InitStruct);

    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4;
    GPIO_Init(GPIOA, &GPIO_InitStruct);

    GPIO_PinAFConfig(GPIOC, GPIO_PinSource3, GPIO_AF_SPI3);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource5, GPIO_AF_SPI3);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource4, GPIO_AF_SPI3);

    I2S_InitStruct.I2S_Mode = I2S_Mode_MasterTx;
    I2S_InitStruct.I2S_Standard = I2S_Standard_Phillips;
    I2S_InitStruct.I2S_DataFormat = I2S_DataFormat_16b;
    I2S_InitStruct.I2S_MCLKOutput = I2S_MCLKOutput_Enable;
    I2S_InitStruct.I2S_AudioFreq = I2S_AudioFreq_48k;
    I2S_InitStruct.I2S_CPOL = I2S_CPOL_Low;
    I2S_Init(SPI3, &I2S_InitStruct);
    I2S_Cmd(SPI3, ENABLE);
}

// 写入 ES8311 寄存器
void es8311_write_reg(uint8_t *data, uint32_t len) {
    while (I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
    I2C_GenerateSTART(I2C1, ENABLE);
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
    I2C_Send7bitAddress(I2C1, ES8311_ADDR, I2C_Direction_Transmitter);
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
    while (len--) {
        I2C_SendData(I2C1, *data++);
        while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
    }
    I2C_GenerateSTOP(I2C1, ENABLE);
}

int main(void) {
    i2c_init();
    es8311_init();
    dma_init();
    i2s_init();

    while (1);

    return 0;
}

需要注意的是，以上代码仅供参考，实际操作需要针对具体的硬件平台和应用场景进行调整。