stm32中怎么通过dma驱动PCM1807的代码

要使用DMA驱动PCM1807，需要先配置好STM32的DMA和I2S模块。下面是一个简单的代码示例，可以参考一下：

#include "stm32f4xx.h"

#define I2S_GPIO_AF         GPIO_AF5_SPI3
#define I2S_WS_PIN          GPIO_Pin_4
#define I2S_SCK_PIN         GPIO_Pin_5
#define I2S_SD_PIN          GPIO_Pin_7

// PCM1807的I2C地址
#define PCM1807_ADDR        0x4C

void i2s_init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    I2S_InitTypeDef I2S_InitStructure;

    // 使能GPIO和SPI时钟
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);

    // 配置GPIO
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource4, I2S_GPIO_AF);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource5, I2S_GPIO_AF);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, I2S_GPIO_AF);

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

    GPIO_InitStructure.GPIO_Pin = I2S_WS_PIN | I2S_SCK_PIN | I2S_SD_PIN;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    // 配置I2S
    I2S_InitStructure.I2S_AudioFreq = I2S_AudioFreq_48k;
    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_Disable;

    I2S_Init(SPI3, &I2S_InitStructure);

    // 使能I2S
    I2S_Cmd(SPI3, ENABLE);
}

void dma_init(void)
{
    DMA_InitTypeDef DMA_InitStructure;

    // 使能DMA时钟
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);

    // 配置DMA
    DMA_InitStructure.DMA_Channel = DMA_Channel_0;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&SPI3->DR;
    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)data_buffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
    DMA_InitStructure.DMA_BufferSize = data_size / 2;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

    DMA_Init(DMA1_Stream4, &DMA_InitStructure);

    // 使能DMA传输完成中断
    DMA_ITConfig(DMA1_Stream4, DMA_IT_TC, ENABLE);

    // 使能DMA
    DMA_Cmd(DMA1_Stream4, ENABLE);
}

void i2c_init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    I2C_InitTypeDef I2C_InitStructure;

    // 使能GPIO和I2C时钟
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);

    // 配置GPIO
    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_UP;

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_9;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

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

    // 配置I2C
    I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;
    I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;
    I2C_InitStruct.I2C_OwnAddress1 = 0x33;
    I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
    I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_InitStruct.I2C_ClockSpeed = 100000;

    I2C_Init(I2C1, &I2C_InitStructure);

    // 使能I2C
    I2C_Cmd(I2C1, ENABLE);
}

void i2c_write(uint8_t addr, uint8_t reg, uint8_t val)
{
    // 发送START信号
    I2C_GenerateSTART(I2C1, ENABLE);

    // 等待START信号发送完成
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

    // 发送设备地址和写命令
    I2C_Send7bitAddress(I2C1, addr, I2C_Direction_Transmitter);

    // 等待地址发送完成
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

    // 发送寄存器地址
    I2C_SendData(I2C1, reg);

    // 等待数据发送完成
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

    // 发送数据
    I2C_SendData(I2C1, val);

    // 等待数据发送完成
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

    // 发送STOP信号
    I2C_GenerateSTOP(I2C1, ENABLE);
}

int main(void)
{
    // 初始化I2S、DMA和I2C
    i2s_init();
    dma_init();
    i2c_init();

    // 配置PCM1807
    i2c_write(PCM1807_ADDR, 0x00, 0x80); // 配置I2S接口
    i2c_write(PCM1807_ADDR, 0x01, 0x01); // 配置音频格式为16位
    i2c_write(PCM1807_ADDR, 0x02, 0x00); // 禁用高通滤波器

    // 启动DMA传输
    DMA_Cmd(DMA1_Stream4, ENABLE);

    while (1)
    {
        // 等待DMA传输完成中断
        if (DMA_GetITStatus(DMA1_Stream4, DMA_IT_TCIF4))
        {
            DMA_ClearITPendingBit(DMA1_Stream4, DMA_IT_TCIF4);

            // 处理接收到的数据
            // ...
        }
    }
}

在上面的代码中，我们通过I2C来配置PCM1807的I2S接口、音频格式和高通滤波器。然后启动DMA传输，将PCM1807的输出数据通过DMA传输到STM32的内存中。最后，在主循环中等待DMA传输完成中断，并处理接收到的数据。请注意，上面的代码只是一个简单的示例，具体实现需要根据实际情况进行修改。