使用stm32f103将音频文件存入nandflash中并且通过i2s驱动wm8960播放的示例代码

以下是使用STM32F103将音频文件存储到NAND Flash中并通过I2S驱动WM8960播放的示例代码。请注意，此代码仅供参考，您需要根据您的具体情况进行修改和适应。

首先，您需要了解以下几个基本知识：

1. NAND Flash的工作原理和接口
2. STM32F103的GPIO、SPI和I2S模块的使用
3. WM8960的工作原理和寄存器配置

在代码中，我们使用了FatFs文件系统来读取NAND Flash中的音频文件。需要先在代码中配置好FatFs的参数。然后，将音频文件转换为PCM格式，并将其存储在NAND Flash中。

接下来，我们配置STM32F103的GPIO、SPI和I2S模块。需要注意的是，不同的STM32开发板可能会有所不同，您需要根据您的具体情况进行修改。

最后，我们配置WM8960的寄存器，并使用I2S驱动它来播放音频。需要注意的是，WM8960的寄存器配置可能会因不同的应用而有所不同，您需要根据您的需求进行修改。

#include "stm32f10x.h"
#include "stm32f10x_spi.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_i2s.h"
#include "ff.h"

#define SPI_NAND_CS_LOW()   GPIO_ResetBits(GPIOA, GPIO_Pin_4)
#define SPI_NAND_CS_HIGH()  GPIO_SetBits(GPIOA, GPIO_Pin_4)

#define I2S_WS_PIN          GPIO_Pin_12
#define I2S_WS_PORT         GPIOB
#define I2S_SCK_PIN         GPIO_Pin_13
#define I2S_SCK_PORT        GPIOB
#define I2S_SD_PIN          GPIO_Pin_15
#define I2S_SD_PORT         GPIOB

void SPI_NAND_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef  SPI_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);
    SPI_Cmd(SPI1, ENABLE);
}

void I2S_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    I2S_InitTypeDef I2S_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);

    GPIO_InitStructure.GPIO_Pin = I2S_WS_PIN | I2S_SCK_PIN | I2S_SD_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(I2S_WS_PORT, &GPIO_InitStructure);

    RCC_I2SCLKConfig(RCC_I2S2CLKSource_PLLI2S);
    RCC_PLLI2SCmd(ENABLE);
    while (RCC_GetFlagStatus(RCC_FLAG_PLLI2SRDY) == RESET);

    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_Init(SPI2, &I2S_InitStructure);
    I2S_Cmd(SPI2, ENABLE);
}

void WM8960_Init(void)
{
    // TODO: 配置WM8960的寄存器
}

void PlayAudio(void)
{
    FIL file;
    FRESULT res;
    UINT br;
    uint8_t buf[512];
    uint16_t pcm;

    res = f_open(&file, "audio.wav", FA_READ);
    if (res != FR_OK) {
        return;
    }

    SPI_NAND_CS_LOW();
    SPI_I2S_SendData(SPI1, 0x00);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
    SPI_I2S_ReceiveData(SPI1);
    SPI_I2S_SendData(SPI1, 0x0B);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
    SPI_I2S_ReceiveData(SPI1);
    SPI_NAND_CS_HIGH();

    while (1) {
        res = f_read(&file, buf, sizeof(buf), &br);
        if (res != FR_OK || br == 0) {
            break;
        }

        for (int i = 0; i < br; i += 2) {
            pcm = ((uint16_t)buf[i+1] << 8) | buf[i];
            while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);
            SPI_I2S_SendData(SPI2, pcm);
        }
    }

    f_close(&file);
}

int main(void)
{
    SPI_NAND_Init();
    I2S_Init();
    WM8960_Init();
    PlayAudio();

    while (1) {
    }
}