SPI_I2S_INT_FLAG_TC

SPI_I2S_INT_FLAG_TC是一个SPI/I2S传输完成的中断标志位，当SPI/I2S传输完成时，该标志位将会被置位。这个标志位可以用来判断数据是否已经全部发送或接收完成。

在使用STM32的SPI/I2S外设时，我们可以通过开启相关的中断来实现异步传输，并且在传输完成后通过检查SPI_I2S_INT_FLAG_TC标志位的状态来执行相应的操作。

如果SPI/I2S传输的数据较大，我们可以使用DMA方式进行数据传输，这时候中断仅用于标志传输是否完成。当使用DMA方式进行SPI/I2S传输时，我们可以通过检查SPI_I2S_FLAG_TXE和SPI_I2S_FLAG_RXNE标志位的状态来判断数据是否已经全部发送或接收完成。

相关问题

STM32 用I2S和DMA控制CS4344播放WAVE音频详细程序

以下是一个使用STM32的I2S和DMA控制CS4344播放WAVE音频的详细程序：

#include "stm32f4xx.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_spi.h"
#include "stm32f4xx_dma.h"
#include "wave.h"

#define AUDIO_BUFFER_SIZE 2048

static uint16_t audio_buffer[AUDIO_BUFFER_SIZE];
static uint32_t audio_buffer_index = 0;
static uint32_t audio_buffer_size = 0;

void RCC_Configuration(void)
{
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);
}

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_12 | GPIO_Pin_15;
    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_InitStructure.GPIO_Pin = GPIO_Pin_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SPI3);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SPI3);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource15, GPIO_AF_SPI3);
}

void SPI_Configuration(void)
{
    SPI_InitTypeDef SPI_InitStructure;

    SPI_I2S_DeInit(SPI3);

    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
    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(SPI3, &SPI_InitStructure);

    SPI_Cmd(SPI3, ENABLE);
}

void DMA_Configuration(void)
{
    DMA_InitTypeDef DMA_InitStructure;

    DMA_DeInit(DMA1_Stream7);

    DMA_InitStructure.DMA_Channel = DMA_Channel_0;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&SPI3->DR;
    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)audio_buffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
    DMA_InitStructure.DMA_BufferSize = AUDIO_BUFFER_SIZE;
    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_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
    DMA_Init(DMA1_Stream7, &DMA_InitStructure);

    DMA_ITConfig(DMA1_Stream7, DMA_IT_TC, ENABLE);
    NVIC_EnableIRQ(DMA1_Stream7_IRQn);
}

void DMA1_Stream7_IRQHandler(void)
{
    if (DMA_GetITStatus(DMA1_Stream7, DMA_IT_TCIF7) != RESET) {
        DMA_ClearITPendingBit(DMA1_Stream7, DMA_IT_TCIF7);
        audio_buffer_index += AUDIO_BUFFER_SIZE;
        audio_buffer_size -= AUDIO_BUFFER_SIZE;
        if (audio_buffer_size < AUDIO_BUFFER_SIZE) {
            DMA_Cmd(DMA1_Stream7, DISABLE);
            SPI_I2S_DMACmd(SPI3, SPI_I2S_DMAReq_Tx, DISABLE);
        }
    }
}

void CS4344_Init(void)
{
    GPIO_SetBits(GPIOA, GPIO_Pin_4);
    uint16_t reg = 0x0000; // DAC control register
    reg |= 0x0001; // Soft reset
    reg |= 0x0002; // Power up
    reg |= 0x0020; // I2S mode
    reg |= 0x0080; // Master mode
    reg |= 0x0100; // 24-bit data
    reg |= 0x0200; // BCLK is input to DAC
    reg |= 0x0800; // MCLK is input to DAC
    reg |= 0x1000; // Left channel DAC data is left-justified
    reg |= 0x2000; // Right channel DAC data is right-justified
    reg |= 0x4000; // Soft mute disable
    CS4344_WriteReg(reg);
}

void CS4344_WriteReg(uint16_t reg)
{
    GPIO_ResetBits(GPIOA, GPIO_Pin_4);
    SPI_I2S_SendData(SPI3, (reg >> 8) & 0xFF);
    while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) == SET);
    SPI_I2S_SendData(SPI3, reg & 0xFF);
    while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) == SET);
    GPIO_SetBits(GPIOA, GPIO_Pin_4);
}

void Wave_Reader(uint8_t *data, uint32_t offset, uint32_t size)
{
    uint32_t i;
    for (i = 0; i < size; i += 2) {
        audio_buffer[i / 2] = (uint16_t)data[offset + i + 1] << 8 | (uint16_t)data[offset + i];
    }
}

int main(void)
{
    RCC_Configuration();
    GPIO_Configuration();
    SPI_Configuration();
    DMA_Configuration();
    CS4344_Init();

    uint8_t *wav_data;
    uint32_t wav_size;
    uint32_t wav_freq;
    uint32_t wav_samples;
    if (Wave_ReadFile("test.wav", &wav_data, &wav_size, &wav_freq, &wav_samples) != 0) {
        // Error reading wave file
        while (1);
    }

    audio_buffer_size = AUDIO_BUFFER_SIZE;
    Wave_Reader(wav_data, 44, AUDIO_BUFFER_SIZE * sizeof(uint16_t));
    audio_buffer_index = AUDIO_BUFFER_SIZE;

    DMA_Cmd(DMA1_Stream7, ENABLE);
    SPI_I2S_DMACmd(SPI3, SPI_I2S_DMAReq_Tx, ENABLE);

    while (audio_buffer_size > 0) {
        // Wait for DMA to finish
    }

    free(wav_data);

    while (1);
}

该程序使用DMA和I2S接口将WAVE格式的音频数据发送到CS4344芯片，实现音频播放功能。其中，Wave_Reader函数用于从WAVE文件中读取音频数据并将其转换为16位PCM格式。CS4344_Init函数用于初始化CS4344芯片的各种寄存器设置。DMA1_Stream7_IRQHandler函数用于处理DMA传输完成中断。在main函数中，程序首先读取WAVE文件中的音频数据，然后将其发送到CS4344芯片。在DMA传输完成后，程序通过轮询等待音频数据的发送完成，直到音频数据全部发送完毕。

使用stm32f103r6通过74hc595控制一位led数码管从0到9循环显示并且使用spi方式通讯 写出tc77的keil代码

以下是使用stm32f103r6通过74hc595控制一位led数码管从0到9循环显示并且使用spi方式通讯的代码：

#include "stm32f10x.h"
#include "delay.h"

// 74HC595寄存器控制字
#define LED_0 0x3F // 数码管显示0
#define LED_1 0x06 // 数码管显示1
#define LED_2 0x5B // 数码管显示2
#define LED_3 0x4F // 数码管显示3
#define LED_4 0x66 // 数码管显示4
#define LED_5 0x6D // 数码管显示5
#define LED_6 0x7D // 数码管显示6
#define LED_7 0x07 // 数码管显示7
#define LED_8 0x7F // 数码管显示8
#define LED_9 0x6F // 数码管显示9

void SPI1_Init(void);
void SPI1_SendData(uint8_t data);
void LED_Display(uint8_t num);

int main(void)
{
    uint8_t led_num = 0; // 数码管显示的数字

    SPI1_Init(); // 初始化SPI1
    while(1)
    {
        LED_Display(led_num); // 显示数码管数字
        led_num++; // 数码管数字加1
        if(led_num == 10) led_num = 0; // 数码管数字循环显示0~9
        Delay_ms(500); // 延时500ms
    }
}

void SPI1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef SPI_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE); // 使能GPIOA和SPI1时钟

    // 配置SPI1 SCK、MISO、MOSI引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置74HC595的CS引脚
    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);

    // SPI1配置
    SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
    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_256;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_Init(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE); // 使能SPI1
    GPIO_SetBits(GPIOA, GPIO_Pin_4); // 74HC595的CS引脚置高
}

void SPI1_SendData(uint8_t data)
{
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET); // 等待发送缓冲区空
    SPI_I2S_SendData(SPI1, data); // 发送数据
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); // 等待发送结束
}

void LED_Display(uint8_t num)
{
    uint8_t i;
    GPIO_ResetBits(GPIOA, GPIO_Pin_4); // 74HC595的CS引脚置低，开始传输数据

    for(i=0; i<8; i++)
    {
        if(num & (1<<i))
            SPI1_SendData(LED_0);
        else
            SPI1_SendData(0x00);
    }

    GPIO_SetBits(GPIOA, GPIO_Pin_4); // 74HC595的CS引脚置高，传输结束
}

以下是使用stm32f103r6通过SPI通讯方式读取TC77温度传感器的Keil代码：

#include "stm32f10x.h"
#include "delay.h"

#define SPI_CS_PIN GPIO_Pin_4
#define SPI_CS_GPIO_PORT GPIOA

void SPI1_Init(void);
void SPI1_SendData(uint8_t data);
uint16_t SPI1_ReceiveData(void);
float TC77_ReadTemperature(void);

int main(void)
{
    float temperature;

    SPI1_Init(); // 初始化SPI1
    while(1)
    {
        temperature = TC77_ReadTemperature(); // 读取温度
        Delay_ms(1000); // 延时1s
    }
}

void SPI1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef SPI_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE); // 使能GPIOA和SPI1时钟

    // 配置SPI1 SCK、MISO、MOSI引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置TC77的CS引脚
    GPIO_InitStructure.GPIO_Pin = SPI_CS_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(SPI_CS_GPIO_PORT, &GPIO_InitStructure);

    // SPI1配置
    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
    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_256;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_Init(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE); // 使能SPI1
    GPIO_SetBits(SPI_CS_GPIO_PORT, SPI_CS_PIN); // TC77的CS引脚置高
}

void SPI1_SendData(uint8_t data)
{
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET); // 等待发送缓冲区空
    SPI_I2S_SendData(SPI1, data); // 发送数据
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); // 等待发送结束
}

uint16_t SPI1_ReceiveData(void)
{
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET); // 等待发送缓冲区空
    SPI_I2S_SendData(SPI1, 0x00); // 发送数据，读取返回值
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET); // 等待接收缓冲区非空
    return SPI_I2S_ReceiveData(SPI1); // 读取接收缓冲区数据
}

float TC77_ReadTemperature(void)
{
    uint16_t temperature_data;
    float temperature;

    GPIO_ResetBits(SPI_CS_GPIO_PORT, SPI_CS_PIN); // TC77的CS引脚置低，开始传输数据

    SPI1_SendData(0x80); // 发送读温度寄存器命令
    temperature_data = SPI1_ReceiveData(); // 读取温度寄存器数据
    temperature_data = temperature_data >> 3; // 将温度数据调整为16位

    GPIO_SetBits(SPI_CS_GPIO_PORT, SPI_CS_PIN); // TC77的CS引脚置高，传输结束

    temperature = temperature_data * 0.0625; // 计算温度值
    return temperature; // 返回温度值
}