使用keill库函数进行编写完整程序代码示例：STM32 F4实现DMX512协议数据收发程序,

好的，以下是一个完整的程序示例，用于实现STM32F4的DMX512协议数据收发：

#include "stm32f4xx.h"
#include "stm32f4xx_conf.h"

#define DMX_FRAME_SIZE 512

uint8_t dmxFrame[DMX_FRAME_SIZE];
uint16_t dmxTimeout = 0;

void USART_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    /* Enable GPIO clock */
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

    /* Enable USART clock */
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);

    /* Connect USART pins to AF */
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2); // USART2_TX
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2); // USART2_RX

    /* Configure USART Tx and Rx as alternate function push-pull */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
    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_Init(GPIOA, &GPIO_InitStructure);

    /* USART configuration */
    USART_InitStructure.USART_BaudRate = 250000;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_2;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    USART_Init(USART2, &USART_InitStructure);

    /* Enable USART */
    USART_Cmd(USART2, ENABLE);

    /* Configure USART interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    /* Enable USART interrupt */
    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
}

void TIM_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    /* Enable TIM clock */
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);

    /* TIM configuration */
    TIM_InitStructure.TIM_Period = 4000;
    TIM_InitStructure.TIM_Prescaler = 8399;
    TIM_InitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_InitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM6, &TIM_InitStructure);

    /* Configure TIM interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = TIM6_DAC_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    /* Enable TIM interrupt */
    TIM_ITConfig(TIM6, TIM_IT_Update, ENABLE);
}

void USART2_IRQHandler(void)
{
    if (USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
    {
        uint8_t dmxByte = USART_ReceiveData(USART2);

        if (dmxTimeout == 0)
        {
            TIM_Cmd(TIM6, ENABLE);
        }

        if (dmxTimeout < 20)
        {
            dmxFrame[dmxTimeout] = dmxByte;
            dmxTimeout++;
        }
    }
}

void TIM6_DAC_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM6, TIM_IT_Update) != RESET)
    {
        TIM_ClearITPendingBit(TIM6, TIM_IT_Update);

        TIM_Cmd(TIM6, DISABLE);

        if (dmxTimeout > 0)
        {
            if (dmxFrame[0] == 0x00 && dmxTimeout >= DMX_FRAME_SIZE)
            {
                // DMX512 frame received
                // Process dmxFrame here...
            }
        }

        dmxTimeout = 0;
    }
}

int main(void)
{
    USART_Configuration();
    TIM_Configuration();

    while (1)
    {
        // Main program loop
    }
}

这个程序使用Keil库函数初始化了USART2串口和TIM6定时器，并实现了USART2的接收中断和TIM6的定时中断。在USART2的接收中断中，每次接收到1个字节的数据后，如果当前没有定时器在计时，则启动定时器计时。如果在4ms内接收到了足够的512个字节数据，则认为DMX512帧接收完成，可以进行数据处理。在TIM6的定时中断中，如果定时器超时，说明当前帧数据接收完成，需要进行处理。

这个程序只是一个简单的示例，具体的数据处理和发送需要根据实际应用场景进行编写。