void Gpio_IRQHandler(uint8_t u8Param) { *((uint32_t *)((uint32_t)&M0P_GPIO->P3ICLR + u8Param * 0x40)) = 0; SK_LED_SET(0); delay1ms(100); SK_LED_SET(1); delay1ms(100); } int32_t main(void) { SK_SW2_INIT(); SK_LED_INIT(); Gpio_InitIO(TEST_PORT, TEST_PIN, GpioDirOut); Gpio_SetIO(TEST_PORT, TEST_PIN, TRUE); Gpio_InitIOExt(3, 3, GpioDirIn, TRUE, FALSE, FALSE, 0); Gpio_ClearIrq(3, 3); Gpio_EnableIrq(3, 3, GpioIrqRising); EnableNvic(PORT3_IRQn, DDL_IRQ_LEVEL_DEFAULT, TRUE); while (1) { Gpio_SetIO(TEST_PORT, TEST_PIN, TRUE); delay1ms(1000); Gpio_SetIO(TEST_PORT, TEST_PIN, FALSE); delay1ms(1000); } }翻译这些代码意思

这段代码是一个使用GPIO的示例程序。其中，`Gpio_IRQHandler` 是一个GPIO中断服务函数，当GPIO发生中断时执行。`main`函数中初始化了一些GPIO和中断相关的设置，然后进入一个循环中，每隔1秒交替地将一个GPIO引脚设置为高电平和低电平。在GPIO引脚发生中断时，会执行`Gpio_IRQHandler`函数，该函数会将中断标志位清零，并交替地将一个LED引脚设置为高电平和低电平，以示中断已经发生。

相关问题

#include "gpio.h" #define TEST_PORT (0) #define TEST_PIN (3) #define SK_SW2_INIT() Gpio_InitIO(3, 3, GpioDirIn) #define SK_SW2_GET() Gpio_GetIO(3,3) #define SK_LED_INIT() Gpio_InitIO(0, 3, GpioDirOut) #define SK_LED_SET(x) Gpio_SetIO(0,3,(x)) uint8_t num = 1; void Gpio_IRQHandler(uint8_t u8Param) { *((uint32_t *)((uint32_t)&M0P_GPIO->P3ICLR + u8Param * 0x40)) = 0; SK_LED_SET(0); delay1ms(100); SK_LED_SET(1); delay1ms(100); } int32_t main(void) { SK_SW2_INIT(); SK_LED_INIT(); Gpio_InitIO(TEST_PORT, TEST_PIN, GpioDirOut); Gpio_SetIO(TEST_PORT, TEST_PIN, TRUE); Gpio_InitIOExt(3, 3, GpioDirIn, TRUE, FALSE, FALSE, 0); Gpio_ClearIrq(3, 3); Gpio_EnableIrq(3, 3, GpioIrqRising); EnableNvic(PORT3_IRQn, DDL_IRQ_LEVEL_DEFAULT, TRUE); while (1) { Gpio_SetIO(TEST_PORT, TEST_PIN, TRUE); delay1ms(1000); Gpio_SetIO(TEST_PORT, TEST_PIN, FALSE); delay1ms(1000); } }把这个代码改成p33按键可以控制中断的退出和进入

好的，我帮您修改了代码，如下所示：

#include "gpio.h"  

#define TEST_PORT       (0) 
#define TEST_PIN        (3)  
#define SK_SW2_INIT()       Gpio_InitIO(3, 3, GpioDirIn) 
#define SK_SW2_GET()        Gpio_GetIO(3,3)  
#define SK_LED_INIT()       Gpio_InitIO(0, 3, GpioDirOut) 
#define SK_LED_SET(x)       Gpio_SetIO(0,3,(x))  

uint8_t num = 1;  
uint8_t flag = 1;
  
void Gpio_IRQHandler(uint8_t u8Param) {     
    *((uint32_t *)((uint32_t)&M0P_GPIO->P3ICLR + u8Param * 0x40)) = 0; 	 	 

    if (flag == 1) {  // 检测到按键中断
        flag = 0;
        Gpio_DisableIrq(3, 3, GpioIrqRising);  // 禁用按键中断
    } else {  // 检测到按键松开
        flag = 1;
        Gpio_EnableIrq(3, 3, GpioIrqRising);  // 重新使能按键中断
    }

    SK_LED_SET(0);     
    delay1ms(100);     
    SK_LED_SET(1);     
    delay1ms(100); 
}   

int32_t main(void) { 
    SK_SW2_INIT(); 
    SK_LED_INIT(); 
    Gpio_InitIO(TEST_PORT, TEST_PIN, GpioDirOut); 
    Gpio_SetIO(TEST_PORT, TEST_PIN, TRUE); 
    Gpio_InitIOExt(3, 3, GpioDirIn, TRUE, FALSE, FALSE, 0); 
    Gpio_ClearIrq(3, 3); 
    Gpio_EnableIrq(3, 3, GpioIrqRising); 
    EnableNvic(PORT3_IRQn, DDL_IRQ_LEVEL_DEFAULT, TRUE); 

    while (1) { 
        if (flag == 1) {  // 检测到按键松开
            Gpio_SetIO(TEST_PORT, TEST_PIN, TRUE); 
            delay1ms(1000); 
            Gpio_SetIO(TEST_PORT, TEST_PIN, FALSE); 
            delay1ms(1000); 
        }
    } 
}

这个修改后的代码中，添加了一个flag变量用来标志按键是否被按下，以及在中断处理函数中检测按键状态并相应地禁用或使能按键中断。在主函数中，只有在flag变量为1（即按键松开）的时候才执行LED闪烁的代码。这样，按下按键时，LED将停止闪烁，直到按键再次松开。

HAL_UARTEx_ReceiveToIdle_DMA示例

以下是HAL_UARTEx_ReceiveToIdle_DMA的示例代码：

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f4xx_hal.h"

/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart2;
DMA_HandleTypeDef hdma_usart2_rx;

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_USART2_UART_Init(void);

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_USART2_UART_Init();

  uint8_t buffer[100] = {0};
  uint32_t rx_size;

  while (1)
  {
    // Start UART reception in DMA mode until idle
    HAL_UARTEx_ReceiveToIdle_DMA(&huart2, buffer, sizeof(buffer));

    // Wait until idle
    while (HAL_UARTEx_GetRxIdleness(&huart2) != RESET);

    // Get received data size
    rx_size = sizeof(buffer) - __HAL_DMA_GET_COUNTER(&hdma_usart2_rx);

    // Process received data
    // ...

    // Clear buffer
    memset(buffer, 0, sizeof(buffer));
  }
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief USART2 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART2_UART_Init(void)
{
  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * Enable DMA controller clock
  */
static void MX_DMA_Init(void)
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Stream5_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Stream5_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Stream5_IRQn);
}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* User may add here some code to deal with this error */
  while(1)
  {
  }
}

/**
  * @brief  This function is executed in case of DMA interrupt occurrence.
  * @retval None
  */
void DMA1_Stream5_IRQHandler(void)
{
  HAL_DMA_IRQHandler(&hdma_usart2_rx);
}

/**
  * @brief  This function is executed when DMA reception is completed.
  * @param  huart: UART handle
  * @retval None
  */
void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart)
{
  if (huart->Instance == USART2)
  {
    // DMA reception completed, do something if needed
  }
}

在此示例代码中，我们使用STM32Cube HAL库实现了UART的DMA接收，使用了HAL_UARTEx_ReceiveToIdle_DMA函数。在主循环中，我们不断调用该函数以启动DMA接收，然后等待DMA接收完成。一旦接收完成，我们就可以对接收到的数据进行处理。注意，在处理完数据后，我们需要清空接收缓冲区，以便下一次接收。