stm32.cube（三）——HAL.GPIO

最新推荐文章于 2025-10-19 18:46:10 发布

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最新推荐文章于 2025-10-19 18:46:10 发布 · 1.2w 阅读

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CC 4.0 BY-SA版权

文章标签：

#操作 #operation #int #hal #gpio

本文详细介绍了STM32 HAL库中GPIO的初始化和操作，包括GPIO初始化结构体、模式设置、拉高拉低及速度选择。强调了初始化的重要性以及GPIO操作的基本函数，适合初学者参考。

一、总览

HAL层里的库函数和大家熟悉的stm32lib基本上是一致的。一般来说一个cpu外设的操作函数分成两部分，分别是init和operation。

来看一个cube里的例子：

static GPIO_InitTypeDef  GPIO_InitStruct;

int main(void)
{
  /* This sample code shows how to use GPIO HAL API to toggle LED2 IO
    in an infinite loop. */

  /* STM32F103xB HAL library initialization:
       - Configure the Flash prefetch
       - Systick timer is configured by default as source of time base, but user 
         can eventually implement his proper time base source (a general purpose 
         timer for example or other time source), keeping in mind that Time base 
         duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and 
         handled in milliseconds basis.
       - Set NVIC Group Priority to 4
       - Low Level Initialization
     */
  HAL_Init();

  /* Configure the system clock to 64 MHz */
  SystemClock_Config();

  /* -1- Enable GPIO Clock (to be able to program the configuration registers) */
  LED2_GPIO_CLK_ENABLE();

  /* -2- Configure IO in output push-pull mode to drive external LEDs */
  GPIO_InitStruct.Mode  = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull  = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;

  GPIO_InitStruct.Pin = LED2_PIN;
  HAL_GPIO_Init(LED2_GPIO_PORT, &GPIO_InitStruct);

  /* -3- Toggle IO in an infinite loop */
  while (1)
  {
    HAL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);
    /* Insert delay 100 ms */
    HAL_Delay(100);
  }
}