写一个有输入有输出的gpio

好的，以下是一个基本的有输入有输出的GPIO的示例代码，使用STM32的HAL库：

#include "main.h"
#include "stm32f4xx_hal.h"

/* GPIO Port and Pin Definitions */
#define GPIO_PORT   GPIOA
#define GPIO_PIN    GPIO_PIN_0

/* Function Prototypes */
void SystemClock_Config(void);
static void MX_GPIO_Init(void);

int main(void)
{
  /* MCU Configuration */
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();

  /* Main Loop */
  while (1)
  {
    /* Read the input state */
    uint8_t input_state = HAL_GPIO_ReadPin(GPIO_PORT, GPIO_PIN);

    /* Toggle the output */
    HAL_GPIO_TogglePin(GPIO_PORT, GPIO_PIN);

    /* Delay for a short time */
    HAL_Delay(100);
  }
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 8;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 7;
  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_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /* Configure GPIO pin as input */
  GPIO_InitStruct.Pin = GPIO_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIO_PORT, &GPIO_InitStruct);

  /* Configure GPIO pin as output */
  GPIO_InitStruct.Pin = GPIO_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIO_PORT, &GPIO_InitStruct);
}

该程序将GPIOA.0（PA0）配置为输入，并且将其配置为输出。当程序运行时，它将读取输入状态并将输出翻转，然后延迟100毫秒。