写一个stm32 hcsr501 显示信息在OLED屏上的main函数

以下是一个简单的示例代码，展示如何在STM32上使用HC-SR501传感器和OLED屏幕显示检测结果：

#include "stm32f10x.h"
#include "OLED.h"

#define HCSR501_PIN GPIO_Pin_0
#define HCSR501_PORT GPIOA
#define HCSR501_CLOCK RCC_APB2Periph_GPIOA
#define HCSR501_EXTI EXTI_Line0
#define HCSR501_EXTI_PORTSOURCE GPIO_PortSourceGPIOA
#define HCSR501_EXTI_PINSOURCE GPIO_PinSource0
#define HCSR501_EXTI_IRQ EXTI0_IRQn

volatile uint8_t motionDetected = 0;

void HCSR501_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    EXTI_InitTypeDef EXTI_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    // Enable clock for GPIOA and EXTI0
    RCC_APB2PeriphClockCmd(HCSR501_CLOCK, ENABLE);

    // Configure pin as input with pull-up
    GPIO_InitStructure.GPIO_Pin = HCSR501_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(HCSR501_PORT, &GPIO_InitStructure);

    // Configure EXTI line
    GPIO_EXTILineConfig(HCSR501_EXTI_PORTSOURCE, HCSR501_EXTI_PINSOURCE);
    EXTI_InitStructure.EXTI_Line = HCSR501_EXTI;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);

    // Configure NVIC
    NVIC_InitStructure.NVIC_IRQChannel = HCSR501_EXTI_IRQ;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}

void HCSR501_IRQHandler(void)
{
    if (EXTI_GetITStatus(HCSR501_EXTI) != RESET)
    {
        motionDetected = 1;
        EXTI_ClearITPendingBit(HCSR501_EXTI);
    }
}

int main(void)
{
    // Initialize OLED screen
    OLED_Init();

    // Initialize HC-SR501 motion sensor
    HCSR501_Init();

    while (1)
    {
        if (motionDetected)
        {
            OLED_Clear();
            OLED_ShowString(0, 0, "Motion detected!");
            motionDetected = 0;
        }
    }
}

注意：该示例代码仅为演示如何使用HC-SR501和OLED显示屏在STM32上进行基本操作，并且没有经过完整测试和优化。实际使用时，请根据具体需求进行修改和优化。