写一个基于STM32F103ZE的霍尔测速传感器测转速库函数代码

以下是一个基于STM32F103ZE的霍尔测速传感器测转速的库函数代码，供参考：

#include "stm32f10x.h"

#define HALL_SENSOR_PIN GPIO_Pin_0
#define HALL_SENSOR_PORT GPIOA
#define HALL_SENSOR_EXTI_LINE EXTI_Line0
#define HALL_SENSOR_NVIC_IRQ EXTI0_IRQn

volatile uint32_t hall_sensor_count = 0;

void hall_sensor_init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    EXTI_InitTypeDef EXTI_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;
    
    // 配置GPIO口
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    GPIO_InitStructure.GPIO_Pin = HALL_SENSOR_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(HALL_SENSOR_PORT, &GPIO_InitStructure);
    
    // 配置外部中断线
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
    EXTI_InitStructure.EXTI_Line = HALL_SENSOR_EXTI_LINE;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);
    
    // 配置NVIC中断
    NVIC_InitStructure.NVIC_IRQChannel = HALL_SENSOR_NVIC_IRQ;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}

void EXTI0_IRQHandler(void)
{
    if (EXTI_GetITStatus(HALL_SENSOR_EXTI_LINE) != RESET)
    {
        hall_sensor_count++;
        EXTI_ClearITPendingBit(HALL_SENSOR_EXTI_LINE);
    }
}

uint32_t hall_sensor_get_rpm(void)
{
    uint32_t rpm = 0;
    rpm = hall_sensor_count * 30;
    hall_sensor_count = 0;
    return rpm;
}

使用方法：

1. 在代码中调用 `hall_sensor_init()` 函数初始化霍尔传感器。
2. 调用 `hall_sensor_get_rpm()` 函数获取转速，单位为 RPM (Revolutions per Minute)。