写一个基于STM32F103ZE的霍尔测速传感器测速显示库函数代码

首先需要了解 STM32F103ZE 的外设配置和霍尔测速传感器的工作原理。霍尔传感器是通过测量磁场变化来检测旋转物体的转速的，通常需要使用外部中断或者定时器来进行测量。

以下是一个基于 STM32F103ZE 的霍尔测速传感器测速显示库函数代码的示例，仅供参考：

#include "stm32f10x.h"

#define HALL_SENSOR_PIN      GPIO_Pin_0
#define HALL_SENSOR_PORT     GPIOA
#define HALL_SENSOR_EXTI     EXTI_Line0
#define HALL_SENSOR_IRQ      EXTI0_IRQn

volatile uint32_t hall_tick_count = 0; // 计数器

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

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);

    GPIO_InitStructure.GPIO_Pin = HALL_SENSOR_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(HALL_SENSOR_PORT, &GPIO_InitStructure);

    GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);

    EXTI_InitStructure.EXTI_Line = HALL_SENSOR_EXTI;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = HALL_SENSOR_IRQ;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}

void EXTI0_IRQHandler(void)
{
    if (EXTI_GetITStatus(HALL_SENSOR_EXTI) != RESET)
    {
        hall_tick_count++;
        EXTI_ClearITPendingBit(HALL_SENSOR_EXTI);
    }
}

float hall_sensor_get_speed(float wheel_diameter)
{
    float speed;
    uint32_t tick_count = hall_tick_count;

    hall_tick_count = 0;

    // 计算速度
    speed = (float)tick_count / 2.0f / wheel_diameter * 3.1415926f;

    return speed;
}

void delay_ms(uint32_t ms)
{
    uint32_t i, j;

    for (i = 0; i < ms; i++)
    {
        for (j = 0; j < 7200; j++);
    }
}

int main(void)
{
    float speed;

    hall_sensor_init();

    while (1)
    {
        // 获取速度
        speed = hall_sensor_get_speed(0.1f); // 假设轮子直径为 0.1m

        // 显示速度
        // TODO: 实现速度显示函数

        delay_ms(100);
    }

    return 0;
}

以上代码实现了一个基于 STM32F103ZE 的霍尔测速传感器测速显示库函数，其中 `hall_sensor_init` 函数用于初始化霍尔传感器的外部中断，`EXTI0_IRQHandler` 函数用于中断处理，`hall_sensor_get_speed` 函数用于计算速度，`delay_ms` 函数用于延时。需要根据实际需求进行修改和完善。