STM32F103R6 实现单个数码管循环显示数字0-9，请给出代码

以下是 STM32F103R6 实现单个数码管循环显示数字0-9 的代码，使用的是定时器TIM5和GPIO库：

#include "stm32f10x.h"

// 数码管对应引脚
#define SEG_A GPIO_Pin_0
#define SEG_B GPIO_Pin_1
#define SEG_C GPIO_Pin_2
#define SEG_D GPIO_Pin_3
#define SEG_E GPIO_Pin_4
#define SEG_F GPIO_Pin_5
#define SEG_G GPIO_Pin_6
#define SEG_DP GPIO_Pin_7

// 数码管显示的数字 0-9
uint8_t digit[10] = {0xFC, 0x60, 0xDA, 0xF2, 0x66, 0xB6, 0xBE, 0xE0, 0xFE, 0xF6};

// 显示的当前数字
uint8_t current_digit = 0;

// 定时器 TIM5 中断处理函数
void TIM5_IRQHandler()
{
    if (TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET)
    {
        // 设置数码管输出
        GPIO_Write(GPIOB, digit[current_digit]);

        // 切换到下一个数字
        current_digit++;
        if (current_digit >= 10)
            current_digit = 0;
        
        TIM_ClearITPendingBit(TIM5, TIM_IT_Update);
    }
}

int main(void)
{
    // 使能时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);

    // 设置引脚为推挽输出
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F | SEG_G | SEG_DP;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    // 初始化定时器 TIM5 为 1ms
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_TimeBaseStructure.TIM_Period = 999;
    TIM_TimeBaseStructure.TIM_Prescaler = 71;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);

    // 使能 TIM5 中断
    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    // 启动定时器
    TIM_Cmd(TIM5, ENABLE);

    while(1)
    {
        // 空循环
    }

    return 0;
}