STM32F103C8T6使用独立按键控制呼吸灯的代码

以下是使用STM32F103C8T6单片机控制呼吸灯的代码，该代码使用独立按键控制呼吸灯的开关：

#include "stm32f10x.h"

#define LED_PIN     GPIO_Pin_13
#define LED_PORT    GPIOC
#define BUTTON_PIN  GPIO_Pin_0
#define BUTTON_PORT GPIOA

void LED_Init(void);
void Button_Init(void);
void Delay_ms(uint32_t ms);

int main(void)
{
    uint8_t led_value = 0;
    uint8_t button_status = 0;

    LED_Init();
    Button_Init();

    while (1)
    {
        button_status = GPIO_ReadInputDataBit(BUTTON_PORT, BUTTON_PIN);
        if (button_status == 1)
        {
            led_value = !led_value;
            if (led_value == 1)
            {
                for (int i = 0; i < 255; i++)
                {
                    TIM_SetCompare1(TIM2, i);
                    Delay_ms(10);
                }
            }
            else
            {
                for (int i = 255; i >= 0; i--)
                {
                    TIM_SetCompare1(TIM2, i);
                    Delay_ms(10);
                }
            }
        }
    }
}

void LED_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

    GPIO_InitStruct.GPIO_Pin = LED_PIN;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(LED_PORT, &GPIO_InitStruct);

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;

    TIM_TimeBaseInitStruct.TIM_Prescaler = 72 - 1;
    TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInitStruct.TIM_Period = 1000 - 1;
    TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;

    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStruct);

    TIM_OCInitTypeDef TIM_OCInitStruct;

    TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStruct.TIM_OutputNState = TIM_OutputNState_Disable;
    TIM_OCInitStruct.TIM_Pulse = 0;
    TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OCInitStruct.TIM_OCNPolarity = TIM_OCNPolarity_High;
    TIM_OCInitStruct.TIM_OCIdleState = TIM_OCIdleState_Reset;
    TIM_OCInitStruct.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

    TIM_OC1Init(TIM2, &TIM_OCInitStruct);

    TIM_Cmd(TIM2, ENABLE);
}

void Button_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitStruct.GPIO_Pin = BUTTON_PIN;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(BUTTON_PORT, &GPIO_InitStruct);
}

void Delay_ms(uint32_t ms)
{
    uint32_t delay = ms * 12000;
    while (delay--)
        ;
}

在这段代码中，首先需要定义LED和BUTTON的引脚号码和端口号码，然后使用`LED_Init`和`Button_Init`函数分