stm32单片机流水灯代码

ID:1073139 · 发表于 2023-4-21 11:37

代码：
#include "stm32f10x.h"
#include "bsp_led.h"
#include "bsp_key.h"

void Tim3_Int_Init(u16 arr,u16 psc);
void TIM3_IRQHandler(void);
int x = 1;
int mode = 0;
int change = 0;
int y = 1;

/**
  * @brief  主函数
  * @param  无
  * @retval 无
  */
int main(void)
{
/* LED 端口初始化 */
LED_GPIO_Config();

while (1)
{
      if (mode==1 && change==0)
      {
         Tim3_Int_Init(4999, 7199);
         change = 1;
      }
      else if (mode==2 && change==0)
      {
         Tim3_Int_Init(7199, 9999);
         change = 1;
      }
      TIM3_IRQHandler();
      if( Key_Scan(KEY2_GPIO_PORT,KEY2_GPIO_PIN) == KEY_ON )
      {
         mode += 1;
         change = 0;
         if (mode >= 5)
         {
            mode = 1;
         }
      }
      if( Key_Scan(KEY1_GPIO_PORT,KEY1_GPIO_PIN) == KEY_ON )
      {
         y += 1;
         LED1_ON;
      }
}
}

void Tim3_Int_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;//配置定时器时钟
NVIC_InitTypeDef NVIC_InitStruct;//配置中断控制器

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);//使能定时器时钟

TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;//设置时钟分割
TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;//设置为向上计数模式
TIM_TimeBaseInitStruct.TIM_Period = arr;//设置在下一个更新时间装入活动的自动重装载寄存器周期的值
TIM_TimeBaseInitStruct.TIM_Prescaler = psc;//预分频值

TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStruct);//初始化

TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);//使能TIM3中断，允许更新中断

NVIC_InitStruct.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 3;
NVIC_Init(&NVIC_InitStruct);//NVIC

TIM_Cmd(TIM3,ENABLE);//使能TIM3
}

void TIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3,TIM_IT_Update) == 1)//检查TIM3更新中断发生与否
{
      TIM_ClearITPendingBit(TIM3,TIM_IT_Update);//清除TIMx更新中断标志
      x += 1;
      switch(mode)
      {
         case 1:
            if (x==1)
            {
                  LED3_OFF;
                  LED1_ON;
            }
            else if (x==2)
            {
                  LED1_OFF;
                  LED2_ON;
            }
            else if (x==3)
            {
                  LED2_OFF;
                  LED3_ON;
                  x = 0;
            }
            break;
         case 2:
            if (x==1)
            {
                  LED2_OFF;
                  LED3_OFF;
                  LED1_ON;
            }
            else if (x==2)
            {
                  LED2_ON;
                  LED3_ON;
                  x = 0;
            }
            break;
         case 3:
            if (y==1)
            {
                  LED3_OFF;
                  LED1_ON;
            }
            else if (y==2)
            {
                  LED1_OFF;
                  LED2_ON;
            }
            else if (y==3)
            {
                  LED2_OFF;
                  LED3_ON;
                  y = 1;
            }
            break;
         default:
            break;
      }

}

}

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