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標題: stm32單片機呼吸燈主要程序 [打印本頁]

作者: lmalma 時間: 2023-2-11 10:54
標題: stm32單片機呼吸燈主要程序
1 主程序
#include "stm32f10x.h"                // Device header
#include "Delay.h"
#include "OLED.h"
#include "PWM.h"

uint8_t i;

int main(void)
{
      OLED_Init();
      PWM_Init();

      while (1)
      {
            for (i = 0; i <= 100; i++)
            {
                     PWM_SetCompare1(i);
                     Delay_ms(10);
            }
            for (i = 0; i <= 100; i++)
            {
                     PWM_SetCompare1(100 - i);
                     Delay_ms(10);
            }
      }
}
2  端口定義
/*引腳配置*/
#define OLED_W_SCL(x)             GPIO_WriteBit(GPIOB, GPIO_Pin_8, (BitAction)(x))
#define OLED_W_SDA(x)             GPIO_WriteBit(GPIOB, GPIO_Pin_9, (BitAction)(x))

/*引腳初始化*/
void OLED_I2C_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

      GPIO_InitTypeDef GPIO_InitStructure;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
      GPIO_Init(GPIOB, &GPIO_InitStructure);
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
      GPIO_Init(GPIOB, &GPIO_InitStructure);

      OLED_W_SCL(1);
      OLED_W_SDA(1);
}
3 PWM 定時器設置
void PWM_Init(void)
{
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

//       RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
//       GPIO_PinRemapConfig(GPIO_PartialRemap1_TIM2, ENABLE);
//       GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);

      GPIO_InitTypeDef GPIO_InitStructure;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;             //GPIO_Pin_15;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      TIM_InternalClockConfig(TIM2);

      TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
      TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
      TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
      TIM_TimeBaseInitStructure.TIM_Period = 100 - 1;             //ARR
      TIM_TimeBaseInitStructure.TIM_Prescaler = 720 - 1;             //PSC
      TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
      TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStructure);

      TIM_OCInitTypeDef TIM_OCInitStructure;
      TIM_OCStructInit(&TIM_OCInitStructure);
      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
      TIM_OCInitStructure.TIM_Pulse = 0;             //CCR
      TIM_OC1Init(TIM2, &TIM_OCInitStructure);

      TIM_Cmd(TIM2, ENABLE);
}

void PWM_SetCompare1(uint16_t Compare)
{
      TIM_SetCompare1(TIM2, Compare);
}

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