stm32f103c8t6最小系统板呼吸灯
时间: 2024-05-25 18:08:53 浏览: 118
stm32f103c8t6最小系统板
STM32F103C8T6是一款基于ARM Cortex-M3内核的微控制器,它具有丰富的外设资源和强大的性能。最小系统板是指将STM32F103C8T6芯片及其相关电路(如晶振、稳压芯片等)集成在一块小型PCB板上的电路板。呼吸灯是指一种LED灯的亮度逐渐变化的效果,常用于视觉效果或者状态指示。
在STM32F103C8T6最小系统板上实现呼吸灯,一般需要通过PWM模块控制LED灯的亮度。具体步骤如下:
1. 配置TIM定时器为PWM输出模式;
2. 配置GPIO口为推挽输出模式,将LED连接到GPIO口上;
3. 编写程序,通过修改TIM定时器的占空比控制LED的亮度,从而实现呼吸灯效果。
以下是一个简单的代码示例,实现了一个呼吸灯效果:
```c
#include "stm32f10x.h"
#include "stm32f10x_tim.h"
#include "stm32f10x_gpio.h"
void TIM_Config(void);
void GPIO_Config(void);
int main(void)
{
TIM_Config();
GPIO_Config();
while (1)
{
for (int i = 0; i < 1000; i++)
{
TIM_SetCompare1(TIM2, i);
Delay(5);
}
for (int i = 1000; i > 0; i--)
{
TIM_SetCompare1(TIM2, i);
Delay(5);
}
}
}
void TIM_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Period = 1000 - 1;
TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_Cmd(TIM2, ENABLE);
}
void GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void Delay(uint32_t nCount)
{
for (; nCount != 0; nCount--);
}
```
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