STM32控制三个呼吸灯
时间: 2023-06-17 12:06:20 浏览: 57
如果你想使用STM32控制三个呼吸灯,可以按照以下步骤进行:
1. 首先确定你所使用的STM32型号,然后配置相应的开发环境(如Keil、STM32CubeIDE等)。
2. 在代码中定义三个GPIO口,用于控制三个呼吸灯的亮度。可以使用PWM控制器来实现呼吸灯的效果。
3. 在代码中编写呼吸灯的控制逻辑。可以使用定时器来控制PWM波形的周期和占空比,从而实现呼吸灯的效果。具体的实现方式可以参考下面的代码示例。
```c
#include "stm32f4xx.h"
#define LED1_PIN GPIO_Pin_0
#define LED2_PIN GPIO_Pin_1
#define LED3_PIN GPIO_Pin_2
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = LED1_PIN | LED2_PIN | LED3_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource0, GPIO_AF_TIM2);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource1, GPIO_AF_TIM2);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_TIM2);
}
void TIM_Configuration(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 = 840 - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
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_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC3Init(TIM2, &TIM_OCInitStructure);
TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_Cmd(TIM2, ENABLE);
}
void LED_Update(uint16_t led1, uint16_t led2, uint16_t led3)
{
TIM_OC1InitTypeDef TIM_OCInitStructure;
TIM_OC2InitTypeDef TIM_OCInitStructure;
TIM_OC3InitTypeDef TIM_OCInitStructure;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_Pulse = led1;
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse = led2;
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse = led3;
TIM_OC3Init(TIM2, &TIM_OCInitStructure);
}
int main(void)
{
uint16_t led1 = 0, led2 = 0, led3 = 0;
uint8_t dir1 = 1, dir2 = 1, dir3 = 1;
GPIO_Configuration();
TIM_Configuration();
while (1)
{
if (led1 == 1000)
dir1 = 0;
else if (led1 == 0)
dir1 = 1;
if (led2 == 1000)
dir2 = 0;
else if (led2 == 0)
dir2 = 1;
if (led3 == 1000)
dir3 = 0;
else if (led3 == 0)
dir3 = 1;
led1 += dir1 ? 10 : -10;
led2 += dir2 ? 20 : -20;
led3 += dir3 ? 30 : -30;
LED_Update(led1, led2, led3);
Delay(10);
}
}
```
在上面的代码中,我们使用了TIM2定时器和PA0、PA1、PA2三个GPIO口来控制三个呼吸灯的亮度。首先,我们在GPIO_Configuration()函数中初始化了三个GPIO口,并将其配置为复用模式,使用TIM2输出PWM波形。然后,在TIM_Configuration()函数中初始化了TIM2定时器,并配置了三个输出通道的PWM波形。最后,在main()函数中,我们使用一个循环来不断改变三个呼吸灯的亮度,从而实现呼吸灯的效果。
注意:上面的代码仅供参考,具体的实现方式可能因为STM32型号、开发环境等不同而有所差异。在实际应用中,请根据具体情况进行修改。