stm32温度调节系统的风扇代码
时间: 2023-08-24 18:07:35 浏览: 104
风扇.rar_STM32 温度控制_consonantvuv_saved5vw_stm32 触摸_风扇传感器
好的,下面是一个简单的参考代码,用于基于 stm32 的温度调节系统中控制风扇的转速:
```c
#include "stm32f10x.h"
#define FAN_PIN GPIO_Pin_0
#define FAN_PORT GPIOA
#define ADC_PIN GPIO_Pin_1
#define ADC_PORT GPIOA
#define ADC_CH ADC_Channel_1
#define TEMP_THRESHOLD 30
#define PWM_PERIOD 1000
int main(void)
{
// 初始化 GPIO 和 ADC
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_ADC1, ENABLE);
GPIO_InitStructure.GPIO_Pin = FAN_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(FAN_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = ADC_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(ADC_PORT, &GPIO_InitStructure);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC1, ADC_CH, 1, ADC_SampleTime_55Cycles5);
ADC_Cmd(ADC1, ENABLE);
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));
// 初始化 PWM
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
TIM_OCInitTypeDef TIM_OCInitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
TIM_TimeBaseInitStruct.TIM_Period = PWM_PERIOD - 1;
TIM_TimeBaseInitStruct.TIM_Prescaler = 71;
TIM_TimeBaseInitStruct.TIM_ClockDivision = 0;
TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseInitStruct);
TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_Pulse = 0;
TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM1, &TIM_OCInitStruct);
TIM_Cmd(TIM1, ENABLE);
while(1)
{
// 获取温度数据并控制风扇转速
uint16_t adc_value = ADC_GetConversionValue(ADC1);
float temp = (float)adc_value / 4096 * 3.3 / 0.01;
if(temp > TEMP_THRESHOLD)
{
TIM_SetCompare1(TIM1, PWM_PERIOD / 2);
}
else
{
TIM_SetCompare1(TIM1, 0);
}
}
}
```
这个代码假设您使用的是 stm32f103 系列的芯片,使用了 ADC1 和 TIM1 模块,将风扇控制引脚接在 GPIOA 的 Pin0 上,将温度传感器接在 GPIOA 的 Pin1 上。具体实现时,我们通过 ADC 获取温度传感器的模拟数据,然后将其转换为温度值,根据设定的温度阈值来控制风扇转速。这里使用了 PWM 技术来控制风扇转速,PWM 的周期为 1000,占空比根据温度变化动态调整。希望这个代码能对您有所帮助!
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