基于STM32智能雨刷器
功能演示
基于STM32智能雨刷器
- 中段
- PWM
- ADC
使用雨滴传感器ADC传输给stm32，stm32实时检测雨滴信号，然后根据判断控制PWM按了实现舵机的不同动作，按钮触发中断控制PWM
主函数 main.c
#include "led.h" #include "delay.h" #include "key.h" #include "sys.h" #include "usart.h" #include "exti.h" #include "beep.h" #include "timer.h" #include "adc.h" int main(void) {
u16 adcx; int i = 0;//用于舵机转动的for循环 int frequency = 175;//舵机转动的初始角度 175-195 float temp; //通过ADC转换获得雨滴传感器的值 int integer; delay_init(); //延迟函数初始化 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置NVIC中断分组2:2抢占优先级，2响应优先级 uart_init(115200); //串口初始化为115200 LED_Init(); ///初始化和LED连接的硬件接口 BEEP_Init(); ///初始化蜂鸣器IO EXTIX_Init(); /// LED0=0; ///先点红灯 TIM3_PWM_Init(199,
7199
)
;
//不分频。PWM频率=72000000/900=80Khz
Adc_Init
(
)
;
//ADC初始化
while
(
1
)
{
adcx
=
Get_Adc_Average
(ADC_Channel_1
,
2
)
; temp
=
(
float
)adcx
*
(
3.3
/
4096
)
; temp
*
=
100
; integer
= temp
;
if
(integer
> NUMERICAL_THREEHUNDRED
&& integer
< NUMERICAL_FOURHUNDRED
)
//不下雨
{
delay_ms
(
1
)
;
}
if
(integer
> NUMERICAL_TWOHUNDREDANDTWENT
&& integer
<= NUMERICAL_THREEHUNDRED
)
//小雨
{
for
(i
=
0
;i
<
20
;i
++
)
{
TIM_SetCompare2
(TIM3
,frequency
)
; frequency
++
;
delay_ms
(DELAYMIN
)
;
}
for
(i
=
0
;i
<
20
;i
++
)
{
TIM_SetCompare2
(TIM3
,frequency
)
; frequency
--
;
delay_ms
(DELAYMIN
)
;
}
}
if
(integer
> NUMERICAL_ONEHUNDREDANDFORTY
&& integer
<= NUMERICAL_TWOHUNDREDANDTWENT
)
//中雨
{
for
(i
=
0
;i
<
20
;i
++
)
{
TIM_SetCompare2
(TIM3
,frequency
)
; frequency
++
;
delay_ms
(DELAYMID
)
;
}
for
(i
=
0
;i
<
20
;i
++
)
{
TIM_SetCompare2
(TIM3
,frequency
)
; frequency
--
;
delay_ms
(DELAYMID
)
;
}
}
if
(integer
> NUMERICAL_TEN
&& integer
<= NUMERICAL_ONEHUNDREDANDFORTY
)
//大雨
{
for
(i
=
0
;i
<
20
;i
++
)
{
TIM_SetCompare2
(TIM3
,frequency
)
; frequency
++
;
delay_ms
(DELAYMAX
)
;
}
for
(i
=
0
;i
<
20
;i
++
)
{
TIM_SetCompare2
(TIM3
,frequency
)
; frequency
--
;
delay_ms
(DELAYMAX
)
;
}
}
//printf("%d\r\n",integer);//串口发送LOG值
//delay_ms(500);
}
}
雨滴传感器数据传输 ADC数模转换，将模拟信号转换成数字信号，以下是配置代码 代码下载链接（开源）https://download.csdn.net/download/m0_48216397/84200504 下面是各个代码简述 adc.h
#ifndef __ADC_H
#define __ADC_H
#include "sys.h"
void Adc_Init(void);
u16 Get_Adc(u8 ch);
u16 Get_Adc_Average(u8 ch,u8 times);
#endif
adc.c
#include "adc.h"
#include "delay.h"
//初始化ADC
//这里仅以规则通道为例
//我们默认将开启通道0~3
void Adc_Init(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_ADC1 , ENABLE ); //使能ADC1通道时钟
RCC_ADCCLKConfig(RCC_PCLK2_Div6); //设置ADC分频因子6 72M/6=12,ADC最大时间不能超过14M
//PA1 作为模拟通道输入引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入引脚
GPIO_Init(GPIOA, &GPIO_InitStructure);
ADC_DeInit(ADC1); //复位ADC1,将外设 ADC1 的全部寄存器重设为缺省值
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC工作模式:ADC1和ADC2工作在独立模式
ADC_InitStructure.ADC_ScanConvMode = DISABLE; //模数转换工作在单通道模式
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //模数转换工作在单次转换模式
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //转换由软件而不是外部触发启动
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //ADC数据右对齐
ADC_InitStructure.ADC_NbrOfChannel = 1; //顺序进行规则转换的ADC通道的数目
ADC_Init(ADC1, &ADC_InitStructure); //根据ADC_InitStruct中指定的参数初始化外设ADCx的寄存器
ADC_Cmd(ADC1, ENABLE); //使能指定的ADC1
ADC_ResetCalibration(ADC1); //使能复位校准
while(ADC_GetResetCalibrationStatus(ADC1)); //等待复位校准结束
ADC_StartCalibration(ADC1); //开启AD校准
while(ADC_GetCalibrationStatus(ADC1)); //等待校准结束
// ADC_SoftwareStartConvCmd(ADC1, ENABLE); //使能指定的ADC1的软件转换启动功能
}
//获得ADC值
//ch:通道值 0~3
u16 Get_Adc(u8 ch)
{
//设置指定ADC的规则组通道，一个序列，采样时间
ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_239Cycles5 ); //ADC1,ADC通道,采样时间为239.5周期
ADC_SoftwareStartConvCmd(ADC1, ENABLE); //使能指定的ADC1的软件转换启动功能
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));//等待转换结束
return ADC_GetConversionValue(ADC1); //返回最近一次ADC1规则组的转换结果
}
u16 Get_Adc_Average(u8 ch,u8 times)
{
u32 temp_val=0;
u8 t;
for(t=0;t<times;t++)
{
temp_val+=Get_Adc(ch);
delay_ms(5);
}
return temp_val/times;
}
PWM时钟配置 time.h
#ifndef __TIMER_H
#define __TIMER_H
#include "sys.h"
void TIM3_Int_Init(u16 arr,u16 psc);
void TIM3_PWM_Init(u16 arr,u16 psc);
#endif
time.c
#include "timer.h"
#include "led.h"
#include "usart.h"
//通用定时器3中断初始化
//这里时钟选择为APB1的2倍，而APB1为36M
//arr：自动重装值。
//psc：时钟预分频数
//这里使用的是定时器3!
void TIM3_Int_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //时钟使能
TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值 计数到5000为500ms
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 10Khz的计数频率
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //使能指定的TIM3中断,允许更新中断
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级0级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级3级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
TIM_Cmd(TIM3, ENABLE); //使能TIMx外设
}
//定时器3中断服务程序
void TIM3_IRQHandler(void) //TIM3中断
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查指定的TIM中断发生与否:TIM 中断源
{
TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源
LED1=!LED1;
}
}
//TIM3 PWM部分初始化
//PWM输出初始化
//arr：自动重装值
//psc：时钟预分频数
void TIM3_PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //使能定时器3时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE); //使能GPIO外设和AFIO复用功能模块时钟
GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE); //Timer3部分重映射 TIM3_CH2->PB5
//设置该引脚为复用输出功能,输出TIM3 CH2的PWM脉冲波形 GPIOB.5
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //TIM_CH2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //TIM_CH2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE, &GPIO_InitStructure);//初始化GPIO
//初始化TIM3
TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
//初始化TIM3 Channel2 PWM模式
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
TIM_OC2Init(TIM3, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM3 OC2
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable); //使能TIM3在CCR2上的预装载寄存器
TIM_Cmd(TIM3, ENABLE); //使能TIM3
}
中断配置 exti.h
#ifndef __EXTI_H
#define __EXIT_H
#include "sys.h"
void EXTIX_Init(void);//外部中断初始化
#endif
exti.c
#include "exti.h"
#include "led.h"
#include "key.h"
#include "delay.h"
#include "usart.h"
#include "beep.h"
void EXTIX_Init(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
KEY_Init(); // 按键端口初始化
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //使能复用功能时钟
//GPIOE.3 中断线以及中断初始化配置 下降沿触发 //KEY1
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource3);
EXTI_InitStructure.EXTI_Line=EXTI_Line3;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器
//GPIOE.4 中断线以及中断初始化配置 下降沿触发 //KEY0
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource4);
EXTI_InitStructure.EXTI_Line=EXTI_Line4;
EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器
//GPIOA.0 中断线以及中断初始化配置 上升沿触发 PA0 WK_UP
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);
EXTI_InitStructure.EXTI_Line=EXTI_Line0;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; //使能按键WK_UP所在的外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2，
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn; //使能按键KEY1所在的外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01; //子优先级1
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn; //使能按键KEY0所在的外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00; //子优先级0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
}
//外部中断0服务程序
void EXTI0_IRQHandler(void)//亮度最亮
{
delay_ms(10);//消抖
if(WK_UP==1) //WK_UP按键
{
for(i = 0;i<10;i++)
{
for(i = 0;i<20;i++)
{
TIM_SetCompare2(TIM3,frequency);
frequency++;
delay_ms(DELAYMIN);
}
for(i = 0;i<20;i++)
{
TIM_SetCompare2(TIM3,frequency);
frequency--;
delay_ms(DELAYMIN);
}
}
delay_ms(1000);
}
EXTI_ClearITPendingBit(EXTI_Line0); //清除LINE0上的中断标志位
}
//外部中断3服务程序
void EXTI3_IRQHandler(void)//亮度
{
delay_ms(10);//消抖
if(KEY1==0) //按键KEY1
{
for(i = 0;i<10;i++)
{
for(i = 0;i<20;i++)
{
TIM_SetCompare2(TIM3,frequency);
frequency++;
delay_ms(DELAYMIN);
}
for(i = 0;i<20;i++)
{
TIM_SetCompare2(TIM3,frequency);
frequency--;
delay_ms(DELAYMIN);
}
}
delay_ms(1000);
}
EXTI_ClearITPendingBit(EXTI_Line3); //清除LINE3上的中断标志位
}
void EXTI4_IRQHandler(void)//亮度在中间
{
delay_ms(10);//消抖
if(KEY0==0) //按键KEY0
{
for(i = 0;i<10;i++)
{
for(i = 0;i<20;i++)
{
TIM_SetCompare2(TIM3,frequency);
frequency++;
delay_ms(DELAYMIN);
}
for(i = 0;i<20;i++)
{
TIM_SetCompare2(TIM3,frequency);
frequency--;
delay_ms(DELAYMIN);
}
}
delay_ms(1000);
}
EXTI_ClearITPendingBit(EXTI_Line4); //清除LINE4上的中断标志位
}
按键中断配置 key.h
#ifndef __KEY_H
#define __KEY_H
#include "sys.h"
#define KEY0 GPIO_ReadInputDataBit(GPIOE,GPIO_Pin_4)//读取按键0
#define KEY1 GPIO_ReadInputDataBit(GPIOE,GPIO_Pin_3)//读取按键1
#define WK_UP GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0)//读取按键3(WK_UP)
#