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stm32之智能垃圾桶实战

news 2025/6/29 17:32:30

之前用过51做过一个垃圾桶的小项目，这里用32重新搞了一下。视频的效果和之前一样，可参考这个垃圾桶效果。

一、项目描述（同51）

项目主要是模拟不用手动打开垃圾桶盖，而进行自动操作。自动打开的条件如下：

1、垃圾桶检测到有人靠时自动打开桶盖
2、发生震动时会自动打开
3、可以手动按下按钮打开

二、项目用到的模块（同51）

HC-SR04(超声波模块)
SG90(舵机模块)
MH-sensor-series(振动传感器)
蜂鸣器，一个指示灯

三，模拟引脚配置说明

HC-SR04：trig <---> PB6(output), echo <---> PB7(input),TIM2 用于定时
SG90：PWM(黄色线) <---> PB9(TIM_CH4)
MH-sensor-series: D0<--->PB5(外部中断)
key: PA0(外部中断)
led1: PB8

下面是大致的配置说明

四、代码

完整代码

main函数主要代码如下：

int opened = 0;//使用TIM2来做us级延时函数
void TIM2_Delay_us(uint16_t n_us)
{/* 使能定时器2计数 */__HAL_TIM_ENABLE(&htim2);__HAL_TIM_SetCounter(&htim2, 0);while(__HAL_TIM_GetCounter(&htim2) < ((1 * n_us)-1) );/* 关闭定时器2计数 */__HAL_TIM_DISABLE(&htim2);
}double getDistance() {int count = 0;HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_SET);TIM2_Delay_us(20);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_RESET);while(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_7) == GPIO_PIN_RESET);HAL_TIM_Base_Start(&htim2);__HAL_TIM_SetCounter(&htim2,0);while(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_7) == GPIO_PIN_SET);HAL_TIM_Base_Stop(&htim2);count = __HAL_TIM_GetCounter(&htim2);return 340 * 0.000001 * count * 100 / 2;
}void beep() {HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_RESET);HAL_Delay(100);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_SET);
}/* sg90 -----------------------------------------------*/void initSG90() {HAL_TIM_PWM_Start(&htim4,TIM_CHANNEL_4);__HAL_TIM_SetCompare(&htim4, TIM_CHANNEL_4, 5);
}void openDusbin() {__HAL_TIM_SetCompare(&htim4, TIM_CHANNEL_4, 15);HAL_Delay(2000);
}void closeDusbin() {__HAL_TIM_SetCompare(&htim4, TIM_CHANNEL_4, 5);opened = 0;HAL_Delay(150);
}/* led -----------------------------------------------*/
void openStausLight() {HAL_GPIO_WritePin(GPIOB, GPIO_PIN_8, GPIO_PIN_RESET);
}void closeStausLight() {HAL_GPIO_WritePin(GPIOB, GPIO_PIN_8, GPIO_PIN_SET);
}void tryToOpenDusbin() {if(opened) {HAL_Delay(2000);return;}opened = 1;beep();openDusbin();
}void tryToCloseBusbin() {opened = 0;closeDusbin();
}/* key exti -----------------------------------------------*/
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) {if(GPIO_Pin == GPIO_PIN_0 || GPIO_Pin == GPIO_PIN_5) {if(HAL_GPIO_ReadPin(GPIOA, GPIO_Pin) == GPIO_PIN_SET|| HAL_GPIO_ReadPin(GPIOB, GPIO_Pin) == GPIO_PIN_RESET) {openStausLight();tryToOpenDusbin();}}
}int main(void)
{double distance;HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_TIM4_Init();MX_TIM2_Init();initSG90();HAL_NVIC_SetPriority(SysTick_IRQn,0,0);while (1){distance = getDistance();if(distance < 10) {openStausLight();tryToOpenDusbin();} else {closeStausLight();tryToCloseBusbin();}HAL_Delay(100);}
}