技能梳理38@stm32+CC2530+超声波+光敏+oled

技能梳理38@stm32+CC2530+超声波+光敏+oled

1、项目简介

2、实现逻辑

#主从机使用zigbee通信
#主机oled显示当前停车场位置图
#从机通过超声波和光敏一起检测是否有车
#当某位置车辆进出，在主机上oled进行提示

3、应用场景

#车辆无线检测
#货架商品有无检测

4、核心代码梳理

int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */
	char buf[256];
	uint16_t send_flag = 1;
  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  MX_I2C1_Init();
  MX_TIM2_Init();
  /* USER CODE BEGIN 2 */
#ifdef MASTER
	__HAL_UART_ENABLE_IT(&huart1,UART_IT_RXNE);//open uart1 RXNE
  OLED_Init();			
  OLED_Clear();
  //oled_print(0, 0, "hello");  //first 衿 64是半个屏 second 刿 2是一个错位间跿
	OLED_ShowString(0,0,"---------------",16);
	OLED_ShowString(0,2,"|____|____|____|",16);
	OLED_ShowString(0,4,"|    |    |    |",16);
	OLED_ShowString(0,6,"---------------",16);
	//oled_print(20, 4, "*");
	//oled_print(100, 4, "*");
#endif
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
		HAL_Delay(500);
#ifdef SLAVE_CHECK1
			if ((HAL_GPIO_ReadPin(light_GPIO_Port, light_Pin) == GPIO_PIN_RESET) || (HC_SR04_Measure() > 20)) //无车 //
			{
				if(buf[1] == '1')
				{
					send_flag = 1;
					HAL_GPIO_WritePin(led_GPIO_Port, led_Pin, GPIO_PIN_SET);
				}
				sprintf(buf, "10");
			}
			else
			{
				if(buf[1] == '0')
				{
					send_flag = 1;
					HAL_GPIO_WritePin(led_GPIO_Port, led_Pin, GPIO_PIN_RESET);
				}
				sprintf(buf, "11");
			}
		  
			if(send_flag == 1)
			{
				send_flag = 0;
				HAL_UART_Transmit(&huart1, (uint8_t*)buf, strlen(buf), HAL_MAX_DELAY);
			}
			
#endif
		
#ifdef SLAVE_CHECK2
			if ((HAL_GPIO_ReadPin(light_GPIO_Port, light_Pin) == GPIO_PIN_RESET) || (HC_SR04_Measure() > 20)) //无车 //
			{
				if(buf[1] == '1')
				{
					send_flag = 1;
					HAL_GPIO_WritePin(led_GPIO_Port, led_Pin, GPIO_PIN_SET);
				}
				sprintf(buf, "20");
			}
			else
			{
				if(buf[1] == '0')
				{
					send_flag = 1;
					HAL_GPIO_WritePin(led_GPIO_Port, led_Pin, GPIO_PIN_RESET);
				}
				sprintf(buf, "21");
			}
		  
			if(send_flag == 1)
			{
				send_flag = 0;
				HAL_UART_Transmit(&huart1, (uint8_t*)buf, strlen(buf), HAL_MAX_DELAY);
			}
		
#endif
		
#ifdef MASTER
		if(rx_ok)
		{
			rx_ok = 0;
			if(rx_order1 == 1)  //YES
			{
					oled_print(20, 4, "*");
			}
      else 
      {
					oled_print(20, 4, " ");
      }
			
			if(rx_order2 == 1)  //YES
			{
					oled_print(100, 4, "*");
			}
      else 
      {
					oled_print(100, 4, " ");
      }
		}
		
#endif
  }
  /* USER CODE END 3 */
}


void RCC_delay_us(uint32_t udelay)
{

	uint32_t i=0;
	for(i=0;i<udelay;i++){
		__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
	}
}

static void HC_SR04_Start()
{
    /* output high level */
    HAL_GPIO_WritePin(TRIG_GPIO_Port, TRIG_Pin, GPIO_PIN_SET);
    
    /* maintain high level at least 10us */
    RCC_delay_us(10);
    
    /* resume low level */
    HAL_GPIO_WritePin(TRIG_GPIO_Port, TRIG_Pin, GPIO_PIN_RESET);
}

//return cm
double HC_SR04_Measure()
{
    uint32_t tick_us;
    
    
    HC_SR04_Start();
    
    __HAL_TIM_SetCounter(&htim2, 0);
    
    /* waitting for start of the high level through echo pin */
    while (HAL_GPIO_ReadPin(ECHO_GPIO_Port, ECHO_Pin) == GPIO_PIN_RESET);

    /* start the tim and enable the interrupt */
    HAL_TIM_Base_Start(&htim2);
    
    /* waitting for end of the high level through echo pin */
    while (HAL_GPIO_ReadPin(ECHO_GPIO_Port, ECHO_Pin) == GPIO_PIN_SET);
    
    /* stop the tim */
    HAL_TIM_Base_Stop(&htim2);
    
    /* get the time of high level */
    tick_us = __HAL_TIM_GetCounter(&htim2);
    
    /* calc distance in unit cm */
    double dis = (double)(tick_us/1000000.0) * 340.0 / 2.0 *100.0;
    
    return dis;
}

void Delay(__IO uint32_t nCount) {
  while(nCount--) {
  }
}

//oled display
void oled_print(uint8_t x, uint8_t y, char *str)
{
    OLED_ShowString(x,y,str,16);
}

5、部分参考资料

6、注意事项

#zigbee模块买的一家现成的模块，比较便宜十几块钱
#zigbee需要一个协调器和两个路由器
#原理图上画出了zigbee即cc2530的详细设计图
#oled上有车时，对应位置使用“*”指代
#主从机程序写到一个工程文件中了，使用宏定义进行区分

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