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张莉

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[经验]

RA2L1开发实践之温湿度检测平台

  主要驱动代码
  dht11.c
  /*
  * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date Author Notes
  * 2023-03-15 XiaoDai the first version
  */
  #ifndef SRC_DHT11_C_
  #define SRC_DHT11_C_
  #include “dht11.h”
  #include 《stdio.h》
  #include “hal_data.h”
  #include 《board.h》
  #define DBG_TAG “sensor.asair.dhtxx”
  #ifdef PKG_USING_DHTXX_DEBUG
  #define DBG_LVL DBG_LOG
  #else
  #define DBG_LVL DBG_ERROR
  #endif
  #include 《rtdbg.h》
  /* timing */
  #define DHT1x_BEGIN_TIME 20 /* ms */
  #define DHT2x_BEGIN_TIME 1 /* ms */
  #define DHTxx_PULL_TIME 30 /* us */
  #define DHTxx_REPLY_TIME 100 /* us */
  #define MEASURE_TIME 40 /* us */
  RT_WEAK void rt_hw_us_delay(rt_uint32_t us)
  {
  rt_uint32_t delta;
  us = us * (SysTick-》LOAD / (1000000 / RT_TICK_PER_SECOND));
  delta = SysTick-》VAL;
  while (delta - SysTick-》VAL 《 us) continue;
  }
  /**
  * This function will split a number into two part according to times.
  *
  * @param num the number will be split
  * @param integer the integer part
  * @param decimal the decimal part
  * @param times how many times of the real number (you should use 10 in this case)
  *
  * @Return 0 if num is positive, 1 if num is negative
  */
  int split_int(const int num, int *integer, int *decimal, const rt_uint32_t times)
  {
  int flag = 0;
  if (num 《 0) flag = 1;
  int anum = num《0 ? -num : num;
  *integer = anum / times;
  *decimal = anum % times;
  return flag;
  }
  /**
  * This function will convert temperature in degree Celsius to Kelvin.
  *
  * @param c the temperature indicated by degree Celsius
  *
  * @return the result
  */
  float convert_c2k(float c)
  {
  return c + 273.15;
  }
  /**
  * This function will convert temperature in degree Celsius to Fahrenheit.
  *
  * @param c the temperature indicated by degree Celsius
  *
  * @return the result
  */
  float convert_c2f(float c)
  {
  return c * 1.8 + 32;
  }
  /**
  * This function will convert temperature in degree Fahrenheit to Celsius.
  *
  * @param f the temperature indicated by degree Fahrenheit
  *
  * @return the result
  */
  float convert_f2c(float f)
  {
  return (f - 32) * 0.55555;
  }
  /**
  * This function will read a bit from sensor.
  *
  * @param pin the pin of Dout
  *
  * @return the bit value
  */
  static uint8_t dht_read_bit(const rt_base_t pin)
  {
  uint8_t retry = 0;
  while(rt_pin_read(pin) && retry 《 DHTxx_REPLY_TIME)
  {
  retry++;
  rt_hw_us_delay(1);
  }
  retry = 0;
  while(!rt_pin_read(pin) && retry 《 DHTxx_REPLY_TIME)
  {
  retry++;
  rt_hw_us_delay(1);
  }
  rt_hw_us_delay(MEASURE_TIME);
  return rt_pin_read(pin);
  }
  /**
  * This function will read a byte from sensor.
  *
  * @param pin the pin of Dout
  *
  * @return the byte
  */
  static uint8_t dht_read_byte(const rt_base_t pin)
  {
  uint8_t i, byte = 0;
  for(i=0; i《8; i++)
  {
  byte 《《= 1;
  byte |= dht_read_bit(pin);
  }
  return byte;
  }
  /**
  * This function will read and update data array.
  *
  * @param dev the device to be operated
  *
  * @return RT_TRUE if read successfully, otherwise return RT_FALSE.
  */
  rt_bool_t dht_read(dht_device_t dev)
  {
  RT_ASSERT(dev);
  uint8_t i, retry = 0, sum = 0;
  #ifdef PKG_USING_DHTXX_INTERRUPT_DISABLE
  rt_base_t level;
  #endif
  /* Reset data buffer */
  rt_memset(dev-》data, 0, DHT_DATA_SIZE);
  /* MCU request sampling */
  rt_pin_mode(dev-》pin, PIN_MODE_OUTPUT);
  rt_pin_write(dev-》pin, PIN_LOW);
  if (dev-》type == DHT11) {
  rt_thread_mdelay(DHT1x_BEGIN_TIME); /* Tbe */
  } else {
  rt_thread_mdelay(DHT2x_BEGIN_TIME);
  }
  #ifdef PKG_USING_DHTXX_INTERRUPT_DISABLE
  level = rt_hw_interrupt_disable();
  #endif
  rt_pin_mode(dev-》pin, PIN_MODE_INPUT_PULLUP);
  rt_hw_us_delay(DHTxx_PULL_TIME); /* Tgo */
  /* Waiting for sensor reply */
  while (rt_pin_read(dev-》pin) && retry 《 DHTxx_REPLY_TIME)
  {
  retry++;
  rt_hw_us_delay(1); /* Trel */
  }
  if(retry 》= DHTxx_REPLY_TIME) return RT_FALSE;
  retry = 0;
  while (!rt_pin_read(dev-》pin) && retry 《 DHTxx_REPLY_TIME)
  {
  retry++;
  rt_hw_us_delay(1); /* Treh */
  };
  if(retry 》= DHTxx_REPLY_TIME) return RT_FALSE;
  /* Read data */
  for(i=0; i《DHT_DATA_SIZE; i++)
  {
  dev-》data[i] = dht_read_byte(dev-》pin);
  }
  #ifdef PKG_USING_DHTXX_INTERRUPT_DISABLE
  rt_hw_interrupt_enable(level);
  #endif
  /* Checksum */
  for(i=0; i《DHT_DATA_SIZE-1; i++)
  {
  sum += dev-》data[i];
  }
  if(sum != dev-》data[4]) return RT_FALSE;
  return RT_TRUE;
  }
  /**
  * This function will get the humidity from dhtxx sensor.
  *
  * @param dev the device to be operated
  *
  * @return the humidity value
  */
  rt_int32_t dht_get_humidity(dht_device_t const dev)
  {
  RT_ASSERT(dev);
  rt_int32_t humi = 0;
  switch(dev-》type)
  {
  case DHT11:
  humi = dev-》data[0] * 10 + dev-》data[1];
  break;
  default:
  break;
  }
  return humi;
  }
  /**
  * This function will get the temperature from dhtxx sensor.
  *
  * @param dev the device to be operated
  *
  * @return the temperature value
  */
  rt_int32_t dht_get_temperature(dht_device_t const dev)
  {
  RT_ASSERT(dev);
  rt_int32_t temp = 0;
  switch(dev-》type)
  {
  case DHT11:
  temp = dev-》data[2] * 10 + (dev-》data[3] & 0x7f);
  if(dev-》data[3] & 0x80) {
  temp = -temp;
  }
  break;
  default:
  break;
  }
  return temp;
  }
  /**
  * This function will init dhtxx sensor device.
  *
  * @param dev the device to init
  * @param pin the pin of Dout
  *
  * @return the device handler
  */
  rt_err_t dht_init(struct dht_device *dev, const rt_base_t pin)
  {
  if(dev == NULL)
  return -RT_ERROR;
  dev-》type = DHT_TYPE;
  dev-》pin = pin;
  rt_memset(dev-》data, 0, DHT_DATA_SIZE);
  rt_pin_mode(dev-》pin, PIN_MODE_INPUT_PULLUP);
  return RT_EOK;
  }
  // 1、初始化类型
  dht_device_t dht_create(const rt_base_t pin)
  {
  dht_device_t dev;
  dev = rt_calloc(1, sizeof(struct dht_device));
  if (dev == RT_NULL)
  {
  LOG_E(“Can‘t allocate memory for dhtxx device”);
  return RT_NULL;
  }
  dev-》type = DHT_TYPE;
  dev-》pin = pin;
  rt_memset(dev-》data, 0, DHT_DATA_SIZE);
  rt_pin_mode(dev-》pin, PIN_MODE_INPUT_PULLUP);
  return dev;
  }
  void dht_delete(dht_device_t dev)
  {
  if (dev)
  rt_free(dev);
  }
  #endif /* SRC_DHT11_C_ */
  /*
  * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date Author Notes
  * 2023-03-15 XiaoDai the first version
  */
  #ifndef SRC_DHT11_H_
  #define SRC_DHT11_H_
  dht11.h
  #include 《stdio.h》
  #include 《rthw.h》
  #include 《rtdevice.h》
  #include 《board.h》
  #include 《rtthread.h》
  #define DHTLIB_VERSION “0.9.0”
  #define DHT_DATA_SIZE 5
  /* sensor model type */
  #define DHT11 0
  #define DHT_TYPE DHT11
  struct dht_device
  {
  rt_base_t pin;
  rt_uint8_t type;
  rt_uint8_t data[DHT_DATA_SIZE];
  rt_mutex_t lock;
  };
  typedef struct dht_device *dht_device_t;
  dht_device_t dht_create(const rt_base_t pin);
  void dht_delete(dht_device_t dev);
  rt_err_t dht_init(struct dht_device *dev, const rt_base_t pin);
  rt_bool_t dht_read(dht_device_t dev);
  rt_int32_t dht_get_humidity(dht_device_t dev);
  rt_int32_t dht_get_temperature(dht_device_t dev);
  float convert_c2k(float c);//将摄氏温度转为开氏温度
  float convert_c2f(float c);//将摄氏温度转为华氏温度
  float convert_f2c(float f);//将华氏温度转为摄氏温度
  rt_int32_t split_int(const rt_int32_t num, rt_int32_t *integer,
  rt_int32_t *decimal, const rt_uint32_t times);
  rt_err_t rt_hw_dht_init(const char *name, struct rt_sensor_config *cfg);
  #endif /* SRC_DHT11_H_ */
  0.96oled代码
  void lcd_thread_handler(void *parameter)
  {
  LCD_Init();
  LCD_Fill(0,0,LCD_W,LCD_H,WHITE);
  lcd_show();
  rt_thread_mdelay(1000);
  LCD_Fill(0,0,LCD_W,LCD_H,WHITE);
  while(1)
  {
  lcd_show_pic1();
  rt_thread_mdelay(500);
  }
  }
  if(key_num ==1)
  {
  // u8g2_ClearBuffer(&u8g2);
  u8g2_DrawStr(&u8g2, 1, 40, “LED2 is on”);
  u8g2_SendBuffer(&u8g2);
  }
  else {
  // u8g2_ClearBuffer(&u8g2);
  u8g2_DrawStr(&u8g2, 1, 40, “LED2 is off”);
  u8g2_SendBuffer(&u8g2);
  }
  hal_entry.c
  /*
  * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date Author Notes
  * 2021-10-10 Sherman first version
  */
  #include 《rtthread.h》
  #include “hal_data.h”
  #include 《rtdevice.h》
  #define LED1_PIN “P502” /* Onboard LED1 pins */
  #define LED2_PIN “P501” /* Onboard LED2 pins */
  #define USER_INPUT “P004”
  rt_uint32_t pin ;
  int key_num ;
  void hal_entry(void)
  {
  rt_kprintf(“nHello RT-Thread!n”);
  while (1)
  {
  if( pin == 1)
  {
  rt_kprintf(“nUSER_INPUT push !n”);
  rt_pin_write(LED2,PIN_HIGH);
  }
  rt_thread_mdelay(500);
  }
  }
  void irq_callback_test(void *args)
  {
  static int out ,out2 ;
  rt_kprintf(“n IRQ03 triggered n”);
  rt_uint32_t led1_pin = rt_pin_get(LED1_PIN);
  rt_uint32_t led2_pin = rt_pin_get(LED2_PIN);
  out = rt_pin_read(led1_pin)?PIN_LOW:PIN_HIGH;
  out2 = rt_pin_read(led2_pin)?PIN_LOW:PIN_HIGH;
  rt_pin_write(led1_pin,out);
  rt_pin_write(led2_pin,out2);
  key_num++;
  if( pin == 0 && key_num ==2)
  {
  rt_kprintf(“n LED2 is on !n”);
  rt_pin_write(LED2,PIN_HIGH);
  }
  else {
  rt_kprintf(“n LED2 is off !n”);
  rt_pin_write(LED2,PIN_LOW);
  }
  if(key_num ==2 )
  key_num =0;
  }
  void push_btn(void)
  {
  /* init */
  rt_uint32_t pin = rt_pin_get(USER_INPUT);
  rt_kprintf(“n pin number : 0x%04X n”, pin);
  rt_err_t err = rt_pin_attach_irq(pin, PIN_IRQ_MODE_RISING, irq_callback_test, RT_NULL);
  if (RT_EOK != err)
  {
  rt_kprintf(“n attach irq failed. n”);
  }
  err = rt_pin_irq_enable(pin, PIN_IRQ_ENABLE);
  if (RT_EOK != err)
  {
  rt_kprintf(“n enable irq failed. n”);
  }
  }
  MSH_CMD_EXPORT(push_btn, push_btn);
  偶然之中在源代码中发现官方已经帮我们定义好了有些引脚,所以就没必要重复定义了
2.jpg



原作者:xiaodaidaii

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