gypmp280驱动代码

以下是Gy-271（BMP280）传感器的驱动代码示例。请注意，具体的实现可能根据使用的硬件平台和编程语言而有所不同。这里给出的示例是基于Arduino平台和C语言编写的。

#include <Wire.h>

#define BMP280_ADDRESS 0x76

#define BMP280_DIG_T1_LSB_REG 0x88
#define BMP280_DIG_T1_MSB_REG 0x89
#define BMP280_DIG_T2_LSB_REG 0x8A
#define BMP280_DIG_T2_MSB_REG 0x8B
#define BMP280_DIG_T3_LSB_REG 0x8C
#define BMP280_DIG_T3_MSB_REG 0x8D
#define BMP280_DIG_P1_LSB_REG 0x8E
#define BMP280_DIG_P1_MSB_REG 0x8F
#define BMP280_DIG_P2_LSB_REG 0x90
#define BMP280_DIG_P2_MSB_REG 0x91
#define BMP280_DIG_P3_LSB_REG 0x92
#define BMP280_DIG_P3_MSB_REG 0x93
#define BMP280_DIG_P4_LSB_REG 0x94
#define BMP280_DIG_P4_MSB_REG 0x95
#define BMP280_DIG_P5_LSB_REG 0x96
#define BMP280_DIG_P5_MSB_REG 0x97
#define BMP280_DIG_P6_LSB_REG 0x98
#define BMP280_DIG_P6_MSB_REG 0x99
#define BMP280_DIG_P7_LSB_REG 0x9A
#define BMP280_DIG_P7_MSB_REG 0x9B
#define BMP280_DIG_P8_LSB_REG 0x9C
#define BMP280_DIG_P8_MSB_REG 0x9D
#define BMP280_DIG_P9_LSB_REG 0x9E
#define BMP280_DIG_P9_MSB_REG 0x9F
#define BMP280_CTRL_MEAS_REG 0xF4
#define BMP280_STATUS_REG 0xF3
#define BMP280_TEMP_MSB_REG 0xFA
#define BMP280_TEMP_LSB_REG 0xFB
#define BMP280_TEMP_XLSB_REG 0xFC
#define BMP280_PRESS_MSB_REG 0xF7
#define BMP280_PRESS_LSB_REG 0xF8
#define BMP280_PRESS_XLSB_REG 0xF9

uint16_t dig_T1;
int16_t dig_T2, dig_T3;
uint16_t dig_P1;
int16_t dig_P2, dig_P3, dig_P4, dig_P5, dig_P6, dig_P7, dig_P8, dig_P9;

void setup() {
  Serial.begin(9600);
  Wire.begin();

  // Read calibration values
  dig_T1 = read_uint16(BMP280_DIG_T1_LSB_REG);
  dig_T2 = read_int16(BMP280_DIG_T2_LSB_REG);
  dig_T3 = read_int16(BMP280_DIG_T3_LSB_REG);
  dig_P1 = read_uint16(BMP280_DIG_P1_LSB_REG);
  dig_P2 = read_int16(BMP280_DIG_P2_LSB_REG);
  dig_P3 = read_int16(BMP280_DIG_P3_LSB_REG);
  dig_P4 = read_int16(BMP280_DIG_P4_LSB_REG);
  dig_P5 = read_int16(BMP280_DIG_P5_LSB_REG);
  dig_P6 = read_int16(BMP280_DIG_P6_LSB_REG);
  dig_P7 = read_int16(BMP280_DIG_P7_LSB_REG);
  dig_P8 = read_int16(BMP280_DIG_P8_LSB_REG);
  dig_P9 = read_int16(BMP280_DIG_P9_LSB_REG);

  // Configure sensor
  write_byte(BMP280_CTRL_MEAS_REG, 0b10110111); // Temperature oversampling x16, pressure oversampling x16, normal mode
}

void loop() {
  // Read temperature
  int32_t adc_T = read_int24(BMP280_TEMP_MSB_REG);
  int32_t var1 = ((((adc_T >> 3) - ((int32_t)dig_T1 << 1))) * ((int32_t)dig_T2)) >> 11;
  int32_t var2 = (((((adc_T >> 4) - ((int32_t)dig_T1)) * ((adc_T >> 4) - ((int32_t)dig_T1))) >> 12) * ((int32_t)dig_T3)) >> 14;
  int32_t t_fine = var1 + var2;
  float T = (t_fine * 0.00390625);

  // Read pressure
  int32_t adc_P = read_int24(BMP280_PRESS_MSB_REG);
  var1 = (((int32_t)t_fine) >> 1) - (int32_t)64000;
  var2 = (((var1 >> 2) * (var1 >> 2)) >> 11) * ((int32_t)dig_P6);
  var2 = var2 + ((var1 * ((int32_t)dig_P5)) << 1);
  var2 = (var2 >> 2) + (((int32_t)dig_P4) << 16);
  var1 = (((dig_P3 * (((var1 >> 2) * (var1 >> 2)) >> 13)) >> 3) + ((((int32_t)dig_P2) * var1) >> 1)) >> 18;
  var1 = ((((32768 + var1)) * ((int32_t)dig_P1)) >> 15);
  float P;
  if (var1 == 0) {
    P = 0;
  } else {
    int32_t p = (((uint32_t)(((int32_t)1048576) - adc_P) - (var2 >> 12))) * 3125;
    if (p < 0x80000000) {
      p = (p << 1) / ((uint32_t)var1);
    } else {
      p = (p / (uint32_t)var1) * 2;
    }
    var1 = (((int32_t)dig_P9) * ((int32_t)(((p >> 3) * (p >> 3)) >> 13))) >> 12;
    var2 = (((int32_t)(p >> 2)) * ((int32_t)dig_P8)) >> 13;
    P = ((float)(p + ((var1 + var2 + dig_P7) >> 4))) / 100.0;
  }

  Serial.print("Temperature: ");
  Serial.print(T);
  Serial.print(" degC, Pressure: ");
  Serial.print(P);
  Serial.println(" hPa");
  delay(1000);
}

void write_byte(uint8_t reg, uint8_t value) {
  Wire.beginTransmission(BMP280_ADDRESS);
  Wire.write(reg);
  Wire.write(value);
  Wire.endTransmission();
}

uint8_t read_byte(uint8_t reg) {
  Wire.beginTransmission(BMP280_ADDRESS);
  Wire.write(reg);
  Wire.endTransmission(false);
  Wire.requestFrom(BMP280_ADDRESS, 1);
  return Wire.read();
}

uint16_t read_uint16(uint8_t reg) {
  Wire.beginTransmission(BMP280_ADDRESS);
  Wire.write(reg);
  Wire.endTransmission(false);
  Wire.requestFrom(BMP280_ADDRESS, 2);
  return (Wire.read() << 8) | Wire.read();
}

int16_t read_int16(uint8_t reg) {
  return (int16_t)read_uint16(reg);
}

uint32_t read_uint24(uint8_t reg) {
  Wire.beginTransmission(BMP280_ADDRESS);
  Wire.write(reg);
  Wire.endTransmission(false);
  Wire.requestFrom(BMP280_ADDRESS, 3);
  return (Wire.read() << 16) | (Wire.read() << 8) | Wire.read();
}

int32_t read_int24(uint8_t reg) {
  uint32_t val = read_uint24(reg);
  if (val & 0x800000) {
    val |= 0xFF000000;
  }
  return (int32_t)val;
}

这段代码包含了BMP280传感器的初始化和读取数据的函数。它使用了I2C接口与传感器通信，并根据传感器的寄存器格式读取和解析温度和气压数据。如果您使用的是其他硬件平台或编程语言，请根据传感器的规格书和相关资料进行相应的修改。