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添加BMP280_I2C
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RB
parent
20e0cec93f
commit
7bf1f90d08
301
User/device/bmp280_i2c.c
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301
User/device/bmp280_i2c.c
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#include "bmp280_i2c.h"
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#include "bsp/i2c.h"
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#define I2C_Handle BSP_I2C_GetHandle(BSP_I2C_BMP280)
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/**
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* @brief 读寄存器
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* @param regAdd 寄存器开始地址
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* @param pdata 存储数据的指针
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* @param size 寄存器个数
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* @retval 无
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*/
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void bmp280_readReg(uint8_t regAdd, uint8_t *pdata, uint8_t size) {
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HAL_I2C_Mem_Read(I2C_Handle, BMP280_I2C_ADDR << 1, regAdd, I2C_MEMADD_SIZE_8BIT, pdata, size, 1000);
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}
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/**
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* @brief 写1个寄存器
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* @param regAdd 寄存器开始地址
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* @param pdata 存储数据的指针
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* @retval 0 写入成功
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* 1 写入失败
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*/
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uint8_t bmp280_writeReg(uint8_t regAdd, uint8_t *pdata) {
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if (HAL_I2C_Mem_Write(I2C_Handle, BMP280_I2C_ADDR << 1, regAdd, I2C_MEMADD_SIZE_8BIT, pdata, 1, 1000) == HAL_OK) {
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return 0;
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}
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return 1;
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}
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/**
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* @brief 读取设备物理id，用于调试
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* @param 无
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* @retval 设备id
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*/
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uint8_t bmp280_get_id(void) {
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uint8_t temp = 0;
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bmp280_readReg(BMP280_ID, &temp, 1);
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return temp;
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}
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/**
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* @brief 重启设备
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* @param 无
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* @retval 0 重启成功
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* 1 重启失败
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*/
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uint8_t bmp280_reset(void) {
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uint8_t temp = 0xB6;
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return bmp280_writeReg(BMP280_RESET, &temp);
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}
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/**
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* @brief 获取设备状态
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* @param 无
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* @retval 0 空闲
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* 1 正在测量或者正在复制
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*/
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uint8_t bmp280_getStatus(void) {
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uint8_t temp = 0;
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bmp280_readReg(BMP280_STATUS, &temp, 1);
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return (temp & 0x09) ? 1 : 0;
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}
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/**
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* @brief 工作模式设置推荐
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* @param mode 0 睡眠模式
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* 1 单次测量模式，测量完成后回到休眠模式
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* 2 连续测量模式
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* @retval 0 设置成功
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* 1 设置失败
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*/
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uint8_t bmp280_setMode(uint8_t mode)
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{
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uint8_t temp=0;
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bmp280_readReg(BMP280_CTRL_MEAS,&temp,1);
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switch(mode)
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{
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case 0:
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temp&=0xFC;
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break;
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case 1:
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temp&=0xFC;
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temp|=0x01;
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break;
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case 2:
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temp&=0xFC;
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temp|=0x03;
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break;
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default:
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return 1;
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}
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return bmp280_writeReg(BMP280_CTRL_MEAS,&temp);
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}
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/**
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* @brief 过采样设置
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* @param mode temp&press 0 禁用
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* 1 过采样×1
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* 2 过采样×2
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* 3 过采样×4
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* .. .....
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* 5 过采样×16
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* @retval 0 设置成功
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* 1 设置失败
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*/
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uint8_t bmp280_setOversampling(uint8_t osrs_p,uint8_t osrs_t)
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{
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uint8_t temp=0;
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bmp280_readReg(BMP280_CTRL_MEAS,&temp,1);
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temp&=0xE3;
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osrs_p = osrs_p<<2;
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osrs_p&= 0x1C;
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temp|=osrs_p;
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temp&=0x1F;
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osrs_t = osrs_t<<5;
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osrs_t&= 0xE0;
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temp|=osrs_t;
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return bmp280_writeReg(BMP280_CTRL_MEAS,&temp);
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}
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/**
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* @brief 滤波器系数和采样间隔时间设置
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* @param Standbyt 0 0.5ms filter 0 关闭滤波器
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* 1 62.5ms 1 2
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* 2 125ms 2 4
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* 3 250ms 3 8
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* 4 500ms 4 16
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* 5 1000ms
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* 6 2000ms
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* 7 4000ms
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* @retval 0 设置成功
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* 1 设置失败
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*/
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uint8_t bmp280_setConfig(uint8_t Standbyt,uint8_t filter)
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{
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uint8_t temp=0;
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temp = Standbyt<<5;
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filter&=0x07;
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filter=filter<<2;
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temp|=filter;
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return bmp280_writeReg(BMP280_CONFIG,&temp);
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}
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/**
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* @brief 获取校准系数
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* @param calib 储存系数的结构体
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* @retval 无
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*/
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void bmp280_getCalibration(bmp280_calib *calib)
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{
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uint8_t buf[20];
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bmp280_readReg(BMP280_DIGT,buf,6);
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calib->dig_t1 =(uint16_t)(bmp280_msblsb_to_u16(buf[1], buf[0]));
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calib->dig_t2 =(int16_t)(bmp280_msblsb_to_u16(buf[3], buf[2]));
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calib->dig_t3 =(int16_t)(bmp280_msblsb_to_u16(buf[5], buf[4]));
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bmp280_readReg(BMP280_DIGP,buf,18);
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calib->dig_p1 = (uint16_t)(bmp280_msblsb_to_u16(buf[1], buf[0]));
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calib->dig_p2 =(int16_t)(bmp280_msblsb_to_u16(buf[3], buf[2]));
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calib->dig_p3 =(int16_t)(bmp280_msblsb_to_u16(buf[5], buf[4]));
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calib->dig_p4 =(int16_t)(bmp280_msblsb_to_u16(buf[7], buf[6]));
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calib->dig_p5 =(int16_t)(bmp280_msblsb_to_u16(buf[9], buf[8]));
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calib->dig_p6 =(int16_t)(bmp280_msblsb_to_u16(buf[11], buf[10]));
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calib->dig_p7 =(int16_t)(bmp280_msblsb_to_u16(buf[13], buf[12]));
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calib->dig_p8 =(int16_t)(bmp280_msblsb_to_u16(buf[15], buf[14]));
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calib->dig_p9 =(int16_t)(bmp280_msblsb_to_u16(buf[17], buf[16]));
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}
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/**
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* @brief 获取温度
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* @param calib 系数的结构体
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* *temperature 温度值指针
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* *t_fine 精细分辨率温度值指针
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* @retval 无
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*/
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void bmp280_getTemperature(bmp280_calib *calib,double *temperature,int32_t *t_fine)
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{
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uint8_t buf[3];
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uint32_t data_xlsb;
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uint32_t data_lsb;
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uint32_t data_msb;
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int32_t uncomp_temperature;
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double var1, var2;
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bmp280_readReg(BMP280_TEMP,buf,3);
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data_msb = (int32_t)buf[0] << 12;
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data_lsb = (int32_t)buf[1] << 4;
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data_xlsb = (int32_t)buf[2] >> 4;
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uncomp_temperature = (int32_t)(data_msb | data_lsb | data_xlsb);
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var1 = (((double) uncomp_temperature) / 16384.0 - ((double) calib->dig_t1) / 1024.0) *
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((double) calib->dig_t2);
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var2 =
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((((double) uncomp_temperature) / 131072.0 - ((double) calib->dig_t1) / 8192.0) *
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(((double) uncomp_temperature) / 131072.0 - ((double) calib->dig_t1) / 8192.0)) *
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((double) calib->dig_t3);
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*t_fine = (int32_t) (var1 + var2);
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*temperature = (var1 + var2) / 5120.0;
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}
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/**
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* @brief 获取气压
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* @param calib 系数的结构体
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* *pressure 气压值指针
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* *t_fine 精细分辨率温度值指针
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* @retval 无
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*/
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void bmp280_getPressure(bmp280_calib *calib,double *pressure,int32_t *t_fine)
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{
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uint8_t buf[3];
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uint32_t data_xlsb;
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uint32_t data_lsb;
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uint32_t data_msb;
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int32_t uncomp_pressure;
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double var1, var2;
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bmp280_readReg(BMP280_PRES,buf,3);
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data_msb = (uint32_t)buf[0] << 12;
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data_lsb = (uint32_t)buf[1] << 4;
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data_xlsb = (uint32_t)buf[2] >> 4;
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uncomp_pressure = (data_msb | data_lsb | data_xlsb);
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var1 = ((double) *t_fine / 2.0) - 64000.0;
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var2 = var1 * var1 * ((double) calib->dig_p6) / 32768.0;
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var2 = var2 + var1 * ((double) calib->dig_p5) * 2.0;
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var2 = (var2 / 4.0) + (((double) calib->dig_p4) * 65536.0);
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var1 = (((double)calib->dig_p3) * var1 * var1 / 524288.0 + ((double)calib->dig_p2) * var1) /
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524288.0;
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var1 = (1.0 + var1 / 32768.0) * ((double) calib->dig_p1);
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*pressure = 1048576.0 - (double)uncomp_pressure;
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*pressure = (*pressure - (var2 / 4096.0)) * 6250.0 / var1;
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var1 = ((double)calib->dig_p9) * *pressure * *pressure / 2147483648.0;
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var2 = *pressure * ((double)calib->dig_p8) / 32768.0;
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*pressure = *pressure + (var1 + var2 + ((double)calib->dig_p7)) / 16.0;
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}
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/**
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* @brief 初始化
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* @param *calib 系数的结构体指针
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* @retval 0 设置成功
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* 1 设置失败
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*/
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uint8_t bmp280_init(bmp280_calib *calib)
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{
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uint8_t rslt;
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rslt = bmp280_get_id();
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if(rslt == BMP2_CHIP_ID)
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{
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bmp280_getCalibration(calib);
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rslt = bmp280_setOversampling(5,2);
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if(rslt)
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{
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return 1;
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}
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rslt = bmp280_setConfig(0,4);
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if(rslt)
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{
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return 1;
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}
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rslt = bmp280_setMode(2);
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if(rslt)
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{
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return 1;
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}
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}
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else
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{
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return 1;
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}
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return 0;
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}
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/**
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* @brief 获取最终数据
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* @param *calib 系数的结构体指针
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* @retval 无
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*/
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void bmp280_getdata(bmp280_calib *calib,float *temperature,float *pressure)
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{
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double temp_T,temp_P;
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int32_t t_fine;
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bmp280_getTemperature(calib,&temp_T,&t_fine);
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bmp280_getPressure(calib,&temp_P,&t_fine);
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*temperature = (float)temp_T;
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*pressure = (float)temp_P;
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}
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49
User/device/bmp280_i2c.h
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49
User/device/bmp280_i2c.h
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@ -0,0 +1,49 @@
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#pragma once
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/*底层接口定义*/
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#include "bsp/i2c.h"
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#include "stdint.h"
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#define BMP280_I2C_ADDR 0x76 // BMP280 默认 I2C 地址
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/*寄存器地址*/
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#define BMP280_ID 0xD0 // 设备ID地址
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#define BMP280_RESET 0xE0 // 设备重启
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#define BMP280_STATUS 0xF3 // 设备状态
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#define BMP280_CTRL_MEAS 0xF4 // 数据采集和模式设置
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#define BMP280_CONFIG 0xF5 // 采样速率，滤波器和接口设置
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#define BMP280_DIGT 0x88 // 温度校准系数起始位置
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#define BMP280_DIGP 0x8E // 气压校准系数起始位置
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#define BMP280_TEMP 0xFA // 温度储存起始位置
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#define BMP280_PRES 0xF7 // 气压储存起始位置
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#define BMP2_CHIP_ID 0x58 // 设备ID地址
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#define bmp280_msblsb_to_u16(msb, lsb) (((uint16_t)msb << 8) | ((uint16_t)lsb))
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typedef struct {
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unsigned short dig_t1;
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signed short dig_t2;
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signed short dig_t3;
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unsigned short dig_p1;
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signed short dig_p2;
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signed short dig_p3;
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signed short dig_p4;
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signed short dig_p5;
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signed short dig_p6;
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signed short dig_p7;
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signed short dig_p8;
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signed short dig_p9;
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} bmp280_calib;
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uint8_t bmp280_get_id(void);
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uint8_t bmp280_reset(void);
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uint8_t bmp280_getStatus(void);
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uint8_t bmp280_setMode(uint8_t mode);
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uint8_t bmp280_setOversampling(uint8_t osrs_p, uint8_t osrs_t);
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uint8_t bmp280_setConfig(uint8_t Standbyt, uint8_t filter);
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void bmp280_getCalibration(bmp280_calib *calib);
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void bmp280_getTemperature(bmp280_calib *calib, double *temperature, int32_t *t_fine);
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void bmp280_getPressure(bmp280_calib *calib, double *pressure, int32_t *t_fine);
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uint8_t bmp280_init(bmp280_calib *calib);
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void bmp280_getdata(bmp280_calib *calib, float *temperature, float *pressure);
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