建设银行大连分行网站,在线作图网,小区推广最有效的方式,广东省建设安全协会网站STM32配置读取BMP280气压传感器数据
BMP280是在BMP180基础上增强的绝对气压传感器#xff0c;在飞控领域的高度识别方面应用也比较多。 BMP280和BMP180的区别#xff1a;
市面上也有一些模块#xff1a; 这里介绍STM32芯片和BMP280的连接和数据读取。
电路连接
BMP28…STM32配置读取BMP280气压传感器数据
BMP280是在BMP180基础上增强的绝对气压传感器在飞控领域的高度识别方面应用也比较多。 BMP280和BMP180的区别
市面上也有一些模块 这里介绍STM32芯片和BMP280的连接和数据读取。
电路连接
BMP280和STM32的供电范围一致可以在1.8V 2.5V和3.3V多个供电电压点直接连接。
BMP280和STM32可以通过SPI或者I2C总线实现访问连接I2C接口连接管脚少这里采用I2C接口实现连接。
这里采用GPIO模拟I2C协议的方式所以随意找2个管脚作为SCL和SDA。 用I2C总线连接时BMP280的SDO管脚的电平状态用作I2C地址低位的选择。
运行过程
运行过程包括测试参数的配置选择 也包括循环运行过程的节奏控制 这里以STM32F401CCU6和STM32CUBEIDE开发环境为例实现BMP280的访问读取数据采用USB虚拟串口或普通串口方式打印输出。
初始化主要配置的寄存器0xF4 ctrl_meas的定义如下 过采样率oversampling会对采样分辨率和噪声产生影响 不同场景有推荐配置
初始化主要配置的寄存器0xF5 config的定义如下 测量时间和上面的测量间隔就构成了数据输出率 滤波参数和推荐 按照数据手册表达方式应该是 STM32工程配置
首先建立基本工程并配置时钟系统
配置USB虚拟串口 配置USART1作为通讯串口 配置两个管脚作为与BMP280的通讯管脚
保存并生成初始工程代码
STM32工程代码
I2C模拟时序用到的微秒延时函数参考 STM32 HAL us delay微秒延时的指令延时实现方式及优化 USB虚拟串口的实现参考 STM32 USB VCOM和HID的区别配置及Echo功能实现HAL STM32串口打印的实现参考 STM32 UART串口printf函数应用及浮点打印代码空间节省 (HAL) 采用减少代码编译size的方式参考 STM32 region FLASH‘ overflowed by xxx bytes 问题解决
代码逻辑识别USB虚拟串口是否连接如果连接则通过USB虚拟串口打印输出否则通过普通串口打印输出。 上电或重启后STM32对BMP280进行初始化如果失败则打印输出报错信息如果成功则循环进行检测和输出压力高度和温度值。
建立BMP280.h放置一些寄存器访问地址参数
#ifndef __BMP280_H
#define __BMP280_H#include main.h
#include math.h
#include string.h
#include stdio.h
/** BMP280 register address*/
#define BMP280_REGISTER_DIG_T1 0x88
#define BMP280_REGISTER_DIG_T2 0x8A
#define BMP280_REGISTER_DIG_T3 0x8C#define BMP280_REGISTER_DIG_P1 0x8E
#define BMP280_REGISTER_DIG_P2 0x90
#define BMP280_REGISTER_DIG_P3 0x92
#define BMP280_REGISTER_DIG_P4 0x94
#define BMP280_REGISTER_DIG_P5 0x96
#define BMP280_REGISTER_DIG_P6 0x98
#define BMP280_REGISTER_DIG_P7 0x9A
#define BMP280_REGISTER_DIG_P8 0x9C
#define BMP280_REGISTER_DIG_P9 0x9E#define BMP280_REGISTER_CHIPID 0xD0
#define BMP280_REGISTER_VERSION 0xD1
#define BMP280_REGISTER_SOFTRESET 0xE0
#define BMP280_REGISTER_STATUS 0xF3
#define BMP280_REGISTER_CONTROL 0xF4
#define BMP280_REGISTER_CONFIG 0xF5#define BMP280_TEMP_XLSB_REG 0xFC /*Temperature XLSB Register */
#define BMP280_TEMP_LSB_REG 0xFB /*Temperature LSB Register */
#define BMP280_TEMP_MSB_REG 0xFA /*Temperature LSB Register */
#define BMP280_PRESS_XLSB_REG 0xF9 /*Pressure XLSB Register */
#define BMP280_PRESS_LSB_REG 0xF8 /*Pressure LSB Register */
#define BMP280_PRESS_MSB_REG 0xF7 /*Pressure MSB Register *//*calibration parameters */
#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 0x9Ftypedef struct {uint16_t T1; /*calibration T1 data*/int16_t T2; /*calibration T2 data*/int16_t T3; /*calibration T3 data*/uint16_t P1; /*calibration P1 data*/int16_t P2; /*calibration P2 data*/int16_t P3; /*calibration P3 data*/int16_t P4; /*calibration P4 data*/int16_t P5; /*calibration P5 data*/int16_t P6; /*calibration P6 data*/int16_t P7; /*calibration P7 data*/int16_t P8; /*calibration P8 data*/int16_t P9; /*calibration P9 data*/int32_t T_fine; /*calibration t_fine data*/
} BMP280_HandleTypeDef;typedef struct
{uint8_t Index;int32_t AvgBuffer[8];
} BMP280_AvgTypeDef;#define MSLP 101325 // Mean Sea Level Pressure 1013.25 hPA (1hPa 100Pa 1mbar)
#define ALTITUDE_OFFSET 10000void I2C_Init(void);
void BMP280_Init();
void BMP280_CalTemperatureAndPressureAndAltitude(int32_t *temperature, int32_t *pressure, int32_t *Altitude);#endif /* __BMP280_H */其中ALTITUDE_OFFSET用于设定用户高度偏差。
建立BMP280.c实现访问和计算函数 #include BMP280.hextern void PY_Delay_us_t(uint32_t Delay);
extern char console[128];//BMP280 I2C access protocol
#define us_num 2#define SCL_OUT_H HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_SET)
#define SCL_OUT_L HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_RESET)
#define SDA_OUT_H HAL_GPIO_WritePin(GPIOB, GPIO_PIN_13, GPIO_PIN_SET)
#define SDA_OUT_L HAL_GPIO_WritePin(GPIOB, GPIO_PIN_13, GPIO_PIN_RESET)
#define SDA_IN HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_13)void I2C_Init(void)
{SCL_OUT_H;SDA_OUT_H;PY_Delay_us_t(100000);}void I2C_Start(void)
{PY_Delay_us_t(us_num) ;SDA_OUT_H;SCL_OUT_H;PY_Delay_us_t(us_num/2) ;SDA_OUT_L;PY_Delay_us_t(us_num/2) ;SCL_OUT_L;
}void I2C_Stop(void)
{SCL_OUT_L;PY_Delay_us_t(us_num) ;SDA_OUT_L;PY_Delay_us_t(us_num) ;SCL_OUT_H;PY_Delay_us_t(us_num) ;SDA_OUT_H;PY_Delay_us_t(us_num) ;
}void I2C_Write_Ack(void)
{PY_Delay_us_t(us_num/2) ;SDA_OUT_L;PY_Delay_us_t(us_num/2) ;SCL_OUT_H;PY_Delay_us_t(us_num) ;SCL_OUT_L;SDA_OUT_H;}uint8_t I2C_Read_Ack(void)
{uint8_t status0;SCL_OUT_L;PY_Delay_us_t(us_num/2) ;SDA_OUT_H;PY_Delay_us_t(us_num/2) ;status SDA_IN;SCL_OUT_H;PY_Delay_us_t(us_num) ;SCL_OUT_L;SDA_OUT_L;return status;}void I2C_Send_Byte(uint8_t txd){for(uint8_t i0;i8;i){PY_Delay_us_t(us_num/2) ;if((txd0x80)7) SDA_OUT_H;else SDA_OUT_L;txd1;PY_Delay_us_t(us_num/2) ;SCL_OUT_H;PY_Delay_us_t(us_num) ;SCL_OUT_L;}SDA_OUT_L;
}uint8_t I2C_Read_Byte(unsigned char rdack)
{uint8_t rxd0;for(uint8_t i0;i8;i ){SCL_OUT_L;PY_Delay_us_t(us_num/2) ;SDA_OUT_H;PY_Delay_us_t(us_num/2) ;SCL_OUT_H;rxd1;if(SDA_IN) rxd;PY_Delay_us_t(us_num) ;}SCL_OUT_L;SDA_OUT_H;if (rdack) I2C_Write_Ack();return rxd;
}#define BMP280_I2C_ADDR_SEL 1BMP280_HandleTypeDef bmp280;
#define dig_T1 bmp280.T1
#define dig_T2 bmp280.T2
#define dig_T3 bmp280.T3
#define dig_P1 bmp280.P1
#define dig_P2 bmp280.P2
#define dig_P3 bmp280.P3
#define dig_P4 bmp280.P4
#define dig_P5 bmp280.P5
#define dig_P6 bmp280.P6
#define dig_P7 bmp280.P7
#define dig_P8 bmp280.P8
#define dig_P9 bmp280.P9
#define t_fine bmp280.T_fineint32_t gs32Pressure0 MSLP;void BMP280_WriteReg(uint8_t WrAddr, uint8_t data)
{uint8_t daddr; //device address (0x1e1)if(BMP280_I2C_ADDR_SEL0) daddr 0xec; //device address for SDO low status (0x761)else daddr 0xee; //device address for SDO high status (0x771)I2C_Start();I2C_Send_Byte(daddr);I2C_Read_Ack();I2C_Send_Byte(WrAddr);I2C_Read_Ack();I2C_Send_Byte(data);I2C_Read_Ack();I2C_Stop();}uint8_t BMP280_ReadReg(uint8_t RdAddr)
{uint8_t RegValue 0;uint8_t daddr;if(BMP280_I2C_ADDR_SEL0) daddr 0xec; //device address for SDO low status (0x761)else daddr 0xee; //device address for SDO high status (0x771)I2C_Start();I2C_Send_Byte(daddr);I2C_Read_Ack();I2C_Send_Byte(RdAddr);I2C_Read_Ack();I2C_Start();I2C_Send_Byte(daddr1);I2C_Read_Ack();RegValueI2C_Read_Byte(0);I2C_Stop();return RegValue;
}/* Returns temperature in DegC, double precision. Output value of 1.23equals 51.23 DegC. */
double BMP280_Compensate_Temperature(int32_t adc_T)
{double var1, var2, temperature;var1 (((double) adc_T) / 16384.0 - ((double) dig_T1) / 1024.0) * ((double) dig_T2);var2 ((((double) adc_T) / 131072.0 - ((double) dig_T1) / 8192.0) * (((double) adc_T) / 131072.0- ((double) dig_T1) / 8192.0)) * ((double) dig_T3);t_fine (int32_t) (var1 var2);temperature (var1 var2) / 5120.0;return temperature;
}/* Returns pressure in Pa as double. Output value of 6386.2equals 96386.2 Pa 963.862 hPa */
double BMP280_Compensate_Pressure(int32_t adc_P)
{double var1, var2, pressure;var1 ((double)t_fine / 2.0) - 64000.0;var2 var1 * var1 * ((double) dig_P6) / 32768.0;var2 var2 var1 * ((double) dig_P5) * 2.0;var2 (var2 / 4.0) (((double) dig_P4) * 65536.0);var1 (((double) dig_P3) * var1 * var1 / 524288.0 ((double) dig_P2) * var1) / 524288.0;var1 (1.0 var1 / 32768.0) * ((double) dig_P1);if (var1 0.0) {return 0; // avoid exception caused by division by zero}pressure 1048576.0 - (double) adc_P;pressure (pressure - (var2 / 4096.0)) * 6250.0 / var1;var1 ((double) dig_P9) * pressure * pressure / 2147483648.0;var2 pressure * ((double) dig_P8) / 32768.0;pressure pressure (var1 var2 ((double) dig_P7)) / 16.0;return pressure;
}double BMP280_Get_Pressure(void)
{uint8_t lsb, msb, xlsb;int32_t adc_P;xlsb BMP280_ReadReg(BMP280_PRESS_XLSB_REG);lsb BMP280_ReadReg(BMP280_PRESS_LSB_REG);msb BMP280_ReadReg(BMP280_PRESS_MSB_REG);adc_P (msb 12) | (lsb 4) | (xlsb 4);//adc_P 51988;return BMP280_Compensate_Pressure(adc_P);
}void BMP280_Get_Temperature_And_Pressure(double *temperature, double *pressure)
{uint8_t lsb, msb, xlsb;int32_t adc_P,adc_T;xlsb BMP280_ReadReg(BMP280_TEMP_XLSB_REG);lsb BMP280_ReadReg(BMP280_TEMP_LSB_REG);msb BMP280_ReadReg(BMP280_TEMP_MSB_REG);adc_T (msb 12) | (lsb 4) | (xlsb 4);//adc_T 415148;* temperature BMP280_Compensate_Temperature(adc_T);xlsb BMP280_ReadReg(BMP280_PRESS_XLSB_REG);lsb BMP280_ReadReg(BMP280_PRESS_LSB_REG);msb BMP280_ReadReg(BMP280_PRESS_MSB_REG);adc_P (msb 12) | (lsb 4) | (xlsb 4);//adc_P 51988;* pressure BMP280_Compensate_Pressure(adc_P);
}#define BMP280_AVG_TIMES 8 //maximum: 8
void BMP280_CalAvgValue(uint8_t *pIndex, int32_t *pAvgBuffer, int32_t InVal, int32_t *pOutVal)
{uint8_t i;static uint8_t status 0;*(pAvgBuffer ((*pIndex) )) InVal;*pIndex % BMP280_AVG_TIMES;if(status24) //skip average computation before getting pre-defined data times (24 times){*pOutVal InVal;status;}else //compute average value{*pOutVal 0;for(i 0; i BMP280_AVG_TIMES; i ){*pOutVal *(pAvgBuffer i);}*pOutVal / BMP280_AVG_TIMES;}
}void BMP280_CalculateAbsoluteAltitude(int32_t *pAltitude, int32_t PressureVal)
{*pAltitude 4433000 * (1 - pow((PressureVal / (float)gs32Pressure0), 0.1903));
}void BMP280_CalTemperatureAndPressureAndAltitude(int32_t *temperature, int32_t *pressure, int32_t *Altitude)
{double CurPressure, CurTemperature;int32_t CurAltitude;static BMP280_AvgTypeDef BMP280_Filter[3];BMP280_Get_Temperature_And_Pressure(CurTemperature, CurPressure);BMP280_CalAvgValue(BMP280_Filter[0].Index, BMP280_Filter[0].AvgBuffer, (int32_t)(CurPressure), pressure);BMP280_CalculateAbsoluteAltitude(CurAltitude, (*pressure));BMP280_CalAvgValue(BMP280_Filter[1].Index, BMP280_Filter[1].AvgBuffer, CurAltitude, Altitude);BMP280_CalAvgValue(BMP280_Filter[2].Index, BMP280_Filter[2].AvgBuffer, (int32_t)CurTemperature*10, temperature);(*Altitude) ALTITUDE_OFFSET;return;
}void BMP280_Read_Calibration(void)
{uint8_t lsb, msb;/* read the temperature calibration parameters */lsb BMP280_ReadReg(BMP280_DIG_T1_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_T1_MSB_REG);dig_T1 msb 8 | lsb;lsb BMP280_ReadReg(BMP280_DIG_T2_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_T2_MSB_REG);dig_T2 msb 8 | lsb;lsb BMP280_ReadReg(BMP280_DIG_T3_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_T3_MSB_REG);dig_T3 msb 8 | lsb;/* read the pressure calibration parameters */lsb BMP280_ReadReg(BMP280_DIG_P1_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_P1_MSB_REG);dig_P1 msb 8 | lsb;lsb BMP280_ReadReg(BMP280_DIG_P2_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_P2_MSB_REG);dig_P2 msb 8 | lsb;lsb BMP280_ReadReg(BMP280_DIG_P3_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_P3_MSB_REG);dig_P3 msb 8 | lsb;lsb BMP280_ReadReg(BMP280_DIG_P4_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_P4_MSB_REG);dig_P4 msb 8 | lsb;lsb BMP280_ReadReg(BMP280_DIG_P5_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_P5_MSB_REG);dig_P5 msb 8 | lsb;lsb BMP280_ReadReg(BMP280_DIG_P6_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_P6_MSB_REG);dig_P6 msb 8 | lsb;lsb BMP280_ReadReg(BMP280_DIG_P7_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_P7_MSB_REG);dig_P7 msb 8 | lsb;lsb BMP280_ReadReg(BMP280_DIG_P8_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_P8_MSB_REG);dig_P8 msb 8 | lsb;lsb BMP280_ReadReg(BMP280_DIG_P9_LSB_REG);msb BMP280_ReadReg(BMP280_DIG_P9_MSB_REG);dig_P9 msb 8 | lsb;}void BMP280_Init()
{uint8_t u8ChipID, u8CtrlMod, u8Status;u8ChipID BMP280_ReadReg(BMP280_REGISTER_CHIPID);u8CtrlMod BMP280_ReadReg(BMP280_REGISTER_CONTROL);u8Status BMP280_ReadReg(BMP280_REGISTER_STATUS);if(u8ChipID 0x58){if(USB_CONN_STATUS()){sprintf(console, \r\nBMP280 initial successful : ChipID [0x%x] CtrlMod [0x%x] Status [0x%x] \r\n, u8ChipID,u8CtrlMod,u8Status);CDC_Transmit_FS((uint8_t*)console, strlen(console));}else{printf(\r\nBMP280 initial successful : ChipID [0x%x] CtrlMod [0x%x] Status [0x%x] \r\n, u8ChipID,u8CtrlMod,u8Status);}BMP280_WriteReg(BMP280_REGISTER_CONTROL, 0xFF); //ctrl_meas registerBMP280_WriteReg(BMP280_REGISTER_CONFIG, 0x0C); //config registerBMP280_Read_Calibration();}else{if(USB_CONN_STATUS()){sprintf(console, \r\nBMP280 initial failure : ChipID [0x%x] CtrlMod [0x%x] Status [0x%x] \r\n, u8ChipID,u8CtrlMod,u8Status);CDC_Transmit_FS((uint8_t*)console, strlen(console));}else{printf(\r\nBMP280 initial failure : ChipID [0x%x] CtrlMod [0x%x] Status [0x%x] \r\n, u8ChipID,u8CtrlMod,u8Status);}return BMP280_Init();}}
main.c文件的实现功能测试代码注意这里把BMP280管脚SDO拉到了高电平所以定义为#define BMP280_I2C_ADDR_SEL 1
/* USER CODE BEGIN Header */
/********************************************************************************* file : main.c* brief : Main program body******************************************************************************* attention** Copyright (c) 2023 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include main.h
#include usb_device.h/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include BMP280.h
#include usart.h/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
__IO float usDelayBase;
void PY_usDelayTest(void)
{__IO uint32_t firstms, secondms;__IO uint32_t counter 0;firstms HAL_GetTick()1;secondms firstms1;while(uwTick!firstms) ;while(uwTick!secondms) counter;usDelayBase ((float)counter)/1000;
}void PY_Delay_us_t(uint32_t Delay)
{__IO uint32_t delayReg;__IO uint32_t usNum (uint32_t)(Delay*usDelayBase);delayReg 0;while(delayReg!usNum) delayReg;
}void PY_usDelayOptimize(void)
{__IO uint32_t firstms, secondms;__IO float coe 1.0;firstms HAL_GetTick();PY_Delay_us_t(1000000) ;secondms HAL_GetTick();coe ((float)1000)/(secondms-firstms);usDelayBase coe*usDelayBase;
}void PY_Delay_us(uint32_t Delay)
{__IO uint32_t delayReg;__IO uint32_t msNum Delay/1000;__IO uint32_t usNum (uint32_t)((Delay%1000)*usDelayBase);if(msNum0) HAL_Delay(msNum);delayReg 0;while(delayReg!usNum) delayReg;
}
/* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD *//* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart1;/* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
int32_t PressureVal 0, TemperatureVal 0, AltitudeVal 0;
char mychar[100];
char console[128];
/*
*Convert float to string type
*Written by Pegasus Yu in 2022
*stra: string address as mychar from char mychar[];
*float: float input like 12.345
*flen: fraction length as 3 for 12.345
*/
#include stdio.h
#include string.h
#include stdlib.h
#include math.h
void py_f2s4printf(char * stra, float x, uint8_t flen)
{uint32_t base;int64_t dn;char mc[32];base pow(10,flen);dn x*base;sprintf(stra, %d., (int)(dn/base));dn abs(dn);if(dn%base0){for(uint8_t j1;jflen;j){stra strcat(stra, 0);}return;}else{if(flen1){sprintf(mc, %d, (int)(dn%base));stra strcat(stra, mc);return;}for(uint8_t j1;jflen;j){if((dn%base)pow(10,j)){for(uint8_t k1;k(flen-j);k){stra strcat(stra, 0);}sprintf(mc, %d, (int)(dn%base));stra strcat(stra, mc);return;}}sprintf(mc, %d, (int)(dn%base));stra strcat(stra, mc);return;}
}
/* USER CODE END 0 *//*** brief The application entry point.* retval int*/
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 *//* 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_USB_DEVICE_Init();MX_USART1_UART_Init();/* USER CODE BEGIN 2 */PY_usDelayTest();PY_usDelayOptimize();I2C_Init();BMP280_Init();PY_Delay_us_t(100000); //Waiting for the stability of BMP280 after initiation/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){BMP280_CalTemperatureAndPressureAndAltitude(TemperatureVal, PressureVal, AltitudeVal);if(USB_CONN_STATUS()){sprintf(console, \r\n\r\n--------------BMP280 TEST---------------);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) USBD_BUSY ) PY_Delay_us_t(1);py_f2s4printf(mychar, (float)PressureVal/100, 2);sprintf(console, \r\n Pressure: %s\r\n, mychar);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) USBD_BUSY ) PY_Delay_us_t(1);py_f2s4printf(mychar, (float)AltitudeVal/100, 2);sprintf(console, \r\n Altitude: %s\r\n, mychar);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) USBD_BUSY ) PY_Delay_us_t(1);py_f2s4printf(mychar, (float)TemperatureVal/10, 1);sprintf(console, \r\n Temperature: %s\r\n, mychar);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) USBD_BUSY ) PY_Delay_us_t(1);}else{printf(\r\n\r\n-----------------------------------------------);py_f2s4printf(mychar, (float)PressureVal/100, 2);printf(\r\n Pressure: %s\r\n, mychar);py_f2s4printf(mychar, (float)AltitudeVal/100, 2);sprintf(console, \r\n Altitude: %s\r\n, mychar);printf(\r\n Altitude: %s\r\n, mychar);py_f2s4printf(mychar, (float)TemperatureVal/10, 1);sprintf(console, \r\n Temperature: %s\r\n, mychar);}PY_Delay_us_t(200000);/* USER CODE END WHILE *//* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}/*** brief System Clock Configuration* retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct {0};RCC_ClkInitTypeDef RCC_ClkInitStruct {0};/** Configure the main internal regulator output voltage*/__HAL_RCC_PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);/** Initializes the RCC Oscillators according to the specified parameters* in the RCC_OscInitTypeDef structure.*/RCC_OscInitStruct.OscillatorType RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState RCC_HSE_ON;RCC_OscInitStruct.PLL.PLLState RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM 25;RCC_OscInitStruct.PLL.PLLN 336;RCC_OscInitStruct.PLL.PLLP RCC_PLLP_DIV4;RCC_OscInitStruct.PLL.PLLQ 7;if (HAL_RCC_OscConfig(RCC_OscInitStruct) ! HAL_OK){Error_Handler();}/** Initializes the CPU, AHB and APB buses clocks*/RCC_ClkInitStruct.ClockType RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;RCC_ClkInitStruct.SYSCLKSource RCC_SYSCLKSOURCE_PLLCLK;RCC_ClkInitStruct.AHBCLKDivider RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider RCC_HCLK_DIV2;RCC_ClkInitStruct.APB2CLKDivider RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(RCC_ClkInitStruct, FLASH_LATENCY_2) ! HAL_OK){Error_Handler();}
}/*** brief USART1 Initialization Function* param None* retval None*/
static void MX_USART1_UART_Init(void)
{/* USER CODE BEGIN USART1_Init 0 *//* USER CODE END USART1_Init 0 *//* USER CODE BEGIN USART1_Init 1 *//* USER CODE END USART1_Init 1 */huart1.Instance USART1;huart1.Init.BaudRate 115200;huart1.Init.WordLength UART_WORDLENGTH_8B;huart1.Init.StopBits UART_STOPBITS_1;huart1.Init.Parity UART_PARITY_NONE;huart1.Init.Mode UART_MODE_TX_RX;huart1.Init.HwFlowCtl UART_HWCONTROL_NONE;huart1.Init.OverSampling UART_OVERSAMPLING_16;if (HAL_UART_Init(huart1) ! HAL_OK){Error_Handler();}/* USER CODE BEGIN USART1_Init 2 *//* USER CODE END USART1_Init 2 */}/*** brief GPIO Initialization Function* param None* retval None*/
static void MX_GPIO_Init(void)
{GPIO_InitTypeDef GPIO_InitStruct {0};/* GPIO Ports Clock Enable */__HAL_RCC_GPIOH_CLK_ENABLE();__HAL_RCC_GPIOB_CLK_ENABLE();__HAL_RCC_GPIOA_CLK_ENABLE();/*Configure GPIO pin Output Level */HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12|GPIO_PIN_13, GPIO_PIN_SET);/*Configure GPIO pins : PB12 PB13 */GPIO_InitStruct.Pin GPIO_PIN_12|GPIO_PIN_13;GPIO_InitStruct.Mode GPIO_MODE_OUTPUT_OD;GPIO_InitStruct.Pull GPIO_PULLUP;GPIO_InitStruct.Speed GPIO_SPEED_FREQ_VERY_HIGH;HAL_GPIO_Init(GPIOB, GPIO_InitStruct);}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//*** brief This function is executed in case of error occurrence.* retval None*/
void Error_Handler(void)
{/* USER CODE BEGIN Error_Handler_Debug *//* User can add his own implementation to report the HAL error return state */__disable_irq();while (1){}/* USER CODE END Error_Handler_Debug */
}#ifdef USE_FULL_ASSERT
/*** brief Reports the name of the source file and the source line number* where the assert_param error has occurred.* param file: pointer to the source file name* param line: assert_param error line source number* retval None*/
void assert_failed(uint8_t *file, uint32_t line)
{/* USER CODE BEGIN 6 *//* User can add his own implementation to report the file name and line number,ex: printf(Wrong parameters value: file %s on line %d\r\n, file, line) *//* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
注意芯片内部已经配置选用了滤波功能采用滤波功能后的输出速率不高对于外部进行静态高度测量可以再进行取多次平均的算法如果是运动过程高度测量则不必再采用平均算法。另外可以给
测试输出
代码运行的测试输出
工程代码下载
STM32F401CCU6配置读取BMP280工程下载
–End–
