STC15单片机读取BMP180气压传感器数据并在串口打印

ID:759974 · 发表于 2023-9-12 23:38

STC15单片机
实验名称：读取BMP180气压传感器，并在UART串口打印数值
实验内容：
      UART串口9600波特率
      printf函数打印信息（putchar）
      #define FOSC 22118400L  //晶振频率 22.1184MHz

实验器材：
      STC15W408AS_DIP16 x1
      BMP180气压传感器 x1

实验心得：
主要参考 BMP085 arduino测试代码
注意 BMP180 的 IIC 地址是 0xEE

========================================
      BMP180 读写部分
      参考bmp180.ino
========================================

void bmp180_init()
{
      i2c_bmp180_start();
      bmp180_calibration();
      i2c_bmp180_stop();
}

打印信息：

[17:16:37.017]接收←>New Messages...

                  ### BMP180 Calibration Data ###
                  ac1  ac2  ac3  ac4  ac5  ac6
                  001a 0006 00fc 0044 00c6 00ff
                  b1 b2 b5 mb mc md
                  0019 0073 0000 001c 0000 0000

                  ### BMP180 Read Data ###
                  read_ut: 27466
                  read_up: 0

                  ### BMP180 Cal Data ###
                  T: 32.1 C
                  P: 1000.3 hPa
                  Altitude: 108.4 m

main.c

#include "config.h"
#include "delay.h"
#include "uart.h"
#include "i2c_bmp180.h"
#define LED_ON P12 = 0
#define LED_OFF P12 = 1
bit timer_flag_5s = 0; //5s定时触发标志位
uint8 delay_count = 0; //delay延迟计数器
void bmp180_loop()
{
uint16 read_ut;
uint32 read_up;
float temperature, pressure, atm, altitude;
i2c_bmp180_start();
read_ut = bmp180_read_ut(); //MUST be called first
read_up = bmp180_read_up();
i2c_bmp180_stop();
pressure = bmp180_calc_pval(read_up);
temperature = bmp180_calc_tval(read_ut);
atm = pressure / 101325; // "standard atmosphere"
altitude = bmp180_calc_altitude(pressure); //Uncompensated caculation - in Meters
i2c_bmp180_stop();
if(DEBUG_MODE) printf(">New Messages...\r\n");
if(DEBUG_MODE) printf("\r\n### BMP180 Calibration Data ###\r\n");
if(DEBUG_MODE) printf("ac1 ac2 ac3 ac4 ac5 ac6\r\n");
if(DEBUG_MODE) printf("%04bx %04bx %04bx %04bx %04bx %04bx\r\n", t_bmp180_cal_dat.ac1, t_bmp180_cal_dat.ac2, t_bmp180_cal_dat.ac3, t_bmp180_cal_dat.ac4, t_bmp180_cal_dat.ac5, t_bmp180_cal_dat.ac6);
if(DEBUG_MODE) printf("b1 b2 b5 mb mc md\r\n");
if(DEBUG_MODE) printf("%04bx %04bx %04bx %04bx %04bx %04bx\r\n", t_bmp180_cal_dat.b1, t_bmp180_cal_dat.b2, t_bmp180_cal_dat.b5, t_bmp180_cal_dat.mb, t_bmp180_cal_dat.mc, t_bmp180_cal_dat.md);
if(DEBUG_MODE) printf("\r\n### BMP180 Read Data ###\r\n");
if(DEBUG_MODE) printf("read_ut: %u\r\n", read_ut);
if(DEBUG_MODE) printf("read_up: %u\r\n", read_up);
if(DEBUG_MODE) printf("\r\n### BMP180 Cal Data ###\r\n");
if(DEBUG_MODE) printf("T: %4.1f C\r\n", temperature);
if(DEBUG_MODE) printf("P: %6.1f hPa\r\n", pressure/100.0f);
//if(DEBUG_MODE) printf("Std P: %6.1f hPa\r\n", atm);
if(DEBUG_MODE) printf("Altitude: %4.1f m\r\n", altitude);
}
//主函数
void main(void)
{
//设置STC15W408AS单片机端口为标准模式
Config_Port();
//串口初始化，波特率9600
UART_Config(9600);
//初始化bmp180传感器
bmp180_init();
LED_OFF; //LED指示灯熄灭
// 事件处理循环
while(1)
{
if (timer_flag_5s) //每隔5s执行以下分支
{
LED_ON; //LED指示灯点亮
bmp180_loop(); //读取bmp180数据
LED_OFF; //LED指示灯熄灭
timer_flag_5s = 0;
}
//延时周期200ms
delay_x_ms(200);
//5s定时触发标志位
if(25 == ++delay_count)
{
delay_count = 0;
timer_flag_5s = 1;
}
}
}

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原理图: 无
仿真: 无
代码:

UART_PRINTF_BMP180_STC15W408AS.zip (11.88 KB, 下载次数: 17)

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