树莓派中python获取GY-85九轴模块信息示例

先看效果图

gy-85.py:

#!/usr/bin/python3
# -*- coding: utf-8 -*-
import curses
from time import *
from i2clibraries import i2c_itg3205, i2c_adxl345, i2c_hmc5883l

#==========================================================
#                       gy-85传感器监控
#==========================================================

def displayitg3205(screen, col, temp, x, y, z):
    """
    显示itg3205读数的方法
    """
    screen.addstr(1, col, "%.1f°℃    " % temp)
    screen.addstr(2, col, "%.1f°/s    " % x)
    screen.addstr(3, col, "%.1f°/s    " % y)
    screen.addstr(4, col, "%.1f°/s    " % z)

def displayadxl345(screen, col, x, y, z):
    """
    显示adxl345读数的方法
    """
    screen.addstr(1, col, "%.2fmg    " % x)
    screen.addstr(2, col, "%.2fmg    " % y)
    screen.addstr(3, col, "%.2fmg    " % z)

def displayhmc5883l(screen, col, heading, declination, x, y, z):
    """
    显示mc5883l读数的方法
    """
    screen.addstr(1, col, heading + "   ")
    screen.addstr(2, col, declination + "   ")
    screen.addstr(3, col, "%.2f   " % x)
    screen.addstr(4, col, "%.2f   " % y)
    screen.addstr(5, col, "%.2f   " % z)

try:
    myscreen = curses.initscr() #初始化curses
    myscreen.border(0)
    (screen_h, screen_w) = myscreen.getmaxyx() #获得屏幕高宽
    curses.start_color() #设置颜色
    curses.init_pair(1, curses.color_black, curses.color_green) #绿底黑字
    curses.init_pair(2, curses.color_red, curses.color_black) #白底蓝字
    curses.init_pair(3, curses.color_magenta,curses.color_black) #黑底什么字

    myscreen.clear() #清除画布

    # 计算每块的坐标, 屏幕分3列, 每列显示一个传感器
    col1 = screen_w / 3 * 0
    col2 = screen_w / 3 * 1
    col3 = screen_w / 3 * 2

    # 屏幕横向分三块,每块中间写上标题
    myscreen.addstr(0, int(col1 + screen_w / 3 / 2 - 3), "igt3205", curses.color_pair(1))
    myscreen.addstr(0, int(col2 + screen_w / 3 / 2 - 4), "adxl345", curses.color_pair(1))
    myscreen.addstr(0, int(col3 + screen_w / 3 / 2 - 4), "hmc5883l", curses.color_pair(1))

    #画分割线,把屏幕分为3列
    for col in range(1, screen_h):
        myscreen.addstr(col, int(col2), "│")
        myscreen.addstr(col, int(col3), "│")

    # 事先打印igt3205的各项值的名称
    myscreen.addstr(1, int(col1), "temp:", curses.color_pair(2))
    myscreen.addstr(2, int(col1), "x   :", curses.color_pair(2))
    myscreen.addstr(3, int(col1), "y   :", curses.color_pair(2))
    myscreen.addstr(4, int(col1), "z   :", curses.color_pair(2))

    # 事先打印adxl345的各项值的名称
    myscreen.addstr(1, int(col2) + 1, "x:", curses.color_pair(2))
    myscreen.addstr(2, int(col2) + 1, "y:", curses.color_pair(2))
    myscreen.addstr(3, int(col2) + 1, "z:", curses.color_pair(2))

    # 事先打印hmc5883l的各项值的名称
    myscreen.addstr(1, int(col3) + 1, "heading:    ", curses.color_pair(2))
    myscreen.addstr(2, int(col3) + 1, "declination:", curses.color_pair(2))
    myscreen.addstr(3, int(col3) + 1, "x:          ", curses.color_pair(2))
    myscreen.addstr(4, int(col3) + 1, "y:          ", curses.color_pair(2))
    myscreen.addstr(5, int(col3) + 1, "z:          ", curses.color_pair(2))

    # 初始化传感器
    itg3205 = i2c_itg3205.i2c_itg3205(0)

    adxl345 = i2c_adxl345.i2c_adxl345(0)

    hmc5883l = i2c_hmc5883l.i2c_hmc5883l(0)
    hmc5883l.setcontinuousmode() #设置为持续更新模式
    hmc5883l.setdeclination(9,54) #设置真北磁偏角补偿

    while true:
        #读取itg3205数据
        (itgready, dataready) = itg3205.getinterruptstatus()   
        if dataready:
            temp = itg3205.getdietemperature()
            (x, y, z) = itg3205.getdegpersecaxes()
            displayitg3205(myscreen, 6, temp, x, y, z) #刷新画布

        #读取adxl345数据
        (x, y, z) = adxl345.getaxes()
        displayadxl345(myscreen, int(col2) + 4, x, y, z) #刷新画布

        #读取hmc5883l数据
        (x, y, z) = hmc5883l.getaxes()
        heading = hmc5883l.getheadingstring() #获取指向角度
        declination = hmc5883l.getdeclinationstring() #获取磁偏角补偿信息
        displayhmc5883l(myscreen, int(col3) + 13, heading, declination, x, y, z) #刷新画布

        myscreen.refresh() #应用画布
        sleep(0.1) #暂停0.1秒

    myscreen.getch()

finally:
    curses.endwin()