89 lines
3.2 KiB
Python
89 lines
3.2 KiB
Python
#!/usr/bin/env python
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#
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# GrovePi Example for using the Grove Thumb Joystick (http://www.seeedstudio.com/wiki/Grove_-_Thumb_Joystick)
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#
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# The GrovePi connects the Raspberry Pi and Grove sensors. You can learn more about GrovePi here: http://www.dexterindustries.com/GrovePi
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#
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# Have a question about this example? Ask on the forums here: http://forum.dexterindustries.com/c/grovepi
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#
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'''
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## License
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The MIT License (MIT)
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GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
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Copyright (C) 2017 Dexter Industries
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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'''
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import time
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import grovepi
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# Connect the Grove Thumb Joystick to analog port A0
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# GrovePi Port A0 uses Arduino pins 0 and 1
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# GrovePi Port A1 uses Arduino pins 1 and 2
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# Don't plug anything into port A1 that uses pin 1
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# Most Grove sensors only use 3 of their 4 pins, which is why the GrovePi shares Arduino pins between adjacent ports
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# If the sensor has a pin definition SIG,NC,VCC,GND, the second (white) pin is not connected to anything
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# If you wish to connect two joysticks, use ports A0 and A2 (skip A1)
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# Uses two pins - one for the X axis and one for the Y axis
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# This configuration means you are using port A0
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xPin = 0
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yPin = 1
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grovepi.pinMode(xPin,"INPUT")
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grovepi.pinMode(yPin,"INPUT")
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# The Grove Thumb Joystick is an analog device that outputs analog signal ranging from 0 to 1023
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# The X and Y axes are two ~10k potentiometers and a momentary push button which shorts the x axis
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# My joystick produces slightly different results to the specifications found on the url above
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# I've listed both here:
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# Specifications
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# Min Typ Max Click
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# X 206 516 798 1023
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# Y 203 507 797
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# My Joystick
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# Min Typ Max Click
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# X 253 513 766 1020-1023
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# Y 250 505 769
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while True:
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try:
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# Get X/Y coordinates
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x = grovepi.analogRead(xPin)
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y = grovepi.analogRead(yPin)
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# Calculate X/Y resistance
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Rx = (float)(1023 - x) * 10 / x
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Ry = (float)(1023 - y) * 10 / y
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# Was a click detected on the X axis?
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click = 1 if x >= 1020 else 0
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print("x =", x, " y =", y, " Rx =", Rx, " Ry =", Ry, " click =", click)
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time.sleep(.5)
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except IOError:
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print ("Error")
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