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en:c1_tinkering [2015/04/30 16:09] codewalker |
en:c1_tinkering [2016/02/29 14:25] john1117 removed |
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| //------------------------------------------------------------------------------------------------------------ | //------------------------------------------------------------------------------------------------------------ | ||
| //------------------------------------------------------------------------------------------------------------ | //------------------------------------------------------------------------------------------------------------ | ||
| + | </file> | ||
| + | |||
| + | == Python example == | ||
| + | * [[https://github.com/hardkernel/WiringPi2-Python|WiringPi2-Python repository for ODROID]] | ||
| + | **Prerequisites**: You must have //python-dev// and //python-setuptools// installed If you manually rebuild the bindings with swig-python wiringpi.i | ||
| + | |||
| + | 1. Get/setup WiringPi 2 for Python repository | ||
| + | <code> | ||
| + | # git clone https://github.com/hardkernel/WiringPi2-Python.git | ||
| + | # cd WiringPi2-Python | ||
| + | # git submodule init | ||
| + | # git submodule update | ||
| + | </code> | ||
| + | |||
| + | 2. Build & install | ||
| + | <code> | ||
| + | # sudo python setup.py install | ||
| + | </code> | ||
| + | |||
| + | 3. Run the example source code | ||
| + | <file python example-led.py> | ||
| + | #!/usr/bin/python | ||
| + | import wiringpi2 as wpi | ||
| + | import time | ||
| + | |||
| + | leds = [24, 23, 22, 21, 14, 13, 12, 3, 2, 0, 7, 1, 4, 5, 6, 10, 26, 11, 27] | ||
| + | |||
| + | wpi.wiringPiSetup() | ||
| + | |||
| + | # GPOI pin setup | ||
| + | for x in leds: | ||
| + | wpi.pinMode(x, 1) | ||
| + | wpi.digitalWrite(x, 0) | ||
| + | |||
| + | adc_unit = 4095 / len(leds) | ||
| + | while True: | ||
| + | time.sleep(0.05) | ||
| + | |||
| + | # Read the adc value | ||
| + | adcValue = wpi.analogRead(0) | ||
| + | |||
| + | # Set the LEDs | ||
| + | ledPos = (adcValue * len(leds) * 1000) / 1024 | ||
| + | ledPos = len(leds) - (ledPos / 1000) | ||
| + | |||
| + | for x in leds: | ||
| + | wpi.digitalWrite(x, 0) | ||
| + | |||
| + | for x in xrange(ledPos): | ||
| + | wpi.digitalWrite(leds[x], 1) | ||
| </file> | </file> | ||
| Line 411: | Line 461: | ||
| </code> | </code> | ||
| - | wiringPi의 "/dev/mem"을 open 하여 mmap을 사용하는 방식으로 만들려고 하였으니 "/dev/mem"은 root가 아니면 접근을 제한하도록 되어 있어서 불가능합니다. | + | Korean: wiringPi의 "/dev/mem"을 open 하여 mmap을 사용하는 방식으로 만들려고 하였으니 "/dev/mem"은 root가 아니면 접근을 제한하도록 되어 있어서 불가능합니다. |
| jni의 library에는 root 권한을 줄 방법이 없습니다. | jni의 library에는 root 권한을 줄 방법이 없습니다. | ||
| - | + | English: It was impossible to access the /dev/mem in the Android platform because only root can access it. | |
| + | There is no way to add a root permission to the JNI library. | ||
