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GPIO
#install python libs
sudo apt-get install python-dev
#Download gpio libs from
https://pypi.python.org/pypi/RPi.GPIO
and place in ~/gpio/
#unpack and install
cd ~/gpio/
tar xzvf RPi.GPIO0.5.2a.tar.gz
cd RPi.GPIO0.5.2a.tar.gz
sudo python setup.py install
OR
sudo apt-get install python-rpi.gpio (personally untested)
GPIO EXAMPLE SOFTWARE
flash_leds.py
from time import sleep
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(False)
GPIO.setup(13, GPIO.OUT)
GPIO.setup(15, GPIO.OUT)
GPIO.setup(16, GPIO.OUT)
while 1:
GPIO.output(13, False)
print("green on")
sleep(1)
GPIO.output(13, True)
print("green off")
sleep(1)
GPIO.output(15, False)
print("yellow on")
sleep(1)
GPIO.output(15, True)
print("yellow off")
sleep(1)
GPIO.output(16, False)
print("red on")
sleep(1)
GPIO.output(16, True)
print("red off")
sleep(1)
button_leds.py
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(False)
GPIO.setup(13, GPIO.OUT)
GPIO.setup(11, GPIO.IN)
GPIO.setup(15, GPIO.OUT)
GPIO.setup(12, GPIO.IN)
while 1:
if GPIO.input(11):
GPIO.output(13, False)
print("red on")
else:
GPIO.output(13, True)
print("red off")
if GPIO.input(12):
GPIO.output(15, False)
print("green on")
else:
GPIO.output(15, True)
print("green off")
I'd like to do a nice buttony volume control here using alsamixer, maybe even a 4 button up, down, playpause next control.
GPIO EXAMPLE HARDWARE
GPIO PIN GUIDE
| 3.3v
| 1
| 2
| 5v
|
| I2C0 SDA
| 3
| 4
| DNC
|
| I2C0 SCL
| 5
| 6
| GND
|
| GPIO 4
| 7
| 8
| UART TX
|
| DNC
| 9
| 10
| UART RX
|
| GPIO 17
| 11
| 12
| GPIO 18
|
| GPIO 21
| 13
| 14
| DNC
|
| GPIO 22
| 15
| 16
| GPIO 23
|
| DNC
| 17
| 18
| GPIO 24
|
| SP10 MOSI
| 19
| 20
| DNC
|
| SP10 MISO
| 21
| 22
| GPIO 25
|
| SP10 SCLK
| 23
| 24
| SP10 CE0 N
|
| DNC
| 25
| 26
| SP10 CE1 N
|
I need to update this now we have the B+ and a few more GPIO pins.
| 3.3v
| 1
| 2
| 5v
|
| I2C0 SDA
| 3
| 4
| DNC
|
| I2C0 SCL
| 5
| 6
| GND
|
| GPIO 4
| 7
| 8
| UART TX
|
| DNC
| 9
| 10
| UART RX
|
| GPIO 17
| 11
| 12
| GPIO 18
|
| GPIO 21
| 13
| 14
| DNC
|
| GPIO 22
| 15
| 16
| GPIO 23
|
| DNC
| 17
| 18
| GPIO 24
|
| SP10 MOSI
| 19
| 20
| DNC
|
| SP10 MISO
| 21
| 22
| GPIO 25
|
| SP10 SCLK
| 23
| 24
| SP10 CE0 N
|
| DNC
| 25
| 26
| SP10 CE1 N
|
|
| 27
| 28
|
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| 29
| 30
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| 31
| 32
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| 33
| 34
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