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raspberrypi (B+) のGPIOをProcessingで制御するときのメモ

Posted at

pi@raspberrypi ~ $ gpio readall

BCM wPi Name Mode V Physical V Mode Name wPi BCM
3.3v 1 2 5v
2 8 SDA.1 ALT0 1 3 4 5V
3 9 SCL.1 ALT0 1 5 6 0v
4 7 GPIO. 7 IN 0 7 8 1 ALT0 TxD 15 14
0v 9 10 1 ALT0 RxD 16 15
17 0 GPIO. 0 IN 0 11 12 0 IN GPIO. 1 1 18
27 2 GPIO. 2 IN 0 13 14 0v
22 3 GPIO. 3 IN 0 15 16 0 IN GPIO. 4 4 23
3.3v 17 18 0 IN GPIO. 5 5 24
10 12 MOSI IN 0 19 20 0v
9 13 MISO IN 0 21 22 0 IN GPIO. 6 6 25
11 14 SCLK IN 0 23 24 0 IN CE0 10 8
0v 25 26 0 IN CE1 11 7
0 30 SDA.0 ALT0 0 27 28 0 ALT0 SCL.0 31 1
5 21 GPIO.21 IN 0 29 30 0v
6 22 GPIO.22 IN 0 31 32 0 IN GPIO.26 26 12
13 23 GPIO.23 IN 0 33 34 0v
19 24 GPIO.24 OUT 0 35 36 0 IN GPIO.27 27 16
26 25 GPIO.25 IN 0 37 38 0 IN GPIO.28 28 20
0v 39 40 0 IN GPIO.29 29 21
BCM wPi Name Mode V Physical V Mode Name wPi BCM

ラズパイのgpioコマンドで取得するピンの情報と、実機との関係がいつもよくわからなくなるのでメモを残しておきます。

gpioコマンドで指定する番号はBCM列の番号を使う
gpio -g mode 17 out
とするとBCM列17番のモードがoutに変わる。
よくあるラズパイのGPIOシートもこの番号。
processingのpi4jでは、この番号ではなく、Name列の値を
指定する。。ここではRasPin.GPIO_00。
processingでは以下の様に指定する。
pin0 = gpio.provisionDigitalOutputPin(RaspiPin.GPIO_00, "MyLED", PinState.LOW);

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