libgpiod インストール
$ sudo apt install libgpiod2 libgpiod-dev libgpiod-doc
ドキュメント
ブラウザで開く
/usr/share/doc/libgpiod-dev/html/index.html
gpiod インストール
$ sudo apt install gpiod
GPIO検出チェック
$ gpiodetect
gpiochip0 [pinctrl-bcm2835] (54 lines)
GPIOピンアサイン
$ gpioinfo gpiochip0
gpiochip0 - 54 lines:
line 0: "ID_SDA" unused input active-high
line 1: "ID_SCL" unused input active-high
line 2: "SDA1" unused input active-high
line 3: "SCL1" unused input active-high
line 4: "GPIO_GCLK" "onewire@0" output active-high [used open-drain]
line 5: "GPIO5" unused input active-high
line 6: "GPIO6" unused input active-high
line 7: "SPI_CE1_N" "spi0 CS1" output active-low [used]
line 8: "SPI_CE0_N" "spi0 CS0" output active-low [used]
line 9: "SPI_MISO" unused input active-high
line 10: "SPI_MOSI" unused input active-high
line 11: "SPI_SCLK" unused input active-high
line 12: "GPIO12" unused input active-high
line 13: "GPIO13" unused input active-high
line 14: "TXD0" unused input active-high
line 15: "RXD0" unused input active-high
line 16: "GPIO16" unused input active-high
line 17: "GPIO17" unused input active-high
line 18: "GPIO18" unused input active-high
line 19: "GPIO19" unused input active-high
line 20: "GPIO20" unused input active-high
line 21: "GPIO21" unused input active-high
line 22: "GPIO22" unused input active-high
line 23: "GPIO23" unused input active-high
line 24: "GPIO24" unused input active-high
line 25: "GPIO25" unused input active-high
line 26: "GPIO26" unused input active-high
line 27: "GPIO27" unused input active-high
line 28: "SDA0" unused input active-high
line 29: "SCL0" unused input active-high
line 30: "NC" unused input active-high
line 31: "LAN_RUN" unused output active-high
line 32: "CAM_GPIO1" unused output active-high
line 33: "NC" unused input active-high
line 34: "NC" unused input active-high
line 35: "PWR_LOW_N" "PWR" input active-high [used]
line 36: "NC" unused input active-high
line 37: "NC" unused input active-high
line 38: "USB_LIMIT" unused output active-high
line 39: "NC" unused input active-high
line 40: "PWM0_OUT" unused input active-high
line 41: "CAM_GPIO0" "cam1_regulator" output active-high [used]
line 42: "SMPS_SCL" unused output active-high
line 43: "SMPS_SDA" unused input active-high
line 44: "ETH_CLK" unused input active-high
line 45: "PWM1_OUT" unused input active-high
line 46: "HDMI_HPD_N" unused input active-high
line 47: "STATUS_LED" "ACT" output active-high [used]
line 48: "SD_CLK_R" unused input active-high
line 49: "SD_CMD_R" unused input active-high
line 50: "SD_DATA0_R" unused input active-high
line 51: "SD_DATA1_R" unused input active-high
line 52: "SD_DATA2_R" unused input active-high
line 53: "SD_DATA3_R" unused input active-high
パーミッション
一般ユーザで使えるようにする。
ファイル /etc/udev/rules.d/60-gpiod.rulesを修正
SUBSYSTEM=="gpio", KERNEL=="gpiochip[0-1]", GROUP="plugdev", MODE="0660"
ファイル /etc/mdev.confに追加
gpiochip([0-9]+) root:wheel 660
python3-libgpiod
やっぱり、pythonを使いたい!
$ sudo apt install python3-libgpiod
