Instalar LIRC
Ubuntu 20.04 - 20.10 https://www.lirc.org/LIRC para LINUX é um pacote que permite receber e enviar sinais de IR(Infra Red, Infra Vermelhos) normalmente usados nos comandos remotos. Pode-se, assim, desenvolver programas que controlam os dispositivos(TV, AC, HI-FI etc), memorizar os códigos existentes e usar esses códigos a partir do sistema. Existem várias listas algumas disponibilizadas pelos fabricantes que permitem ter, de imediato, o LIRC a funcionar para o dispotivo que precisamos (http://lirc-remotes.sourceforge.net/remotes-table.html).
$ sudo apt update $ sudo apt upgrade
$ sudo apt install lirc
Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: libftdi1-2 liblirc-client0 liblirc0 libportaudio2 libusb-0.1-4 Suggested packages: lirc-compat-remotes lirc-drv-irman lirc-doc lirc-x setserial ir-keytable Recommended packages: gir1.2-vte The following NEW packages will be installed: libftdi1-2 liblirc-client0 liblirc0 libportaudio2 libusb-0.1-4 lirc 0 upgraded, 6 newly installed, 0 to remove and 0 not upgraded. Need to get 660 kB of archives. After this operation, 3010 kB of additional disk space will be used. Do you want to continue? [Y/n]
... driver = default device = /dev/lirc0 ...
dtoverlay=gpio-ir,gpio_pin=23 dtoverlay=gpio-ir-tx, gpio_pin=22
[pi4] max_framebuffers=2 [all] arm_64bit=1 kernel=vmlinuz cmdline=cmdline.txt initramfs initrd.img followkernel # Enable the audio output, I2C and SPI interfaces on the GPIO header dtparam=audio=on dtparam=i2c_arm=on dtparam=spi=on # Enable the serial pins enable_uart=1 # Comment out the following line if the edges of the desktop appear outside # the edges of your display disable_overscan=1 # If you have issues with audio, you may try uncommenting the following line # which forces the HDMI output into HDMI mode instead of DVI (which doesn't # support audio output) #hdmi_drive=2 # If you have a CM4, uncomment the following line to enable the USB2 outputs # on the IO board (assuming your CM4 is plugged into such a board) #dtoverlay=dwc2,dr_mode=host # configuração adicionada para o LIRC dtoverlay=gpio-ir,gpio_pin=23 dtoverlay=gpio-ir-tx, gpio_pin=22
sudo systemctl stop lircd.service sudo systemctl start lircd.service sudo systemctl status lircd.service
sudo reboot
Testar controlo remoto
Se existir um recetor de IR no pino definido em config.txt, podemos testar Paramos o serviço e atuamos com mode2
sudo systemctl stop lircd.service sudo mode2 -d /dev/lirc0 ou sudo mode2 -d /dev/lirc1
Apontando o remoto para o LED IR recetor aparecem os comaando enviados, por exemplo,
space pulse
Instalar IR key-table
Instalarsudo apt install ir-keytable
Verificar remotos pré instalados
ls /lib/udev/rc_keymaps/sudo ir-keytable sudo ir-keytable Found /sys/class/rc/rc1/ with: Name: gpio_ir_recv Driver: gpio_ir_recv Default keymap: rc-rc6-mce Input device: /dev/input/event3 LIRC device: /dev/lirc1 Attached BPF protocols: Operation not supported Supported kernel protocols: lirc rc-5 rc-5-sz jvc sony nec sanyo mce_kbd rc-6 sharp xmp imon Enabled kernel protocols: lirc bus: 25, vendor/product: 0001:0001, version: 0x0100 Repeat delay = 500 ms, repeat period = 125 ms
sudo ir-keytable -v -t -p rc-5,rc-5-sz,jvc,sony,nec,sanyo,mce_kbd,rc-6,sharp,xmp
Gravar comando remoto
The output of the command below is shown in the screenshot irrecord --list-namespace irrecord -d /dev/lirc0 my.conf https://github.com/mtraver/rpi-ir-remote
sudo dtc -I fs /sys/firmware/devicetree/base -O dts -o loaded\_device\_tree.dts
https://github.com/josemotta/IoT.Starter.Pi.Lirc/blob/master/RPI_Setup.md
https://github.com/AnaviTechnology/anavi-docs/blob/master/anavi-infrared-phat/anavi-infrared-phat.md#using-ir-led
https://devkimchi.com/2020/08/12/turning-raspberry-pi-into-remote-controller/
apt install v4l-utils
ir-ctl - -send=KEY\_POWER.txt
sudo cat /sys/kernel/debug/pinctrl/3f200000.gpio-pinctrl-bcm2835/pinmux-pins