红外遥控

1. 简介

Omni3576 的红外传感器默认连接的是 PWM0_CH0_M0 引脚下，本小节主要描述如何测试和配置红外遥控。红外接收器位于 Omni3576 电源接口旁侧。

2. 测试

查看输入事件设备，其中pwm-event对应的就是红外遥控。

root@luckfox:/home/luckfox# ls -l /dev/input/by-path/
total 0
lrwxrwxrwx 1 root root 9 Oct 17 06:47 platform-27330000.pwm-event -> ../event0
lrwxrwxrwx 1 root root 9 Oct 17 06:47 platform-2ac40000.i2c-platform-rk805-pwrkey.2.auto-event -> ../event1
lrwxrwxrwx 1 root root 9 Oct 17 06:47 platform-dp0-sound-event -> ../event3
lrwxrwxrwx 1 root root 9 Oct 17 06:47 platform-wireless-bluetooth-event -> ../event2
lrwxrwxrwx 1 root root 9 Oct 17 06:47 platform-xhci-hcd.0.auto-usb-0:1.4:1.0-event-kbd -> ../event4
lrwxrwxrwx 1 root root 9 Oct 17 06:47 platform-xhci-hcd.0.auto-usb-0:1.4:1.1-event -> ../event6

获取红外遥控键值。
```
echo 1 > /sys/module/rockchip_pwm_remotectl/parameters/code_print
```
- 调试串口会打印出红外遥控的按键值，ADB 和 SSH 等终端需要使用dmesg命令查看

3. 设备树简介

设备文件路径位于kernel-6.1/arch/arm64/boot/dts/rockchip/luckfox-omni3576.dts，开启IR的代码片段如下：

&pwm0_2ch_0 {

        //compatible = "rockchip,remotectl-pwm";
        compatible = "rockchip,remotectl-pwm-v4";
        status = "okay";
        pinctrl-0 = <&pwm0m0_ch0>;
        pinctrl-names = "default";
        //interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
        remote_pwm_id = <3>;
        handle_cpu_id = <1>;
        remote_support_psci = <0>;

        ir_key_luckfox{
                rockchip,usercode = <0xff00>;
                rockchip,key_table =
                        <0xb7        KEY_BACK>,
                        <0xe9        KEY_UP>,
                        <0xe8        KEY_DOWN>,
                        <0xe6        KEY_LEFT>,
                        <0xe7        KEY_RIGHT>,
                        <0x6b        KEY_HOME>,
                        <0xbb        KEY_VOLUMEUP>,
                        <0xbc        KEY_VOLUMEDOWN>,
                        <0xf2        KEY_POWER>,
                        <0xea        KEY_ENTER>,
                        <0xeb        KEY_MENU>;
        };
};

1. 简介​

2. 测试​

3. 设备树简介​

1. 简介

2. 测试

3. 设备树简介