RK3288 红外遥控器增加系统中已有的键值

转载请注明出处：https://www.cnblogs.com/lialong1st/p/10066673.html

CPU：RK3288

系统：Android 5.1

1、查看遥控器的用户码和键值，供应商给的可能是反码，也有可能不正确。

打开红外打印功能有以下两种方式，内核打印可以用串口，也可以在adb中使用指令 # cat  proc/kmsg

(1)通过指令打开红外接收的打印功能，然后按遥控器按键，就可以在内核打印中看到用户码和键值。

$ adb shell
root@rk3288:/ # cd sys/module/rockchip_pwm_remotectl/parameters
cd sys/module/rockchip_pwm_remotectl/parameters
root@rk3288:/sys/module/rockchip_pwm_remotectl/parameters # ls
ls
code_print
dbg_level
root@rk3288:/sys/module/rockchip_pwm_remotectl/parameters # cat code_print
cat code_print

root@rk3288:/sys/module/rockchip_pwm_remotectl/parameters # echo  > code_print
echo  > code_print

(2)在红外接收的源码中，给下面变量赋值，也可以打印用户码和键值，但需要重新编译烧录内核

path：kernel/drivers/input/remotectl/rockchip_pwm_remotectl.c

static int rk_remote_print_code = ;

2、在dts文件中增加键值，绝大部分键值系统中已经定义，如果没有的就需要自己添加。

path：kernel/arch/arm/boot/dts/rk3288.dtsi

remotectl: pwm@ff680000 {
        compatible = "rockchip,remotectl-pwm";
        reg = <0xff680000 0x10>;
        #pwm-cells = <>;
        pinctrl-names = "default";
        pinctrl- = <&pwm0_pin>;
        clocks = <&clk_gates11 >;
        clock-names = "pclk_pwm";
        remote_pwm_id = <>;
        interrupts = <GIC_SPI  IRQ_TYPE_LEVEL_HIGH>;
        status = "disabled";
    };

remote_pwm_id：使用pwm0

path：kernel/arch/arm/boot/dts/rk3288-tb_8846.dts

&remotectl {
    status = "okay";
    handle_cpu_id = <>;
    ir_key0{
        rockchip,usercode = <0xff00>;
        rockchip,key_table =
            <0xf0 KEY_POWER>,        // Power
            <0xad KEY_HOME>,         // Home
            <0xef KEY_MENU>,         // Menu
            <0xa7 KEY_MUTE>,         // mute
            <0xa1 >,              // Mouse
            <0xb2 KEY_UP>,           // Up
            <0xee KEY_PAGEUP>,       // PageUp
            <0xa3 KEY_VOLUMEUP>,     // Vol+
            <0xa8 KEY_LEFT>,         // Left
            <0xa4 KEY_ENTER>,        // Ok/ENTER
            <0xa0 KEY_RIGHT>,        // Right
            <0xab KEY_VOLUMEDOWN>,   // Vol-
            <0xa9 KEY_TAB>,          // Tab
            <0xa5 KEY_DOWN>,         // Down
            <0xed KEY_PAGEDOWN>,     // PageDown
            <0xac KEY_BACK>,         // Back
            <0xe8 KEY_1>,            //
            <0xe4 KEY_2>,            //
            <0xe0 KEY_3>,            //
            <0xe9 KEY_4>,            //
            <0xe5 KEY_5>,            //
            <0xe1 KEY_6>,            //
            <0xea KEY_7>,            //
            <0xe6 KEY_8>,            //
            <0xe2 KEY_9>,            //
            <0xe7 KEY_0>,            //
            <0xeb KEY_DOT>,          // .
            <0xe3 KEY_DELETE>,       // Del
            <0xa6 KEY_PAUSE>,        // Pause
            <0xaa KEY_PLAY>;         // Play
    };
};

usercode：用户码

key_table：左侧为遥控器键值，右侧为按键对应的功能码

绝大部分功能码可以在下面文件中查找到，写宏或者对应的数字都可以（例如mouse键），如果的确没有，可以用功能键代替或者手动添加。

path：kernel/include/dt-bindings/input/input.h

此时，编译烧录，按键值就可以通过 getevent 查看到，但app中收到的按键值可能与实际不对应或者未知按键。

getevent用法：https://www.cnblogs.com/lialong1st/p/9093851.html

3、打开下面路径的文件，可以看到功能码和上层对应的关系， 如果新添加的按键值没有，也需要按照已有的格式手动添加。

没有的按键值，在按键时，上层app收到的值是未知按键。

path：device/rockchip/common/ff680000_pwm.kl

key     ENTER
key    POWER
key    BACK
key    MENU
key    SEARCH
key    DPAD_CENTER
key    DPAD_DOWN
key    DPAD_UP
key    HOME
key    DPAD_LEFT
key    DPAD_RIGHT
key    VOLUME_UP
key    VOLUME_DOWN
key    NOTIFICATION
key    VOLUME_MUTE
key    TV_KEYMOUSE_MODE_SWITCH
key    PAGE_UP
key    PAGE_DOWN
key     TAB
key
key
key
key
key
key
key
key
key
key
key     PERIOD
key    DEL
key    MEDIA_PAUSE
key    MEDIA_PLAY

中间的数字是功能码对应的数字，与第二步的查找方法一致。

右侧的是与上层对应的关系，在下面路径中任意一个都可以查找到，如有特殊功能键则需要添加。

path：frameworks/base/core/java/android/view/KeyEvent.java（例如：KEYCODE_DPAD_DOWN 只需要取后半部分就可以）

path：frameworks/native/include/input/InputEventLabels.h（例如：DPAD_DOWN 只需要取括号内部的就可以）

注意：数字键不要用小键盘（NUMPAD_0 等等），因为小键盘有多功能。

此时，就大功告成了。

下面为简单的遥控器测试app源码

MainActivity.java

package com.example.aaron.irtest;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.widget.TextView;
import android.widget.Toast;

import java.time.LocalDate;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "IR";
    TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv = (TextView) findViewById(R.id.display);
    }

    public boolean onKeyDown(int keyCode, KeyEvent event)
    {
        Log.d(TAG, String.valueOf(keyCode));
        switch (keyCode)
        {
            case KeyEvent.KEYCODE_POWER:
                tv.setText("电源键");
                Toast.makeText(getBaseContext(), "电源键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_HOME:
                tv.setText("主页键");
                Toast.makeText(getBaseContext(), "主页键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_MENU:
                tv.setText("菜单键");
                Toast.makeText(getBaseContext(), "菜单键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_VOLUME_MUTE:
                tv.setText("静音键");
                Toast.makeText(getBaseContext(), "静音键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_STEM_PRIMARY:
                tv.setText("鼠标键");
                Toast.makeText(getBaseContext(), "鼠标键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_DPAD_UP:
                tv.setText("上键");
                Toast.makeText(getBaseContext(), "上键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_PAGE_UP:
                tv.setText("上页键");
                Toast.makeText(getBaseContext(), "上页键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_VOLUME_UP:
                tv.setText("音量+键");
                Toast.makeText(getBaseContext(), "音量+键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_DPAD_LEFT:
                tv.setText("左键");
                Toast.makeText(getBaseContext(), "左键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_ENTER:
                tv.setText("确认键");
                Toast.makeText(getBaseContext(), "确认键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_DPAD_RIGHT:
                tv.setText("右键");
                Toast.makeText(getBaseContext(), "右键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_VOLUME_DOWN:
                tv.setText("音量-键");
                Toast.makeText(getBaseContext(), "音量-键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_TAB:
                tv.setText("Tab键");
                Toast.makeText(getBaseContext(), "Tab键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_DPAD_DOWN:
                tv.setText("下键");
                Toast.makeText(getBaseContext(), "下键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_PAGE_DOWN:
                tv.setText("下页键");
                Toast.makeText(getBaseContext(), "下页键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_BACK:
                tv.setText("返回键");
                Toast.makeText(getBaseContext(), "返回键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_1:
                tv.setText("1");
                Toast.makeText(getBaseContext(), "1", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_2:
                tv.setText("2");
                Toast.makeText(getBaseContext(), "2", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_3:
                tv.setText("3");
                Toast.makeText(getBaseContext(), "3", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_4:
                tv.setText("4");
                Toast.makeText(getBaseContext(), "4", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_5:
                tv.setText("5");
                Toast.makeText(getBaseContext(), "5", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_6:
                tv.setText("6");
                Toast.makeText(getBaseContext(), "6", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_7:
                tv.setText("7");
                Toast.makeText(getBaseContext(), "7", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_8:
                tv.setText("8");
                Toast.makeText(getBaseContext(), "8", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_9:
                tv.setText("9");
                Toast.makeText(getBaseContext(), "9", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_0:
                tv.setText("0");
                Toast.makeText(getBaseContext(), "0", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_PERIOD:
                tv.setText("小数点");
                Toast.makeText(getBaseContext(), "小数点", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_DEL:
                tv.setText("删除键");
                Toast.makeText(getBaseContext(), "删除键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_MEDIA_PAUSE:
                tv.setText("暂停键");
                Toast.makeText(getBaseContext(), "暂停键", Toast.LENGTH_SHORT).show();
                break;
            case KeyEvent.KEYCODE_MEDIA_PLAY:
                tv.setText("播放键");
                Toast.makeText(getBaseContext(), "播放键", Toast.LENGTH_SHORT).show();
                break;
        }
        return false;
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.aaron.irtest.MainActivity">

    <TextView
        android:id="@+id/display"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:textSize="50sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

RK3288 红外遥控器增加自定义按键