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3keys

一个CH552制作的三键小键盘 CV工程师键盘

视频介绍https://www.bilibili.com/video/BV1M84y1n7r1

CH552芯片是一款兼容MCS51 指令集的增强型E8051内核单片机，其79%的指令是单字节单周期指令，平均指令速度比标准MCS51快8～15 倍。 CH552 支持最高24MHz 系统主频，内置16K 程序存储器ROM 和256 字节内部iRAM 以及1K 字节片内xRAM，xRAM 支持DMA直接内存存取。 CH552内置了ADC 模数转换、触摸按键电容检测、3 组定时器和信号捕捉及PWM、双异步串口、SPI、USB设备控制器和全速收发器、USB type-C等功能模块。

你可以直接打板制作，使用沁恒(CH552厂家)的WCHISPStudio工具烧录threekey.ino.hex即可 烧录教程https://topyuan.top/3key/howtoupdate

可以使用Chrome浏览器直接访问https://topyuan.top/3key 进行改键 （备用地址 https://yuan910715.github.io/3key ） 3key-web目录为web改键源码 使用Vue + Element UI开发

部分精简版Win7需要装驱动 请自行搜索win7万能键盘驱动、win7 CDC驱动安装 万能键盘驱动用于识别键盘 CDC用于连接改键页

web

ch552g目录下为 键盘程序源码。开发环境参考https://github.com/DeqingSun/ch55xduino 感谢DeqingSun的指导DeqingSun/ch55xduino#112

WindowsFormsApp1目录为改键程序源码。使用visual studio .net framework 4.0开发 windows改键程序已废弃 请使用web改键

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软件

特点

  • 可自定义按键，有改键程序，可以是普通按键 功能按键 多媒体按键 组合键 输入字符串 模拟鼠标
  • 每个键位的设置可以记忆在硬件内 换机器也可正常使用

2023.6.16 软件更新为threekey_v5.1.hex 修复Key2字符串记忆错乱问题 修复三键按下部分设置不能记忆问题

2023.5.4 软件更新为threekey_v5.0.hex 新增鼠标设置

2023.4.25 软件更新为threekey_v4.1.hex 修复了windows在刚连接键盘就立刻按键的情形 按键失效问题 感谢DeqingSun的指导DeqingSun/ch55xduino#132

2023.3.27 软件更新为threekey_v4.hex 修改组合键逻辑 最多支持5键组合 新增三键同时按下逻辑 web改键已同步更新，windows改键程序已废弃，若在无外网环境无法访问web改键 可本地chrome浏览器打开3key-web里的index.html修改按键 程序也有所更新 以下代码解析非最新代码 请自行比对代码

代码解析： threekey.ino中 ,

全局变量如下：

三个按键的按下或释放状态：

bool button1PressPrev = false;
bool button2PressPrev = false;
bool button3PressPrev = false;

三个按键的键位设置, 默认为ctrl c v

//ctrl
char key1=0x80;
//c
char key2='c';
//v
char key3='v';

3个按键的功能种类 0为普通按键 1为多媒体按键 2为组合键 3为字符串

// is mediakey?
byte key1func=0x00;
byte key2func=0x00;
byte key3func=0x00;

3个按键为组合键时 功能键的键位值; 为多媒体键时 若为16位无符号整数 为高位值

char key1f=0xff;
char key2f=0xff;
char key3f=0xff;

3个按键的字符串值 最大30位

__xdata char custStr1[30]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
__xdata char custStr2[30]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
__xdata char custStr3[30]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};

用于接收改键程序设置的报文

//keymap[0] start label
//keymap[1] key1
//keymap[2] key2
//keymap[3] key3
//keymap[4] key1func
//keymap[5] key2func
//keymap[6] key3func
//keymap[7] key1 f
//keymap[8] key2 f
//keymap[9] key3 f
//keymap[10]-[39] custom str1
//keymap[40]-[69] custom str2
//keymap[70]-[99] custom str3
//keymap[100] end label
__xdata char keymap[101]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff
                  };

接收改键程序报文时使用

int label=0;

setup()方法内, 设置3个按键位内部上拉模式, 并从eeprom读取3个按键的键位信息

loop()方法内, 从串口读取报文 约定0x02为起始位标记 0x03为结束位标记， 报文长度101与keymap对应 , 若为0x02 0x03, 约定为查询报文 返回键位信息

while(USBSerial_available()) {
    char serialChar = USBSerial_read();
    if ((serialChar != '\n') && (serialChar != '\r') ) {
      if(label>100){
        label=0;
        }
      if(label==0 && serialChar!=0x02){
        continue;
      }
      if(label==1 && serialChar==0x03){
      	USBSerial_println(key1,HEX);
        USBSerial_println(key2,HEX);
        USBSerial_println(key3,HEX);
        USBSerial_println(key1func,HEX);
        USBSerial_println(key2func,HEX);
        USBSerial_println(key3func,HEX);
        USBSerial_println(key1f,HEX);
        USBSerial_println(key2f,HEX);
        USBSerial_println(key3f,HEX);
        for(int i=0;i<30;i++){
            if(custStr1[i]==0xff){
              break;
              }
             USBSerial_print_c(custStr1[i]);  
         }
         USBSerial_println();
         for(int i=0;i<30;i++){
            if(custStr2[i]==0xff){
              break;
              }
             USBSerial_print_c(custStr2[i]);  
         }
           USBSerial_println();
         for(int i=0;i<30;i++){
            if(custStr3[i]==0xff){
              break;
              }
             USBSerial_print_c(custStr3[i]);  
         }   
           USBSerial_println();
        USBSerial_flush();
      	 label=0;
      	 continue;
      }
      keymap[label]=serialChar;
      label++;
    } 
  }

设置报文接收完毕 改键位值 并写入eeprom

if(label==101){
      label=0;
      if(keymap[0]==0x02 && keymap[100]==0x03){
        USBSerial_print_s("1");
        USBSerial_flush();
        for(int i=0;i<98;i++){
        eeprom_write_byte(i, keymap[i+1]);
        }
        key1=keymap[1];
        key2=keymap[2];
        key3=keymap[3];
        key1func=keymap[4];
        key2func=keymap[5];
        key3func=keymap[6];
        key1f=keymap[7];
        key2f=keymap[8];
        key3f=keymap[9];
        for(int i=0;i<30;i++){
        custStr1[i]=keymap[10+i];
        custStr2[i]=keymap[40+i];
        custStr3[i]=keymap[70+i];
        }
       
      }
  }

判断按键按下状态 判断key1fuc值决定是哪种按键模式 执行相应操作 唯一特殊的是多媒体键有8位整数和16位两种 如为16位 key1f会保存高8位值 需左移8位加上低8位的key1

bool button1Press = !digitalRead(BUTTON1_PIN);
  if (button1PressPrev != button1Press) {
    button1PressPrev = button1Press;
    if (button1Press) {
      if(key1func==0x00){  //normal
        Keyboard_press(key1);
      }
      else if(key1func==0x01){ //media
      	if(key1f!=0xff){
      		Consumer_press((key1f<<8)+key1);
      	}else{
        Consumer_press(key1);
     		}
      }
      else if(key1func==0x02){ //mix
         Keyboard_press(key1f);
         Keyboard_press(key1);
      }
      else if(key1func==0x03){ //string
         for(int i=0;i<30;i++){
            if(custStr1[i]==0xff){
              break;}
             Keyboard_write(custStr1[i]);
         }
      }   


    }
    else {
       if(key1func==0x00){  //normal
        Keyboard_release(key1);
      }
      else if(key1func==0x01){ //media
        if(key1f!=0xff){
          Consumer_release((key1f<<8)+key1);
        }
        Consumer_release(key1);
      }
      else if(key1func==0x02){ //mix
         Keyboard_release(key1);
         Keyboard_release(key1f);
      }    
    }
  }

改键程序： 已废弃

gaijian2

改键程序代码不再详细解析, 原理为串口和键盘通讯 发送0x02 0x03查询键位值 , 发送

0x02 key1 key2 key3 key1func key2func key2func key1f key2f key3c key1string(30字节) key2string(30字节) key3string(30字节) 0x03

设置键位值

示例,将3个按键都改为模式3字符串：

02 63 76 78 03 03 03 80 81 82 41 42 43 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 43 43 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 41 41 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 03

USBconstant.c内可更改连接到电脑后 识别的设备名称: 3-key

__code uint16_t Prod_Des[]={                                //Produce String Descriptor
    0x0316,
    '-','Y','u','a','n','-','3','k','e','y',
};

硬件

感谢phantomR ，我把小灯删了，Type C换成了0.58元的便宜版本。 硬件只需2个100nf电容(0603) 一个CH552G 一个typeC母座(优信0.58那个有柱16p) 一个20k欧电阻 一个下载开关(不焊也行我就没焊 CH552G首次自动进写入模式 后续要进就用镊子短接)

硬件开源地址 https://oshwhub.com/inramento/3jian-CVxiao-jian-pan

原理图： 非最新 最新增加了两个cc 5.1k电阻用于识别c to c线 请在开源广场自行查看 yuanlitu

2023.3.9更新 V3.0版本 新增了R2 R3 两个5.1K电阻 用于C TO C线 如果不焊接这两个电阻 将只能使用 A TO C线 加大了TYPE C焊盘 降低焊接难度 v3_1： v3_1

v3_2： v3_2

v3_3： v3_3

pcb1： pcb1

pcb2： pcb2

pcb3： pcb3

pcb4： pcb4

pcb5： pcb5

黑色版本 有小灯 因为效果不好 板子上已经把小灯删了 1

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3keys's People

Contributors

yuan910715 avatar hikari31768 avatar

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