用Arduino制作一个摇杆式鼠标&温度监视器

为了把之前挖的说要搭一台UMPC的大坑给填上，必须要有一个足够小的、能当鼠标用的装置，所以就弄出了这么个玩意...

首先看看这个项目的原型，Toshiba Libretto系列和Thinkpad 750，都是使用的指点杆
然而指点杆太贵了，一个要40多，而且PCB还很大，装不进键盘里，所以实际上和摇杆没什么区别了...
那就弄摇杆好了...
然后事实证明便宜确实没好货，摇杆转20°左右就满量程了，而且阻尼很大，用起来让人觉得喝了假酒
那么要怎么让它用起来稍微好一点呢？
因为阻尼大，转起来很难精确控制转动的角度 --> 那就降低光标的移动速度
然而这样光标要走过很长的距离时就很痛苦 --> 弄个加速键
这样虽然说妥协很大，用起来远远不如小红点顺手，但是...嘿！它能用！
再把左键，右键，中键加上之后用一段时间还算顺手，那就这样了吧...

既然用了Arduino来当鼠标了，那不加一块屏幕就太浪费了
于是就弄了那块128*64，0.96'的OLED屏幕显示下温度，风扇转速和警告信息，看起来相当不错(最终效果见上图)

(测试中...)

然后是用这玩意解决一些在测试其它系统的时候发现的问题：
<1>本来是准备用一个简单的霍尔+MOSFET的独立电路来做到控制主屏幕在开合时的开关的，结果P沟道MOSFET忘买了...再去为了一个MOSFET付十块钱的运费实在是不值，也懒得拿三极管做非门了...那就干脆用Arduino解决算了
这里没什么好讲的，就是给栅极10k的下拉电阻似乎太小了，直接上680k下拉解决
<2>键盘是买的现成的，拿到手发现虽然质量还行，但是有Z+Shift会和方向左键冲突...
本来这不是什么大问题，但是对于东方玩家来说实在致命...于是就弄了个自锁开关，按下会一直按Z，问题解决！

最后，还有50%的剩余ROM空间，那就加个非常中二的Boot Screen好了...

最后的最后，放下写的稀烂的代码(BootScreen删掉了)

#include <Mouse.h>
#include <Keyboard.h>
#include <U8glib.h>
U8GLIB_SSD1306_128X64 u8g(4, 5, 6);
const int xPin = A0;
const int yPin = A1;
const int caliButton = 9;
const int caliIndi = 16;
const int lButton = 12;
const int rButton = 10;
const int mainSW = 3;
const int scrlSW = 11;
const int accSW = 2;
const int zButtonSW = 1;
const int CPUTempSensor = A5;
const int battTempSensor = A4;
const int fanPin = 0;
const int hallSensor = 7;
const int screenMOSFET = 8;
//Pin configuration
int xCali;
int yCali; //Create variables for calibration
int xCalied;
int yCalied;
int xProcessed;
int yProcessed;
int CPUtemp;
int battTemp;
int fanSpeed;
boolean mouseSwitch;
//Declaring variables
void setup() {
  Serial.begin(9600);
  Mouse.begin();
  mouseSwitch = 0;
  pinMode(accSW, INPUT_PULLUP);
  u8g.setFont(u8g_font_7x13B);
}
void loop() { 
  CPUtemp = ((analogRead(CPUTempSensor) - 240) / 11);
  battTemp = ((analogRead(battTempSensor) - 240) / 11);//Temperature monitoring
  fanSpeed = (CPUtemp * 6) - 240;
  if (fanSpeed > 0){
    analogWrite(fanPin, fanSpeed);
  }else{
    analogWrite(fanPin, 0);
  }//Fan control
  if (digitalRead(hallSensor) == HIGH){
    digitalWrite(screenMOSFET, HIGH);
  }else{
    digitalWrite(screenMOSFET, LOW);
  }
  int xRaw = analogRead(xPin) - 512;
  int yRaw = analogRead(yPin) - 512;
  if (digitalRead(caliButton) == HIGH){
    xCali = 0 - xRaw;
    yCali = 0 - yRaw;
    digitalWrite(caliIndi, HIGH);
  }else{
    digitalWrite(caliIndi, LOW);
  }
  xCalied = (xRaw + xCali)/4;
  yCalied = (yRaw + yCali)/4;
  if (digitalRead(accSW) == LOW){
    xProcessed = ((10 * cos(0.01 * xCalied)) - 10 + xCalied) / 10;
    yProcessed = ((10 * cos(0.01 * yCalied)) - 10 + yCalied) / 10;
  }else{
    xProcessed = ((10 * cos(0.01 * xCalied)) - 10 + xCalied) / 16;
    yProcessed = ((10 * cos(0.01 * yCalied)) - 10 + yCalied) / 16;
  }
  if (digitalRead(mainSW) ==HIGH){
    mouseSwitch = 1;
  }else{
    mouseSwitch = 0;
  }
  if (mouseSwitch ==1){
    if (digitalRead(lButton) == HIGH){
      Mouse.press(MOUSE_LEFT);
    }else{
      Mouse.release(MOUSE_LEFT);
    }
    if (!(digitalRead(rButton) == HIGH && digitalRead(scrlSW) == HIGH)){   
      if (digitalRead(rButton) == HIGH){
        Mouse.press(MOUSE_RIGHT);
      }else{
        Mouse.release(MOUSE_RIGHT);
      }  
      if (digitalRead(scrlSW) == HIGH){
        Mouse.move(0, 0, xProcessed / 4);
      }else{
        Mouse.move(yProcessed, -xProcessed);
      }
      Mouse.release(MOUSE_MIDDLE);    
    }else{
      Mouse.press(MOUSE_MIDDLE);
      Mouse.move(yProcessed, -xProcessed);
    }  
  }
  if (digitalRead(zButtonSW) == HIGH){
    Keyboard.press('z');
  }else{
    Keyboard.release('z');
  }
  u8g.firstPage();
  do{
    u8g.setFont(u8g_font_7x13B);
    u8g.drawFrame(2, 2, 126, 62);
    u8g.drawStr(4, 13, "CPU Temp:");
    u8g.setPrintPos(70, 12);
    u8g.print(CPUtemp);
    u8g.drawStr(4, 27, "Batt Temp:");
    u8g.setPrintPos(77, 27);
    u8g.print(battTemp);
    u8g.drawStr(105, 62, "RPM");
    u8g.drawLine(105, 50, 126, 50);
    u8g.drawLine(105, 6, 126, 6);
    if (fanSpeed > 0){
      u8g.drawLine(108, (-(fanSpeed / 6) + 50), 123, (-(fanSpeed / 6) + 50));
    }
    u8g.drawStr(22, 48, "[ ][ ][ ]");
    if (battTemp > 50){
      u8g.drawStr(29, 48, "!");
    }
    if (digitalRead(caliButton) == HIGH){
      u8g.drawStr(50, 48, "*");
    }
    if (digitalRead(zButtonSW) == HIGH){
      u8g.drawStr(73, 48, "Z");
    } 
  }
  while(u8g.nextPage());
}

By Zephyr255
2020/8/21