arduino平台读取鼠标光电传感器

鼠标坏掉了，大抵是修不好了。（全剧终---）

但是爱动手的小明不会浪费这个鼠标，确认外观没有明显烧毁痕迹后，尝试从电路板上利用光电传感器进行位移的测量，光电传感器（型号：FCT3065）找不到datasheet，但查到内核仿的是PAW3205, 因此只需要参考后者的datasheet即可。

通过电路板的led找到LED引脚，确定引脚信息，开始操作

首先去掉鼠标主控芯片，然后飞线将vdd连接到电源正极，注意供电不能高于3.6v，再焊接4根杜邦线，引出SDIO、SCLK、电源正负极即可，盖上盖子，测试！

复制代码

/*
   Program to interface FCT3065-XY Optical Mouse
   Sensor with Arduino.

   This code detects when mouse is moved and also
   prints the change in x direction and change in y
   direction in the serial monitor.

   Author: Vineet Sukhthanker
   Date: 6 October 2020


*/

//Register Addresses from datasheet
#define PROD_ID1 0x00
#define PROD_ID2 0x01
#define MOTION_STATUS 0X02
#define DEL_X 0x03
#define DEL_Y 0x04
#define OP_MODE 0x05
#define CONF 0x06
#define IMG_QUALITY 0x07
#define OP_STATE 0x08
#define W_PROTECT 0x09
#define SLEEP1_SET 0x0A
#define ENTER_TIME 0x0B
#define SLEEP2_SET 0x0C
#define IMG_THRESHOLD 0x0D
#define IMG_RECOG 0x0E

const int SCLK = 13;
const int SDIO = 12;

byte noSleep = 0xA0;

int i = 0;
void setup() {
  Serial.begin(115200);
  pinMode (SCLK, OUTPUT);
  mouseInit();

  byte prodId1 = readRegister(PROD_ID1);
  Serial.print((prodId1 == 0x31) ? "\nDevice OK" : "\nUnknown Device"); // checks for product ID
  Serial.print(prodId1);
}

void loop() {
  int motion = readRegister(MOTION_STATUS); // read motion status register
  // if(motion==0x81){
  Serial.print("\nMoved!");
  Serial.print(motion);
  int8_t delta_x = readRegister(DEL_X); // read delta x register
  int8_t delta_y = readRegister(DEL_Y); // read delta y register
  Serial.print("\nX:");

  Serial.print(delta_x);

  Serial.print(" Y:");

  Serial.print(delta_y);
  //}
  delay(1000);
}

void mouseInit(void) // function to initialize optical sensor.
{
  digitalWrite(SCLK, HIGH);
  digitalWrite(SCLK, LOW);
  delayMicroseconds(1); // tRESYNC = 1us (mentioned in datasheet)
  digitalWrite(SCLK, HIGH);
  delay(320); // tSIWTT = 320ms (mentioned in datasheet)
  digitalWrite(SCLK, LOW);
  writeRegister(OP_MODE, noSleep); // disable sleep mode
}

byte readRegister(byte address) {
  pinMode (SDIO, OUTPUT);

  for (byte i = 128; i > 0 ; i >>= 1) {
    digitalWrite (SCLK, LOW);
    digitalWrite (SDIO, (address & i) != 0 ? HIGH : LOW);
    digitalWrite (SCLK, HIGH);
  }

  pinMode (SDIO, INPUT);

  delayMicroseconds(3); // tHOLD = 3us (mentioned in datasheet)

  byte res = 0;
  for (byte i = 128; i > 0 ; i >>= 1) {
    digitalWrite (SCLK, LOW);
    digitalWrite (SCLK, HIGH);
    if ( digitalRead (SDIO) == HIGH )
      res |= i;
  }

  delayMicroseconds(3); // tHOLD = 3us min. (mentioned in datasheet)

  return res;
}

void writeRegister(byte address, byte data) {
  address |= 0x80; // MSB indicates write mode.
  pinMode (SDIO, OUTPUT);

  for (byte i = 128; i > 0 ; i >>= 1) {
    digitalWrite (SCLK, LOW);
    digitalWrite (SDIO, (address & i) != 0 ? HIGH : LOW);
    digitalWrite (SCLK, HIGH);
  }

  for (byte i = 128; i > 0 ; i >>= 1) {
    digitalWrite (SCLK, LOW);
    digitalWrite (SDIO, (data & i) != 0 ? HIGH : LOW);
    digitalWrite (SCLK, HIGH);
  }

  delayMicroseconds(100);
}

效果如图，x和y坐标分别向下向右为正，寄存器补码形式存储8位位移量

大合照（或许旋转编码器还再可以玩一玩）

参考

如何优雅的DIY鼠标？

FCT3065-XY_MouseSensor。