触摸—capacitive touch

邓维安 发表于 2012-9-17 15:51:49

不要崇拜哥，哥为人民服务，哥已不在社区，但社区每一个角落都流传着哥的传说。
OK，装B的废话哥已经说完了。镜头转向摸摸板capacityve touch.

先上个图

OK，上完图之后就要上代码了，这是官方的demo

/*
TouchWheel.pde
MPR121 WhellPad Example Code

by:Waiman Zhao
Mail:[email protected]
created on: 11/2/14

   SDA -> A4
   SCL -> A5
   IRQ -> D2
*/
#include <Wire.h>
#include"mpr121.h"

int pin = 13;
volatile int state = LOW;
int key = 0;

void setup()
{
Serial.begin(9600);
Wire.begin();
mpr121QuickConfig();
delay(500);
pinMode(pin, OUTPUT);
attachInterrupt(0, blink, FALLING);
}

void loop()
{
digitalWrite(pin, state);
if(state==HIGH){
key=wheelKey();
if(key>=0){
Serial.print("wheelKey:\t");
Serial.println(key,DEC);
}

key=keypad();
if(key>=0){
Serial.print("keypad:\t");
Serial.println(key,DEC);
}
state = LOW;
}
}

void blink()
{
state =HIGH;
}

上完代码了就该上效果图了。

那么有同学就会想，上完效果图之后，你还能上什么呢？
没错，哥上完效果图还可以上的就是

当，当，当，当，当.......

邓维安 发表于 2012-9-17 15:53:26

附上摸摸板的库文件

迷你强 发表于 2012-9-17 17:30:27

{:soso_e136:}貌似是大神那

Randy 发表于 2012-9-17 17:44:23

邓大哥一直都是这样的大神，膜拜了。。。

friskit 发表于 2012-9-18 07:02:58

话说上面那个cad的软件是啥？为啥还有dfrobot的模块。。。

darkorigin 发表于 2012-9-18 22:38:09

friskit 发表于 2012-9-18 07:02 static/image/common/back.gif
话说上面那个cad的软件是啥？为啥还有dfrobot的模块。。。

CAD应该是计算机辅助设计难道说的是AOTO CAD ?
DFROBOT 是一个成品ARDUINO的品牌，国内做的很多，哈尔滨的一个大学的一帮人做的，配件很全面~~

friskit 发表于 2012-9-21 23:14:58

darkorigin 发表于 2012-9-18 22:38 static/image/common/back.gif
CAD应该是计算机辅助设计难道说的是AOTO CAD ?
DFROBOT 是一个成品ARDUINO的品牌，国内做的很多，哈尔滨 ...

呃。。我是在说那个画图的软件是啥……dfrobot的模型都有……

Keke 发表于 2014-1-12 16:04:25

邓大神，斗胆改了你的程序（mpr121.h)，现在的arduino已经不在支持WProgram.h，WConstants.h，而且wire里面也改为了read和write，否则编译不过了。
我一直没有搞清楚这个wheelKey()是干什么的，能否解释一下，实在不想去看datasheet了，万谢，万谢！/*
MPR121.h
MPR121 WhellPad Example Code

by:Waiman Zhao
Mail:[email protected]
created on: 11/2/14
license: CC-SA 3.0

By Keke Zhou
Mail: [email protected]
Modified on: Jan 12th, 2014

Hardware: 3.3V Arduino Pro Mini
      SDA -> A4
      SCL -> A5
      IRQ -> D2
*/

#include <Wire.h>
#include <Arduino.h>

#define MPR121 0x5B // ADD pin is Vcc So address is 0x5B

// MPR121 Register Defines
#define E0BV 0x1E
#define E1BV 0x1F
#define E2BV 0x20
#define E3BV 0x21
#define E4BV 0x22
#define E5BV 0x23
#define E6BV 0x24
#define E7BV 0x25
#define E8BV 0x26
#define E9BV 0x27
#define E10BV 0x28
#define E11BV 0x29
#define E12BV 0x2A

#define MHD_R 0x2B
#define NHD_R 0x2C
#define NCL_R 0x2D
#define FDL_R 0x2E
#define MHD_F 0x2F
#define NHD_F 0x30
#define NCL_F 0x31
#define FDL_F 0x32

#define ELE0_T 0x41
#define ELE0_R 0x42
#define ELE1_T 0x43
#define ELE1_R 0x44
#define ELE2_T 0x45
#define ELE2_R 0x46
#define ELE3_T 0x47
#define ELE3_R 0x48
#define ELE4_T 0x49
#define ELE4_R 0x4A
#define ELE5_T 0x4B
#define ELE5_R 0x4C
#define ELE6_T 0x4D
#define ELE6_R 0x4E
#define ELE7_T 0x4F
#define ELE7_R 0x50
#define ELE8_T 0x51
#define ELE8_R 0x52
#define ELE9_T 0x53
#define ELE9_R 0x54
#define ELE10_T 0x55
#define ELE10_R 0x56
#define ELE11_T 0x57
#define ELE11_R 0x58

#define AFE1_CFG 0x5C
#define AFE2_CFG 0x5D
#define ELE_CFG 0x5E

#define GPIO_CTRL0 0x73
#define GPIO_CTRL1 0x74
#define GPIO_DATA 0x75
#define GPIO_DIR 0x76
#define GPIO_EN 0x77
#define GPIO_SET 0x78
#define GPIO_CLEAR 0x79
#define GPIO_TOGGLE 0x7A

#define ATO_CFG0 0x7B
#define ATO_CFGU 0x7D
#define ATO_CFGL 0x7E
#define ATO_CFGT 0x7F
#define RES_CF       0x80

// Global Constants //隔住阻焊层
#define TOU_THRESH 0x06
#define REL_THRESH 0x03
#define START_BV 0x90
// Global Constants //隔住0.5mm
//#define TOU_THRESH 0x06
//#define REL_THRESH 0x03

void mpr121Write(uint8_t reg,uint8_t data){
Wire.beginTransmission((uint8_t)MPR121);
Wire.write(reg);
Wire.write(data);
Wire.endTransmission();
}

void mpr121Read(uint8_t reg,uint8_t length,uint8_t *ReturnData)
{
Wire.beginTransmission(MPR121);
Wire.write(reg);
//Wire.endTransmission();
Wire.requestFrom((uint8_t)MPR121, length);
uint8_t i=0;
while(Wire.available()) // slave may send less than requested
{
ReturnData = Wire.read(); // receive a byte as character
i++;
}
}

int readTouch()
{
Wire.requestFrom((uint8_t)MPR121,(uint8_t)2);
uint8_t a,b;
if(Wire.available()>=2) // slave may send less than requested
{
a = Wire.read(); // receive a byte as character
b = Wire.read();
return (a | (int)(b<<8));
}else
{
return 0;
}
}

void mpr121QuickConfig(void){
// STOP
mpr121Write(ELE_CFG, 0x00);
   mpr121Write(RES_CF, 0X63);
   delay(10);
// Section A
// This group controls filtering when data is > baseline.
mpr121Write(MHD_R, 0x01);
mpr121Write(NHD_R, 0x01);
mpr121Write(NCL_R, 0x00);
mpr121Write(FDL_R, 0x00);

// Section B
// This group controls filtering when data is < baseline.
mpr121Write(MHD_F, 0x01);
mpr121Write(NHD_F, 0x01);
mpr121Write(NCL_F, 0xFF);
mpr121Write(FDL_F, 0x02);

// Section C
// This group sets touch and release thresholds for each electrode
mpr121Write(ELE0_T, TOU_THRESH);
mpr121Write(ELE0_R, REL_THRESH);
mpr121Write(ELE1_T, TOU_THRESH);
mpr121Write(ELE1_R, REL_THRESH);
mpr121Write(ELE2_T, TOU_THRESH);
mpr121Write(ELE2_R, REL_THRESH);
mpr121Write(ELE3_T, TOU_THRESH);
mpr121Write(ELE3_R, REL_THRESH);
mpr121Write(ELE4_T, TOU_THRESH);
mpr121Write(ELE4_R, REL_THRESH);
mpr121Write(ELE5_T, TOU_THRESH);
mpr121Write(ELE5_R, REL_THRESH);
mpr121Write(ELE6_T, TOU_THRESH);
mpr121Write(ELE6_R, REL_THRESH);
mpr121Write(ELE7_T, TOU_THRESH);
mpr121Write(ELE7_R, REL_THRESH);
mpr121Write(ELE8_T, TOU_THRESH);
mpr121Write(ELE8_R, REL_THRESH);
mpr121Write(ELE9_T, TOU_THRESH);
mpr121Write(ELE9_R, REL_THRESH);
mpr121Write(ELE10_T, TOU_THRESH);
mpr121Write(ELE10_R, REL_THRESH);
mpr121Write(ELE11_T, TOU_THRESH);
mpr121Write(ELE11_R, REL_THRESH);

// Section D
// Set the Filter Configuration
// Set ESI2
mpr121Write(AFE1_CFG, 0x10);
//AFE配置1 （默认=0x10）
// 一级采样FFI:00-6次
// 充放电电流CDC:100000 - 32uA
mpr121Write(AFE2_CFG, 0x04);
//AFE配置2 （默认=0x24）
// 充电时间CDT:010 - 1us
// 二级采样SFI:00 - 4次
// 二级采样间隔ESI:100 - 16ms

// Section E
// Electrode Configuration
// Enable 6 Electrodes and set to run mode
// Set ELE_CFG to 0x00 to return to standby mode
mpr121Write(ELE_CFG, 0x8C); // Enables all 12 Electrodes

//AFE配置1
// CL
// ELEPROX
// ELE:
// Section F
// Enable Auto Config and auto Reconfig
/*mpr121Write(ATO_CFG0, 0x0B);
mpr121Write(ATO_CFGU, 0xC9); // USL = (Vdd-0.7)/vdd*256 = 0xC9 @3.3V mpr121Write(ATO_CFGL, 0x82); // LSL = 0.65*USL = 0x82 @3.3V
mpr121Write(ATO_CFGT, 0xB5);*/ // Target = 0.9*USL = 0xB5 @3.3V
}

int8_t wheelKey(void)
{
   switch(readTouch())
   {
case 0x0001:
return 1;
break;
case 0x0003:
return 2;
break;
case 0x0002:
return 3;
break;
case 0x0006:
return 4;
break;
case 0x0004:
return 5;
break;
case 0x000C:
return 6;
break;
case 0x0008:
return 7;
break;
case 0x0018:
return 8;
break;
case 0x0010:
return 9;
break;
case 0x0030:
return 10;
break;
case 0x0020:
return 11;
break;
case 0x0060:
return 12;
break;
case 0x0040:
return 13;
break;
case 0x00C0:
return 14;
break;
case 0x0080:
return 15;
break;
case 0x0081:
return 16;
break;
default:
return -1;
break;
   }
}

int8_t keypad(void)
{
   switch(readTouch())
   {
case 0x0001:
return 1;
break;
case 0x0002:
return 4;
break;
case 0x0004:
return 7;
break;
case 0x0008:
return 11;
break;
case 0x0010:
return 2;
break;
case 0x0020:
return 5;
break;
case 0x0040:
return 8;
break;
case 0x0080:
return 0;
break;
case 0x0100:
return 3;
break;
case 0x0200:
return 6;
break;
case 0x0400:
return 9;
break;
case 0x0800:
return 12;
break;
default:
return -1;
break;
   }
}

邓维安 发表于 2014-2-13 09:24:36

Keke 发表于 2014-1-12 16:04 static/image/common/back.gif
邓大神，斗胆改了你的程序（mpr121.h)，现在的arduino已经不在支持WProgram.h，WConstants.h，而且wire里面 ...

wheelKey()函数，就是你做按键滑动效果的参考值，它是由一连串的触发感应到的值，不是固定的一个值，我是这么理解的。

Keke 发表于 2014-2-14 09:07:06

邓维安发表于 2014-2-13 09:24 static/image/common/back.gif
wheelKey()函数，就是你做按键滑动效果的参考值，它是由一连串的触发感应到的值，不是固定的一个值，我是 ...

wheelkey和keypad两个函数连续调用，如果keypad读出来的是按键标示，那第一个wheelkey究竟读出的值具体有什么含义呢？你所说的这个滑动效果参考值究竟是什么呢？

邓维安 发表于 2014-2-17 08:20:27

Keke 发表于 2014-2-14 09:07 static/image/common/back.gif
wheelkey和keypad两个函数连续调用，如果keypad读出来的是按键标示，那第一个wheelkey究竟读出的值具体有 ...

keypad和wheelkey都是读按键值，你可以这样理解，keypad定义的是单键触摸的值，wheelkey定义是两个键同时触摸的值。这么简单的问题，你要自已看啊。要自已动手去做，脑袋去想，才能解决疑问。

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触摸—capacitive touch