小白求助~~~touch sensor不懂io口怎么接~~

zcy19941015

rt，就是左上角的模块~~~有vcc GND SDA SCL四个针脚
可是我上网找了一些例程，代码搞到了，，可是发现真的搞不懂这个模块应该接在arduino的哪几个io口上啊。。。。
lz用的arduino uno，跪求大神给讲讲代码TAT
例程网址在此：
http://www.alsrobot.cn/article-157.html
大神教我把这个例程跑通了就可以了~~~！！！跪谢好心大神~~~！！！
例程代码在此：

1. #include <mpr121.h>
   
2. #include <i2c.h>
   
3. 
   
4. #define MPR121_R    0xB5
   
5. #define MPR121_W    0xB4
   
6. #define MPR121addr  0x5a
   
7. 
   
8. int StateOfTouch1 = 0;
   
9. int StateOfTouch2 = 0;
   
10. int StateOfTouch3 = 0;
    
11. int StateOfTouch4 = 0;
    
12. int irqpin        = 2;
    
13. uint16_t touchstatus;
    
14. volatile int GetTouchSignal = 0;
    
15. unsigned char reg = 0;
    
16. unsigned char status1 =0;
    
17. unsigned char status2 =0;
    
18. long previousMillis = 0;
    
19. long interval = 100;
    
20. 
    
21. void setup()
    
22. {
    
23.   Serial.begin(9600);
    
24.   DDRC |= 0b00010011;
    
25.   PORTC = 0b00110000;
    
26.   i2cInit();
    
27.   Serial.println("setting device up..");
    
28.   delay(100);
    
29.   mpr121QuickConfig();
    
30. }
    
31. 
    
32. void loop()
    
33. {
    
34.   unsigned char MPR_Query=0;
    
35.   unsigned long currentMillis = millis();
    
36.   if(currentMillis - previousMillis > interval)
    
37.   {
    
38.     previousMillis = currentMillis;
    
39.     Read_MPR121();
    
40.   }
    
41.   if (Serial.available()>0)
    
42.   {
    
43.     Serial.println("Get a command form PC..");
    
44.     reg = Serial.read();
    
45.     Serial.print("Quiry the Reg of ");
    
46.     Serial.println(reg,BIN);
    
47.     MPR_Query = mpr121Read(reg);
    
48.     Serial.print("the reg is = 0x");
    
49.     Serial.println(MPR_Query,HEX);
    
50.   }
    
51.   delayMicroseconds(1000);
    
52. }
    
53. 
    
54. void Read_MPR121()
    
55. {
    
56.   status1=mpr121Read(0x00);
    
57.   status2=mpr121Read(0x01);
    
58.   CheckStatus();  
    
59. }
    
60. 
    
61. void  CheckStatus()
    
62. {
    
63.   if ((status1&0x01)==0x01)
    
64.   {
    
65.     StateOfTouch1 =1;
    
66.   }
    
67.   else
    
68.   {
    
69.     if (StateOfTouch1 ==1)
    
70.     {
    
71.       Serial.println("channel 0 has pressed..");
    
72.       digitalWrite(10, HIGH);
    
73.       digitalWrite(11, LOW);
    
74.       digitalWrite(12, LOW);
    
75.       digitalWrite(13, LOW);
    
76.       StateOfTouch1 =0;
    
77.     }
    
78.   }
    
79.   if ((status1&0x02)==0x02)
    
80.   {
    
81.     StateOfTouch2 =1;
    
82.   }
    
83.   else
    
84.   {
    
85.     if (StateOfTouch2 ==1)
    
86.     {
    
87.       Serial.println("channel 1 has pressed..");
    
88.       digitalWrite(10, LOW);
    
89.       digitalWrite(11, HIGH);
    
90.       digitalWrite(12, LOW);
    
91.       digitalWrite(13, LOW);
    
92.       StateOfTouch2 =0;
    
93.     }
    
94.   }
    
95.   if ((status1&0x04)==0x04)
    
96.   {
    
97.     StateOfTouch3 =1;
    
98.   }
    
99.   else
    
100.   {
     
101.     if (StateOfTouch3 ==1)
     
102.     {
     
103.       Serial.println("channel 2 has pressed..");
     
104.       digitalWrite(10, LOW);
     
105.       digitalWrite(11, LOW);
     
106.       digitalWrite(12, HIGH);
     
107.       digitalWrite(13, LOW);
     
108.       StateOfTouch3 =0;
     
109.     }
     
110.   }
     
111.   if ((status1&0x08)==0x08)
     
112.   {
     
113.     StateOfTouch4 =1;
     
114.   }
     
115.   else
     
116.   {
     
117.     if (StateOfTouch4 ==1)
     
118.     {
     
119.       Serial.println("channel 3 has pressed..");
     
120.       digitalWrite(10, LOW);
     
121.       digitalWrite(11, LOW);
     
122.       digitalWrite(12, LOW);
     
123.       digitalWrite(13, HIGH);
     
124.       StateOfTouch4 =0;
     
125.     }
     
126.   }
     
127. }
     
128. 
     
129. byte mpr121Read(uint8_t address)
     
130. {
     
131.   byte data;
     
132.   i2cSendStart();
     
133.   i2cWaitForComplete();
     
134.   i2cSendByte(MPR121_W);
     
135.   i2cWaitForComplete();
     
136.   i2cSendByte(address);
     
137.   i2cWaitForComplete();
     
138.   i2cSendStart();
     
139.   i2cSendByte(MPR121_R);
     
140.   i2cWaitForComplete();
     
141.   i2cReceiveByte(TRUE);
     
142.   i2cWaitForComplete();
     
143.   data = i2cGetReceivedByte();
     
144.   i2cWaitForComplete();
     
145.   i2cSendStop();
     
146.   cbi(TWCR, TWEN);
     
147.   sbi(TWCR, TWEN);
     
148.   return data;
     
149. }
     
150. 
     
151. void mpr121Write(unsigned char address, unsigned char data)
     
152. {
     
153.   i2cSendStart();
     
154.   i2cWaitForComplete();
     
155.   i2cSendByte(MPR121_W);
     
156.   i2cWaitForComplete();
     
157.   i2cSendByte(address);
     
158.   i2cWaitForComplete();
     
159.   i2cSendByte(data);
     
160.   i2cWaitForComplete();
     
161.   i2cSendStop();
     
162. }
     
163. 
     
164. void mpr121QuickConfig(void)
     
165. {
     
166.   Serial.println("config MPR121..");
     
167.   mpr121Write(MHD_R, 0x01);
     
168.   mpr121Write(NHD_R, 0x01);
     
169.   mpr121Write(NCL_R, 0x00);
     
170.   mpr121Write(FDL_R, 0x00);
     
171.   mpr121Write(MHD_F, 0x01);
     
172.   mpr121Write(NHD_F, 0x01);
     
173.   mpr121Write(NCL_F, 0xFF);
     
174.   mpr121Write(FDL_F, 0x02);
     
175.   mpr121Write(ELE0_T, TOU_THRESH);
     
176.   mpr121Write(ELE0_R, REL_THRESH);
     
177.   mpr121Write(ELE1_T, TOU_THRESH);
     
178.   mpr121Write(ELE1_R, REL_THRESH);
     
179.   mpr121Write(ELE2_T, TOU_THRESH);
     
180.   mpr121Write(ELE2_R, REL_THRESH);
     
181.   mpr121Write(ELE3_T, TOU_THRESH);
     
182.   mpr121Write(ELE3_R, REL_THRESH);
     
183. 
     
184.   mpr121Write(ATO_CFGU, 0xC9);
     
185.   mpr121Write(ATO_CFGL, 0x82);
     
186.   mpr121Write(ATO_CFGT,0xb5);
     
187.   mpr121Write(ATO_CFG0, 0x1B);
     
188.   mpr121Write(ELE_CFG, 0x8c);
     
189.   Serial.println("config MPR121 Done!");
     
190. }
     
191. 
     
192. void  checkInterrupt(void)
     
193. {
     
194.   int IRQ =0;
     
195.   IRQ = digitalRead(irqpin);
     
196.   if(IRQ == 0)
     
197.   {
     
198.     GetTouchSignal=1;
     
199.   }
     
200.   else
     
201.   {
     
202.     GetTouchSignal=0;
     
203.   }
     
204. }

复制代码

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
我的SDA接了A4 SCL接了A5还是不行，大神看看是不是代码问题。。。。。

zcy19941015

现在的问题就是我搞不懂这个东西应该接在哪几个io口上，，，代码里也没写（或许我没看懂），也没有文字叙述，硬件连接图

Super169

Hardware i2c 的話 A5 -SCL, A4 - SDA

zcy19941015

Super169 发表于 2014-3-31 19:24
Hardware i2c 的話 A5 -SCL, A4 - SDA

额，还是不可以，是代码问题么

eddiewwm

irqpin = 2，
IRQ腳未接好，要接往Arduino 的 D2 接口。

zcy19941015

eddiewwm 发表于 2014-3-31 21:47
irqpin = 2，
IRQ腳未接好，要接往Arduino 的 D2 接口。

没有irq这个脚啊，，只有VCC GND SCL SDA

zcy19941015

eddiewwm 发表于 2014-3-31 21:47
irqpin = 2，
IRQ腳未接好，要接往Arduino 的 D2 接口。

接好了~~~谢谢~~

zcy19941015

eddiewwm 发表于 2014-3-31 21:47
irqpin = 2，
IRQ腳未接好，要接往Arduino 的 D2 接口。

~~接好了~~谢谢！