Ad7298 arduino 模块

liubh5701023

参考inel 伽利略的AD模块，做了一款兼容Arduino的AD模块，有图有例程。

sacq12

不错。就是例程的文字确实看不清了。

奋斗哥

楼主把例程的文本文档发一下吧，截图看不清楚呢！

liubh5701023

单个通道的读写程序：

1. #include <SPI.h>
   
2. 
   
3. unsigned char  receiveBuffer[2] = {0, 0}; //receive data buffer
   
4. unsigned short value = 0; //
   
5. unsigned short convData;//conversion data,remove the hight 4 bits for channel inforamtion
   
6. float volts = 0;   //displayed voltage
   
7. unsigned char ch; //voltage Channel
   
8. float vRef=2.5;
   
9. char   tempString [12]  = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
   
10. 
    
11. #define CS 10
    
12. 
    
13. void setup() {
    
14. //for debug
    
15.   Serial.begin(9600);
    
16. 
    
17.   //set up the  SPI protocol ref to the AD7298 datasheet
    
18.   SPI.setBitOrder(MSBFIRST);
    
19.   SPI.setDataMode(SPI_MODE2);
    
20.   SPI.begin();   
    
21. }
    
22. 
    
23. void loop() {
    
24.    
    
25.   //the 1st cycle,write cycle
    
26.   digitalWrite(CS, LOW);
    
27.   SPI.transfer(0xA0); //the first Byte  
    
28.   SPI.transfer(0x00); //the last byte
    
29.   digitalWrite(CS,HIGH);
    
30.   delay(10);
    
31.    
    
32. //the 2nd cycle,wait for conversion cycle
    
33.   digitalWrite(CS, LOW);
    
34.   SPI.transfer(00);
    
35.   SPI.transfer(00);
    
36.   digitalWrite(CS,HIGH);
    
37.   delay(10);
    
38.    //the 3rd cycle,read voltage from the assigned channel in the write cyle
    
39.      
    
40.   digitalWrite(CS, LOW);
    
41.   receiveBuffer[0]=SPI.transfer(00);
    
42.   receiveBuffer[1]=SPI.transfer(00);
    
43.   digitalWrite(CS,HIGH);
    
44.   //analysis the data for display
    
45.   value = ((unsigned short)receiveBuffer[0] << 8) + receiveBuffer[1];
    
46.   convData = value & 0x0FFF; //adc raw data value
    
47.   ch = (value & 0xF000) >> 12; //adc channel raw data
    
48.   volts = 2*((float)convData * vRef) / 4096; //
    
49.   
    
50.   Serial.print("rawdata=");
    
51.   itoa(convData, tempString, 10);
    
52.   Serial.println(tempString);
    
53.   
    
54.   Serial.print("THE Vin0 input Voltage is:");
    
55.   Serial.print(volts,4);
    
56.   
    
57.   Serial.println('\n');
    
58.   delay(1000);
    
59. }
    
60. 
    
61. 
    

复制代码

liubh5701023

Board layout 截图

w932443004

板子上绿色的是个高大上的跳线帽么？

liubh5701023

是为了兼容3.3v  5v spi接口