[转载] [Arduino模块]TPA81 8Pixel热传感器
TPA81 8Pixel热传感器
电路示意：
http://image.ednchina.com/GROUP/IMAGES/8957283574_1359512664557.gif
代码示例：
/********************************************
* arduino example for TPA81 and LCD03 *
* TPA81 controlled by I2C *
* LCD03 controlled by serial *
* *
* By James Henderson 2012 *
********************************************/
#include <Wire.h>
#include <SoftwareSerial.h>
#define ADDRESS 0x68 // Address of TPA81
#define SOFTREG 0x00 // Byte for software version
#define AMBIANT 0x01 // Byte for ambiant temperature
#define LCD_RX 0x02 // Pin for rx
#define LCD_TX 0x03 // Pin for tx
#define LCD03_HIDE_CUR 0x04
#define LCD03_CLEAR 0x0C
#define LCD03_SET_CUR 0x02
#define LCD03_RETURN 0x0D
SoftwareSerial lcd_03 = SoftwareSerial(LCD_RX, LCD_TX);// Defines serial port for LCD03
int temperature[] = {0,0,0,0,0,0,0,0}; // Array to hold temperature data
void setup(){
lcd_03.begin(9600); // Starts software serial port for LCD03
Wire.begin();
delay(100); // Wait to make sure everything is powerd up
lcd_03.write(LCD03_CLEAR);
lcd_03.write(LCD03_HIDE_CUR);
byte software = getData(SOFTREG); // Get software version
lcd_03.print("TPA81 ExampleV:");
lcd_03.print(software); // Print software version to the screen
}
void loop(){
for(int i = 0; i < 8; i++){ // Loops and stores temperature data in array
temperature = getData(i+2);
}
lcd_03.write(LCD03_SET_CUR);
lcd_03.write(21); // Moves cursor to space 21
for(int x = 0; x < 8; x++){ // Loop prints each member of temperature to LCD03 followed by a space
if(x==4) // If x is 4 perform a carriage return to format the results on the LCD03 for easier reading
lcd_03.write(LCD03_RETURN);
lcd_03.print(temperature);
lcd_03.print(" ");
delay(50); // Wait befor printing next value to give time for everything to be sent
}
lcd_03.write(LCD03_RETURN);
int ambiantTemp = getData(AMBIANT); // Get reading of ambiant temperature and print to LCD03 screen
lcd_03.print("Ambiant: ");
lcd_03.print(ambiantTemp);
}
byte getData(byte reg){ // Function to receive one byte of data from TPA81
Wire.beginTransmission(ADDRESS); // Begin communication with TPA81
Wire.write(reg); // Send reg to TPA81
Wire.endTransmission();
Wire.requestFrom(ADDRESS, 1); // Request 1 byte
while(Wire.available() < 1); // Wait for byte to arrive
byte data = Wire.read(); // Get byte
return(data); // return byte
}
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