main.cpp

00001 //**********************
00002 // こて先温度計：Soldering Iron Tips Thermometer with MAX31855K
00003 //
00004 // こて先温度計シールド:Thermocouple Shield for Soldering Iron
00005 //      https://www.switch-science.com/catalog/2322/
00006 //      3.3V用にSJ1, SJ2をショートして使用しています
00007 //      It is the shield with MAX31855K and K-type thermocouple. 
00008 //  
00009 // Universal Embedded Board for LPC11U68 by HAPI-TechSolution
00010 //      https://www.switch-science.com/catalog/2316/
00011 //
00012 // I2C接続の小型LCD搭載ボード(3.3V版): 8x2 LCD display
00013 //      https://www.switch-science.com/catalog/1405/
00014 //      8x2 LCD with AQM0802 controller
00015 //
00016 //**********************
00017 #include "mbed.h"
00018 #include "AQM0802.h"
00019 #include "max31855.h"
00020 
00021 #define NEED_CONSOLE_OUTPUT 0
00022 #define NEED_LCD_OUTPUT 1
00023 
00024 #if NEED_CONSOLE_OUTPUT
00025 Serial  pc(USBTX, USBRX);
00026 #define PC(...) { pc.printf(__VA_ARGS__); }
00027 #else
00028 #define PC(...) /* nothing */
00029 #endif /* #if NEED_CONSOLE_OUTPUT */
00030 
00031 I2C i2c(SDA, SCL);
00032 SPI spi(P0_9, P0_8, P1_29);
00033 max31855 max1(spi, P0_2);
00034 
00035 #if NEED_LCD_OUTPUT
00036 AQM0802 lcd(i2c);
00037 #endif
00038 
00039 int main()
00040 {
00041     char msg1[10],msg2[10];
00042     float fvalue;
00043     float chiptemp;
00044     int faultCode;
00045 
00046     //Initialise chip (starts internal timer)
00047     max1.initialise();
00048     wait(2);
00049     
00050     sprintf(msg1,"Temp");
00051     fvalue = max1.read_temp();
00052     wait_ms(500);
00053         
00054     while(1){  
00055             fvalue = max1.read_temp();
00056             PC("%d\n",fvalue);
00057             
00058             if (fvalue > 2000.){
00059                 faultCode = fvalue - 2000;
00060                 if((faultCode & 4 ) != 0){
00061                     sprintf(msg2,"Short Vc");
00062                     PC("ERROR: Short to VCC");
00063                 }else if((faultCode & 2 ) != 0){
00064                     sprintf(msg2,"Short G ");
00065                     PC("ERROR: Short to GND");
00066                 }else if((faultCode & 1 ) != 0){
00067                     PC("ERROR: Open Circuit");
00068                     sprintf(msg2,"Open    ");
00069                 }
00070             } else {
00071                 sprintf(msg2,"%6.2f%cC",fvalue,0xf2);
00072             }
00073             
00074             chiptemp = max1.chipTemp * 0.25;
00075             // sprintf(msg1,"%6.2f%cC",chiptemp,0xf2);
00076             
00077             PC("%7.2f : %7.2f\n",fvalue, chiptemp);
00078       
00079 #if NEED_LCD_OUTPUT
00080             lcd.locate(0,0);
00081             lcd.print(msg1);
00082             lcd.locate(0,1);
00083             lcd.print(msg2);
00084 
00085 #endif
00086             wait_ms(500);
00087     }
00088 
00089 }