main.cpp

00001 //**********************
00002 // A/D Converter
00003 // MCP3425 sample for mbed
00004 //
00005 // Voltage=(Vin+)-(Vin-)
00006 // Voltage Range:-2.048V to 2.048V
00007 // Resolution:2.048V/0x7FFF=62.5uV, 16bits
00008 // Sampling Per Second
00009 // 240 SPS, 12bits
00010 //  60 SPS, 14bits
00011 //  15 SPS, 16bits (default)
00012 //
00013 // (C)Copyright 2014 All rights reserved by Y.Onodera
00014 // http://einstlab.web.fc2.com
00015 //**********************
00016 #include "mbed.h"
00017 #include "AQM0802.h"
00018 #include "MCP3425.h"
00019 
00020 #if defined(TARGET_LPC1768)
00021 I2C i2c(p28,p27);
00022 #endif
00023 // for TG-LPC11U35-501
00024 #if defined(TARGET_LPC11U35_501)
00025 I2C i2c(P0_5,P0_4);
00026 #endif
00027 // for Nucleo
00028 #if defined(TARGET_NUCLEO_F401RE)
00029 I2C i2c(D14,D15);
00030 #endif
00031 
00032 AQM0802 lcd(i2c);
00033 MCP3425 mcp3425(i2c);
00034 
00035 
00036 int main() {
00037     
00038     char msg[10];
00039     short a;
00040     float v;
00041 
00042     sprintf(msg,"MCP3425");
00043     lcd.locate(0,0);
00044     lcd.print(msg);
00045     wait(1);
00046       
00047     while(1) {
00048 
00049         a = mcp3425.get();
00050         sprintf(msg,"dat=%X",(unsigned short)a);
00051         lcd.locate(0,0);
00052         lcd.print(msg);
00053         v = (float)a*2.048/0x7FFF;
00054         sprintf(msg,"%f",v);
00055         lcd.locate(0,1);
00056         lcd.print(msg);
00057         wait(1);    // Do not exceed 15SPS with 16bits
00058     }
00059 
00060 }
00061