scolor_TCS3200.cpp

00001 #include "mbed.h"
00002 #include "scolor_TCS3200.h"
00003 
00004 
00005 scolor_TCS3200::scolor_TCS3200(PinName s0, PinName s1, PinName s2, PinName s3, PinName s_in) : 
00006 _s0(s0), _s1(s1), _s2(s2), _s3(s3), _s_in(s_in) 
00007 {
00008     SetMode(SCALE_100);
00009 
00010 };
00011  
00012 
00013 long scolor_TCS3200::ReadRed()   { _s2=0;  _s3=0; return pulsewidth();}
00014 long scolor_TCS3200::ReadBlue()  { _s2=0;  _s3=1; return pulsewidth();}
00015 long scolor_TCS3200::ReadClear() { _s2=1;  _s3=0; return pulsewidth();}
00016 long scolor_TCS3200::ReadGreen() { _s2=1;  _s3=1; return pulsewidth();}
00017 
00018 void scolor_TCS3200::SetMode(uint8_t mode) {
00019     switch (mode){
00020         case SCALE_100:  _s0= 1; _s1=1; break;
00021         case SCALE_20:   _s0=1 ; _s1=0; break;
00022         case SCALE_2:    _s0=0 ; _s1=1; break;
00023         case POWER_DOWN: _s0=0 ; _s1=0; break;
00024     } 
00025 };
00026  
00027 long  scolor_TCS3200::pulsewidth() {
00028     while(!_s_in);
00029     timer.start();
00030     while(_s_in);
00031     timer.stop();
00032     float pulsewidth_v = timer.read_us();
00033     timer.reset();
00034     return pulsewidth_v;
00035 };
00036             
00037