main.cpp

00001 //basiert auf dem DS1820-Example von Paul Staron
00002 
00003 #include "mbed.h"
00004 #include "DS1820.h"
00005 #include "LCD.h"
00006 
00007 DigitalOut led(LED1);
00008 lcd mylcd;
00009 
00010 #define DATA_PIN        PB_0  //Anschluss S
00011 //GND Anschluss -
00012 //3,3V mittlerer Anschluss
00013 
00014 #define MAX_PROBES      16
00015 DS1820* probe[MAX_PROBES];
00016 
00017 Timer t;
00018 
00019 int     DS;
00020 float   Temp[16]; 
00021 
00022 int main(){
00023     mylcd.clear();
00024     printf("\033[0m\033[2J\033[HInitialise...!\n\n");
00025 
00026     while (DS1820::unassignedProbe(DATA_PIN)) {
00027         probe[DS] = new DS1820(DATA_PIN);
00028         DS++;
00029         if (DS == MAX_PROBES) {
00030             break;
00031         }
00032     }
00033     
00034     if (!DS) {        
00035         printf("No Sensors found!\n\n");
00036         ThisThread::sleep_for(chrono::milliseconds(1000));
00037         NVIC_SystemReset();
00038     }
00039 
00040     // set each probe resolution, default is 12bit (750ms)
00041     probe[0]->setResolution(9);
00042 //    probe[0]->setResolution(10);
00043 //    probe[0]->setResolution(11);
00044 //    probe[0]->setResolution(12);
00045 //    probe[1]->setResolution(9);
00046 //    probe[2]->setResolution(10);
00047 
00048     t.start();
00049 
00050     while(1) {
00051         
00052         printf("\033[0m\033[2J\033[HDS Sensor data..\n\n");
00053 
00054         int DS_error = 0;
00055         for (int i = 0; i < DS; i++) {
00056             Temp[i] = probe[i]->temperature();
00057             if(Temp[i]==-1000) {
00058                 Temp[i] = probe[i]->temperature();  // get read temp again if error
00059                 DS_error++;
00060             }
00061 
00062             mylcd.cursorpos(0x40);
00063             mylcd.printf("%3.1f    ",Temp[i]);
00064         }
00065         printf("\nDS errors:  %d\n\n", DS_error);
00066 
00067         printf("Start conversion\n");
00068         t.reset();
00069         // don't wait for conversion, but do something that takes at least 750ms before reading the sensors
00070         //if(DS>0){probe[0]->convertTemperature(0, DS1820::all_devices);}
00071         
00072         // wait for conversion, can take up to 750ms(12 bit mode)
00073         if(DS>0){probe[0]->convertTemperature(1, DS1820::all_devices);}        
00074         
00075         printf("\nConvert process time: %0.6f Seconds\n", chrono::duration<float>(t.elapsed_time()).count());
00076 
00077         ThisThread::sleep_for(chrono::milliseconds(1000));
00078     }
00079 }