main.cpp

00001 #include "mbed.h"
00002 #include "7SegSRDriver.h"
00003 #include "TextLCD.h" //driver 1602 lcd screen
00004 
00005 #define pin_debug 0
00006 #if pin_debug
00007 DigitalOut pin8(P2_7),pin6(P1_24);
00008 Ticker pinFlip;
00009 #endif
00010 
00011 Timeout CalcRate;
00012 DigitalOut led1(P2_2);
00013 DigitalIn signal(P2_9),XFC(P2_8);;
00014 //InterruptIn flip(P1_21),flip1(P1_23);    in mbed P1_21 is defined to be LED1, connect LCD to 3V3, can't generate interrupt
00015 //InterruptIn flip(P2_8),flip1(P2_9); //flip XFC flip1 signal
00016 TextLCD lcd(P0_24, P0_25, P0_26, P0_3, P0_2,P1_0,TextLCD::LCD16x2); // rs, e, d4-d7
00017 int signalTotal,XFCTotal,sync_Pass,sync_Fail;
00018 int i,max; //used for dataToArry function
00019 int printArray[4];
00020 float dataToarray(float data);
00021 int sync_delay = 16;// sync delay micro seconds.
00022 void pinflip();
00023 //7 segment class definition,Data,Clock,latch
00024 SSegSRDriver display(P2_1,P0_7,P0_9, SSegSRDriver_COMN_CATHODE);
00025 
00026 
00027 void calcRate() {
00028     float rate = 0;
00029     int tempsignalTotal,temp_pass,temp_fail;
00030     int j =0;
00031     int LEDArray[4];
00032 #if pin_debug
00033     pinFlip.detach();
00034 #endif
00035     //put to temp value to ensure these values not change after this.
00036     tempsignalTotal =signalTotal;
00037     temp_pass = sync_Pass;
00038     temp_fail = sync_Fail;
00039     if(sync_Pass>0)
00040         rate = (float)temp_pass/(float)(temp_pass+temp_fail)*100;
00041     else
00042         rate = 0;
00043     i=max=0;
00044        lcd.cls();
00045     if (rate>50) {
00046         for (j= 0; j<=3; j++) //clear printArray buffer to 0
00047             printArray[j] = 0;
00048         dataToarray(rate);
00049         //lcd.printf("XFC: %6dHz\n",tempXFCTotal*2); //print XFC: 023000Hz,remeber I'm using one counter to trigger the count
00050         lcd.printf("Working\n"); //Don't show XFC message.
00051         lcd.printf("Sig: %6dHz\n",tempsignalTotal);//print Sig: 023000Hz
00052         j = max; //max is from dataToarray, global variable to index the lenth of the array
00053         //printf("The array to print is:");
00054         for (int a=0; a<=4; a++)
00055             display.clear();
00056         
00057         while (j<3) {
00058             //printf("%d",0);
00059             j++;
00060             for (int tempIndex = j; tempIndex>=1; tempIndex--)
00061                 printArray[tempIndex]=printArray[tempIndex-1];
00062             printArray[0] = 0;
00063         }
00064         for (j=0; (j<=3); j++) {
00065             //printf("%d ",printArray[j]);
00066             LEDArray[j]=printArray[j];
00067         }
00068         if (max>3) { //which means 100%
00069             display.write(LEDArray[3],false);
00070             display.write(LEDArray[2],true);
00071             display.write(LEDArray[1],false);
00072             display.write(LEDArray[0],false);
00073         } else {
00074             display.write(LEDArray[3],false);
00075             display.write(LEDArray[2],false);
00076             display.write(LEDArray[1],true);
00077             display.write(LEDArray[0],false);
00078         }
00079     }
00080     else{
00081       lcd.printf("Warning!\n"); //show warning message message.
00082       lcd.printf("No Sync signal\n");
00083     }
00084      signalTotal = sync_Pass=sync_Fail =0;
00085     CalcRate.attach(&calcRate,1.0);
00086     led1 = !led1;
00087     
00088 #if pin_debug
00089     pinFlip.attach_us(&pinflip,10); //the best speed is 100k/s
00090 #endif
00091 }
00092 #if pin_debug
00093 void pinflip() {
00094     pin8 = !pin8;
00095 }
00096 #endif
00097 float dataToarray(float data) {
00098     if (data>=0.1) {
00099         i++; //counter increase
00100         data = dataToarray(data/10)*10;
00101     }
00102 
00103     if (max<=i)
00104         //make sure max is the biggest number pointer
00105         max = i;
00106     float tempData;
00107     tempData = data*100;
00108     printArray[max-i] = (int)tempData;
00109     data = (tempData-printArray[max-i])/100;
00110     i--;
00111     return (data);
00112 
00113 
00114 }
00115 int main() {
00116     int tempSignal,tempXFC;
00117     //lcd.printf("XFC: 0Hz\n"); //initialize
00118     lcd.printf("Working\n"); //initialize
00119     lcd.printf("Sig: 0Hz\n");//The Sig: 0Hz
00120     //clear the led first
00121      for (int a=0; a<=4; a++)
00122             display.clear();
00123     signalTotal = sync_Pass=sync_Fail =0;
00124     tempSignal = tempXFC = 0;
00125     CalcRate.attach(&calcRate,1.0);
00126 #if pin_debug
00127     pin8 = pin6 =0;
00128     pinFlip.attach_us(&pinflip,10); //the best speed is 100k/s
00129 #endif
00130    
00131     while (1) {
00132         if(tempSignal!=signal)
00133         {
00134             tempSignal = signal;
00135             signalTotal++;
00136         }
00137         if(tempXFC!=XFC)
00138         {
00139             tempXFC = XFC;
00140             wait_us(sync_delay);
00141             if(tempSignal!=signal) //synchronized 
00142             {
00143                 tempSignal = signal;
00144                 signalTotal++;  
00145                 sync_Pass++;
00146             }
00147             else //didn't find sync signal
00148                 sync_Fail++;
00149         }
00150         wait_us(1);
00151         
00152         
00153 
00154 
00155     }
00156 
00157 }