main.cpp

00001 /*
00002  *  LPC1114_5110_PIR
00003  *
00004  *  Created on: Dec 26, 2014
00005  *      Author: bundgus
00006  *
00007  *  Demonstrates the use of the LPC1114_Deep_Power_Down library with the NOKIA_5110 library
00008  */
00009 
00010 #include "mbed.h"
00011 #include "DeepPowerDown.h"
00012 #include "NOKIA_5110.h"
00013 #include <string>
00014 
00015 #define startup_countdown 10
00016 
00017 // high-level hardware interfaces
00018 DeepPowerDown pd;
00019 DigitalOut backlight(dp18, 0);
00020 LcdPins myLcdPins = { dp2, NC, dp6, dp26, dp25, dp24 };  // mosi, miso, sclk, dc, sce, rst
00021 NokiaLcd myLcd( myLcdPins );
00022 AnalogIn vref(dp9);
00023 AnalogIn vbat(dp10);
00024 DigitalIn personPIR(dp11);
00025 
00026 void startup()
00027 {
00028     // Turn off LCD Backlight
00029     backlight = 0;
00030 
00031     // Start the LCD
00032     myLcd.InitLcd();
00033     myLcd.ClearLcdMem();
00034 }
00035 
00036 void shutdown()
00037 {
00038     myLcd.ShutdownLcd();
00039     backlight = 0;
00040     pd.powerDown();
00041 }
00042 
00043 void s_firstRun()
00044 {
00045     pd.setGPREG3(1); // set next startup state to motionWake
00046     myLcd.SetXY(0,2);
00047     myLcd.DrawString("   Arming in  ");
00048 
00049     char cd_c[14];
00050 
00051     for (int cd = startup_countdown; cd>0 ; cd--) {
00052         myLcd.SetXY(0,3);
00053         myLcd.DrawString("      ");
00054         if (cd < 10) {
00055             myLcd.DrawString("0");
00056         }
00057         sprintf (cd_c, "%ld", cd);
00058         myLcd.DrawString(cd_c);
00059         myLcd.SetXY(0,4);
00060         myLcd.DrawString("   seconds    ");
00061         wait_ms(1000);
00062     }
00063 }
00064 
00065 void s_motionWake()
00066 {
00067 
00068     // check a few times to make sure there isn't a delay with the person PIR after the dog PIR is triggered
00069     int persondetected = 3;
00070     while (persondetected > 0) {
00071         if (personPIR.read() == 1) {
00072             break;
00073         }
00074         wait_ms(500);
00075         persondetected --;
00076     }
00077 
00078     myLcd.SetXY(0,0);
00079     if (persondetected > 0) {
00080         myLcd.DrawString("    PERSON");
00081         pd.setGPREG1(pd.getGPREG1() + 1);
00082     } else {
00083         myLcd.DrawString("     DOG");
00084         pd.setGPREG0(pd.getGPREG0() + 1);
00085     }
00086 
00087     unsigned int dogct = pd.getGPREG0();
00088     unsigned int personct = pd.getGPREG1();
00089 
00090     myLcd.SetXY(0,1);
00091     myLcd.DrawString("   DETECTED   ");
00092     // buffer for gpr 0-4 register string values - 84 columns / 6 columns per char = 14
00093     char gpreg0_c[14];
00094 
00095     sprintf (gpreg0_c, "%ld", dogct);
00096     //myLcd.SetXY(42-((int)log10((float)dogct) + 1)*3,2);
00097     myLcd.SetXY(0,2);
00098     myLcd.DrawString("dog: ");
00099     myLcd.DrawString(gpreg0_c);
00100 
00101     sprintf (gpreg0_c, "%ld", personct);
00102     myLcd.SetXY(0,3);
00103     myLcd.DrawString("person: ");
00104     myLcd.DrawString(gpreg0_c);
00105 
00106     // analog reading for voltage reference
00107     sprintf (gpreg0_c, "%1.2f", 1.235/vref.read());
00108     myLcd.SetXY(0,5);
00109     myLcd.DrawString("battery: ");
00110     myLcd.DrawString(gpreg0_c);
00111     myLcd.DrawString("v");
00112 
00113     for (int i=0;i<50;i++){
00114     if (persondetected == 0) {
00115     backlight = !backlight;
00116     }
00117     wait_ms(100);
00118     }
00119 
00120 }
00121 
00122 int main(void)
00123 {
00124     unsigned int GPREG3_i = pd.getGPREG3();  // GPREG3 = next application start state
00125 
00126     startup();
00127 
00128     switch(GPREG3_i) {
00129         case 0 :
00130             s_firstRun();
00131             break;
00132         case 1 :
00133             s_motionWake();
00134             break;
00135         default : /* Optional */
00136             break;// unknown state
00137     }
00138 
00139     shutdown();
00140 }
00141 
00142 
00143