main.cpp

00001 #include "mbed.h"
00002 #include "TSISensor.h"
00003 
00004 //Lab 5 part 2
00005 
00006 Serial pc(USBTX, USBRX); // tx, rx
00007 PwmOut redLED(LED_RED);
00008 PwmOut greenLED(LED_GREEN);
00009 TSISensor tsi;
00010 Timer t;
00011 
00012 enum pos{neutral, lo, li, ri, ro};
00013 
00014 Thread green ; // thread for green LED
00015 Thread red ; // thread for red LED
00016 
00017 # define lout 0x01   
00018 # define lin 0x02
00019 # define rin 0x04
00020 # define rout 0x08  
00021 EventFlags signals;  
00022 volatile uint32_t flags_red;
00023 volatile uint32_t flags_green;
00024 
00025 void changebrightnessred() {  // method to run in thread
00026     float i=0;
00027     while (true) {
00028         signals.wait_any(lin,osWaitForever,false);//Run thread indefinitely after left is is pressed
00029         flags_red=signals.wait_any(lout|rout,osWaitForever,true);
00030         if (flags_red==3){//If left out is pressed, less brightness
00031             if (i!=0) i--;
00032         }
00033         if (flags_red==10){//If right out is pressed, more brightness
00034             if (i!=9) i++;
00035         }
00036         signals.clear(lout); 
00037         signals.clear(rout);
00038         //pc.printf("flags_red: %d, red: %f   \n ",flags_red, i);
00039         redLED= 1-i/10;
00040     }
00041 }
00042 
00043 void changebrightnessgreen() {  // method to run in thread
00044     float i=0;
00045     while (true) {
00046         signals.wait_any(rin,osWaitForever,false);//Run indefinitely after right in pressed
00047         flags_green=signals.wait_any(lout|rout,osWaitForever,true);
00048         if (flags_green==5){//Left out less brightness
00049             if (i!=0) i--;
00050         }
00051         if (flags_green==12){//Right out more brightness
00052             if (i!=9) i++;
00053         }
00054         signals.clear(lout); 
00055         signals.clear(rout);
00056         //pc.printf("flags_green: %d,  green: %f \n",flags_green,  i);
00057         greenLED= 1-i/10;
00058     }
00059 }
00060 
00061 int main(void) {
00062     redLED = true ; // turn off 
00063     greenLED = true ; // turn off 
00064     red.start(changebrightnessgreen) ; // start the red thread
00065     green.start(changebrightnessred) ; // start the green thread
00066     int pos=neutral;
00067     while (true) {
00068         uint8_t d = tsi.readDistance() ;  // Distance is between 0 and 39
00069                                           // When no touch --> 0
00070                                           // Left --> low value  Right --> high value
00071         switch (pos){
00072             case neutral:
00073                 if (d>3 && d<9){pos=lo; signals.set(lout); t.start();}    
00074                 if (d>13 && d<19){pos=li; signals.set(lin); signals.clear(rin);} //Select LED
00075                 if (d>23 && d<29){pos=ri; signals.set(rin);signals.clear(lin);} //Select LED
00076                 if (d>33){pos=ro; signals.set(rout); t.start();} 
00077             break;
00078             case lo:
00079                 if (t.read()>1) {signals.set(lout); t.reset();}//Repeat event after 1 second
00080                 if (d<3 || d>9) {pos=neutral; t.reset(); t.stop();}
00081             break;
00082             case li:
00083                 if (d<13 || d>19) {pos=neutral; }
00084             break;
00085             case ri:
00086                 if (d<23 || d>29) {pos=neutral; }
00087             break;
00088             case ro:
00089                 if (t.read()>1) {signals.set(rout);t.reset();}//repeat event after 1 second
00090                 if (d<33) {pos=neutral; t.reset(); t.stop();}
00091             break;
00092         }
00093         //pc.printf("%d, position: %d", d, pos) ;  
00094         //pc.putc(' ') ;
00095         ThisThread::sleep_for(50) ; 
00096         }
00097 }