main.cpp

00001 #include "mbed.h"
00002 #include "SLCD.h"
00003 
00004 #define LEDON false
00005 #define LEDOFF true
00006 #define NUMBUTS 2
00007 #define LBUT PTC12  // port addresses for buttons
00008 #define RBUT PTC3
00009 #define BLINKTIME 0.5 // in seconds
00010 #define BUTTONTIME 0.2 // 
00011 #define LCDCHARLEN 20
00012 #define NUMMESS 2
00013 #define LRED "REDBUTTONPRESSED"
00014 #define LGREEN "GREENBUTTONPRESSED"
00015 #define PRED "RED\r\n"
00016 #define PGREEN "GREEN\r\n"
00017 #define PROGNAME "blink_kl46z_buttton LCD v2\r\n"
00018 
00019 // slightly more interesting blinky 140814 sc
00020 SLCD slcd; //define LCD display
00021 
00022 // Timer to elliminate wait() function
00023 Timer LEDTimer; // for blinking LEDs
00024 Timer ButtonTimer; // for reading button states
00025 
00026 bool ledState = LEDON;
00027 
00028 DigitalIn buttons[NUMBUTS] = {RBUT, LBUT};
00029 DigitalOut LEDs[NUMBUTS] = {LED_GREEN, LED_RED};
00030 Serial pc(USBTX, USBRX);// set up USB as communicationis to Host PC via USB connectons
00031 
00032 void allLEDsOff(){
00033     int i;
00034     for (i=0; i<NUMBUTS; i++){ 
00035         LEDs[i] = LEDOFF;    
00036     }
00037 }
00038  
00039 void LCDMess(char *lMess){
00040         slcd.Home();
00041         slcd.clear();
00042         slcd.printf(lMess);
00043 }
00044 
00045 void initialize_global_vars(){
00046     pc.printf(PROGNAME);
00047     // set up DAQ timers
00048     ButtonTimer.start();
00049     ButtonTimer.reset();
00050     LEDTimer.start();
00051     LEDTimer.reset();  
00052     allLEDsOff();
00053 } 
00054 // --------------------------------
00055  int main() {
00056     int i; 
00057     int currentLED = 0;
00058     char rMess[NUMMESS][LCDCHARLEN]={LGREEN, LRED}; // for LCD
00059     char pMess[NUMMESS][LCDCHARLEN]={PRED, PGREEN}; // for pc serial port
00060 
00061     initialize_global_vars(); //keep things organized
00062     LEDs[currentLED] = LEDON;
00063     LCDMess(rMess[currentLED]);
00064     pc.printf(pMess[currentLED]);
00065 // End of setup
00066     while(true) {
00067         if (ButtonTimer > BUTTONTIME){
00068             for (i=0; i<NUMBUTS; i++){ // index will be 0 or 1 
00069                 if(!buttons[i]) { 
00070                     allLEDsOff();  
00071                     LCDMess(rMess[i]);
00072                     pc.printf(pMess[i]); 
00073                     currentLED = i;
00074                 } // if ! buttons
00075             }// for loop to look at buttons
00076             ButtonTimer.reset();
00077         }
00078         if(LEDTimer.read() > BLINKTIME){
00079             LEDTimer.reset();               
00080             ledState = !ledState; // Flip the general state
00081             LEDs[currentLED] = ledState;
00082         }
00083     // Do other things here between times of reading and flashing
00084     }
00085 }