main.cpp

00001 #include "mbed.h"
00002 #include "TextLCD.h"
00003 
00004 Serial pc(SERIAL_TX, SERIAL_RX); 
00005 AnalogIn button(A0);    // Init button (SELECT, LEFT, UP, DOWN, RIGHT)
00006 // LCD (RS, E, D4, D5, D6, D7);
00007 TextLCD lcd(D8, D9, D4, D5, D6, D7);
00008 PwmOut backlight(D10);  // Backlight LCD
00009 DigitalOut led(LED1);
00010 
00011 int main() {
00012     
00013     // Set backlight period and duty cycle 
00014     backlight.period(0.002);
00015     backlight = 1;
00016     
00017     
00018     lcd.cls();                      // Clear LCD
00019     lcd.locate(1,0);                // Set locate (1 row, 2 column)
00020     lcd.printf("LCD Key Shield");
00021     wait(1);
00022     
00023     int meas;
00024     
00025     while(1) {
00026         led = (led == 1) ? 0 : 1;
00027 
00028         meas = button.read() * 1000; // Read the analog input value (value from 0.0 to 1.0) and convert to int value (from 0 to 1000)
00029         
00030         lcd.cls();
00031         lcd.locate(0,0);
00032         lcd.printf("Press button");
00033         lcd.locate(0,1);
00034         
00035         if (meas < 50) { 
00036             lcd.printf("BUTTON: Right ");
00037             backlight = 0.5;        // Set 50% backlight 
00038         }
00039         else if (meas < 210) { 
00040             lcd.printf("BUTTON: Up");
00041             backlight = 1;          // Power ON backlight
00042         } 
00043         else if (meas < 460){ 
00044             lcd.printf("BUTTON: Down");
00045             backlight = 0;          // Power OFF backlight
00046         } 
00047         else if (meas < 720){ 
00048             lcd.printf("BUTTON: Left"); 
00049         } 
00050         else if (meas > 950){ 
00051             lcd.printf("BUTTON: Select");
00052         }
00053         pc.printf("BUTTON: %4d\n", meas);
00054         
00055         wait(0.1);
00056     }
00057 }