main.cpp

00001 #include "mbed.h"
00002 #include "uLCD_4D_Picaso.h"
00003 
00004 /**
00005 * Demo program for uLCD_4D_Picaso resistance touchscreen 
00006 * Simple Graphing Application on resistive touchscreen display
00007 * @version 1.0
00008 * @author Andrew McRae, Tianhao Li
00009 */
00010 // three pins are: TX   RX  RESET
00011 uLCD_4D_Picaso lcd(p28, p27, p30);
00012 //
00013 int main() {
00014     wait(1);
00015     // change the baudrate to improve or decrease the latency and plotting quality
00016     lcd.setbaudWait(Picaso::BAUD_600000);
00017     lcd.touch_Set(0);
00018     lcd.txt_Opacity(Picaso::OPAQUE);
00019     lcd.gfx_RectangleFilled(200, 0, 230, 30, Picaso::WHITE);
00020     lcd.gfx_RectangleFilled(0, 0, 30, 30, Picaso::WHITE);
00021     lcd.txt_MoveCursor(1, 1);
00022     lcd.putCH('E');
00023     int status = 0;
00024     int x = 0;
00025     int y = 0;
00026     int eraserActive = 0;
00027     int prevX, prevY;
00028     while(1) {
00029         status = lcd.touch_Get(0);
00030         if (status)
00031         {
00032             x = lcd.touch_Get(1);
00033             y = lcd.touch_Get(2);
00034             if (status == 1 && x >= 200 && y <= 30) {
00035                 // Clear screen
00036                 // Redraw eraser and clear screen button.
00037                 lcd.gfx_Cls();
00038                 lcd.gfx_RectangleFilled(200, 0, 230, 30, Picaso::WHITE);
00039                 lcd.gfx_RectangleFilled(0, 0, 30, 30, Picaso::WHITE);
00040                 lcd.txt_MoveCursor(0, 0);
00041                 lcd.putCH('E');
00042             } else if (status == 1 && x <= 40 && y <= 30) {
00043                   eraserActive = !eraserActive;
00044             } else {
00045                 if (eraserActive) {
00046                     lcd.gfx_RectangleFilled(x - 10, y - 10, x + 10, y + 10, Picaso::BLACK);
00047                 } else {
00048                     if (status == 1) {
00049                         prevX = x;
00050                         prevY = y;
00051                     }
00052 
00053                     // Moving, draw a continuous line until release event happen
00054                     lcd.gfx_Line(prevX, prevY, x, y, Picaso::WHITE);
00055                 }
00056             }    
00057 
00058             prevX = x;
00059             prevY = y;
00060    
00061         }    
00062     }
00063 }