Van der Pol limit cycle - 2D nonlinear attractor

Dependencies:   mbed

Committer:
JLS
Date:
Wed Feb 09 22:35:32 2011 +0000
Revision:
0:964911ed238a

        

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JLS 0:964911ed238a 1 //
JLS 0:964911ed238a 2 // TFT_4DGL is a class to drive 4D Systems TFT touch screens
JLS 0:964911ed238a 3 //
JLS 0:964911ed238a 4 // Copyright (C) <2010> Stephane ROCHON <stephane.rochon at free.fr>
JLS 0:964911ed238a 5 //
JLS 0:964911ed238a 6 // TFT_4DGL is free software: you can redistribute it and/or modify
JLS 0:964911ed238a 7 // it under the terms of the GNU General Public License as published by
JLS 0:964911ed238a 8 // the Free Software Foundation, either version 3 of the License, or
JLS 0:964911ed238a 9 // (at your option) any later version.
JLS 0:964911ed238a 10 //
JLS 0:964911ed238a 11 // TFT_4DGL is distributed in the hope that it will be useful,
JLS 0:964911ed238a 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
JLS 0:964911ed238a 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
JLS 0:964911ed238a 14 // GNU General Public License for more details.
JLS 0:964911ed238a 15 //
JLS 0:964911ed238a 16 // You should have received a copy of the GNU General Public License
JLS 0:964911ed238a 17 // along with TFT_4DGL. If not, see <http://www.gnu.org/licenses/>.
JLS 0:964911ed238a 18
JLS 0:964911ed238a 19 #include "mbed.h"
JLS 0:964911ed238a 20 #include "TFT_4DGL.h"
JLS 0:964911ed238a 21
JLS 0:964911ed238a 22 //******************************************************************************************************
JLS 0:964911ed238a 23 void TFT_4DGL :: touch_mode(char mode) { // Send touch mode (WAIT, PRESS, RELEASE or MOVE)
JLS 0:964911ed238a 24
JLS 0:964911ed238a 25 char command[2]= "";
JLS 0:964911ed238a 26
JLS 0:964911ed238a 27 command[0] = GETTOUCH;
JLS 0:964911ed238a 28 command[1] = mode;
JLS 0:964911ed238a 29
JLS 0:964911ed238a 30 writeCOMMAND(command, 2);
JLS 0:964911ed238a 31 }
JLS 0:964911ed238a 32
JLS 0:964911ed238a 33 //******************************************************************************************************
JLS 0:964911ed238a 34 void TFT_4DGL :: get_touch(int *x, int *y) { // Get the touch coordinates
JLS 0:964911ed238a 35
JLS 0:964911ed238a 36 char command[2] = "";
JLS 0:964911ed238a 37
JLS 0:964911ed238a 38 command[0] = GETTOUCH;
JLS 0:964911ed238a 39 command[1] = GETPOSITION;
JLS 0:964911ed238a 40
JLS 0:964911ed238a 41 getTOUCH(command, 2, x, y);
JLS 0:964911ed238a 42 }
JLS 0:964911ed238a 43
JLS 0:964911ed238a 44 //******************************************************************************************************
JLS 0:964911ed238a 45 int TFT_4DGL :: touch_status(void) { // Get the touch screen status
JLS 0:964911ed238a 46
JLS 0:964911ed238a 47 char command[2] = "";
JLS 0:964911ed238a 48
JLS 0:964911ed238a 49 command[0] = GETTOUCH;
JLS 0:964911ed238a 50 command[1] = STATUS;
JLS 0:964911ed238a 51
JLS 0:964911ed238a 52 return getSTATUS(command, 2);
JLS 0:964911ed238a 53 }
JLS 0:964911ed238a 54
JLS 0:964911ed238a 55
JLS 0:964911ed238a 56 //******************************************************************************************************
JLS 0:964911ed238a 57 void TFT_4DGL :: wait_touch(int delay) { // wait until touch within a delay in milliseconds
JLS 0:964911ed238a 58
JLS 0:964911ed238a 59 char command[3]= "";
JLS 0:964911ed238a 60
JLS 0:964911ed238a 61 command[0] = WAITTOUCH;
JLS 0:964911ed238a 62
JLS 0:964911ed238a 63 command[1] = (delay >> 8) & 0xFF;
JLS 0:964911ed238a 64 command[2] = delay & 0xFF;
JLS 0:964911ed238a 65
JLS 0:964911ed238a 66 writeCOMMAND(command, 3);
JLS 0:964911ed238a 67 }
JLS 0:964911ed238a 68
JLS 0:964911ed238a 69 //******************************************************************************************************
JLS 0:964911ed238a 70 void TFT_4DGL :: set_touch(int x1, int y1 , int x2, int y2) { // define touch area
JLS 0:964911ed238a 71
JLS 0:964911ed238a 72 char command[9]= "";
JLS 0:964911ed238a 73
JLS 0:964911ed238a 74 command[0] = SETTOUCH;
JLS 0:964911ed238a 75
JLS 0:964911ed238a 76 command[1] = (x1 >> 8) & 0xFF;
JLS 0:964911ed238a 77 command[2] = x1 & 0xFF;
JLS 0:964911ed238a 78
JLS 0:964911ed238a 79 command[3] = (y1 >> 8) & 0xFF;
JLS 0:964911ed238a 80 command[4] = y1 & 0xFF;
JLS 0:964911ed238a 81
JLS 0:964911ed238a 82 command[5] = (x2 >> 8) & 0xFF;
JLS 0:964911ed238a 83 command[6] = x2 & 0xFF;
JLS 0:964911ed238a 84
JLS 0:964911ed238a 85 command[7] = (y2 >> 8) & 0xFF;
JLS 0:964911ed238a 86 command[8] = y2 & 0xFF;
JLS 0:964911ed238a 87
JLS 0:964911ed238a 88 writeCOMMAND(command, 9);
JLS 0:964911ed238a 89 }
JLS 0:964911ed238a 90
JLS 0:964911ed238a 91 //******************************************************************************************************
JLS 0:964911ed238a 92 // There is no way to have the uLCD-32PT trigger an interrupt when touched.
JLS 0:964911ed238a 93 // This function polls the screen and waits for a touch to regiester
JLS 0:964911ed238a 94 //******************************************************************************************************
JLS 0:964911ed238a 95 void TFT_4DGL :: Pause_Until_Touch(int *x, int *y) { // Actually waits for a TouchScreen release!
JLS 0:964911ed238a 96
JLS 0:964911ed238a 97 char TouchStatus = 0; //Initalise the TouchStatus as 0 = no touch activity
JLS 0:964911ed238a 98 char command[2] = "";
JLS 0:964911ed238a 99
JLS 0:964911ed238a 100 do{
JLS 0:964911ed238a 101 TouchStatus = touch_status(); //Get the touchscreen status
JLS 0:964911ed238a 102 wait(0.1);
JLS 0:964911ed238a 103 }while (TouchStatus != 2);
JLS 0:964911ed238a 104
JLS 0:964911ed238a 105 command[0] = GETTOUCH;
JLS 0:964911ed238a 106 command[1] = GETPOSITION;
JLS 0:964911ed238a 107
JLS 0:964911ed238a 108 getTOUCH(command, 2, x, y);
JLS 0:964911ed238a 109 }