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TFT_4DGL_Touch.cpp@1:1ea2331f9cbe, 2010-12-26 (annotated)

Committer:
JLS
Date:
Sun Dec 26 19:53:45 2010 +0000
Revision:
1:1ea2331f9cbe
update

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JLS 1:1ea2331f9cbe 1 //
JLS 1:1ea2331f9cbe 2 // TFT_4DGL is a class to drive 4D Systems TFT touch screens
JLS 1:1ea2331f9cbe 3 //
JLS 1:1ea2331f9cbe 4 // Copyright (C) <2010> Stephane ROCHON <stephane.rochon at free.fr>
JLS 1:1ea2331f9cbe 5 //
JLS 1:1ea2331f9cbe 6 // TFT_4DGL is free software: you can redistribute it and/or modify
JLS 1:1ea2331f9cbe 7 // it under the terms of the GNU General Public License as published by
JLS 1:1ea2331f9cbe 8 // the Free Software Foundation, either version 3 of the License, or
JLS 1:1ea2331f9cbe 9 // (at your option) any later version.
JLS 1:1ea2331f9cbe 10 //
JLS 1:1ea2331f9cbe 11 // TFT_4DGL is distributed in the hope that it will be useful,
JLS 1:1ea2331f9cbe 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
JLS 1:1ea2331f9cbe 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
JLS 1:1ea2331f9cbe 14 // GNU General Public License for more details.
JLS 1:1ea2331f9cbe 15 //
JLS 1:1ea2331f9cbe 16 // You should have received a copy of the GNU General Public License
JLS 1:1ea2331f9cbe 17 // along with TFT_4DGL. If not, see <http://www.gnu.org/licenses/>.
JLS 1:1ea2331f9cbe 18
JLS 1:1ea2331f9cbe 19 #include "mbed.h"
JLS 1:1ea2331f9cbe 20 #include "TFT_4DGL.h"
JLS 1:1ea2331f9cbe 21
JLS 1:1ea2331f9cbe 22 //******************************************************************************************************
JLS 1:1ea2331f9cbe 23 void TFT_4DGL :: touch_mode(char mode) { // Send touch mode (WAIT, PRESS, RELEASE or MOVE)
JLS 1:1ea2331f9cbe 24
JLS 1:1ea2331f9cbe 25 char command[2]= "";
JLS 1:1ea2331f9cbe 26
JLS 1:1ea2331f9cbe 27 command[0] = GETTOUCH;
JLS 1:1ea2331f9cbe 28 command[1] = mode;
JLS 1:1ea2331f9cbe 29
JLS 1:1ea2331f9cbe 30 writeCOMMAND(command, 2);
JLS 1:1ea2331f9cbe 31 }
JLS 1:1ea2331f9cbe 32
JLS 1:1ea2331f9cbe 33 //******************************************************************************************************
JLS 1:1ea2331f9cbe 34 void TFT_4DGL :: get_touch(int *x, int *y) { // Get the touch coordinates
JLS 1:1ea2331f9cbe 35
JLS 1:1ea2331f9cbe 36 char command[2] = "";
JLS 1:1ea2331f9cbe 37
JLS 1:1ea2331f9cbe 38 command[0] = GETTOUCH;
JLS 1:1ea2331f9cbe 39 command[1] = GETPOSITION;
JLS 1:1ea2331f9cbe 40
JLS 1:1ea2331f9cbe 41 getTOUCH(command, 2, x, y);
JLS 1:1ea2331f9cbe 42 }
JLS 1:1ea2331f9cbe 43
JLS 1:1ea2331f9cbe 44 //******************************************************************************************************
JLS 1:1ea2331f9cbe 45 int TFT_4DGL :: touch_status(void) { // Get the touch screen status
JLS 1:1ea2331f9cbe 46
JLS 1:1ea2331f9cbe 47 char command[2] = "";
JLS 1:1ea2331f9cbe 48
JLS 1:1ea2331f9cbe 49 command[0] = GETTOUCH;
JLS 1:1ea2331f9cbe 50 command[1] = STATUS;
JLS 1:1ea2331f9cbe 51
JLS 1:1ea2331f9cbe 52 return getSTATUS(command, 2);
JLS 1:1ea2331f9cbe 53 }
JLS 1:1ea2331f9cbe 54
JLS 1:1ea2331f9cbe 55
JLS 1:1ea2331f9cbe 56 //******************************************************************************************************
JLS 1:1ea2331f9cbe 57 void TFT_4DGL :: wait_touch(int delay) { // wait until touch within a delay in milliseconds
JLS 1:1ea2331f9cbe 58
JLS 1:1ea2331f9cbe 59 char command[3]= "";
JLS 1:1ea2331f9cbe 60
JLS 1:1ea2331f9cbe 61 command[0] = WAITTOUCH;
JLS 1:1ea2331f9cbe 62
JLS 1:1ea2331f9cbe 63 command[1] = (delay >> 8) & 0xFF;
JLS 1:1ea2331f9cbe 64 command[2] = delay & 0xFF;
JLS 1:1ea2331f9cbe 65
JLS 1:1ea2331f9cbe 66 writeCOMMAND(command, 3);
JLS 1:1ea2331f9cbe 67 }
JLS 1:1ea2331f9cbe 68
JLS 1:1ea2331f9cbe 69 //******************************************************************************************************
JLS 1:1ea2331f9cbe 70 void TFT_4DGL :: set_touch(int x1, int y1 , int x2, int y2) { // define touch area
JLS 1:1ea2331f9cbe 71
JLS 1:1ea2331f9cbe 72 char command[9]= "";
JLS 1:1ea2331f9cbe 73
JLS 1:1ea2331f9cbe 74 command[0] = SETTOUCH;
JLS 1:1ea2331f9cbe 75
JLS 1:1ea2331f9cbe 76 command[1] = (x1 >> 8) & 0xFF;
JLS 1:1ea2331f9cbe 77 command[2] = x1 & 0xFF;
JLS 1:1ea2331f9cbe 78
JLS 1:1ea2331f9cbe 79 command[3] = (y1 >> 8) & 0xFF;
JLS 1:1ea2331f9cbe 80 command[4] = y1 & 0xFF;
JLS 1:1ea2331f9cbe 81
JLS 1:1ea2331f9cbe 82 command[5] = (x2 >> 8) & 0xFF;
JLS 1:1ea2331f9cbe 83 command[6] = x2 & 0xFF;
JLS 1:1ea2331f9cbe 84
JLS 1:1ea2331f9cbe 85 command[7] = (y2 >> 8) & 0xFF;
JLS 1:1ea2331f9cbe 86 command[8] = y2 & 0xFF;
JLS 1:1ea2331f9cbe 87
JLS 1:1ea2331f9cbe 88 writeCOMMAND(command, 9);
JLS 1:1ea2331f9cbe 89 }
JLS 1:1ea2331f9cbe 90
JLS 1:1ea2331f9cbe 91 //******************************************************************************************************
JLS 1:1ea2331f9cbe 92 // There is no way to have the uLCD-32PT trigger an interrupt when touched.
JLS 1:1ea2331f9cbe 93 // This function polls the screen and waits for a touch to regiester
JLS 1:1ea2331f9cbe 94 //******************************************************************************************************
JLS 1:1ea2331f9cbe 95 void TFT_4DGL :: Pause_Until_Touch(int *x, int *y) { // Actually waits for a TouchScreen release!
JLS 1:1ea2331f9cbe 96
JLS 1:1ea2331f9cbe 97 char TouchStatus = 0; //Initalise the TouchStatus as 0 = no touch activity
JLS 1:1ea2331f9cbe 98 char command[2] = "";
JLS 1:1ea2331f9cbe 99
JLS 1:1ea2331f9cbe 100 do{
JLS 1:1ea2331f9cbe 101 TouchStatus = touch_status(); //Get the touchscreen status
JLS 1:1ea2331f9cbe 102 wait(0.1);
JLS 1:1ea2331f9cbe 103 }while (TouchStatus != 2);
JLS 1:1ea2331f9cbe 104
JLS 1:1ea2331f9cbe 105 command[0] = GETTOUCH;
JLS 1:1ea2331f9cbe 106 command[1] = GETPOSITION;
JLS 1:1ea2331f9cbe 107
JLS 1:1ea2331f9cbe 108 getTOUCH(command, 2, x, y);
JLS 1:1ea2331f9cbe 109 }