TFT_4DGL_Graphics.cpp

00001 //
00002 // TFT_4DGL is a class to drive 4D Systems TFT touch screens
00003 //
00004 // Copyright (C) <2010> Stephane ROCHON <stephane.rochon at free.fr>
00005 //
00006 // TFT_4DGL is free software: you can redistribute it and/or modify
00007 // it under the terms of the GNU General Public License as published by
00008 // the Free Software Foundation, either version 3 of the License, or
00009 // (at your option) any later version.
00010 //
00011 // TFT_4DGL is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 //
00016 // You should have received a copy of the GNU General Public License
00017 // along with TFT_4DGL.  If not, see <http://www.gnu.org/licenses/>.
00018 
00019 #include "mbed.h"
00020 #include "TFT_4DGL.h"
00021 
00022 
00023 //****************************************************************************************************
00024 void TFT_4DGL :: circle(int x, int y , int radius, int color) {   // draw a circle in (x,y)
00025     char command[9]= "";
00026 
00027     command[0] = CIRCLE;
00028 
00029     command[1] = (x >> 8) & 0xFF;
00030     command[2] = x & 0xFF;
00031 
00032     command[3] = (y >> 8) & 0xFF;
00033     command[4] = y & 0xFF;
00034 
00035     command[5] = (radius >> 8) & 0xFF;
00036     command[6] = radius & 0xFF;
00037 
00038     int red5   = (color >> (16 + 3)) & 0x1F;              // get red on 5 bits
00039     int green6 = (color >> (8 + 2))  & 0x3F;              // get green on 6 bits
00040     int blue5  = (color >> (0 + 3))  & 0x1F;              // get blue on 5 bits
00041 
00042     command[7] = ((red5 << 3)   + (green6 >> 3)) & 0xFF;  // first part of 16 bits color
00043     command[8] = ((green6 << 5) + (blue5 >>  0)) & 0xFF;  // second part of 16 bits color
00044 
00045     writeCOMMAND(command, 9);
00046 }
00047 
00048 //****************************************************************************************************
00049 void TFT_4DGL :: triangle(int x1, int y1 , int x2, int y2, int x3, int y3, int color) {   // draw a traingle
00050     char command[15]= "";
00051 
00052     command[0] = TRIANGLE;
00053 
00054     command[1] = (x1 >> 8) & 0xFF;
00055     command[2] = x1 & 0xFF;
00056 
00057     command[3] = (y1 >> 8) & 0xFF;
00058     command[4] = y1 & 0xFF;
00059 
00060     command[5] = (x2 >> 8) & 0xFF;
00061     command[6] = x2 & 0xFF;
00062 
00063     command[7] = (y2 >> 8) & 0xFF;
00064     command[8] = y2 & 0xFF;
00065 
00066     command[9] = (x3 >> 8) & 0xFF;
00067     command[10] = x3 & 0xFF;
00068 
00069     command[11] = (y3 >> 8) & 0xFF;
00070     command[12] = y3 & 0xFF;
00071 
00072     int red5   = (color >> (16 + 3)) & 0x1F;               // get red on 5 bits
00073     int green6 = (color >> (8 + 2))  & 0x3F;               // get green on 6 bits
00074     int blue5  = (color >> (0 + 3))  & 0x1F;               // get blue on 5 bits
00075 
00076     command[13] = ((red5 << 3)   + (green6 >> 3)) & 0xFF;  // first part of 16 bits color
00077     command[14] = ((green6 << 5) + (blue5 >>  0)) & 0xFF;  // second part of 16 bits color
00078 
00079     writeCOMMAND(command, 15);
00080 }
00081 
00082 //****************************************************************************************************
00083 void TFT_4DGL :: line(int x1, int y1 , int x2, int y2, int color) {   // draw a line
00084     char command[11]= "";
00085 
00086     command[0] = LINE;
00087 
00088     command[1] = (x1 >> 8) & 0xFF;
00089     command[2] = x1 & 0xFF;
00090 
00091     command[3] = (y1 >> 8) & 0xFF;
00092     command[4] = y1 & 0xFF;
00093 
00094     command[5] = (x2 >> 8) & 0xFF;
00095     command[6] = x2 & 0xFF;
00096 
00097     command[7] = (y2 >> 8) & 0xFF;
00098     command[8] = y2 & 0xFF;
00099 
00100     int red5   = (color >> (16 + 3)) & 0x1F;               // get red on 5 bits
00101     int green6 = (color >> (8 + 2))  & 0x3F;               // get green on 6 bits
00102     int blue5  = (color >> (0 + 3))  & 0x1F;               // get blue on 5 bits
00103 
00104     command[9] = ((red5 << 3)   + (green6 >> 3)) & 0xFF;   // first part of 16 bits color
00105     command[10] = ((green6 << 5) + (blue5 >>  0)) & 0xFF;  // second part of 16 bits color
00106 
00107     writeCOMMAND(command, 11);
00108 }
00109 
00110 //****************************************************************************************************
00111 void TFT_4DGL :: rectangle(int x1, int y1 , int x2, int y2, int color) {   // draw a rectangle
00112     char command[11]= "";
00113 
00114     command[0] = RECTANGLE;
00115 
00116     command[1] = (x1 >> 8) & 0xFF;
00117     command[2] = x1 & 0xFF;
00118 
00119     command[3] = (y1 >> 8) & 0xFF;
00120     command[4] = y1 & 0xFF;
00121 
00122     command[5] = (x2 >> 8) & 0xFF;
00123     command[6] = x2 & 0xFF;
00124 
00125     command[7] = (y2 >> 8) & 0xFF;
00126     command[8] = y2 & 0xFF;
00127 
00128     int red5   = (color >> (16 + 3)) & 0x1F;               // get red on 5 bits
00129     int green6 = (color >> (8 + 2))  & 0x3F;               // get green on 6 bits
00130     int blue5  = (color >> (0 + 3))  & 0x1F;               // get blue on 5 bits
00131 
00132     command[9] = ((red5 << 3)   + (green6 >> 3)) & 0xFF;   // first part of 16 bits color
00133     command[10] = ((green6 << 5) + (blue5 >>  0)) & 0xFF;  // second part of 16 bits color
00134 
00135     writeCOMMAND(command, 11);
00136 }
00137 
00138 //****************************************************************************************************
00139 void TFT_4DGL :: ellipse(int x, int y , int radius_x, int radius_y, int color) {   // draw an ellipse
00140     char command[11]= "";
00141 
00142     command[0] = ELLIPSE;
00143 
00144     command[1] = (x >> 8) & 0xFF;
00145     command[2] = x & 0xFF;
00146 
00147     command[3] = (y >> 8) & 0xFF;
00148     command[4] = y & 0xFF;
00149 
00150     command[5] = (radius_x >> 8) & 0xFF;
00151     command[6] = radius_x & 0xFF;
00152 
00153     command[7] = (radius_y >> 8) & 0xFF;
00154     command[8] = radius_y & 0xFF;
00155 
00156     int red5   = (color >> (16 + 3)) & 0x1F;               // get red on 5 bits
00157     int green6 = (color >> (8 + 2))  & 0x3F;               // get green on 6 bits
00158     int blue5  = (color >> (0 + 3))  & 0x1F;               // get blue on 5 bits
00159 
00160     command[9] = ((red5 << 3)   + (green6 >> 3)) & 0xFF;   // first part of 16 bits color
00161     command[10] = ((green6 << 5) + (blue5 >>  0)) & 0xFF;  // second part of 16 bits color
00162 
00163     writeCOMMAND(command, 11);
00164 }
00165 
00166 //****************************************************************************************************
00167 void TFT_4DGL :: pixel(int x, int y, int color) {   // draw a pixel
00168     char command[7]= "";
00169 
00170     command[0] = PIXEL;
00171 
00172     command[1] = (x >> 8) & 0xFF;
00173     command[2] = x & 0xFF;
00174 
00175     command[3] = (y >> 8) & 0xFF;
00176     command[4] = y & 0xFF;
00177 
00178     int red5   = (color >> (16 + 3)) & 0x1F;              // get red on 5 bits
00179     int green6 = (color >> (8 + 2))  & 0x3F;              // get green on 6 bits
00180     int blue5  = (color >> (0 + 3))  & 0x1F;              // get blue on 5 bits
00181 
00182     command[5] = ((red5 << 3)   + (green6 >> 3)) & 0xFF;  // first part of 16 bits color
00183     command[6] = ((green6 << 5) + (blue5 >>  0)) & 0xFF;  // second part of 16 bits color
00184 
00185     writeCOMMAND(command, 7);
00186 }
00187 
00188 //******************************************************************************************************
00189 int TFT_4DGL :: read_pixel(int x, int y) { // read screen info and populate data
00190 
00191     char command[5]= "";
00192 
00193     command[0] = READPIXEL;
00194 
00195     command[1] = (x >> 8) & 0xFF;
00196     command[2] = x & 0xFF;
00197 
00198     command[3] = (y >> 8) & 0xFF;
00199     command[4] = y & 0xFF;
00200 
00201     int i, temp = 0, color = 0, resp = 0;
00202     char response[2] = "";
00203 
00204     freeBUFFER();
00205 
00206     for (i = 0; i < 5; i++) {                   // send all chars to serial port
00207         writeBYTE(command[i]);
00208     }
00209 
00210     while (!_cmd.readable()) wait_ms(TEMPO);    // wait for screen answer
00211 
00212     while (_cmd.readable()) {
00213         temp = _cmd.getc();
00214         response[resp++] = (char)temp;
00215     }
00216 
00217     color = ((response[0] << 8) + response[1]);
00218 
00219     return color; // WARNING : this is 16bits color, not 24bits... need to be fixed
00220 }
00221 
00222 //******************************************************************************************************
00223 void TFT_4DGL :: screen_copy(int xs, int ys , int xd, int yd , int width, int height) {
00224 
00225     char command[13]= "";
00226 
00227     command[0] = SCREENCOPY;
00228 
00229     command[1] = (xs >> 8) & 0xFF;
00230     command[2] = xs & 0xFF;
00231 
00232     command[3] = (ys >> 8) & 0xFF;
00233     command[4] = ys & 0xFF;
00234 
00235     command[5] = (xd >> 8) & 0xFF;
00236     command[6] = xd & 0xFF;
00237 
00238     command[7] = (yd >> 8) & 0xFF;
00239     command[8] = yd & 0xFF;
00240 
00241     command[9] = (width >> 8) & 0xFF;
00242     command[10] = width & 0xFF;
00243 
00244     command[11] = (height >> 8) & 0xFF;
00245     command[12] = height & 0xFF;
00246 
00247     writeCOMMAND(command, 13);
00248 }
00249 
00250 //****************************************************************************************************
00251 void TFT_4DGL :: pen_size(char mode) {   // set pen to SOLID or WIREFRAME
00252     char command[2]= "";
00253 
00254     command[0] = PENSIZE;
00255     command[1] = mode;
00256 
00257     writeCOMMAND(command, 2);
00258 }