4DGL-uLCD-SE
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uLCD_4DGL_main.cpp
00001 // 00002 // uLCD_4DGL is a class to drive 4D Systems uLCD 144 G2 00003 // 00004 // Copyright (C) <2010> Stephane ROCHON <stephane.rochon at free.fr> 00005 // Modifed for Goldelox processor <2013> Jim Hamblen 00006 // 00007 // uLCD_4DGL is free software: you can redistribute it and/or modify 00008 // it under the terms of the GNU General Public License as published by 00009 // the Free Software Foundation, either version 3 of the License, or 00010 // (at your option) any later version. 00011 // 00012 // uLCD_4DGL is distributed in the hope that it will be useful, 00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 // GNU General Public License for more details. 00016 // 00017 // You should have received a copy of the GNU General Public License 00018 // along with uLCD_4DGL. If not, see <http://www.gnu.org/licenses/>. 00019 00020 #include "mbed.h" 00021 #include "uLCD_4DGL.h" 00022 00023 #define ARRAY_SIZE(X) sizeof(X)/sizeof(X[0]) 00024 00025 //Serial pc(USBTX,USBRX); 00026 00027 00028 //****************************************************************************************************** 00029 uLCD_4DGL :: uLCD_4DGL(PinName tx, PinName rx, PinName rst) : _cmd(tx, rx), 00030 _rst(rst) 00031 #if DEBUGMODE 00032 ,pc(USBTX, USBRX) 00033 #endif // DEBUGMODE 00034 { 00035 // Constructor 00036 _cmd.baud(9600); 00037 #if DEBUGMODE 00038 pc.baud(115200); 00039 00040 pc.printf("\n\n\n"); 00041 pc.printf("*********************\n"); 00042 pc.printf("uLCD_4DGL CONSTRUCTOR\n"); 00043 pc.printf("*********************\n"); 00044 #endif 00045 00046 _rst = 1; // put RESET pin to high to start TFT screen 00047 reset(); 00048 cls(); // clear screen 00049 current_col = 0; // initial cursor col 00050 current_row = 0; // initial cursor row 00051 current_color = WHITE; // initial text color 00052 current_orientation = IS_PORTRAIT; // initial screen orientation 00053 current_hf = 1; 00054 current_wf = 1; 00055 set_font(FONT_7X8); // initial font 00056 // text_mode(OPAQUE); // initial texr mode 00057 } 00058 00059 //****************************************************************************************************** 00060 void uLCD_4DGL :: writeBYTE(char c) // send a BYTE command to screen 00061 { 00062 00063 _cmd.putc(c); 00064 wait_us(500); //mbed is too fast for LCD at high baud rates in some long commands 00065 00066 #if DEBUGMODE 00067 pc.printf(" Char sent : 0x%02X\n",c); 00068 #endif 00069 00070 } 00071 00072 //****************************************************************************************************** 00073 void uLCD_4DGL :: writeBYTEfast(char c) // send a BYTE command to screen 00074 { 00075 00076 _cmd.putc(c); 00077 //wait_ms(0.0); //mbed is too fast for LCD at high baud rates - but not in short commands 00078 00079 #if DEBUGMODE 00080 pc.printf(" Char sent : 0x%02X\n",c); 00081 #endif 00082 00083 } 00084 //****************************************************************************************************** 00085 void uLCD_4DGL :: freeBUFFER(void) // Clear serial buffer before writing command 00086 { 00087 00088 while (_cmd.readable()) _cmd.getc(); // clear buffer garbage 00089 } 00090 00091 //****************************************************************************************************** 00092 int uLCD_4DGL :: writeCOMMAND(char *command, int number) // send several BYTES making a command and return an answer 00093 { 00094 00095 #if DEBUGMODE 00096 pc.printf("\n"); 00097 pc.printf("New COMMAND : 0x%02X\n", command[0]); 00098 #endif 00099 int i, resp = 0; 00100 freeBUFFER(); 00101 writeBYTE(0xFF); 00102 for (i = 0; i < number; i++) { 00103 if (i<16) 00104 writeBYTEfast(command[i]); // send command to serial port 00105 else 00106 writeBYTE(command[i]); // send command to serial port but slower 00107 } 00108 while (!_cmd.readable()) wait_ms(TEMPO); // wait for screen answer 00109 if (_cmd.readable()) resp = _cmd.getc(); // read response if any 00110 switch (resp) { 00111 case ACK : // if OK return 1 00112 resp = 1; 00113 break; 00114 case NAK : // if NOK return -1 00115 resp = -1; 00116 break; 00117 default : 00118 resp = 0; // else return 0 00119 break; 00120 } 00121 #if DEBUGMODE 00122 pc.printf(" Answer received : %d\n",resp); 00123 #endif 00124 00125 return resp; 00126 } 00127 00128 //************************************************************************** 00129 void uLCD_4DGL :: reset() // Reset Screen 00130 { 00131 wait_ms(5); 00132 _rst = 0; // put RESET pin to low 00133 wait_ms(5); // wait a few milliseconds for command reception 00134 _rst = 1; // put RESET back to high 00135 wait(3); // wait 3s for screen to restart 00136 00137 freeBUFFER(); // clean buffer from possible garbage 00138 } 00139 //****************************************************************************************************** 00140 int uLCD_4DGL :: writeCOMMANDnull(char *command, int number) // send several BYTES making a command and return an answer 00141 { 00142 00143 #if DEBUGMODE 00144 pc.printf("\n"); 00145 pc.printf("New COMMAND : 0x%02X\n", command[0]); 00146 #endif 00147 int i, resp = 0; 00148 freeBUFFER(); 00149 writeBYTE(0x00); //command has a null prefix byte 00150 for (i = 0; i < number; i++) { 00151 if (i<16) //don't overflow LCD UART buffer 00152 writeBYTEfast(command[i]); // send command to serial port 00153 else 00154 writeBYTE(command[i]); // send command to serial port with delay 00155 } 00156 while (!_cmd.readable()) wait_ms(TEMPO); // wait for screen answer 00157 if (_cmd.readable()) resp = _cmd.getc(); // read response if any 00158 switch (resp) { 00159 case ACK : // if OK return 1 00160 resp = 1; 00161 break; 00162 case NAK : // if NOK return -1 00163 resp = -1; 00164 break; 00165 default : 00166 resp = 0; // else return 0 00167 break; 00168 } 00169 #if DEBUGMODE 00170 pc.printf(" Answer received : %d\n",resp); 00171 #endif 00172 00173 return resp; 00174 } 00175 00176 //************************************************************************** 00177 void uLCD_4DGL :: cls() // clear screen 00178 { 00179 char command[1] = ""; 00180 00181 command[0] = CLS; 00182 writeCOMMAND(command, 1); 00183 current_row=0; 00184 current_col=0; 00185 current_hf = 1; 00186 current_wf = 1; 00187 set_font(FONT_7X8); // initial font 00188 } 00189 00190 //************************************************************************** 00191 int uLCD_4DGL :: version() // get API version 00192 { 00193 00194 char command[2] = ""; 00195 command[0] = '\x00'; 00196 command[1] = VERSION; 00197 return readVERSION(command, 2); 00198 } 00199 00200 //************************************************************************** 00201 void uLCD_4DGL :: baudrate(int speed) // set screen baud rate 00202 { 00203 char command[3]= ""; 00204 writeBYTE(0x00); 00205 command[0] = BAUDRATE; 00206 command[1] = 0; 00207 int newbaud = BAUD_9600; 00208 switch (speed) { 00209 case 110 : 00210 newbaud = BAUD_110; 00211 break; 00212 case 300 : 00213 newbaud = BAUD_300; 00214 break; 00215 case 600 : 00216 newbaud = BAUD_600; 00217 break; 00218 case 1200 : 00219 newbaud = BAUD_1200; 00220 break; 00221 case 2400 : 00222 newbaud = BAUD_2400; 00223 break; 00224 case 4800 : 00225 newbaud = BAUD_4800; 00226 break; 00227 case 9600 : 00228 newbaud = BAUD_9600; 00229 break; 00230 case 14400 : 00231 newbaud = BAUD_14400; 00232 break; 00233 case 19200 : 00234 newbaud = BAUD_19200; 00235 break; 00236 case 31250 : 00237 newbaud = BAUD_31250; 00238 break; 00239 case 38400 : 00240 newbaud = BAUD_38400; 00241 break; 00242 case 56000 : 00243 newbaud = BAUD_56000; 00244 break; 00245 case 57600 : 00246 newbaud = BAUD_57600; 00247 break; 00248 case 115200 : 00249 newbaud = BAUD_115200; 00250 break; 00251 case 128000 : 00252 newbaud = BAUD_128000; 00253 break; 00254 case 256000 : 00255 newbaud = BAUD_256000; 00256 break; 00257 case 300000 : 00258 newbaud = BAUD_300000; 00259 speed = 272727; 00260 break; 00261 case 375000 : 00262 newbaud = BAUD_375000; 00263 speed = 333333; 00264 break; 00265 case 500000 : 00266 newbaud = BAUD_500000; 00267 speed = 428571; 00268 break; 00269 case 600000 : 00270 newbaud = BAUD_600000; 00271 break; 00272 case 750000 : //rates over 600000 are not documented, but seem to work 00273 newbaud = BAUD_750000; 00274 break; 00275 case 1000000 : 00276 newbaud = BAUD_1000000; 00277 break; 00278 case 1500000 : 00279 newbaud = BAUD_1500000; 00280 break; 00281 case 3000000 : 00282 newbaud = BAUD_3000000; 00283 break; 00284 default : 00285 newbaud = BAUD_9600; 00286 speed = 9600; 00287 break; 00288 } 00289 00290 int i, resp = 0; 00291 00292 freeBUFFER(); 00293 command[1] = char(newbaud >>8); 00294 command[2] = char(newbaud % 256); 00295 wait_ms(1); 00296 for (i = 0; i <3; i++) writeBYTEfast(command[i]); // send command to serial port 00297 for (i = 0; i<10; i++) wait_ms(1); 00298 //dont change baud until all characters get sent out 00299 _cmd.baud(speed); // set mbed to same speed 00300 i=0; 00301 while ((!_cmd.readable()) && (i<25000)) { 00302 wait_ms(TEMPO); // wait for screen answer - comes 100ms after change 00303 i++; //timeout if ack character missed by baud change 00304 } 00305 if (_cmd.readable()) resp = _cmd.getc(); // read response if any 00306 switch (resp) { 00307 case ACK : // if OK return 1 00308 resp = 1; 00309 break; 00310 case NAK : // if NOK return -1 00311 resp = -1; 00312 break; 00313 default : 00314 resp = 0; // else return 0 00315 break; 00316 } 00317 } 00318 00319 //****************************************************************************************************** 00320 int uLCD_4DGL :: readVERSION(char *command, int number) // read screen info and populate data 00321 { 00322 00323 int i, temp = 0, resp = 0; 00324 char response[5] = ""; 00325 00326 freeBUFFER(); 00327 00328 for (i = 0; i < number; i++) writeBYTE(command[i]); // send all chars to serial port 00329 00330 while (!_cmd.readable()) wait_ms(TEMPO); // wait for screen answer 00331 00332 while (_cmd.readable() && resp < ARRAY_SIZE(response)) { 00333 temp = _cmd.getc(); 00334 response[resp++] = (char)temp; 00335 } 00336 switch (resp) { 00337 case 2 : // if OK populate data and return 1 00338 revision = response[0]<<8 + response[1]; 00339 resp = 1; 00340 break; 00341 default : 00342 resp = 0; // else return 0 00343 break; 00344 } 00345 return resp; 00346 } 00347 00348 //**************************************************************************************************** 00349 void uLCD_4DGL :: background_color(int color) // set screen background color 00350 { 00351 char command[3]= ""; // input color is in 24bits like 0xRRGGBB 00352 00353 command[0] = BCKGDCOLOR; 00354 00355 int red5 = (color >> (16 + 3)) & 0x1F; // get red on 5 bits 00356 int green6 = (color >> (8 + 2)) & 0x3F; // get green on 6 bits 00357 int blue5 = (color >> (0 + 3)) & 0x1F; // get blue on 5 bits 00358 00359 command[1] = ((red5 << 3) + (green6 >> 3)) & 0xFF; // first part of 16 bits color 00360 command[2] = ((green6 << 5) + (blue5 >> 0)) & 0xFF; // second part of 16 bits color 00361 00362 writeCOMMAND(command, 3); 00363 } 00364 00365 //**************************************************************************************************** 00366 void uLCD_4DGL :: textbackground_color(int color) // set screen background color 00367 { 00368 char command[3]= ""; // input color is in 24bits like 0xRRGGBB 00369 00370 command[0] = TXTBCKGDCOLOR; 00371 00372 int red5 = (color >> (16 + 3)) & 0x1F; // get red on 5 bits 00373 int green6 = (color >> (8 + 2)) & 0x3F; // get green on 6 bits 00374 int blue5 = (color >> (0 + 3)) & 0x1F; // get blue on 5 bits 00375 00376 command[1] = ((red5 << 3) + (green6 >> 3)) & 0xFF; // first part of 16 bits color 00377 command[2] = ((green6 << 5) + (blue5 >> 0)) & 0xFF; // second part of 16 bits color 00378 00379 writeCOMMAND(command, 3); 00380 } 00381 00382 //**************************************************************************************************** 00383 void uLCD_4DGL :: display_control(char mode) // set screen mode to value 00384 { 00385 char command[3]= ""; 00386 00387 command[0] = DISPCONTROL; 00388 command[1] = 0; 00389 command[2] = mode; 00390 00391 if (mode == ORIENTATION) { 00392 switch (mode) { 00393 case LANDSCAPE : 00394 current_orientation = IS_LANDSCAPE; 00395 break; 00396 case LANDSCAPE_R : 00397 current_orientation = IS_LANDSCAPE; 00398 break; 00399 case PORTRAIT : 00400 current_orientation = IS_PORTRAIT; 00401 break; 00402 case PORTRAIT_R : 00403 current_orientation = IS_PORTRAIT; 00404 break; 00405 } 00406 } 00407 writeCOMMAND(command, 3); 00408 set_font(current_font); 00409 } 00410 //**************************************************************************************************** 00411 void uLCD_4DGL :: display_power(char mode) // set screen mode to value 00412 { 00413 char command[3]= ""; 00414 00415 command[0] = DISPPOWER; 00416 command[1] = 0; 00417 command[2] = mode; 00418 writeCOMMAND(command, 3); 00419 } 00420 //**************************************************************************************************** 00421 void uLCD_4DGL :: set_volume(char value) // set sound volume to value 00422 { 00423 char command[2]= ""; 00424 00425 command[0] = SETVOLUME; 00426 command[1] = value; 00427 00428 writeCOMMAND(command, 2); 00429 } 00430 00431 00432 //****************************************************************************************************** 00433 int uLCD_4DGL :: getSTATUS(char *command, int number) // read screen info and populate data 00434 { 00435 00436 #if DEBUGMODE 00437 pc.printf("\n"); 00438 pc.printf("New COMMAND : 0x%02X\n", command[0]); 00439 #endif 00440 00441 int i, temp = 0, resp = 0; 00442 char response[5] = ""; 00443 00444 freeBUFFER(); 00445 00446 for (i = 0; i < number; i++) writeBYTE(command[i]); // send all chars to serial port 00447 00448 while (!_cmd.readable()) wait_ms(TEMPO); // wait for screen answer 00449 00450 while (_cmd.readable() && resp < ARRAY_SIZE(response)) { 00451 temp = _cmd.getc(); 00452 response[resp++] = (char)temp; 00453 } 00454 switch (resp) { 00455 case 4 : 00456 resp = (int)response[1]; // if OK populate data 00457 break; 00458 default : 00459 resp = -1; // else return 0 00460 break; 00461 } 00462 00463 #if DEBUGMODE 00464 pc.printf(" Answer received : %d\n", resp); 00465 #endif 00466 00467 return resp; 00468 } 00469
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