TouchScreen.cpp

00001 /**
00002  * @file
00003  * @version
00004  * @author Ashley.Mills@vodafone.com
00005  * @brief Touchscreen control.
00006  */
00007 
00008 #include "TouchScreen.h"
00009 
00010 #define WAIT_TIMEOUT_MS 1000
00011 
00012 TouchScreen::TouchScreen(PinName tx, PinName rx, PinName resetPin, const char *name) : Serial(tx,rx,name) {
00013     baud(9600);
00014     _resetPin = new DigitalOut(resetPin);
00015     _resetPin->write(1);
00016     reset();
00017     _initOK = false;
00018     putc('U');
00019     _initOK = gack();
00020     _fillColor = createRGBClassic(21,21,21);
00021     _strokeColor = createRGBClassic(221,221,221);
00022 }
00023 
00024 TouchScreen::TouchScreen(PinName tx, PinName rx, PinName resetPin, eBaudRate baudRate, const char *name) : Serial (tx,rx,name) {
00025     baud(9600);
00026     _resetPin = new DigitalOut(resetPin);
00027     _resetPin->write(1);
00028     reset();
00029     _initOK = false;
00030     putc('U');
00031     if((_initOK=gack())) {
00032         setBaudRate(baudRate);
00033     } 
00034     _fillColor = createRGBClassic(21,21,21);
00035     _strokeColor = createRGBClassic(221,221,221);
00036 }
00037 
00038 void TouchScreen::reset() {
00039    _resetPin->write(0);
00040    Thread::wait(2);
00041    _resetPin->write(1);
00042    Thread::wait(3000);
00043 }
00044 
00045 void TouchScreen::clearScreen() {
00046     putc('E');
00047     gack();
00048 }
00049 
00050 bool TouchScreen::setBaudRate(eBaudRate baudRate) {
00051     long newRate = 9600;
00052     uint8_t rateCommand = (uint8_t)0x06;
00053     putc('Q');
00054     switch(baudRate) {
00055         case BAUD_9600:
00056             rateCommand   = (uint8_t)0x06;
00057             newRate = 9600;
00058         break;
00059 
00060         case BAUD_14400:
00061             rateCommand   = (uint8_t)0x07;
00062             newRate = 14400;
00063         break;
00064 
00065         case BAUD_19200:
00066             rateCommand   = (uint8_t)0x08;
00067             newRate = 19200;
00068         break;
00069 
00070         case BAUD_57600:
00071             rateCommand   = (uint8_t)0x0C;
00072             newRate = 57600;
00073         break;
00074 
00075         case BAUD_115200:
00076             rateCommand   = (uint8_t)0x0D;
00077             newRate = 115200;
00078         break;
00079 
00080         case BAUD_256000:
00081             rateCommand   = (uint8_t)0x0F;
00082             newRate = 256000;
00083         break;
00084     }
00085     putc((uint8_t)rateCommand);
00086     // doesn't seem to want to acknowledge at either the old baud rate or the new baud rate
00087     dropBytes(1);
00088     baud(newRate);
00089     return true;
00090 }
00091 
00092 void TouchScreen::setPenSolid() {
00093     putc('p');
00094     putc((uint8_t)0x0);
00095     gack();
00096 }
00097 
00098 void TouchScreen::setPenWireframe() {
00099     putc('p');
00100     putc((uint8_t)0x1);
00101     gack();
00102 }
00103 
00104 void TouchScreen::setBackgroundColor(uint16_t color) {
00105     putc('K');
00106     putc(highByte(color));
00107     putc(lowByte(color));
00108     gack();
00109 }
00110 
00111 bool TouchScreen::waitUntilReadable() {
00112     long timeOut = WAIT_TIMEOUT_MS;
00113     Timer timer;
00114     timer.start();
00115     while(1) {
00116         if(readable())
00117             return true;
00118         if(timer.read_ms()>timeOut)
00119             return false;
00120     }
00121 }
00122 
00123 bool TouchScreen::gack() {
00124     if(waitUntilReadable()) {
00125        uint8_t b = getc();
00126        return (b==0x06);
00127     }
00128     return false;
00129 }
00130 
00131 void TouchScreen::drawPixel(uint16_t xPos, uint16_t yPos, uint16_t color) {
00132     putc('P');
00133     putc(highByte(xPos));   // x pos
00134     putc(lowByte(xPos));
00135 
00136     putc(highByte(yPos));   // y pos
00137     putc(lowByte(yPos));
00138 
00139     putc(highByte(color));  // color
00140     putc(lowByte(color));
00141     gack();
00142 }
00143 
00144 void TouchScreen::drawCircle(uint16_t xPos, uint16_t yPos, uint16_t radius, uint16_t color) {
00145     putc('C');
00146     putc(highByte(xPos));   // x pos
00147     putc(lowByte(xPos));
00148 
00149     putc(highByte(yPos));   // y pos
00150     putc(lowByte(yPos));
00151 
00152     putc(highByte(radius)); // radius
00153     putc(lowByte(radius));
00154 
00155     putc(highByte(color));  // color
00156     putc(lowByte(color));
00157     gack();
00158 }
00159 
00160 uint16_t TouchScreen::createRGBClassic(int r, int g, int b) {
00161     return createRGBF(r/255.0f,g/255.0f,b/255.0f);
00162 }
00163 
00164 uint16_t TouchScreen::createRGB(uint8_t r, uint8_t g, uint8_t b) {
00165     if(r>31) r = 31;
00166     if(g>63) g = 63;
00167     if(b>31) b = 31;
00168     uint16_t o = 0;
00169     o |= (r<<0xb);
00170     o |= (g<<0x5);
00171     o |=  b;
00172     return o;
00173 }
00174 
00175 uint16_t TouchScreen::createRGBF(float r, float g, float b) {
00176     return createRGB((uint8_t)(r*31.0f),(uint8_t)(g*63.0f),(uint8_t)(b*31.0f));
00177 }
00178 
00179 void TouchScreen::enableTouch() {
00180     putc('Y');
00181     putc((uint8_t)0x5);
00182     putc((uint8_t)0x0);
00183     gack();
00184 }
00185 
00186 void TouchScreen::disableTouch() {
00187     putc('Y');
00188     putc((uint8_t)0x5);
00189     putc((uint8_t)0x1);
00190     gack();
00191 }
00192 
00193 void TouchScreen::setOrientation(eScreenOrientation o) {
00194     putc('Y');
00195     putc((uint8_t)0x4);
00196     putc((uint8_t)o);
00197     gack();
00198 }
00199 
00200 void TouchScreen::getVersion() {
00201     putc('V');
00202     putc((uint8_t)0x1);
00203     dropBytes((uint16_t)5);
00204 }
00205 
00206 void TouchScreen::dropBytes(uint16_t numBytes) {
00207     while(numBytes--) {
00208         dropByte();
00209     }
00210 }
00211 
00212 void TouchScreen::drawImage(char *name, uint16_t x, uint16_t y) {
00213     putc('@');
00214     putc('m');
00215     printf(name);
00216     putc((uint8_t)0);
00217     putc(highByte((uint16_t)x));
00218     putc(lowByte((uint16_t)x));
00219     putc(highByte((uint16_t)y));
00220     putc(lowByte((uint16_t)y));
00221     putc((uint8_t)0x00);
00222     putc((uint8_t)0x00);
00223     putc((uint8_t)0x00);
00224     putc((uint8_t)0x00);
00225     gack();
00226 }
00227 
00228 void TouchScreen::dropByte() {
00229     if(waitUntilReadable()) {
00230         getc();
00231     }
00232 }
00233 
00234 void TouchScreen::dropByteAndWaitUntilReadable() {
00235     if(waitUntilReadable()) {
00236        getc();
00237     }
00238     waitUntilReadable();
00239 }
00240 
00241 eTouchStatus TouchScreen::getTouchStatus() {
00242     putc('o');
00243     putc((uint8_t)0x4);
00244     dropByteAndWaitUntilReadable();
00245     uint8_t touchStatus = getc();
00246     dropByte();
00247     dropByte();
00248     return (eTouchStatus)touchStatus;
00249 }
00250 
00251 TouchPoint TouchScreen::getLastTouch() {
00252     TouchPoint p;
00253 
00254     putc('o');
00255     putc((uint8_t)0x05);
00256     waitUntilReadable();
00257     uint8_t v = getc();
00258     p.x = (v<<0x8);
00259     waitUntilReadable();
00260     p.x += getc();
00261     waitUntilReadable();
00262     v = getc();
00263     p.y = (v<<0x8);
00264     waitUntilReadable();
00265     p.y += getc();
00266     return p;
00267 }
00268 
00269 void TouchScreen::setBacklight(bool state) {
00270     putc('Y');
00271     putc((uint8_t)0x00);
00272     if(state) {
00273         putc((uint8_t)0x01);
00274     } else {
00275         putc((uint8_t)0x00);
00276     }
00277     gack();
00278 }
00279 
00280 void TouchScreen::setContrast(uint8_t value) {
00281     if(value>0x0F)
00282         value = 0x0F;
00283     putc('Y');
00284     putc((uint8_t)0x02);
00285     putc(value);
00286     gack();
00287 }
00288 
00289 void TouchScreen::drawGraphicsFormatString(uint16_t x, uint16_t y, eInternalFont font, uint16_t textColor, uint8_t charWidth, uint8_t charHeight, char* text) {
00290     putc('S');
00291     putc((uint8_t)highByte(x));
00292     putc((uint8_t)lowByte(x));
00293     putc((uint8_t)highByte(y));
00294     putc((uint8_t)lowByte(y));
00295     putc((uint8_t)font);
00296     putc((uint8_t)highByte(textColor));
00297     putc((uint8_t)lowByte(textColor));
00298     putc((uint8_t)charWidth);
00299     putc((uint8_t)charHeight);
00300     if(strlen(text)==256) { // change to own implementation of strnlen
00301         text[256] = 0;
00302     }
00303     printf(text);
00304     putc((uint8_t)0x00);
00305     gack();
00306 }
00307 
00308 
00309 void TouchScreen::drawTextFormatString(uint8_t row, uint8_t column, eInternalFont font, uint16_t textColor, char* text) {
00310     putc('s');
00311     putc((uint8_t)column);
00312     putc((uint8_t)row);
00313     putc((uint8_t)font);
00314     putc((uint8_t)highByte(textColor));
00315     putc((uint8_t)lowByte(textColor));
00316     if(strlen(text)==256) { // change to own implementation of strnlen
00317         text[256] = 0;
00318     }
00319     printf(text);
00320     putc((uint8_t)0x00);
00321     gack();
00322 }
00323 
00324 void TouchScreen::drawRectangle(uint16_t topLeftX, uint16_t topLeftY, uint16_t botRightX, uint16_t botRightY, uint16_t color) {
00325     putc('r');
00326     putc(highByte(topLeftX));
00327     putc(lowByte (topLeftX));
00328     putc(highByte(topLeftY));
00329     putc(lowByte (topLeftY));
00330     putc(highByte(botRightX));
00331     putc(lowByte (botRightX));
00332     putc(highByte(botRightY));
00333     putc(lowByte (botRightY));
00334     putc(highByte(color));
00335     putc(lowByte (color));
00336     gack();
00337 }
00338 
00339 void TouchScreen::drawRectangleWH(uint16_t topLeftX, uint16_t topLeftY, uint16_t width, uint16_t height, uint16_t color) {
00340     uint16_t botRightX = topLeftX + width;
00341     uint16_t botRightY = topLeftY + height;
00342     putc('r');
00343     putc(highByte(topLeftX));
00344     putc(lowByte (topLeftX));
00345     putc(highByte(topLeftY));
00346     putc(lowByte (topLeftY));
00347     putc(highByte(botRightX));
00348     putc(lowByte (botRightX));
00349     putc(highByte(botRightY));
00350     putc(lowByte (botRightY));
00351     putc(highByte(color));
00352     putc(lowByte (color));
00353     gack();
00354 }
00355 
00356 void TouchScreen::drawRectangleWH(uint16_t topLeftX, uint16_t topLeftY, uint16_t width, uint16_t height) {
00357     setPenSolid();
00358     drawRectangleWH(topLeftX,topLeftY,width,height,_fillColor);
00359     setPenWireframe();
00360     drawRectangleWH(topLeftX,topLeftY,width,height,_strokeColor);
00361     setPenSolid();
00362 }
00363 
00364 
00365 void TouchScreen::drawLine(uint16_t topLeftX, uint16_t topLeftY, uint16_t botRightX, uint16_t botRightY, uint16_t color) {
00366     putc('L');
00367     putc(highByte(topLeftX));
00368     putc(lowByte (topLeftX));
00369     putc(highByte(topLeftY));
00370     putc(lowByte (topLeftY));
00371     putc(highByte(botRightX));
00372     putc(lowByte (botRightX));
00373     putc(highByte(botRightY));
00374     putc(lowByte (botRightY));
00375     putc(highByte(color));
00376     putc(lowByte (color));
00377     gack();
00378 }
00379 
00380 void TouchScreen::drawChar(char c, uint16_t x, uint16_t y, uint16_t color, uint8_t width, uint8_t height) {
00381     putc('t');
00382     putc(c);
00383     putc(highByte(x));
00384     putc(lowByte (x));
00385     putc(highByte(y));
00386     putc(lowByte (y));
00387     putc(highByte(color));
00388     putc(lowByte (color));
00389     putc(width);
00390     putc(height);
00391     gack();
00392 }
00393 
00394 
00395 void TouchScreen::setFont(uint8_t fontIndex) {
00396     putc('F');
00397     putc(fontIndex);
00398     gack();
00399 }
00400 
00401 void TouchScreen::drawText(char *s, uint16_t x, uint16_t y) {
00402     drawGraphicsFormatString(
00403         x,y,
00404         INTERNAL_FONT_8x8,
00405         _strokeColor,
00406         1,1,
00407         s
00408     );
00409 }
00410 
00411 void TouchScreen::setFillColor(uint16_t c) {
00412     _fillColor = c;
00413 }
00414 
00415 void TouchScreen::setStrokeColor(uint16_t c) {
00416     _strokeColor = c;
00417 }