C12832.cpp

00001 /* mbed library for the mbed Lab Board  128*32 pixel LCD
00002  * use C12832 controller
00003  * Copyright (c) 2012 Peter Drescher - DC2PD
00004  * Released under the MIT License: http://mbed.org/license/mit
00005  *
00006  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00007  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00008  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00009  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00010  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00011  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00012  * THE SOFTWARE.
00013  */
00014 
00015 // 13.10.12    initial design
00016 // 25.10.12    add autorefresh of screen
00017 // 25.10.12    add standart font
00018 // 20.12.12    add bitmap graphics
00019 
00020 // optional defines :
00021 // #define debug_lcd  1
00022 
00023 #include "C12832.h"
00024 #include "mbed.h"
00025 #include "stdio.h"
00026 #include "Small_7.h"
00027 
00028 #define BPP    1       // Bits per pixel
00029 
00030 
00031 C12832::C12832(PinName mosi, PinName sck, PinName reset, PinName a0, PinName ncs, const char* name)
00032     : _spi(mosi,NC,sck),_reset(reset),_A0(a0),_CS(ncs),GraphicsDisplay(name)
00033 {
00034     orientation = 1;
00035     draw_mode = NORMAL;
00036     char_x = 0;
00037     lcd_reset();
00038 }
00039 
00040 
00041 int C12832::width()
00042 {
00043     if (orientation == 0 || orientation == 2) return 32;
00044     else return 128;
00045 }
00046 
00047 int C12832::height()
00048 {
00049     if (orientation == 0 || orientation == 2) return 128;
00050     else return 32;
00051 }
00052 
00053 
00054 void C12832::invert(unsigned int o)
00055 {
00056     if(o == 0) wr_cmd(0xA6);
00057     else wr_cmd(0xA7);
00058 }
00059 
00060 
00061 void C12832::set_contrast(unsigned int o)
00062 {
00063     contrast = o;
00064     wr_cmd(0x81);      //  set volume
00065     wr_cmd(o & 0x3F);
00066 }
00067 
00068 unsigned int C12832::get_contrast(void)
00069 {
00070     return(contrast);
00071 }
00072 
00073 
00074 // write command to lcd controller
00075 
00076 void C12832::wr_cmd(unsigned char cmd)
00077 {
00078     _A0 = 0;
00079     _CS = 0;
00080    
00081    _spi.write(cmd);
00082     // int result =  _spi.write(cmd);
00083 //         printf(" Result of SPI %i\r\n",result);
00084     _CS = 1;
00085 }
00086 
00087 // write data to lcd controller
00088 
00089 void C12832::wr_dat(unsigned char dat)
00090 {
00091     _A0 = 1;
00092     _CS = 0;
00093     _spi.write(dat);
00094     _CS = 1;
00095 }
00096 
00097 // reset and init the lcd controller
00098 
00099 void C12832::lcd_reset()
00100 {
00101 
00102     _spi.format(8,3);                 // 8 bit spi mode 3
00103     _spi.frequency(20000000);          // 19,2 Mhz SPI clock
00104     _A0 = 0;
00105     _CS = 1;
00106     _reset = 0;                        // display reset
00107     wait_us(50);
00108     _reset = 1;                       // end reset
00109     wait_ms(5);
00110 
00111     /* Start Initial Sequence ----------------------------------------------------*/
00112 
00113     wr_cmd(0xAE);   //  display off
00114     wr_cmd(0xA2);   //  bias voltage
00115 
00116     wr_cmd(0xA0);
00117     wr_cmd(0xC8);   //  colum normal
00118 
00119     wr_cmd(0x22);   //  voltage resistor ratio
00120     wr_cmd(0x2F);   //  power on
00121     //wr_cmd(0xA4);   //  LCD display ram
00122     wr_cmd(0x40);   // start line = 0
00123     wr_cmd(0xAF);     // display ON
00124 
00125     wr_cmd(0x81);   //  set contrast
00126     wr_cmd(0x17);   //  set contrast
00127 
00128     wr_cmd(0xA6);     // display normal
00129 
00130 
00131     // clear and update LCD
00132     memset(buffer,0x00,512);  // clear display buffer
00133     copy_to_lcd();
00134     auto_up = 1;              // switch on auto update
00135     // dont do this by default. Make the user call
00136     //claim(stdout);           // redirekt printf to lcd
00137     locate(0,0);
00138     set_font((unsigned char*)Small_7);  // standart font
00139 }
00140 
00141 // set one pixel in buffer
00142 
00143 void C12832::pixel(int x, int y, int color)
00144 {
00145     // first check parameter
00146     if(x > 128 || y > 32 || x < 0 || y < 0) return;
00147 
00148     if(draw_mode == NORMAL) {
00149         if(color == 0)
00150             buffer[x + ((y/8) * 128)] &= ~(1 << (y%8));  // erase pixel
00151         else
00152             buffer[x + ((y/8) * 128)] |= (1 << (y%8));   // set pixel
00153     } else { // XOR mode
00154         if(color == 1)
00155             buffer[x + ((y/8) * 128)] ^= (1 << (y%8));   // xor pixel
00156     }
00157 }
00158 
00159 // update lcd
00160 
00161 void C12832::copy_to_lcd(void)
00162 {
00163     
00164     int i=0;
00165     
00166     //page 0
00167     wr_cmd(0x00);      // set column low nibble 0
00168     wr_cmd(0x10);      // set column hi  nibble 0
00169     wr_cmd(0xB0);      // set page address  0
00170     _A0 = 1;
00171     for(i=0; i<128; i++) {
00172         wr_dat(buffer[i]);
00173     }
00174 
00175     // page 1
00176     wr_cmd(0x00);      // set column low nibble 0
00177     wr_cmd(0x10);      // set column hi  nibble 0
00178     wr_cmd(0xB1);      // set page address  1
00179     _A0 = 1;
00180     for(i=128; i<256; i++) {
00181         wr_dat(buffer[i]);
00182     }
00183 
00184     //page 2
00185     wr_cmd(0x00);      // set column low nibble 0
00186     wr_cmd(0x10);      // set column hi  nibble 0
00187     wr_cmd(0xB2);      // set page address  2
00188     _A0 = 1;
00189     for(i=256; i<384; i++) {
00190         wr_dat(buffer[i]);
00191     }
00192 
00193     //page 3
00194     wr_cmd(0x00);      // set column low nibble 0
00195     wr_cmd(0x10);      // set column hi  nibble 0
00196     wr_cmd(0xB3);      // set page address  3
00197     _A0 = 1;
00198 
00199     _CS = 0;
00200     
00201     for(i=384; i<512; i++) {
00202         wr_dat(buffer[i]);
00203     }
00204 
00205 }
00206 
00207 void C12832::cls(void)
00208 {
00209     memset(buffer,0x00,512);  // clear display buffer
00210     copy_to_lcd();
00211 }
00212 
00213 
00214 void C12832::line(int x0, int y0, int x1, int y1, int color)
00215 {
00216     int   dx = 0, dy = 0;
00217     int   dx_sym = 0, dy_sym = 0;
00218     int   dx_x2 = 0, dy_x2 = 0;
00219     int   di = 0;
00220 
00221     dx = x1-x0;
00222     dy = y1-y0;
00223 
00224     //  if (dx == 0) {        /* vertical line */
00225     //      if (y1 > y0) vline(x0,y0,y1,color);
00226     //      else vline(x0,y1,y0,color);
00227     //      return;
00228     //  }
00229 
00230     if (dx > 0) {
00231         dx_sym = 1;
00232     } else {
00233         dx_sym = -1;
00234     }
00235     //  if (dy == 0) {        /* horizontal line */
00236     //      if (x1 > x0) hline(x0,x1,y0,color);
00237     //      else  hline(x1,x0,y0,color);
00238     //      return;
00239     //  }
00240 
00241     if (dy > 0) {
00242         dy_sym = 1;
00243     } else {
00244         dy_sym = -1;
00245     }
00246 
00247     dx = dx_sym*dx;
00248     dy = dy_sym*dy;
00249 
00250     dx_x2 = dx*2;
00251     dy_x2 = dy*2;
00252 
00253     if (dx >= dy) {
00254         di = dy_x2 - dx;
00255         while (x0 != x1) {
00256 
00257             pixel(x0, y0, color);
00258             x0 += dx_sym;
00259             if (di<0) {
00260                 di += dy_x2;
00261             } else {
00262                 di += dy_x2 - dx_x2;
00263                 y0 += dy_sym;
00264             }
00265         }
00266         pixel(x0, y0, color);
00267     } else {
00268         di = dx_x2 - dy;
00269         while (y0 != y1) {
00270             pixel(x0, y0, color);
00271             y0 += dy_sym;
00272             if (di < 0) {
00273                 di += dx_x2;
00274             } else {
00275                 di += dx_x2 - dy_x2;
00276                 x0 += dx_sym;
00277             }
00278         }
00279         pixel(x0, y0, color);
00280     }
00281     if(auto_up) copy_to_lcd();
00282 }
00283 
00284 void C12832::rect(int x0, int y0, int x1, int y1, int color)
00285 {
00286 
00287     if (x1 > x0) line(x0,y0,x1,y0,color);
00288     else  line(x1,y0,x0,y0,color);
00289 
00290     if (y1 > y0) line(x0,y0,x0,y1,color);
00291     else line(x0,y1,x0,y0,color);
00292 
00293     if (x1 > x0) line(x0,y1,x1,y1,color);
00294     else  line(x1,y1,x0,y1,color);
00295 
00296     if (y1 > y0) line(x1,y0,x1,y1,color);
00297     else line(x1,y1,x1,y0,color);
00298 
00299     if(auto_up) copy_to_lcd();
00300 }
00301 
00302 void C12832::fillrect(int x0, int y0, int x1, int y1, int color)
00303 {
00304     int l,c,i;
00305     if(x0 > x1) {
00306         i = x0;
00307         x0 = x1;
00308         x1 = i;
00309     }
00310 
00311     if(y0 > y1) {
00312         i = y0;
00313         y0 = y1;
00314         y1 = i;
00315     }
00316 
00317     for(l = x0; l<= x1; l ++) {
00318         for(c = y0; c<= y1; c++) {
00319             pixel(l,c,color);
00320         }
00321     }
00322     if(auto_up) copy_to_lcd();
00323 }
00324 
00325 
00326 
00327 void C12832::circle(int x0, int y0, int r, int color)
00328 {
00329 
00330     int draw_x0, draw_y0;
00331     int draw_x1, draw_y1;
00332     int draw_x2, draw_y2;
00333     int draw_x3, draw_y3;
00334     int draw_x4, draw_y4;
00335     int draw_x5, draw_y5;
00336     int draw_x6, draw_y6;
00337     int draw_x7, draw_y7;
00338     int xx, yy;
00339     int di;
00340     //WindowMax();
00341     if (r == 0) {       /* no radius */
00342         return;
00343     }
00344 
00345     draw_x0 = draw_x1 = x0;
00346     draw_y0 = draw_y1 = y0 + r;
00347     if (draw_y0 < height()) {
00348         pixel(draw_x0, draw_y0, color);     /* 90 degree */
00349     }
00350 
00351     draw_x2 = draw_x3 = x0;
00352     draw_y2 = draw_y3 = y0 - r;
00353     if (draw_y2 >= 0) {
00354         pixel(draw_x2, draw_y2, color);    /* 270 degree */
00355     }
00356 
00357     draw_x4 = draw_x6 = x0 + r;
00358     draw_y4 = draw_y6 = y0;
00359     if (draw_x4 < width()) {
00360         pixel(draw_x4, draw_y4, color);     /* 0 degree */
00361     }
00362 
00363     draw_x5 = draw_x7 = x0 - r;
00364     draw_y5 = draw_y7 = y0;
00365     if (draw_x5>=0) {
00366         pixel(draw_x5, draw_y5, color);     /* 180 degree */
00367     }
00368 
00369     if (r == 1) {
00370         return;
00371     }
00372 
00373     di = 3 - 2*r;
00374     xx = 0;
00375     yy = r;
00376     while (xx < yy) {
00377 
00378         if (di < 0) {
00379             di += 4*xx + 6;
00380         } else {
00381             di += 4*(xx - yy) + 10;
00382             yy--;
00383             draw_y0--;
00384             draw_y1--;
00385             draw_y2++;
00386             draw_y3++;
00387             draw_x4--;
00388             draw_x5++;
00389             draw_x6--;
00390             draw_x7++;
00391         }
00392         xx++;
00393         draw_x0++;
00394         draw_x1--;
00395         draw_x2++;
00396         draw_x3--;
00397         draw_y4++;
00398         draw_y5++;
00399         draw_y6--;
00400         draw_y7--;
00401 
00402         if ( (draw_x0 <= width()) && (draw_y0>=0) ) {
00403             pixel(draw_x0, draw_y0, color);
00404         }
00405 
00406         if ( (draw_x1 >= 0) && (draw_y1 >= 0) ) {
00407             pixel(draw_x1, draw_y1, color);
00408         }
00409 
00410         if ( (draw_x2 <= width()) && (draw_y2 <= height()) ) {
00411             pixel(draw_x2, draw_y2, color);
00412         }
00413 
00414         if ( (draw_x3 >=0 ) && (draw_y3 <= height()) ) {
00415             pixel(draw_x3, draw_y3, color);
00416         }
00417 
00418         if ( (draw_x4 <= width()) && (draw_y4 >= 0) ) {
00419             pixel(draw_x4, draw_y4, color);
00420         }
00421 
00422         if ( (draw_x5 >= 0) && (draw_y5 >= 0) ) {
00423             pixel(draw_x5, draw_y5, color);
00424         }
00425         if ( (draw_x6 <=width()) && (draw_y6 <= height()) ) {
00426             pixel(draw_x6, draw_y6, color);
00427         }
00428         if ( (draw_x7 >= 0) && (draw_y7 <= height()) ) {
00429             pixel(draw_x7, draw_y7, color);
00430         }
00431     }
00432     if(auto_up) copy_to_lcd();
00433 }
00434 
00435 void C12832::fillcircle(int x, int y, int r, int color)
00436 {
00437     int i,up;
00438     up = auto_up;
00439     auto_up = 0;   // off
00440     for (i = 0; i <= r; i++)
00441         circle(x,y,i,color);
00442     auto_up = up;
00443     if(auto_up) copy_to_lcd();
00444 }
00445 
00446 void C12832::setmode(int mode)
00447 {
00448     draw_mode = mode;
00449 }
00450 
00451 void C12832::locate(int x, int y)
00452 {
00453     char_x = x;
00454     char_y = y;
00455 }
00456 
00457 
00458 
00459 int C12832::columns()
00460 {
00461     return width() / font[1];
00462 }
00463 
00464 
00465 
00466 int C12832::rows()
00467 {
00468     return height() / font[2];
00469 }
00470 
00471 
00472 
00473 int C12832::_putc(int value)
00474 {
00475     if (value == '\n') {    // new line
00476         char_x = 0;
00477         char_y = char_y + font[2];
00478         if (char_y >= height() - font[2]) {
00479             char_y = 0;
00480         }
00481     } else {
00482         character(char_x, char_y, value);
00483         if(auto_up) copy_to_lcd();
00484     }
00485     return value;
00486 }
00487 
00488 void C12832::character(int x, int y, int c)
00489 {
00490     unsigned int hor,vert,offset,bpl,j,i,b;
00491     unsigned char* zeichen;
00492     unsigned char z,w;
00493 
00494     if ((c < 31) || (c > 127)) return;   // test char range
00495 
00496     // read font parameter from start of array
00497     offset = font[0];                    // bytes / char
00498     hor = font[1];                       // get hor size of font
00499     vert = font[2];                      // get vert size of font
00500     bpl = font[3];                       // bytes per line
00501 
00502     if (char_x + hor > width()) {
00503         char_x = 0;
00504         char_y = char_y + vert;
00505         if (char_y >= height() - font[2]) {
00506             char_y = 0;
00507         }
00508     }
00509 
00510     zeichen = &font[((c -32) * offset) + 4]; // start of char bitmap
00511     w = zeichen[0];                          // width of actual char
00512     // construct the char into the buffer
00513     for (j=0; j<vert; j++) {  //  vert line
00514         for (i=0; i<hor; i++) {   //  horz line
00515             z =  zeichen[bpl * i + ((j & 0xF8) >> 3)+1];
00516             b = 1 << (j & 0x07);
00517             if (( z & b ) == 0x00) {
00518                 pixel(x+i,y+j,0);
00519             } else {
00520                 pixel(x+i,y+j,1);
00521             }
00522 
00523         }
00524     }
00525 
00526     char_x += w;
00527 }
00528 
00529 
00530 void C12832::set_font(unsigned char* f)
00531 {
00532     font = f;
00533 }
00534 
00535 void C12832::set_auto_up(unsigned int up)
00536 {
00537     if(up ) auto_up = 1;
00538     else auto_up = 0;
00539 }
00540 
00541 unsigned int C12832::get_auto_up(void)
00542 {
00543     return (auto_up);
00544 }
00545 
00546 void C12832::print_bm(Bitmap bm, int x, int y)
00547 {
00548     int h,v,b;
00549     char d;
00550 
00551     for(v=0; v < bm.ySize; v++) {   // lines
00552         for(h=0; h < bm.xSize; h++) { // pixel
00553             if(h + x > 127) break;
00554             if(v + y > 31) break;
00555             d = bm.data[bm.Byte_in_Line * v + ((h & 0xF8) >> 3)];
00556             b = 0x80 >> (h & 0x07);
00557             if((d & b) == 0) {
00558                 pixel(x+h,y+v,0);
00559             } else {
00560                 pixel(x+h,y+v,1);
00561             }
00562         }
00563     }
00564 
00565 }
00566 
00567