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