main.cpp

00001 #include "mbed.h"
00002 
00003 #define   BLACK            0x0000
00004 #define   NAVY            0x000F
00005 #define   DARK_GREEN    0x03E0
00006 #define   DARK_CYAN        0x03EF
00007 #define   MAROON        0x7800
00008 #define   PURPLE        0x780F
00009 #define   OLIVE            0x7BE0
00010 #define   LIGHT_GRAY    0xC618
00011 #define   DARK_GRAY        0x7BEF
00012 #define   BLUE            0x001F
00013 #define   GREEN            0x07E0
00014 #define   CYAN          0x07FF
00015 #define   RED           0xF800
00016 #define   MAGENTA        0xF81F
00017 #define   YELLOW        0xFFE0
00018 #define   WHITE            0xFFFF
00019 
00020 
00021 
00022 SPI spi (5,6,7);
00023 DigitalOut cs (13);
00024 DigitalOut rst (17);
00025 DigitalOut tcs (23);
00026 
00027 
00028 
00029 int    _hwidth = 320;
00030 int    _hheight = 240;
00031 
00032 void command(int value);
00033 void data(int value);
00034 void config(int index, int value);
00035 void lcd_movePen(int x, int y);
00036 void lcd_fillScreen(int color);
00037 
00038 void lcd_point(int x, int y, int color);
00039 void lcd_circle(int x0, int y0, int r, int color);
00040 
00041 int main() {
00042 
00043     spi.frequency(10000000);
00044     spi.format(9);
00045 
00046 
00047     cs = 0;
00048 
00049     rst = 0;
00050     wait(0.001);
00051     rst = 1;
00052     wait(0.001);
00053 
00054 
00055 
00056     config(0x07
00057            , 1 << 5 // GON
00058            | 0 << 4 // DTE
00059            | 0 << 3 // CM
00060            | 1 << 0 // D[1:0] = 01 - operate, but disp off
00061           );
00062 
00063     config(0x00, 0001);
00064 
00065     config(0x07, 1 << 5 | 1 << 4 | 0 << 3 | 3 << 0 );
00066 
00067     config(0x10, 0000);
00068 
00069     wait(0.030);
00070 
00071     config(0x02, 0x0600);
00072     config(0x01, 0x2b3f);  // 1011
00073     config(0x25, 0xa000);    // 70Hz freq
00074 
00075 
00076 
00077 
00078 
00079     while (1) {
00080 
00081         lcd_fillScreen(WHITE);
00082 
00083         lcd_fillScreen(BLUE);
00084         lcd_fillScreen(GREEN);
00085 
00086     }
00087 }
00088 
00089 
00090 void command(int value) {
00091     spi.write(value & 0xFF);
00092 }
00093 
00094 void data(int value) {
00095     spi.write(value | 0x100);
00096 }
00097 
00098 void config(int index, int value) {
00099     command(0);
00100     command(index);
00101     data(value >> 8);
00102     data(value);
00103 }
00104 
00105 
00106 void lcd_movePen(int x, int y) {
00107     config(0x4e, x & 0x00ff);
00108     config(0x4f, y & 0x01ff);
00109     command(0);
00110     command(0x22);
00111 }
00112 
00113 void lcd_fillScreen(int color) {
00114     int i = 0;
00115     int j = 0;
00116 
00117     lcd_movePen(0, 0);
00118 
00119     for (i=0; i < _hwidth; i++) {
00120         for (j=0; j< _hheight; j++) {
00121             data(color >> 8);
00122             data(color);
00123         }
00124     }
00125 }
00126 void lcd_point(int x, int y, int color) {
00127     data(color >> 8);
00128     data(color);
00129 
00130 }
00131 
00132 void lcd_circle(int x0, int y0, int r, int color) {
00133     int draw_x0, draw_y0;
00134     int draw_x1, draw_y1;
00135     int draw_x2, draw_y2;
00136     int draw_x3, draw_y3;
00137     int draw_x4, draw_y4;
00138     int draw_x5, draw_y5;
00139     int draw_x6, draw_y6;
00140     int draw_x7, draw_y7;
00141     int xx, yy;
00142     int di;
00143 
00144 
00145     draw_x0 = draw_x1 = x0;
00146     draw_y0 = draw_y1 = y0 + r;
00147     if (draw_y0 < _hheight) {
00148         lcd_point(draw_x0, draw_y0, color);        /* 90 degree */
00149     }
00150 
00151     draw_x2 = draw_x3 = x0;
00152     draw_y2 = draw_y3 = y0 - r;
00153     if (draw_y2 >= 0) {
00154         lcd_point(draw_x2, draw_y2, color);    /* 270 degree */
00155     }
00156 
00157     draw_x4 = draw_x6 = x0 + r;
00158     draw_y4 = draw_y6 = y0;
00159     if (draw_x4 < _hwidth) {
00160         lcd_point(draw_x4, draw_y4, color);        /* 0 degree */
00161     }
00162 
00163     draw_x5 = draw_x7 = x0 - r;
00164     draw_y5 = draw_y7 = y0;
00165     if (draw_x5>=0) {
00166         lcd_point(draw_x5, draw_y5, color);        /* 180 degree */
00167     }
00168 
00169     if (r == 1) {
00170         return;
00171     }
00172 
00173     di = 3 - 2*r;
00174     xx = 0;
00175     yy = r;
00176     while (xx < yy) {
00177         if (di < 0) {
00178             di += 4*xx + 6;
00179         } else {
00180             di += 4*(xx - yy) + 10;
00181             yy--;
00182             draw_y0--;
00183             draw_y1--;
00184             draw_y2++;
00185             draw_y3++;
00186             draw_x4--;
00187             draw_x5++;
00188             draw_x6--;
00189             draw_x7++;
00190         }
00191         xx++;
00192         draw_x0++;
00193         draw_x1--;
00194         draw_x2++;
00195         draw_x3--;
00196         draw_y4++;
00197         draw_y5++;
00198         draw_y6--;
00199         draw_y7--;
00200 
00201         if ( (draw_x0 <= _hwidth) && (draw_y0>=0) ) {
00202             lcd_point(draw_x0, draw_y0, color);
00203         }
00204 
00205         if ( (draw_x1 >= 0) && (draw_y1 >= 0) ) {
00206             lcd_point(draw_x1, draw_y1, color);
00207         }
00208 
00209         if ( (draw_x2 <= _hwidth) && (draw_y2 <= _hheight) ) {
00210             lcd_point(draw_x2, draw_y2, color);
00211         }
00212 
00213         if ( (draw_x3 >=0 ) && (draw_y3 <= _hheight) ) {
00214             lcd_point(draw_x3, draw_y3, color);
00215         }
00216 
00217         if ( (draw_x4 <= _hheight) && (draw_y4 >= 0) ) {
00218             lcd_point(draw_x4, draw_y4, color);
00219         }
00220 
00221         if ( (draw_x5 >= 0) && (draw_y5 >= 0) ) {
00222             lcd_point(draw_x5, draw_y5, color);
00223         }
00224         if ( (draw_x6 <= _hwidth) && (draw_y6 <= _hheight) ) {
00225             lcd_point(draw_x6, draw_y6, color);
00226         }
00227         if ( (draw_x7 >= 0) && (draw_y7 <= _hheight) ) {
00228             lcd_point(draw_x7, draw_y7, color);
00229         }
00230     }
00231 }
00232 
00233 
00234