main.cpp

00001 #include "mbed.h"
00002 #include "spilcd.h"
00003 #include "kfont8.h"
00004 
00005 #define countof(x) ( sizeof(x) / sizeof(x[0]) )
00006 
00007 SPILCD lcd(p21, p22, p23, p11, p12, p13);
00008 
00009 int csrx = 0;
00010 int csry = 0;
00011 int offsety = 0;
00012 bool kstate = false;
00013 unsigned char kbuf;
00014 
00015 void locate(int x, int y){
00016     csrx = x;
00017     csry = y;
00018     if(csrx < 0) csrx = 0;
00019     if(csry < 0) csry = 0;
00020     csrx &= 31;
00021     csry &= 7;
00022     lcd.moveto(csrx << 3, (offsety + csry) & 7);
00023 };
00024 
00025 void scroll(void){
00026     int i;
00027     offsety = (offsety + 1) & 7;
00028     lcd.cmd(0x40 | offsety << 3);
00029     lcd.moveto(0, (offsety + 7) & 7);
00030     for(i = 0; i < 128; i++) lcd.write(0);
00031 }
00032 
00033 void newline(void){
00034     csrx = 0;
00035     if(++csry == 8){
00036         scroll();
00037         csry = 7;
00038     }
00039     locate(csrx, csry);
00040 }
00041 
00042 // draw 4x8 font
00043 void drawfont4(unsigned char c){
00044     const unsigned char *p = &font4[c << 2];
00045     lcd.write(p[0]);
00046     lcd.write(p[1]);
00047     lcd.write(p[2]);
00048     lcd.write(p[3]);
00049     // cursor control
00050     if(++csrx == 32) newline();
00051 }
00052 
00053 const unsigned char *findface(unsigned short c){
00054     const unsigned char *p = NULL;
00055     int i, sum;
00056     for(sum = i = 0; i < countof(font8table); i++){
00057         if(font8table[i].start <= c && c <= font8table[i].end){
00058             p = &font8[(sum + c - font8table[i].start) << 3];
00059             break;
00060         }
00061         sum += font8table[i].end - font8table[i].start + 1;
00062     }
00063     return p;
00064 }
00065 
00066 // draw 8x8 font
00067 void drawkanji(unsigned short c){
00068     const unsigned char *p = findface(c);
00069     if(p == NULL) return;
00070 
00071     if(csrx >= 31) newline();
00072     lcd.write(p[0]);
00073     lcd.write(p[1]);
00074     lcd.write(p[2]);
00075     lcd.write(p[3]);
00076     lcd.write(p[4]);
00077     lcd.write(p[5]);
00078     lcd.write(p[6]);
00079     lcd.write(p[7]);
00080     csrx += 2;
00081     if(csrx == 32) newline();
00082 }
00083 
00084 void drawc(unsigned char c){
00085     if(kstate){ // 2nd byte of shift-jis
00086         kstate = false;
00087         drawkanji(kbuf << 8 | c);
00088     } else if((0x81 <= c && c <= 0x9f) || (0xe0 <= c && c <= 0xfc)){ // 1st byte of shift-jis
00089         kstate = true;
00090         kbuf = c;
00091     } else { // 4x8font
00092         drawfont4(c);
00093     }
00094 }
00095 
00096 void draws(const unsigned char *s){
00097     unsigned char c;
00098     while((c = *s++) != '\0') drawc(c);
00099 }
00100 
00101 Serial sio(USBTX, USBRX);
00102 
00103 int main() {
00104     unsigned char c;
00105 
00106     sio.baud(115200);
00107     while(1){
00108         c = sio.getc();
00109         if(c == 0x0d){
00110             newline();
00111         } else {
00112             drawc(c);
00113         }
00114     }
00115 }