Diff: main.cpp

Revision:

0:304c871df0a8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Dec 06 16:28:01 2009 +0000
@@ -0,0 +1,115 @@
+#include "mbed.h"
+#include "spilcd.h"
+#include "kfont8.h"
+
+#define countof(x) ( sizeof(x) / sizeof(x[0]) )
+
+SPILCD lcd(p21, p22, p23, p11, p12, p13);
+
+int csrx = 0;
+int csry = 0;
+int offsety = 0;
+bool kstate = false;
+unsigned char kbuf;
+
+void locate(int x, int y){
+    csrx = x;
+    csry = y;
+    if(csrx < 0) csrx = 0;
+    if(csry < 0) csry = 0;
+    csrx &= 31;
+    csry &= 7;
+    lcd.moveto(csrx << 3, (offsety + csry) & 7);
+};
+
+void scroll(void){
+    int i;
+    offsety = (offsety + 1) & 7;
+    lcd.cmd(0x40 | offsety << 3);
+    lcd.moveto(0, (offsety + 7) & 7);
+    for(i = 0; i < 128; i++) lcd.write(0);
+}
+
+void newline(void){
+    csrx = 0;
+    if(++csry == 8){
+        scroll();
+        csry = 7;
+    }
+    locate(csrx, csry);
+}
+
+// draw 4x8 font
+void drawfont4(unsigned char c){
+    const unsigned char *p = &font4[c << 2];
+    lcd.write(p[0]);
+    lcd.write(p[1]);
+    lcd.write(p[2]);
+    lcd.write(p[3]);
+    // cursor control
+    if(++csrx == 32) newline();
+}
+
+const unsigned char *findface(unsigned short c){
+    const unsigned char *p = NULL;
+    int i, sum;
+    for(sum = i = 0; i < countof(font8table); i++){
+        if(font8table[i].start <= c && c <= font8table[i].end){
+            p = &font8[(sum + c - font8table[i].start) << 3];
+            break;
+        }
+        sum += font8table[i].end - font8table[i].start + 1;
+    }
+    return p;
+}
+
+// draw 8x8 font
+void drawkanji(unsigned short c){
+    const unsigned char *p = findface(c);
+    if(p == NULL) return;
+
+    if(csrx >= 31) newline();
+    lcd.write(p[0]);
+    lcd.write(p[1]);
+    lcd.write(p[2]);
+    lcd.write(p[3]);
+    lcd.write(p[4]);
+    lcd.write(p[5]);
+    lcd.write(p[6]);
+    lcd.write(p[7]);
+    csrx += 2;
+    if(csrx == 32) newline();
+}
+
+void drawc(unsigned char c){
+    if(kstate){ // 2nd byte of shift-jis
+        kstate = false;
+        drawkanji(kbuf << 8 | c);
+    } else if((0x81 <= c && c <= 0x9f) || (0xe0 <= c && c <= 0xfc)){ // 1st byte of shift-jis
+        kstate = true;
+        kbuf = c;
+    } else { // 4x8font
+        drawfont4(c);
+    }
+}
+
+void draws(const unsigned char *s){
+    unsigned char c;
+    while((c = *s++) != '\0') drawc(c);
+}
+
+Serial sio(USBTX, USBRX);
+
+int main() {
+    unsigned char c;
+
+    sio.baud(115200);
+    while(1){
+        c = sio.getc();
+        if(c == 0x0d){
+            newline();
+        } else {
+            drawc(c);
+        }
+    }
+}