File content as of revision 3:b095be7ec287:

#include "mbed.h"
#include "C12832.h"
#include "GT20L16J1Y_font.h"
#include "utf8_table.h"

#include <stdlib.h>

/* 
    GT20L16J1Y library test program
*/

DigitalOut led(LED1);

#if defined(TARGET_LPC1768)
C12832 lcd(p5, p7, p6, p8, p11);
GT20L16J1Y_FONT font(p11, p12, p13, p10);
#elif defined(TARGET_LPC11U68)
C12832 lcd(D11, D13, D12, D7, D10);
GT20L16J1Y_FONT font(P0_21, P0_22, P1_20, P0_23);
#endif

#define numOfCharBuffer 40
uint16_t kBuf[numOfCharBuffer];

void draw_string(int offset_x, int offset_y, int width)
{
    int color;
    for(int x=0; x<width*2; x++)
    {
        for(int y=0; y<8; y++)
        {
            if (font.bitmap[x] & (1<<y))
                color = 1;
            else
                color = 0;
            lcd.pixel(x%width + offset_x, y+(8*(x/width)) + offset_y, color);
        }
    }
    lcd.copy_to_lcd();
}

int int_compar(const uint16_t *a, const uint16_t *b)
{
    if (*a < *b)
        return (-1);
    else if (*a > *b)
        return (1);
    else
        return (0);
}

int conv_utf8(char* utfBuffer, uint16_t* kutenBuffer)
{
    int ret;
    uint16_t key, *index, *pBuf;
    char *uBuf;
    
    uBuf = utfBuffer;
    pBuf = kutenBuffer;
    ret = 0;

    while (uBuf[0] != 0) {
        if (uBuf[0] >= 0x20 && uBuf[0] < 0x80) {
            // in case of ASCII
            *pBuf++ = (uint16_t)uBuf[0];
            uBuf += 1;
            ret++;
            continue;
        }
        else if ( (uBuf[0]&0xF0) != 0xE0) {
            uBuf += 1;
            continue;
        }
        // extract valid bits of UTF-8 
        key = ((uBuf[0] & 0x000F) << 12) | ((uBuf[1] & 0x003F) << 6) | (uBuf[2] & 0x003F);
        
        // search UTF-8 code from utf8_key[] table to get index of Kuten table
        index = (uint16_t *)bsearch(&key, utf8_key, (sizeof(utf8_key) / sizeof(utf8_key[0])), sizeof(uint16_t), (int (*)(const void *, const void *))int_compar);
        if (index != 0) {
            // get Kuten code
            *pBuf = utf8_value[index - utf8_key];
        }

        uBuf += 3;
        pBuf++;
        ret++;
    }
    *pBuf = 0;
    
    return ret;
}

void draw_utf8(int offset_x, int offset_y, char *buf_u)
{
    int len = conv_utf8(buf_u, kBuf);
    int xpos = 0;
    
    for(int i = 0; i < len; i++) {
        int width = font.read_kuten(kBuf[i]);
        draw_string(xpos + offset_x, offset_y, width);
        xpos += width;
    }
}

int main()
{
    led = 0;
    lcd.cls();
    draw_utf8(0, 0,  "進捗どうですか??");
    draw_utf8(0, 16, "mbedで日本語表示");
    while(1) {
        led = !led;
        wait(1.0);
    }
}