最近在STM32F407开发板上需要显示大号的字体，用SD更新太麻烦，只需要显示几个汉字即可，就是对汉字的大小有要求，调用了原子的OLED显示汉字的程序，显示小号的字体可以，但是显示大号的字体就不行了，求助各位大神
取模软件用的PCtoLCD2002,
12号，24号，32号，36号均可以正常显示，我调到50号就显示错误了。
下面是代码
void LCD_ShowChinese(u16 x,u16 y,u8 size,u8 cnum)  //x，y为坐标，cnum显示字在字库的位置
{
        u8 temp,t,t1;
        u16 y0=y;
        u8 *dzk;   
        u8 csize=(size/4+((size%4)?1:0))*(size/2);                                       
        dzk=(u8*)OLED_HZK_TBL[cnum];       
        for(t=0;t<csize;t++)
        {                                                                                                     
                temp=dzk[t];                                                 
                for(t1=0;t1<8;t1++)
                {
                        if(temp&0x80)LCD_Fast_DrawPoint(x,y,POINT_COLOR);
                        else LCD_Fast_DrawPoint(x,y,BACK_COLOR);
                        temp<<=1;
                        y++;
                        if((y-y0)==size)
                        {
                                y=y0;
                                x++;
                                break;
                        }
                }           
        }
}

字库如下：
const unsigned int OLED_HZK_TBL[4][326]=
{
{0x00,0x00,0x01,0x00,0x00,0x00,0x03,0x00,0x00,0x02,0x00,0x00,0x00,0x03,0x00,0x00,0x06,0x00,0x01,0x00,0x03,0x00,0x00,0x04,  //这个是50字体  “开”
0x00,0x01,0x00,0x03,0x00,0x00,0x08,0x00,0x01,0x00,0x03,0x00,0x00,0x18,0x00,0x01,0x00,0x03,0x00,0x00,0x30,0x00,0x01,0x00,
0x03,0x00,0x00,0x60,0x00,0x01,0x00,0x03,0x00,0x01,0xC0,0x00,0x01,0x00,0x03,0x00,0x03,0x80,0x00,0x01,0x00,0x03,0x00,0x0F,
0x00,0x00,0x01,0x00,0x03,0x00,0x3E,0x00,0x00,0x01,0x00,0x03,0x03,0xFC,0x00,0x00,0x01,0xFF,0xFF,0xFF,0xF0,0x00,0x00,0x01,
0xFF,0xFF,0xFF,0x80,0x00,0x00,0x01,0xFF,0xFF,0xFC,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,
0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,0x00,
0x01,0x00,0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,
0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,
0x00,0x01,0xFF,0xFF,0xFF,0xFF,0xFE,0x00,0x01,0xFF,0xFF,0xFF,0xFF,0xFE,0x00,0x01,0xFF,0xFF,0xFF,0xFF,0xFC,0x00,0x01,0x00,
0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x00,
0x00,0x00,0x03,0x00,0x03,0x00,0x00,0x00,0x00,0x07,0x00,0x03,0x00,0x00,0x00,0x00,0x0F,0x00,0x03,0x00,0x00,0x00,0x00,0x0F,
0x00,0x07,0x00,0x00,0x00,0x00,0x07,0x00,0x0F,0x00,0x00,0x00,0x00,0x03,0x00,0x1F,0x00,0x00,0x00,0x00,0x01,0x00,0x0F,0x00,
0x00,0x00,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},



{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x08,0x08,0x02,0x08,0x08,0x04,0x08,0x08,0x08,0x08,0x08,0x10,0x08,0x08,0xE0,    //24号字体  “开”
0x0F,0xFF,0x80,0x08,0x08,0x00,0x08,0x08,0x00,0x08,0x08,0x00,0x08,0x08,0x00,0x08,0x08,0x00,0x08,0x08,0x00,0x0F,0xFF,0xFE,   
0x0F,0xFF,0xFE,0x08,0x08,0x00,0x08,0x08,0x00,0x10,0x08,0x00,0x10,0x10,0x00,0x00,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
       
{0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x04,0x01,0x80,0x08,0x0F,0x00,0x10,0x1C,0x80,0x60,0x00,0x81,0xC2,0x00,0x87,0x02,
0x00,0xFC,0x02,0x1F,0xF0,0x04,0x3C,0x9C,0x08,0x20,0x92,0x08,0x00,0x91,0x90,0x00,0x90,0x70,0x00,0x90,0x60,0x20,0x91,0x90,
0x10,0x93,0x18,0x1C,0x9C,0x08,0x0C,0x98,0x0C,0x00,0x80,0x04,0x01,0x00,0x06,0x01,0x00,0x04,0x00,0x00,0x04,0x00,0x00,0x00},       


{0x00,0x00,0x00,0x00,0x00,0xC0,0x01,0x01,0x00,0x01,0x0E,0x00,0x01,0xF8,0x00,0x3F,0xFF,0xFE,0x21,0x20,0x00,0x01,0x10,0x02,
0x02,0x0C,0x0E,0x00,0x00,0x12,0x00,0x07,0xE4,0x0F,0xFE,0x04,0x08,0x40,0x08,0x08,0x78,0x10,0x08,0x47,0x30,0x08,0x41,0xE0,
0x10,0x41,0xE0,0x10,0x47,0x30,0x30,0x7C,0x18,0x30,0xE0,0x0C,0x10,0x00,0x0C,0x00,0x00,0x04,0x00,0x00,0x00,0x00,0x00,0x00},
};