各位大佬，
前些天在用LCD0802做頻率計(jì)，總覺(jué)得顯示不好看，想改用12864（12832比較難買(mǎi)）。碰到的問(wèn)題是用16點(diǎn)陣字體太小，一屏四行也用不完，想改成24點(diǎn)陣的。用PCTOLCD2000建了只0-9再加上小數(shù)點(diǎn)的小字庫(kù)，如下：
const unsigned char code F12X24[][36]=
{
{0x00,0x00,0x00,0x00,0x7F,0x80,0x01,0xFF,0xE0,0x03,0x80,0x70,0x06,0x00,0x18,0x04},
{0x00,0x08,0x04,0x00,0x08,0x06,0x00,0x18,0x03,0x80,0x70,0x01,0xFF,0xE0,0x00,0x7F},
{0x80,0x00,0x00,0x00},/*"0",0*/
{0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x08,0x02,0x00,0x08,0x02,0x00,0x08,0x03},
{0xFF,0xF8,0x07,0xFF,0xF8,0x00,0x00,0x08,0x00,0x00,0x08,0x00,0x00,0x08,0x00,0x00},
{0x00,0x00,0x00,0x00},/*"1",1*/
{0x00,0x00,0x00,0x01,0xC0,0x18,0x02,0xC0,0x38,0x04,0x00,0x48,0x04,0x00,0x88,0x04},
{0x03,0x08,0x04,0x06,0x08,0x06,0x0C,0x08,0x03,0xF8,0x08,0x01,0xE0,0x78,0x00,0x00},
{0x00,0x00,0x00,0x00},/*"2",2*/
{0x00,0x00,0x00,0x03,0x80,0x70,0x03,0x80,0x70,0x04,0x00,0x08,0x04,0x08,0x08,0x04},
{0x08,0x08,0x06,0x18,0x08,0x03,0xF4,0x18,0x01,0xE7,0xF0,0x00,0x01,0xE0,0x00,0x00},
{0x00,0x00,0x00,0x00},/*"3",3*/
{0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x05,0x00,0x00,0x19,0x00,0x00,0x21,0x00,0x00},
{0xC1,0x08,0x01,0x01,0x08,0x07,0xFF,0xF8,0x07,0xFF,0xF8,0x00,0x01,0x08,0x00,0x01},
{0x08,0x00,0x01,0x00},/*"4",4*/
{0x00,0x00,0x00,0x00,0x00,0xE0,0x07,0xFC,0xD0,0x04,0x08,0x08,0x04,0x10,0x08,0x04},
{0x10,0x08,0x04,0x10,0x08,0x04,0x18,0x38,0x04,0x0F,0xF0,0x04,0x07,0xC0,0x00,0x00},
{0x00,0x00,0x00,0x00},/*"5",5*/
{0x00,0x00,0x00,0x00,0x3F,0x80,0x01,0xFF,0xE0,0x03,0x84,0x30,0x02,0x08,0x18,0x04},
{0x10,0x08,0x04,0x10,0x08,0x04,0x10,0x08,0x07,0x18,0x10,0x03,0x0F,0xF0,0x00,0x07},
{0xC0,0x00,0x00,0x00},/*"6",6*/
{0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x80,0x00,0x06,0x00,0x00,0x04,0x00,0x00,0x04},
{0x00,0xF8,0x04,0x07,0xF8,0x04,0x18,0x00,0x04,0xE0,0x00,0x07,0x00,0x00,0x06,0x00},
{0x00,0x00,0x00,0x00},/*"7",7*/
{0x00,0x00,0x00,0x01,0xC1,0xE0,0x03,0xF3,0xF0,0x06,0x36,0x10,0x04,0x18,0x08,0x04},
{0x08,0x08,0x04,0x0C,0x08,0x04,0x0C,0x08,0x06,0x16,0x18,0x03,0xF3,0xF0,0x01,0xC1},
{0xE0,0x00,0x00,0x00},/*"8",8*/
{0x00,0x00,0x00,0x00,0xF8,0x00,0x03,0xFC,0x30,0x03,0x06,0x38,0x04,0x02,0x08,0x04},
{0x02,0x08,0x04,0x02,0x08,0x04,0x04,0x10,0x03,0x08,0xF0,0x01,0xFF,0xC0,0x00,0x7F},
{0x00,0x00,0x00,0x00},/*"9",9*/
};
顯示函數(shù)如下（24點(diǎn)陣）：
else if(Char_Size ==24)
{
c=chr-'/';
OLED_Set_Pos(x, y);
for (i = 0; i < 12; i++)
OLED_WR_Byte(F12X24[c * 36 + i], OLED_DATA); //18*2
OLED_Set_Pos(x, y + 1);
for (i = 0; i < 12; i++)
OLED_WR_Byte(F12X24[c * 36 + i +12], OLED_DATA);
OLED_Set_Pos(x, y + 2);
for (i = 0; i < 12; i++)
OLED_WR_Byte(F12X24[c * 36 + i +24], OLED_DATA);
}
其中c=chr-'/'是取偏移后的值。因?yàn)樾∽謳?kù)的第一位是‘0’，ASC值48，而‘/'是47，48-47=1，正好取首字符。
工作時(shí)16點(diǎn)陣正常，但在24點(diǎn)陣時(shí)僅能顯示24點(diǎn)陣麻點(diǎn)方塊，不是所需數(shù)字。
我對(duì)C語(yǔ)言的底層編程不內(nèi)行，故特地向各位請(qǐng)教。
謝謝。
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