stm32控制lcd寫字符，畫線，漢字等
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對于畫直線，在lcd上由于顯示的粒度問題，就區(qū)別到x,y軸上的步調(diào)問題。涉及到步調(diào)問題，就牽扯到，斜率問題。因此，畫線算法就算將就完成了，還要注意相對于lcd來說，x,y軸又是什么一個方向?，F(xiàn)實(shí)現(xiàn)一個比較粗略的畫線算法。
本文引用地址：http://www.ex-cimer.com/article/201612/325183.htmvoid lcd_line(u16 x1,u16 y1,u16 x2,u16 y2,u16 Color)
{
u16 temp,x,y;
Set_direction(0);
if((x1 == x2) && (y1 == y2))
{
//畫原點(diǎn)
LCD_open_windows(x1,y1,1,1);
}
else if(abs(y1-y2)>abs(x1-x2))
{
//走y軸,同時判斷大小，進(jìn)行交換
if(y1 > y2)
{
x1 ^= x2 ^= x1 ^= x2;
y1 ^= y2 ^= y1 ^= y2;
}
for( y = y1 ; y <= y2; y ++)
{
x = x1 + (y - y1) * (x2 - x1) / (y2 - y1);
LCD_ColorPoint(x ,y ,Color);
}
}
else
{
if(x1 > x2)
{
x1 ^= x2 ^= x1 ^= x2;
y1 ^= y2 ^= y1 ^= y2;
}
for( x = x1 ; x <= x2; x ++)
{
y = y1 + (x - x1) * (y2 - y1) / (x2 - x1);
LCD_ColorPoint(x ,y ,Color);
}
}
}
主要是要關(guān)注，斜率問題，以及了解lcd的屬性，斜率大于1，要知道，走y軸，才能密集x軸，而不會出現(xiàn)一個明顯的斷點(diǎn)。
2、寫ascii。
對應(yīng)寫ascii，可以先做一個字模,取對應(yīng)的字模，如8 * 16,由于lcd寫ascii的原理，主要是打點(diǎn),因此，可以對A寫一個簡單的程序
unsigned char code_A[]=
{
/*------------------------------------------------------------------------------
;若數(shù)據(jù)亂碼，請檢查字模格式設(shè)置，注意選擇正確的取模方向和字節(jié)位順序。
;源文件/文字: A
;寬×高（像素）: 8×16
;字模格式/大小:單色點(diǎn)陣液晶字模，橫向取模，字節(jié)正序/16字節(jié)
;數(shù)據(jù)轉(zhuǎn)換日期 : 2015/2/10 15:00:31
------------------------------------------------------------------------------*/
//0x08,0x10,0x01,//寬的像素?cái)?shù),高的像素?cái)?shù)，寬的字節(jié)數(shù)，參數(shù)設(shè)置可選
0x00,0x00,0x00,0x08,0x08,0x0C,0x14,0x14,0x12,0x1E,0x22,0x21,0x21,0x73,0x00,0x00,
};
//8 * 16的ascii字符
void lcd_ascii(u16 x,u16 y,const u8 *str,u16 Color)
{
u8 i , j;
u8 temp;
for (i = 0;i < 16 ; i ++)
{
temp = str[i];
for(j = 0 ;j < 8 ; j ++)
{
if((temp >> (7 - j) ) & 0x01 == 0x01)
{
LCD_ColorPoint(x + (j) ,y + i,Color);
}
}
}
}
主要原理是，取得要顯示的每一位值，是1寫對應(yīng)的值即可。
unsigned char code_A_24x48[]=
{
/*------------------------------------------------------------------------------
;若數(shù)據(jù)亂碼，請檢查字模格式設(shè)置，注意選擇正確的取模方向和字節(jié)位順序。
;源文件/文字: A
;寬×高（像素）: 24×48
;字模格式/大小:單色點(diǎn)陣液晶字模，橫向取模，字節(jié)正序/144字節(jié)
;數(shù)據(jù)轉(zhuǎn)換日期 : 2015/2/10 15:09:19
------------------------------------------------------------------------------*/
//0x18,0x30,0x03,//寬的像素?cái)?shù),高的像素?cái)?shù)，寬的字節(jié)數(shù)，參數(shù)設(shè)置可選
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x00,0x00,0x38,0x00,0x00,0x3C,0x00,0x00,0x7C,
0x00,0x00,0x7C,0x00,0x00,0x7C,0x00,0x00,0x6C,0x00,0x00,0xCE,0x00,0x00,0xCE,0x00,
0x00,0xCE,0x00,0x00,0xC6,0x00,0x01,0x87,0x00,0x01,0x87,0x00,0x01,0x87,0x00,0x01,
0x83,0x00,0x03,0x03,0x80,0x03,0x03,0x80,0x03,0x03,0x80,0x03,0x03,0x80,0x06,0x01,
0xC0,0x07,0xFF,0xC0,0x06,0x01,0xC0,0x06,0x01,0xC0,0x0C,0x01,0xE0,0x0C,0x00,0xE0,
0x0C,0x00,0xE0,0x0C,0x00,0xE0,0x18,0x00,0xF0,0x18,0x00,0x70,0x18,0x00,0x70,0x18,
0x00,0x70,0x38,0x00,0x78,0xFE,0x01,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};
void lcd_ascii_24x48(u16 x,u16 y,const u8 *str,u16 Color)
{
u8 i,j,k;
u8 buffer[3];
for (i = 0;i < 48 ; i ++)
{
for(j = 0; j < 3 ; j ++)
{
buffer[j] = str[i * 3 + j];
}
for( j = 0; j < 3 ; j ++)
{
for (k = 0 ; k < 8 ; k++)
{
if( ( buffer[j] >> (7 - k)) & 0x01 == 0x01)
{
LCD_ColorPoint(x + 8 * (j) + k,y + i,Color);
}
}
}
}
}
3、寫漢字
unsigned char yuan[]=
{
/*------------------------------------------------------------------------------
;若數(shù)據(jù)亂碼，請檢查字模格式設(shè)置，注意選擇正確的取模方向和字節(jié)位順序。
;源文件/文字:袁
;寬×高（像素）: 48×48
;字模格式/大小:單色點(diǎn)陣液晶字模，橫向取模，字節(jié)正序/288字節(jié)
;數(shù)據(jù)轉(zhuǎn)換日期 : 2015/2/10 13:17:47
------------------------------------------------------------------------------*/
//0x30,0x30,0x06,//寬的像素?cái)?shù),高的像素?cái)?shù)，寬的字節(jié)數(shù)，參數(shù)設(shè)置可選
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,
0x00,0x00,0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x00,0xE0,0x00,0x00,0x00,0x00,
0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0xC0,0x0C,0x00,0x00,0x00,0x00,0xC0,0x1E,0x00,
0x00,0x1F,0xFF,0xFF,0xFF,0x00,0x00,0x08,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0xC0,
0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x40,0x00,0x00,
0x00,0xC0,0x00,0xE0,0x07,0xFF,0xFF,0xFF,0xFF,0xF0,0x03,0xFF,0xFF,0xFF,0xFF,0xF8,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x00,0x00,0x10,0x00,0x00,0x06,0x00,0x00,
0x3C,0x00,0x00,0x07,0xFF,0xFF,0xFC,0x00,0x00,0x07,0x00,0x00,0x38,0x00,0x00,0x07,
0x00,0x00,0x38,0x00,0x00,0x07,0x00,0x00,0x38,0x00,0x00,0x07,0x00,0x00,0x38,0x00,
0x00,0x07,0x00,0x00,0x38,0x00,0x00,0x07,0x00,0x00,0x38,0x00,0x00,0x07,0xFF,0xFF,
0xF8,0x00,0x00,0x07,0xFF,0xFF,0xF8,0x00,0x00,0x07,0x0F,0x10,0x31,0x80,0x00,0x04,
0x1E,0x18,0x03,0xC0,0x00,0x00,0x3C,0x08,0x07,0xE0,0x00,0x00,0x78,0x0C,0x0F,0x00,
0x00,0x00,0xF8,0x06,0x1C,0x00,0x00,0x01,0xF8,0x07,0x70,0x00,0x00,0x07,0xB8,0x03,
0xC0,0x00,0x00,0x0E,0x38,0x01,0xC0,0x00,0x00,0x1C,0x38,0x00,0xE0,0x00,0x00,0x70,
0x38,0x00,0x70,0x00,0x01,0xC0,0x38,0x10,0x7C,0x00,0x03,0x00,0x38,0xE0,0x3F,0x00,
0x0C,0x00,0x3B,0xC0,0x0F,0xE0,0x10,0x00,0x3F,0x00,0x07,0xFC,0x00,0x00,0x7E,0x00,
0x03,0xF0,0x00,0x00,0x38,0x00,0x00,0xE0,0x00,0x00,0x10,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};
//lcd顯示48 * 48字符
void lcd_show_48x48(u16 x,u16 y,const u8 *str,u16 Color)
{
u8 i,j,k;
u8 buffer[6];
for (i = 0;i < 48 ; i ++)
{
for(j = 0; j < 6 ; j ++)
{
buffer[j] = str[i * 6 + j];
}
for( j = 0; j < 6 ; j ++)
{
for (k = 0 ; k < 8 ; k++)
{
if( ( buffer[j] >> 7 - k) & 0x01 == 0x01)
{
LCD_ColorPoint(x + 8 * (j) + k,y + i,Color);
}
}
}
}
}
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