void LCD_Print_Pix(unsigned char x,unsigned char y,unsigned char display_mode);//1/4區(qū)域任意畫點程序

unsigned char bank1 Lcd_Buffer0[3][21] = {{0}, {0}}; //LCD顯示數據緩存區(qū)
unsigned char bank2 Lcd_Buffer1[3][21] = {{0}, {0}}; //LCD顯示數據緩存區(qū)
///////////////////////LCD任意位置寫點/////////////
//必須把LCD顯示數據緩存，這樣才可以任意畫點，RAM需要(48/6)×84個字節(jié)才能整個屏幕寫
//本程序是1/4 LCD區(qū)域內顯示任意點
//x=x軸坐標,y=y軸坐標,display_mode=0不顯示;display_mode=1顯示點;
void LCD_Print_Pix(unsigned char x,unsigned char y,unsigned char display_mode)
{
unsigned char row;
unsigned char offset;
unsigned char lcd_data;
unsigned char i;

if ( x > 41 ) return; //由于RAM空間問題，對1/4屏幕操作
if ( y > 23 ) return;
if ( display_mode > 1 ) return;

row = y / 8;
offset = y % 8;

if(x<=20)lcd_data = Lcd_Buffer0[row][x]; //從緩沖區(qū)讀LCD顯示數據
if(x>20)lcd_data = Lcd_Buffer1[row][x-21];

if (display_mode == 0)
{
lcd_data &= (~(0x01 << offset));//擦除
}
else if (display_mode== 1)
{
lcd_data|= (0x01 << offset);//畫點
}

if(x<=20)Lcd_Buffer0[row][x] = lcd_data; //LCD顯示數據保存到緩沖區(qū)
if(x>20) Lcd_Buffer1[row][x-21] = lcd_data;

lcd_data=change_char_h_l(lcd_data);//y軸顯示時高低位互換

LCD_set_XY(x,row);
////寫LCD數據///
LCD_CE=0 ; // 使能LCD
LCD_DC=1 ; // 傳送數據
for(i=0;i<8;i++)
{
if((lcd_data>>i)&0x01)
{SPI_MOSI=1;}
else
{SPI_MOSI=0;}
SPI_CLK=0;
NOP();
SPI_CLK=1;
}
LCD_CE=1 ;// 關閉LCD
/////////
}

例子：

LCD_Print_Pix(0,0,1); x顯示一個點

畫個方塊：

for(i=0;i<15;i++)
{
LCD_Print_Pix(i,0,1);
LCD_Print_Pix(i,9,1);
}
for(i=0;i<10;i++)
{
LCD_Print_Pix(0,i,1);
LCD_Print_Pix(14,i,1);
}