dischar.c

51单片机接受SPI口数据

#include "lcddrive.h"
#include <string.h>


unsigned char DCB_HEX_TAB[8] = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};//高位在前
unsigned char _DCB_HEX_TAB[8] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80};//低位在前


uchar G_x=0;
uchar G_y=0;

unsigned char xdata DispBuff[GUI_LCM_YMAX][GUI_LCM_XMAX/8];
unsigned char xdata DispBuff_uc1698[81];

void GUI_DispCharAt(const char ascii, int x, int y)
{
    uchar pos,i,j;	
	//查找acsii点阵
	for(pos=0; pos < strlen(asc_str); pos++)
    {
		if(asc_str[pos]==ascii) break;
	}
	
	for(i=0; i<HEIGHT_ASICC; i++)
		for(j=0; j<WIDTH_ASCII; j++)
		{
			if( asc_code[pos][i] & (0x01<<j) )
				DispBuff[y+i][(x+j) >> 3] |= _DCB_HEX_TAB[(x+j) & 0x07];
			else
				DispBuff[y+i][(x+j) >> 3] &= (~_DCB_HEX_TAB[(x+j) & 0x07]);
		}
}

void GUI_DispStringAt(const char *pascii, int x, int y) 
{
	char c0;

	G_x=x;
	G_y=y;

  
	//只显示字符
	while(*pascii)
	{
		c0=*pascii++;	
		GUI_DispCharAt(c0, G_x, G_y);
		G_x+=8;
	}
  
	G_x=0;		//全局变量G_x清零
	G_y=0; 		//全局变量G_x清零
    
}