display.c

RToS实时嵌入式系统开放源代码。

#include "config.h"
#include "display.h"
#include <stdlib.h>

#define  DISP_MAX_X                     80       /* Maximum number of columns                          */
#define  DISP_MAX_Y                     25       /* Maximum number of rows                             */


                            unsigned char random(unsigned char seed)
{
	return ((((unsigned int) rand())^((unsigned int) rand())+TL0) % (unsigned int)seed);
}


                            void PC_DispClrScr (unsigned char color)
{
    unsigned char xdata *pscr;
    unsigned int i;


    pscr = 0x0000;
    for (i = 0; i < (DISP_MAX_X * DISP_MAX_Y); i++)
    {
        *pscr++ = ' ';
        *pscr++ = color;
    }
}


                            void PC_DispChar (unsigned char x,unsigned char y,unsigned char cc,unsigned char color)
{
    unsigned char xdata *pscr;


    pscr = (unsigned char xdata *)((unsigned int)y * DISP_MAX_X * 2 + (unsigned int )x * 2);
    *pscr++ = cc;
    *pscr = color;
}



                            void PC_DispStr (unsigned char x,unsigned char y,unsigned char *s,unsigned char color)
{
    unsigned char xdata *pscr;

    pscr = (unsigned char xdata *)((unsigned int )y * DISP_MAX_X * 2 + (unsigned int)x * 2);
    while (*s) {
        *pscr++ = *s++;
        *pscr++ = color;
    }
}