用C布局你的汇编代码<续>

有对上次的步进机的代码进一步规范，并抽出共性部分形成一个简单的通用功能文件comm.c，并进一步规范代码：

文件分布为bujinji.c、bujinji.h、comm.c、Makefile

bujinji.c文件：

/*

 * filename: bujinji.c

 * Copyleft (C) lizeliang

 * Date:

 *  6.9.2009

 */

#include

#include

#include

#include "bujinji.h"

//debug

//#define DEBUG

//gobal var

int buffer = 0x33;

FLAG flag = RIGHT;

//declare func

void set_speed(int speed,FLAG flag);

void do_key(int key);

void set_speed(int speed,FLAG flag)

{

outb(P8255_A,buffer);

if (flag == RIGHT) {

asm {

mov ax,buffer;

ror al,1;

mov buffer,ax;

}

} else {

asm {

mov ax,buffer;

rol al,1;

mov buffer,ax;

}

}

#ifdef DEBUG

printf("buffer = %x\n",buffer);

#endif

delay_func(speed);

}

void do_key(int key)

{

    int time = 0;

    if (key == 0)

    {

        buffer = 0x33;

        outb(P8255_A,buffer);

        return;

    } else {

#ifdef DEBUG

        printf("key = %d\t",key);

#endif        

        flag = ((key & 0x0080) == 0? RIGHT: LEFT);

#ifdef DEBUG      

        printf("flag = %d\t",flag);

#endif 

        time = (key & 0x007f);

#ifdef DEBUG      

        printf("time = %d\t",time);

#endif    

if (time&0x01) {

#ifdef DEBUG

printf("time&0x01=%d S0\t",time&0x01);

#endif        

         set_speed(S0,flag);

} else if (time&0x02) {

#ifdef DEBUG

printf("time=%d S1\t",time);

#endif        

         set_speed(S1,flag);

} else if(time&0x04) {

#ifdef DEBUG

printf("time=%d S2\t",time);

#endif        

         set_speed(S2,flag);

        } else if (time&0x08) {

         set_speed(S3,flag);

#ifdef DEBUG      

         printf("S3\t");

#endif       

        } else if (time&0x10) {

         set_speed(S4,flag);

#ifdef DEBUG      

         printf("S4\t");

#endif        

        } else if(time&0x20) {

         set_speed(S5,flag);

#ifdef DEBUG      

         printf("S5\t");

#endif        

        } else if (time&0x40) {

         set_speed(S6,flag);

#ifdef DEBUG      

         printf("S6\t");

#endif        

        } else {

#ifdef DEBUG        

         printf("time&0x02=%d\tstop\t",time&0x80);

#endif        

        }

    }

}

int main()

{

    int key;

    

    outb(P8255_MODE,0x90); //10000001,A:方式0,输出;B:方式0,输出;C高:输出,C低:输入

    outb(P8255_A,buffer); //init buffer = 33h

    while (!is_key()) {

        key = inb(P8255_C);

        do_key(key);

    }

    return 0;

}

bujinji.h文件：

#ifndef __BUJINJI_

#define __BUJINJI_

/*

 * filename: bujinji.h

 * Copyleft (C) lizeliang

 * Date:

 *  6.8.2009

 */

 

//port address

#define IOY0 0xE800

#define IOY1 0xE840

#define IOY2 0xE880

#define IOY3 0xE8C0

//address offset

#define OFFSET 4

//8255 address

#define P8255_A IOY3+0x00*OFFSET

#define P8255_B IOY3+0x01*OFFSET

#define P8255_C IOY3+0x02*OFFSET

#define P8255_MODE IOY3+0x03*OFFSET

#define SPEED 0x10

//rotray speed

#define S0 SPEED*1

#define S1 SPEED*2

#define S2 SPEED*3

#define S3 SPEED*4

#define S4 SPEED*5

#define S5 SPEED*6

#define S6 SPEED*7

//deine flag type

typedef enum {

RIGHT, /*0*/

LEFT /*1*/

}FLAG;

//declare func

extern void outb(int addr,int mode);

extern int inb(int addr);

extern void display(char *msg);

extern int is_key(void);

extern void delay_func(int dly);

#endif 

comm.c文件：

/*

 * filename: comm.c

 * Copyleft (C) lizeliang

 * Date:

 *  6.9.2009

 */

#include

#include

#include

//declare

void outb(int addr,int mode);

int inb(int addr);

void display(char *msg);

int is_key(void);

void delay_func(int dly);

void outb(int addr,int mode)

{

asm mov dx,addr;

asm mov ax,mode;

asm out dx,ax;

}

int inb(int addr)

{

asm mov dx,addr;

asm in al,dx;

asm xor ah,ah;

return (_AX);

}

void display(char *msg)

{

asm mov dx,msg;

asm mov ah,09h;

asm int 21h;

}

int is_key(void)

{

    asm mov ah,06h;

    asm mov dl,0ffh;

    asm int 21h;

    asm je nokey;

    asm mov ax,1;

    return (_AX);

nokey:

    asm mov ax,0;

    return (_AX);

}

void delay_func(int dly)

{

asm mov dx,dly;

delay:

asm mov cx,0ffffh;

thus:

asm loop thus;

asm dec dx;

asm jnz delay;

}

Makefile文件:

# Makefile for bujinji

# Copyleft (C) lizeliang

# Date:

#  6.8.2009

TARGET= bujinji

CC= tcc

CFLAGS= -B -DDEBUG

TCDIR= C:\JMSOFT\CYuYan\tc3

INCLUDE= $(TCDIR)\INCLUDE

LIB= $(TCDIR)\LIB

$(TARGET).exe: $(TARGET).obj comm.obj

$(CC) $(CFLAGS) -I$(INCLUDE) -L$(LIB) $(TARGET).obj comm.obj

$(TARGET).obj: $(TARGET).c $(TARGET).h 

$(CC) $(CFLAGS) -I$(INCLUDE) -L$(LIB) -c $(TARGET).c

comm.obj: comm.c

$(CC) $(CFLAGS) -I$(INCLUDE) -L$(LIB) -c comm.c

clean:

@del *.obj

distclean:

@del $(TARGET).exe