idgm050413.c

上位机的简单的通信程序

/*-----温度采集模块  上位机程序－－－－－－－－*/
/*-------------------------------------------*/


#include <stdio.h>
#include <dos.h>
#include <conio.h>

#define COM1BASE 0x3F8
#define	TXDATA COM1BASE
#define LCR    0x3FB
#define LSR    0x3FD
#define MCR    0x3FC

#define COUNT  100
#define SILEN  100

unsigned char SoData[COUNT];
unsigned int  crc;
unsigned char inchar;
unsigned int  Si_in=0;
unsigned char SiBuf[SILEN];

void setup_serial(void);
void send_character(char);
void makeframe1(void);
void sendframe(void);

void Init_8250(void);
void enableports(void);
void disableports(void);
void interrupt far asyncint(void);
void interrupt (*asyncvect)(void);
void Init_gVari(void);
unsigned int cal_CRC(unsigned char *puchMsg, unsigned short usDataLen);


main()
{
 unsigned char i;
 float temp, t;

	setup_serial();
	Init_8250();
	enableports();

	clrscr();
	Init_gVari();

	printf("\n\n-----9600,1,8,NONE-----");


		printf("\n\nsend ASKING frame ...\n\n");
		makeframe1();
		sendframe();
		delay(200);

		for(i=0;i<0x15;i++)
			printf(" %x ",SiBuf[i]);
		printf("\n\n");
		for(i=3;i<0x12;i=i+2)
		{
			if((SiBuf[i+1] & 0xf8) == 0)
				{	temp = (SiBuf[i+1] & 0x07) * 256 + SiBuf[i];
					t = temp * 0.0625;
					printf("T%d=%3.4f ",(i-3)/2,t);
				}
			else if((SiBuf[i+1] & 0xf8) == 0xf8)
				{	temp = (256 - SiBuf[i+1]) * 256 - SiBuf[i];
					t = temp * 0.0625 *(-1);
					printf("T%d=%3.4f ",(i-3)/2,t);
				}
		}		


	while(1)
	{
		if (kbhit())
		{	disableports();
			exit(0);
		}
	/*	printf("\n %x",Si_in);   */
	}

}

void makeframe1()
{
	SoData[0]=0x18;        /*   adress   */
	SoData[1]=0x04;        /*   function  code   */
	SoData[2]=0x00;
        SoData[3]=0x00;
        SoData[4]=0x00;
	SoData[5]=0x08;

	crc=cal_CRC(SoData,6);
        SoData[6]=(unsigned char)(crc & 0x00ff);
        SoData[7]=(unsigned char) ((crc&0xff00)>>8);
}


void sendframe(void)
{
 unsigned char pointer=0;

	for(pointer=0; pointer<8; pointer++)
	{
		send_character(SoData[pointer]);
	}
}

unsigned int cal_CRC(unsigned char *puchMsg,unsigned short usDataLen)
{
	unsigned char uchCRCHi = 0xFF ; /* 高CRC字节初始化 */
	unsigned char uchCRCLo = 0xFF ; /* 低CRC字节初始化 */
	unsigned int uIndex ;   /* CRC循环中的索引 */
	unsigned int crc;
/* CRC 高位字节值表 */
unsigned char auchCRCHi[256] = {
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40
} ;

/* CRC低位字节值表*/
unsigned char auchCRCLo[256] = {
0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
0x43, 0x83, 0x41, 0x81, 0x80, 0x40
} ;

	while (usDataLen--) /* 传输消息缓冲区 */
	{
		uIndex = uchCRCHi ^ *puchMsg++ ; /* 计算CRC */
		uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
		uchCRCLo = auchCRCLo[uIndex] ;
	}
	crc=(uchCRCHi << 8 | uchCRCLo) ;
	return crc;
}

void setup_serial(void)
{
	outportb(LCR,0x80);        /* write divide register flag */
	outportb(TXDATA,0x0C);     /* 9600 bps */
	outportb(TXDATA+1,0x00);
	outportb(LCR,0x07);        /* 1,8,NONE */
	outportb(MCR,0x03);        /* set RTS,DTR */

}

void send_character(char ch)
{
  unsigned char status;
	do
	{
		status=inportb(LSR) & 0x40;
	}while(status!=0x40);      /* wait for send shift register empty */
	outportb(TXDATA,ch);
}


void enableports(void)
{
  unsigned char B;

	asyncvect=getvect(0x0c);
	disable();
	inportb(0x3f8);
	inportb(0x3fe);
	inportb(0x3fb);
	inportb(0x3fa);

	B=inportb(0x21) & 0xef;
	outportb(0x21,B);
	setvect(0x0c,asyncint);
	enable();
}

void Init_8250()
{

	outportb(0x3fc,0x08|0x03);       /* 08---8250 INTRPT output enable */
	outportb(0x3f9,0x01);            /* receive interrupt enable  */
}

void disableports(void)
{
	disable();
	outportb(0x3f9,0x00);
	outportb(0x3fc,0x00);
	outportb(0x21,inportb(0x21) | 0x10);
	enable();
	setvect(0x0c,asyncvect);
}

void interrupt far asyncint(void)
{
  unsigned char ch;

	ch=inportb(0x3f8);
	SiBuf[Si_in]=ch;
	Si_in++;
	if(Si_in>=SILEN) Si_in=0;

	outportb(0x20,0x20);
}

void	Init_gVari(void)
{
	Si_in=0;	
}