Отправлено trainer 16 июня 2003 г. 10:34 В ответ на: COM порт и C++... ( SOS !!! ) отправлено DIMA 16 июня 2003 г. 09:23

Пример. С виду вроде без ошибок. Правда на C.

/* Name : Sample Comm's Program - 1024 Byte Buffer - buff1024.c */
/* Written By : Craig Peacock  */
/* Copyright 1997 CRAIG PEACOCK  */
/* See http://www.senet.com.au/~cpeacock/serial.htm */
/* For More Information */
#include 
#include 
#include 
#define PORT1 0x2E8 /* Port Address Goes Here */
/* Defines Serial Ports Base Address */
/* COM1 0x3F8 */
/* COM2 0x2F8 */
/* COM3 0x3E8 */
/* COM4 0x2E8 */
#define INTVECT 0x0B /* Com Port's IRQ here */
/* (Must also change PIC setting) */
int bufferin = 0;
int bufferout = 0;
char ch;
char buffer[1025];
void interrupt (*oldport1isr)();
void interrupt PORT1INT() { /* Interrupt Service Routine (ISR) for PORT1 */
   int c;
   do {
      c = inportb(PORT1 + 5);
      if (c & 1) {
         buffer[bufferin] = inportb(PORT1);
         bufferin++;
         if (bufferin == 1024) bufferin = 0;
      }
   }while (c & 1);
   outportb(0x20,0x20);
}
void main(void) {
   int c;
   outportb(PORT1 + 1 , 0); /* Turn off interrupts - Port1 */
   oldport1isr = getvect(INTVECT); /* Save old Interrupt Vector for */
   /* later recovery */
   setvect(INTVECT, PORT1INT); /* Set Interrupt Vector Entry */
   /* COM1 - 0x0C */
   /* COM2 - 0x0B */
   /* COM3 - 0x0C */
   /* COM4 - 0x0B */
   /* PORT 1 - Communication Settings */
   outportb(PORT1 + 3 , 0x80); /* SET DLAB ON */
   outportb(PORT1 + 0 , 0x03); /* Set Baud rate - Divisor Latch Low Byte */
   /* Default 0x03 = 38,400 BPS */
   /* 0x01 = 115,200 BPS */
   /* 0x02 = 56,700 BPS */
   /* 0x06 = 19,200 BPS */
   /* 0x0C = 9,600 BPS */
   /* 0x18 = 4,800 BPS */
   /* 0x30 = 2,400 BPS */
   outportb(PORT1 + 1 , 0x00); /* Set Baud rate - Divisor Latch High Byte */
   outportb(PORT1 + 3 , 0x03); /* 8 Bits, No Parity, 1 Stop Bit */
   outportb(PORT1 + 2 , 0xC7); /* FIFO Control Register */
   outportb(PORT1 + 4 , 0x0B); /* Turn on DTR, RTS, and OUT2 */
   outportb(0x21,(inportb(0x21) & 0xF7)); /* Set Programmable Interrupt */
   /* Controller */
   /* COM1 (IRQ4) - 0xEF */
   /* COM2 (IRQ3) - 0xF7 */
   /* COM3 (IRQ4) - 0xEF */
   /* COM4 (IRQ3) - 0xF7 */
   outportb(PORT1 + 1 , 0x01); /* Interrupt when data received */
   printf("\nSample Comm's Program. Press ESC to quit \n");
   do {
      if (bufferin != bufferout){ch = buffer[bufferout];
      bufferout++;
      if (bufferout == 1024) bufferout = 0;
      printf("%c",ch);}
      if (kbhit()){c = getch();
      outportb(PORT1, c);}
   } while (c !=27);
   outportb(PORT1 + 1 , 0); /* Turn off interrupts - Port1 */
   outportb(0x21,(inportb(0x21) | 0x08)); /* MASK IRQ using PIC */
   /* COM1 (IRQ4) - 0x10 */
   /* COM2 (IRQ3) - 0x08 */
   /* COM3 (IRQ4) - 0x10 */
   /* COM4 (IRQ3) - 0x08 */
   setvect(INTVECT, oldport1isr); /* Restore old interrupt vector */
}