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- /* Name : Sample Comm's Program - Polled Version - termpoll.c */
- /* Written By : Craig Peacock <cpeacock@senet.com.au> */
- /* Date : Saturday 22nd February 1997 */
- /* Copyright 1997 CRAIG PEACOCK <cpeacock@senet.com.au> */
- /* See http://www.senet.com.au/~cpeacock/serial1.htm */
- /* For More Information */
- #include <dos.h>
- #include <stdio.h>
- #include <conio.h>
- #include <time.h>
- #define PORT1 0x3F8
- #define TTL 2
- /* Defines Serial Ports Base Address */
- /* COM1 0x3F8 */
- /* COM2 0x2F8 */
- /* COM3 0x3E8 */
- /* COM4 0x2E8 */
- void main(void)
- {
- int c;
- int ch;
- time_t now;
- outportb(PORT1 + 1 , 0); /* Turn off interrupts - Port1 */
- /* 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 = 57,600 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 */
- printf("\nSample Comm's Program. Press ESC to quit \n");
- do { c = inportb(PORT1 + 5); /* Check to see if char has been */
- /* received. */
- if (c & 1) {
- ch = inportb(PORT1); /* If so, then get Char */
- outportb(PORT1, ch);
- printf("%c",ch);
- } /* Print Char to Screen */
- if (kbhit()){
- ch = getch(); /* If key pressed, get Char */
- outportb(PORT1, ch);
- printf("%c", ch);
- now = time(0);
- while (1 == 1) {
- if (time(0) - now > TTL) {
- printf("\n\n\n Raspunsul nu a ajuns se retrimite... [%c] \n\n\n", ch);
- outportb(PORT1, ch);
- now = time(0);
- } else {
- c = inportb(PORT1 + 5); /* Check to see if char has been */
- /* received. */
- if (c & 1) {
- char ch2 = inportb(PORT1); /* If so, then get Char */
- if (ch2 == ch) {
- printf("\n\n\n Raspunsul a ajuns\n\n\n");
- break;
- }
- }
- }
- }
- } /* Send Char to Serial Port */
- } while (ch !=27); /* Quit when ESC (ASC 27) is pressed */
- }
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