73 lines
1.2 KiB
C
73 lines
1.2 KiB
C
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/**************************************************
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file: demo_rx.c
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purpose: simple demo that receives characters from
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the serial port and print them on the screen,
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exit the program by pressing Ctrl-C
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compile with the command: gcc demo_rx.c rs232.c -Wall -Wextra -o2 -o test_rx
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**************************************************/
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef _WIN32
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#include <Windows.h>
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#else
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#include <unistd.h>
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#endif
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#include "rs232.h"
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int main()
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{
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int i, n,
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cport_nr=0, /* /dev/ttyS0 (COM1 on windows) */
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bdrate=9600; /* 9600 baud */
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unsigned char buf[4096];
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char mode[]={'8','N','1',0};
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if(RS232_OpenComport(cport_nr, bdrate, mode, 0))
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{
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printf("Can not open comport\n");
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return(0);
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}
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while(1)
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{
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n = RS232_PollComport(cport_nr, buf, 4095);
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if(n > 0)
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{
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buf[n] = 0; /* always put a "null" at the end of a string! */
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for(i=0; i < n; i++)
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{
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if(buf[i] < 32) /* replace unreadable control-codes by dots */
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{
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buf[i] = '.';
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}
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}
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printf("received %i bytes: %s\n", n, (char *)buf);
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}
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#ifdef _WIN32
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Sleep(100);
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#else
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usleep(100000); /* sleep for 100 milliSeconds */
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#endif
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}
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return(0);
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}
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