Hardware Design: SIE

Hardware Design: SIE Git Source Tree

1	/*******************************************************************************
2	*
3	* Filename: irq_main.c
4	* Author: Carlos Camargo
5	* Created: June 10, 2010
6	*
7	* This program is free software; you can redistribute it and/or modify
8	* it under the terms of the GNU General Public License as published by
9	* the Free Software Foundation; either version 2 of the License, or
10	* (at your option) any later version.
11	*
12	******************************************************************************/
13
14	#include "stdio.h"
15	#include "sys/types.h"
16	#include "sys/stat.h"
17	#include "fcntl.h"
18	#include <unistd.h>
19	#include <stdlib.h>
20
21	int main(int argc, char **argv) {
22	int fileNum, bytes;
23	unsigned char buf[40];
24	size_t nbytes;
25	ssize_t bytes_read;
26
27	if(argc != 2){
28	fprintf(stderr,"\nUsage: %s enable\|disable\|read \n",argv[0]);
29	}
30
31	nbytes = sizeof(int);
32	fileNum = open("/dev/irq", O_RDWR);
33	if (fileNum < 0) {
34	printf(" Unable to open device\n");
35	exit(1);
36	}
37	printf("Device opened successfully \n");
38
39	if(!strcmp(argv[1], "enable"))
40	write(fileNum, "Q", 1);
41	if(!strcmp(argv[1], "disable"))
42	write(fileNum, "S", 1);
43	if(!strcmp(argv[1], "read")){
44	read(fileNum, buf, nbytes);
45	printf("Interrupts = %d \n", ((int)(buf)));
46	}
47	if( (strcmp(argv[1], "read") != 0 ) & (strcmp(argv[1], "disable") != 0) & (strcmp(argv[1], "enable") != 0) )
48	fprintf(stderr,"\nUsage: %s enable\|disable\|read \n",argv[0]);
49
50	close(fileNum);
51
52	return (0);
53	}
54

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