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Updating examples to Board changes, adding irq driver demo

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This commit is contained in:
Carlos Camargo
2010-06-11 08:06:13 -05:00
parent c8b70e5307
commit 5041c0eb60
41 changed files with 2263 additions and 145 deletions
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53
Examples/drivers/IRQ/irq_main.c Normal file
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/*******************************************************************************
*
* Filename: irq_main.c
* Author: Carlos Camargo
* Created: June 10, 2010
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
******************************************************************************/
#include "stdio.h"
#include "sys/types.h"
#include "sys/stat.h"
#include "fcntl.h"
#include <unistd.h>
#include <stdlib.h>
int main(int argc, char **argv) {
int fileNum, bytes;
unsigned char buf[40];
size_t nbytes;
ssize_t bytes_read;
if(argc != 2){
fprintf(stderr,"\nUsage: %s enable|disable|read \n",argv[0]);
}
nbytes = sizeof(int);
fileNum = open("/dev/irq", O_RDWR);
if (fileNum < 0) {
printf(" Unable to open device\n");
exit(1);
}
printf("Device opened successfully \n");
if(!strcmp(argv[1], "enable"))
write(fileNum, "Q", 1);
if(!strcmp(argv[1], "disable"))
write(fileNum, "S", 1);
if(!strcmp(argv[1], "read")){
read(fileNum, buf, nbytes);
printf("Interrupts = %d \n", *((int*)(buf)));
}
if( (strcmp(argv[1], "read") != 0 ) & (strcmp(argv[1], "disable") != 0) & (strcmp(argv[1], "enable") != 0) )
fprintf(stderr,"\nUsage: %s enable|disable|read \n",argv[0]);
close(fileNum);
return (0);
}