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/* PARALLEL
periodic scheduled task that toggles parallel port on each invocation.
Originally by Michael "FZ" Barabanov
Modified by Victor Yodaiken yodaiken@cs.nmt.edu
(c) Barabanov,Yodaiken 1997,1998
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <rtl_fifo.h>
#include <rtl_time.h>
#include <rtl_sched.h>
#include <asm/io.h>
#include <linux/cons.h>
#include "common.h"
#define PERIOD 500000
RT_TASK mytask;
static int output = 0xffff;
void fun(int t) {
while (1) {
conpr("H");
outb(output, LPT_PORT);
output = ~output;
rt_task_wait();
}
}
int init_module(void)
{
printk("Starting parallel port module\n");
rt_task_init(&mytask, fun, 1, 3000, 4);
rt_task_make_periodic(&mytask, rt_get_time(), PERIOD);
return 0;
}
void cleanup_module(void)
{
rt_task_delete(&mytask);
}
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