From 26b076f9eb03bf019268d2e09e90ffc8bce21867 Mon Sep 17 00:00:00 2001
From: Mart Lubbers <mart@martlubbers.net>
Date: Thu, 8 Oct 2015 20:35:16 +0200
Subject: [PATCH] initial skeleton ex11

---
 mart/ex11/ex11.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/mart/ex11/ex11.c b/mart/ex11/ex11.c
index e69de29..a9fd350 100644
--- a/mart/ex11/ex11.c
+++ b/mart/ex11/ex11.c
@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <signal.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/io.h>
+
+#include <native/task.h>
+#include <native/timer.h>
+#include <native/intr.h>
+
+#include <rtdk.h>
+
+#define LPT1IRQ 7
+#define TESTSAMPLES 20
+
+RT_TASK task;
+RTIME times[SAMPLES];
+
+void taskf(void *arg)
+{
+	//Register as interrupt handler
+	RT_INTR intr;
+	rt_intr_create(&intr, NULL, LPT1IRQ, 0);
+
+	//Measure average time of the clock
+	RTIME dur = rt_timer_read();
+	unsigned int i;
+	for(i = 0; i<TESTSAMPLES; i++){
+		rt_intr_wait(&intr, TM_INFINITE);
+	}
+	dur = rt_timer_read() / TESTSAMPLES;
+	rt_printf("%d interrupts: average time: %.2f\n", TESTSAMPLES, dur);
+
+	//Do the magic
+	while(1){
+		rt_intr_wait(&intr, TM_INFINITE);
+	}
+}
+
+int main(int argc, char* argv[])
+{
+	rt_print_auto_init(1);
+	mlockall(MCL_CURRENT | MCL_FUTURE);
+
+	// Get permission to write to parallel port
+	ioperm(0x37A, 1, 1);
+	ioperm(0x378, 1, 1);
+	outb(inb(0x37A) | 0x10, 0x37A);
+
+	rt_task_create(&task, NULL, 0, 50, 0);
+	rt_task_start(&task, &taskf, 0);
+
+	pause();
+}
-- 
2.20.1