From 07e75e81aa605500c3be848277d397718f14b868 Mon Sep 17 00:00:00 2001
From: dopefishh <mart@martlubbers.net>
Date: Mon, 28 Sep 2015 12:57:06 +0200
Subject: [PATCH] Added ex09b

---
 natanael/ex09/ex09a1.c | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/natanael/ex09/ex09a1.c b/natanael/ex09/ex09a1.c
index cb7257d..86c80e6 100644
--- a/natanael/ex09/ex09a1.c
+++ b/natanael/ex09/ex09a1.c
@@ -8,7 +8,9 @@
 
 RT_INTR keypress;
 RT_TASK key_isr;
-#define KEYBOARD_IRQ 1
+#define PARPORT_IRQ 7
+
+unsigned char byte;
 
 void key_handler(void *arg)
 {
@@ -26,10 +28,12 @@ void key_handler(void *arg)
 //startup code
 void startup()
 {
-	rt_intr_create(&keypress, NULL, KEYBOARD_IRQ, I_PROPAGATE);
+    rt_intr_create(&keypress, NULL, PARPORT_IRQ, I_PROPAGATE);
+    enable_interupt();
 
 	rt_task_create(&key_isr, NULL,0,50,0);
 	rt_task_start(&key_isr, &key_handler, NULL);
+
 }
 
 void init_xenomai() {
@@ -40,6 +44,21 @@ void init_xenomai() {
   rt_print_auto_init(1);
 }
 
+void enable_interupt()
+{
+    ioperm(0x37A, 1, 1);
+    byte = inb(0x37A);
+    byte = byte | 0x10; /* hex 10 = 00010000 */
+    outb(byte, 0x37A);
+}
+
+void disable_interupt()
+{
+    byte = inb(0x37A);
+    byte = byte & 0xEF; /* hex EF = binary 11101111 */
+    outb(byte, 0x37A);
+}
+
 int main(int argc, char* argv[])
 {
   printf("\nType CTRL-C to end this program\n\n" );
@@ -52,4 +71,6 @@ int main(int argc, char* argv[])
 
   // wait for CTRL-c is typed to end the program
   pause();
-}
\ No newline at end of file
+
+  disable_interupt();
+}
-- 
2.20.1