demo of arm timer irq

1 files changed, 11 insertions, 3 deletions

diff --git a/interrupts.c b/interrupts.c
index c6e3f17..62c644b 100644
--- a/interrupts.c
+++ b/interrupts.c
@@ -1,5 +1,6 @@
 #include "io.h"
 #include "svc_interface.h"
+#include "armclock.h"
 
 void __attribute__((noreturn)) setup(void);
 
@@ -58,9 +59,16 @@ void generic_handler(void)
 
 void irq_handler(void)
 {
-  puts("irq happened");
-
-  while(1);
+  if (armclk_irq_pending())
+    {
+      puts("<<irq from timer>>");
+      armclk_set_timer_match_timeout(0x00100000);
+    }
+  else
+    {
+      puts("unknown irq");
+      while(1);
+    }
 }
 
 void fiq_handler(void)