make timer depend on HZ define

3 files changed, 9 insertions, 7 deletions

diff --git a/kernel/time/include/time/timer.h b/kernel/time/include/time/timer.h
index e59e374..1fa64d5 100644
--- a/kernel/time/include/time/timer.h
+++ b/kernel/time/include/time/timer.h
@@ -1,7 +1,7 @@
 #ifndef TIMER_H
 #define TIMER_H
 
-#define HZ 100
+#define HZ 10
 
 void timer_init();
 void timer_start();
diff --git a/kernel/time/mcu/atmega2560/timer.c b/kernel/time/mcu/atmega2560/timer.c
index 663df02..e3ab6eb 100644
--- a/kernel/time/mcu/atmega2560/timer.c
+++ b/kernel/time/mcu/atmega2560/timer.c
@@ -10,7 +10,9 @@ void timer_init() {
 
   TCCR3B = (1 << WGM32); // turn on CTC mode:
   TCCR3B |= (1 << CS32) | (0 << CS31) | (1 << CS30); // set to 1024 prescaler
-  OCR3A = 770;
+
+  unsigned int hz_counter = F_CPU / (2 * 1024 * HZ) - 1;
+  OCR3A = hz_counter;
   sei();
 }
 
@@ -23,7 +25,7 @@ void timer_stop() {
 }
 
 ISR(TIMER3_COMPA_vect, ISR_NAKED) {
-  SAVE_CONTEXT(); 
+  SAVE_CONTEXT();
   sched_tick();
   sei();
   RESTORE_CONTEXT();
diff --git a/main.c b/main.c
index ca27358..e9fc28e 100644
--- a/main.c
+++ b/main.c
@@ -10,11 +10,11 @@
 void blink( char id) {
   while(1) {
     debug_led(id,1);
-    yield();
-    WAIT_CYCLES(5000);
+    //yield();
+    WAIT_CYCLES(50000);
     debug_led(id,0);
-    yield();
-    WAIT_CYCLES(5000);
+    //yield();
+    WAIT_CYCLES(50000);
   }
 }