more control

[my-code/atmel.git] / monolyzer / timer.asm

diff --git a/monolyzer/timer.asm b/monolyzer/timer.asm
index 2f14b69..3327547 100644 (file)
--- a/monolyzer/timer.asm
+++ b/monolyzer/timer.asm
@@ -3,8 +3,29 @@
 TIMER1_INIT:
 
        ; clock select, prescaler 8
-       ldi tmp1,0x02
+       in tmp1,TCCR1B
+       cbr tmp1,(1<<CS12)
+       sbr tmp1,(1<<CS11)
+       cbr tmp1,(1<<CS10)
        out TCCR1B,tmp1
 
        ret
 
+TIMER1_INT_ENABLE:
+
+       ; overflow interrupt enable
+       in tmp1,TIMSK
+       sbr tmp1,(1<<TOIE1)
+       out TIMSK,tmp1
+
+       ret
+
+TIMER1_INT_DISABLE:
+
+       ; overflow interrupt disable
+       in tmp1,TIMSK
+       cbr tmp1,(1<<TOIE1)
+       out TIMSK,tmp1
+
+       ret
+