monolyzer/timer.asm

   1 ; timer functions
   2
   3 TIMER1_INIT_NP:
   4
   5         ; clock select, no prescaler
   6         in tmp1,TCCR1B
   7         cbr tmp1,(1<<CS12)
   8         cbr tmp1,(1<<CS11)
   9         sbr tmp1,(1<<CS10)
  10         out TCCR1B,tmp1
  11
  12         ret
  13
  14 TIMER1_INIT_8:
  15
  16         ; clock select, prescaler 64
  17         in tmp1,TCCR1B
  18         cbr tmp1,(1<<CS12)
  19         sbr tmp1,(1<<CS11)
  20         cbr tmp1,(1<<CS10)
  21         out TCCR1B,tmp1
  22
  23         ret
  24
  25 TIMER1_INIT_64:
  26
  27         ; clock select, prescaler 64
  28         in tmp1,TCCR1B
  29         cbr tmp1,(1<<CS12)
  30         sbr tmp1,(1<<CS11)
  31         sbr tmp1,(1<<CS10)
  32         out TCCR1B,tmp1
  33
  34         ret
  35
  36 TIMER1_INIT_256:
  37
  38         ; clock select, prescaler 256
  39         in tmp1,TCCR1B
  40         sbr tmp1,(1<<CS12)
  41         cbr tmp1,(1<<CS11)
  42         cbr tmp1,(1<<CS10)
  43         out TCCR1B,tmp1
  44
  45         ret
  46
  47 TIMER1_INIT_1024:
  48
  49         ; clock select, prescaler 1024
  50         in tmp1,TCCR1B
  51         sbr tmp1,(1<<CS12)
  52         cbr tmp1,(1<<CS11)
  53         sbr tmp1,(1<<CS10)
  54         out TCCR1B,tmp1
  55
  56         ret
  57
  58 TIMER1_INT_ENABLE:
  59
  60         ; overflow interrupt enable
  61         in tmp1,TIMSK
  62         sbr tmp1,(1<<TOIE1)
  63         out TIMSK,tmp1
  64
  65         ret
  66
  67 TIMER1_INT_DISABLE:
  68
  69         ; overflow interrupt disable
  70         in tmp1,TIMSK
  71         cbr tmp1,(1<<TOIE1)
  72         out TIMSK,tmp1
  73
  74         ret
  75