beginners/season_junior.asm

   1 ; season - junior
   2 ;
   3 ; author: hackbard@hackdaworld.dyndns.org
   4 ;
   5
   6
   7 ; at90s2313
   8 ; setup:
   9 ; vcc card --- vcc cam
  10 ; rst card --- rst cam --- atmel t0 (pd4)
  11 ; clk card --- clk cam --- atmel t1 (pd5)
  12 ; gnd card --- gnd cam --- atmel gnd
  13 ; i/o card --- atmel int0 (pd2)
  14 ; i/o cam  --- atmel int1 (pd3)
  15
  16 include "../include/2313def.inc"
  17
  18
  19 ;
  20 ; interrupt vectors:
  21 ;
  22
  23 ; reset
  24 rjmp INIT
  25
  26 ; int0
  27 rjmp REC_CARD
  28
  29 ; int1
  30 rjmp REC_CAM
  31
  32 ; timer/counter capt 1
  33 reti
  34
  35 ; timer/counter compare
  36 reti
  37
  38 ; timer/counter overflow 1
  39 rjmp T1_OVERFLOW
  40
  41 ; timer/counter overflow 0
  42 reti
  43
  44 ; uart rx complete
  45 reti
  46
  47 ; uart data register empty
  48 reti
  49
  50 ; uart tx complete
  51 reti
  52
  53 ; analog comparator
  54 reti
  55
  56 ;
  57 ; init routine
  58 ;
  59
  60 INIT:
  61
  62 ; set stackpointer
  63 ldi r16,low(RAMEND)
  64 out SPL,r16
  65
  66 ; enable interrupts int0,int1
  67 ldi r16,((1<<INT0)|(1<<INT1))
  68 out GIMSK,r16
  69 ; int0/1 setup
  70 ldi r16,((1<<ISC01)|(1<<ISC00)|(1<<ISC11)|(1<<ISC10))
  71 out MCUCR,r16
  72 sbis PORTD,PORTD2
  73 cbi MCUCR,ISC00
  74 sbis PORTD,PORTD3
  75 cbi MCUCR,ISC10
  76
  77 ; enable t/c overflow interrupt
  78 sbi TIMSK,TOIE1
  79 ; setup t/c
  80 ldi r16,((1<<CS12)|(1<<CS11)|(1<<CS10))
  81 out TCCR1B,r16
  82
  83 ; enable interrupts (global)
  84 sei
  85
  86 ;
  87 ; rec_card routine
  88 ;
  89
  90 REC_CARD:
  91
  92 ; get port status
  93 in .... continue here .. :)