X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=beginners%2Fseason_junior.asm;h=9c02191752dac273f5e9dd0aed463254e8e686c4;hb=1a32d72e62a19febb9269b0270966fe98f8540be;hp=b9551528395be6cc5270a0a2a2ff3d30f900454a;hpb=e108908a7b122bb99cfc6521e0f049f587d7c0bc;p=my-code%2Fatmel.git

diff --git a/beginners/season_junior.asm b/beginners/season_junior.asm
index b955152..9c02191 100644
--- a/beginners/season_junior.asm
+++ b/beginners/season_junior.asm
@@ -3,44 +3,68 @@
 ; author: hackbard@hackdaworld.dyndns.org
 ;
 
-include "../include/2313def.inc"
+
+; at90s2313
+; setup:
+; vcc card --- vcc cam
+; rst card --- rst cam --- atmel t0 (pd4)
+; clk card --- clk cam --- atmel t1 (pd5)
+; gnd card --- gnd cam --- atmel gnd
+; i/o card --- atmel int0 (pd2)
+; i/o cam  --- atmel int1 (pd3)
+
+.include "../include/2313def.inc"
+
+; functions by now:
+;
+; stupid mode only by now. just see what cam/card do and redirect
+; this to card/cam.
+;
+; next implementation:
+; 
+; try to read one byte of card/cam communication and output via uart.
+; output time information in some way.
+;
+; future:
+;
+; buffer/parse whole strings and decide whether to send to card or not.
 
 ;
 ; interrupt vectors:
 ;
 
 ; reset
-rjmp INIT ; init routine
+rjmp INIT
 
-; int 0
-rjmp REC_FROM_CARD ; smartcard sends data, we listen
+; int0
+rjmp REC_CARD
 
-; int 1
-rjmp REC_FROM_CAM ; cam sends data, we listen
+; int1
+rjmp REC_CAM
 
 ; timer/counter capt 1
-reti ; we just count the smartcard clocks
+reti
 
 ; timer/counter compare
-reti ; not in use
+reti
 
 ; timer/counter overflow 1
-reti ; not in use
+rjmp T1_OVERFLOW
 
 ; timer/counter overflow 0
-reti ; not in use
+reti
 
 ; uart rx complete
-reti ; maybe we need it later
+reti
 
 ; uart data register empty
-reti ; maybe we need it later
+reti
 
 ; uart tx complete
-reti ; maybe we need it later
+reti
 
 ; analog comparator
-reti ; not in use
+reti
 
 ;
 ; init routine
@@ -52,8 +76,128 @@ INIT:
 ldi r16,low(RAMEND)
 out SPL,r16
 
+; enable interrupts int0,int1
+ldi r16,((1<<INT0)|(1<<INT1))
+out GIMSK,r16
+; int0/1 setup
+ldi r16,((1<<ISC01)|(1<<ISC00)|(1<<ISC10)|(1<<ISC11))
+out MCUCR,r16
+in r16,MCUCR
+sbic PORTD,PD2
+cbr r16,ISC00
+out MCUCR,r16
+sbic PORTD,PD3
+cbr r16,ISC10
+out MCUCR,r16
+
+; enable t/c overflow interrupt
+ldi r16,(1<<TOIE1)
+out TIMSK,r16
+; setup t/c
+ldi r16,((1<<CS12)|(1<<CS11)|(1<<CS10))
+out TCCR1B,r16
+
+; init bitcounter and overflow counter
+ldi r20,0 ; bitcounter
+ldi r21,0 ; register for constructing the byte
+ldi r22,0 ; overflow counter
+
+; constant 1 in r1
+ldi r16,1
+mov r1,r16
+
 ; enable interrupts (global)
-ldi r16,(1<<7)
-out SREG,r16
+sei
+
+;
+; rec_card routines
+;
+
+REC_CARD:
+
+; int0 -> input, int1 -> output
+ldi r16,(1<<DDD3)
+out DDRD,r16
+
+; decide what to do
+sbic PORTD,PD2
+rjmp REC_CARD_HIGH
+rjmp REC_CARD_LOW
+
+REC_CARD_HIGH:
+
+; output high on port to cam
+ldi r16,(1<<PD3)
+out PORTD,r16
+
+; toggle int0 sense
+in r16,MCUCR
+cbr r16,ISC00
+out MCUCR,r16
+
+reti
+
+REC_CARD_LOW:
+
+; output low on port to cam
+ldi r16,0
+out PORTD,r16
+
+; toggle int0 sense
+in r16,MCUCR
+cbr r16,ISC00
+out MCUCR,r16
+
+reti
+
+;
+; rec_cam routines
+;
+
+REC_CAM:
+
+; int1 -> input, int0 -> output
+ldi r16,(1<<DDD2)
+out DDRD,r16
+
+; decide what to do
+sbic PORTD,PD3
+rjmp REC_CAM_HIGH
+rjmp REC_CAM_LOW
+
+REC_CAM_HIGH:
+
+; output high on port to card
+ldi r16,(1<<PD2)
+out PORTD,r16
+
+; toggle int1 sense
+in r16,MCUCR
+cbr r16,ISC10
+out MCUCR,r16
+
+reti
+
+REC_CAM_LOW:
+
+; output low on port to card
+ldi r16,0
+out PORTD,r16
+
+; toggle int 1 sense
+in r16,MCUCR
+cbr r16,ISC10
+out MCUCR,r16
+
+reti
+
+;
+; t1_overflow routine
+;
+
+T1_OVERFLOW:
+
+add r22,r1 ; inc counter overflow register
 
+reti