From c8b18c7c3560c9de4704291ca764cd1041228380 Mon Sep 17 00:00:00 2001
From: hackbard <hackbard>
Date: Sun, 14 Dec 2003 15:30:18 +0000
Subject: [PATCH] starting uart stuff

---
 beginners/season_junior.asm | 94 ++++++++++++++++++++++++++++---------
 1 file changed, 73 insertions(+), 21 deletions(-)

diff --git a/beginners/season_junior.asm b/beginners/season_junior.asm
index 95f8e51..8380e92 100644
--- a/beginners/season_junior.asm
+++ b/beginners/season_junior.asm
@@ -97,6 +97,11 @@ out TIMSK,r16
 ldi r16,((1<<CS12)|(1<<CS11)|(1<<CS10)|(1<<ICNC1))
 out TCCR1B,r16
 
+; configure uart - interrupt enabled when i/o
+ldi r16,3
+out UBRR,r16
+sbi UCR,TXEN
+
 ; init bitcounter and overflow counter
 ldi r20,0 ; bitcounter
 ldi r21,0 ; register for constructing the byte
@@ -134,6 +139,10 @@ rjmp REC_CARD_LOW
 
 REC_CARD_HIGH:
 
+; save counter
+in r24,ICR1L
+in r25,ICR1H
+
 ; output high on port to cam
 sbi PORTD,PD3
 
@@ -143,26 +152,31 @@ cbi TCCR1B,ICES1
 ;cbr r16,ICES1
 ;out TCCR1B,r16
 
-; build the byte ;) - still wrong!
-ori r21,1
-lsl r21
+; status tu submit
+ldi r26,1
 
-;
-; hier gehts weiter ...
-;
+; enable uart dre interrupt
+sbi UCR,UDRIE
 
 reti
 
 REC_CARD_LOW:
 
+; save counter
+in r27,ICR1L
+in r28,ICR1H
+
 ; output low on port to cam
-ldi r16,0
-out PORTD,r16
+cbi PORTD,PD3
 
-; toggle int0 sense
-in r16,MCUCR
-cbr r16,ISC00
-out MCUCR,r16
+; toggle icp sense
+sbi TCCR1B,ICES1
+
+; status to submit
+ldi r26,0
+
+; enable uart dre interrupt
+sbi UCR,UDRIE
 
 reti
 
@@ -172,10 +186,6 @@ reti
 
 REC_CAM:
 
-; int1 -> input, int0 -> output
-ldi r16,(1<<DDD2)
-out DDRD,r16
-
 ; decide what to do
 sbic PORTD,PD3
 rjmp REC_CAM_HIGH
@@ -184,8 +194,7 @@ rjmp REC_CAM_LOW
 REC_CAM_HIGH:
 
 ; output high on port to card
-ldi r16,(1<<PD2)
-out PORTD,r16
+sbi PORTD,PD6
 
 ; toggle int1 sense
 in r16,MCUCR
@@ -197,12 +206,11 @@ reti
 REC_CAM_LOW:
 
 ; output low on port to card
-ldi r16,0
-out PORTD,r16
+cbi PORTD,PD6
 
 ; toggle int 1 sense
 in r16,MCUCR
-cbr r16,ISC10
+sbr r16,ISC10
 out MCUCR,r16
 
 reti
@@ -217,3 +225,47 @@ add r22,r1 ; inc counter overflow register
 
 reti
 
+;
+; rst_cam routine
+;
+
+RST_CAM:
+
+; decide what to do
+sbic PORTD,PD2
+rjmp RST_CAM_HIGH
+rjmp RST_CAM_LOW
+
+RST_CAM_HIGH:
+
+; output high on rst port to card
+sbi PORTD,PD4
+
+; toggle int0 sense
+in r16,MCUCR
+cbr r16,ISC00
+out MCUCR,r16
+
+reti
+
+RST_CAM_LOW:
+
+; output low on rst port to cam
+cbi PORTD,PD4
+
+; toggle int0 sense
+in r16,MCUCR
+sbr r16,ISC00
+out MCUCR,r16
+
+reti
+
+;
+; uart_out routines
+;
+
+UART_OUT:
+
+;
+; hier weiter ...
+;
-- 
2.20.1