somehow t1_overflow is not executed properly ...

diff --git a/thermo/thermo.asm b/thermo/thermo.asm
index a66a491..3794546 100644 (file)
--- a/thermo/thermo.asm
+++ b/thermo/thermo.asm
@@ -21,13 +21,13 @@ reti
 reti
 
 ; T1 CAPT1
-rjmp T1_CAPTURE
+reti
 
 ; T1 COMP A
 reti
 
 ; T1 OVF1
-reti
+rjmp T1_OVERFLOW
 
 ; T0 OVF0
 reti
@@ -42,7 +42,7 @@ reti
 reti
 
 ; ANA COMP
-reti
+rjmp ANA_COMP
 
 ; PCINT
 reti
@@ -85,60 +85,147 @@ INIT:
        ; uart init
        UART_INIT:
 
-               ldi r16,51 ; 9600 bps @ 8mhz
+               ldi r16,51 ; 9k6 bps @ 8mhz
                out UBRRL, r16
                out UBRRH, r0
 
-               ldi r16,(1<<UCSZ0)|(1<<UCSZ1) ; 8 data bits, no parity, 1 stop bit
+               ldi r16,(1<<UCSZ0)|(1<<UCSZ1) ; 8n1
                out UCSRC,r16;
 
                sbi UCSRB,TXEN ; enable tx
 
        ; timer init
-       TIME_INIT:
+       TIMER_INIT:
 
-               ldi r16,(1<<CS10)|(1<<CS11) ; prescaler 1/64
+               ; prescaler 64
+               ldi r16,(1<<CS10)|(1<<CS11)
                out TCCR1B,r16
 
-               ldi r16,(1<<ICIE1) ; enable input capture interrupt
-               out TIMSK,r16
-
        ; analog comparator init
        ANA_COMP_INIT:
 
-               ; interrupt if voltage is higher, enable input capture function ot tc1
-               ldi r16,(1<<ACIS0)|(1<<ACIS0)|(1<<ACIC) ; (no analog comp interrupt!)
+               ; interrupt if voltage is higher
+               ; enable input capture function ot tc1
+               ldi r16,(1<<ACIS0)|(1<<ACIS1)
                out ACSR,r16
 
        ; output for rc element
-       ldi r17,(1<<DDB2)
-       out DDRB,r17
-       out PORTB,r0
+       RC_PIN_INIT:
+               sbi DDRD,DDD2 ; pin 2 port d is output
 
-       sei ; global interrupt enable
 
 MAIN:
+
+       ; print 'S'tart symbol via uart
+       ldi r17,0x53
+       sbis UCSRA,UDRE
        rjmp MAIN
+       out UDR,r17
+
+       ; decharge rc pin
+       cbi PORTD,PORTD2
+
+       ; reset timer counter 1 and enable overflow interrupt
+       out TCNT1H,r0
+       out TCNT1L,r0
+       ldi r17,(1<<TOIE1)      
+       out TIMSK,r17
+
+       ; global interrupt enable
+       sei
+
+       ; loop forever
+       MAIN_LOOP:
+
+               ldi r21,0
+               WLOOP1:
+                       ldi r22,0
+                       WLOOP2:
+                               inc r22
+                               cpi r22,0xff
+                               brne WLOOP2
+                       inc r21
+                       cpi r21,0xff
+                       brne WLOOP1
+
+               ; tell the world 
+
+               ; separate with a space
+               ldi r17,0x20
+               SPACE1:
+                       sbis UCSRA,UDRE
+                       rjmp SPACE1
+                       out UDR,r17
+
+               ; aco status
+               ldi r17,0x30
+               sbic ACSR,ACO
+               ldi r17,0x31
+               ACO_STAT:
+                       sbis UCSRA,UDRE
+                       rjmp ACO_STAT
+                       out UDR,r17
+
+               ; aci status
+               ldi r17,0x30
+               sbic ACSR,ACIE
+               ldi r17,0x31
+               ACI_STAT:
+                       sbis UCSRA,UDRE
+                       rjmp ACI_STAT
+                       out UDR,r17
+
+               ; pin status
+               ldi r17,0x30
+               sbic PORTD,PORTD2
+               ldi r17,0x31
+               PIN_STAT:
+                       sbis UCSRA,UDRE
+                       rjmp PIN_STAT
+                       out UDR,r17
+
+               ; ti status
+               ldi r17,0x30
+               in r23,TIMSK
+               sbrc r23,TOIE1
+               ldi r17,0x31
+               TI_STAT:
+                       sbis UCSRA,UDRE
+                       rjmp TI_STAT
+                       out UDR,r17
+
+               ; a space again for separation
+               ldi r17,0x20
+               SPACE2:
+                       sbis UCSRA,UDRE
+                       rjmp SPACE2
+                       out UDR,r17
+               
+               ; loop
+               rjmp MAIN_LOOP
 
 ;
-; timer 1 input capture interrupt routine
+; analog comparator interrupt routine
 ;
 
-T1_CAPTURE:
+ANA_COMP:
 
-       ; disable input capture interrupt
-       in r17,TIMSK
-       cbr r17,ICIE1
-       out TIMSK,r17
-
-       ; pull low the rc element
-       cbi PORTB,PORTB2
+       ; immediately disable the analog comparator interrupt
+       cbi ACSR,ACIE
 
        ; read the captured value
-       in r19,ICR1L
-       in r18,ICR1H
+       in r19,TCNT1L
+       in r18,TCNT1H
+
+       ; pull low the rc element
+       cbi PORTD,PORTD2
 
        ; uart out
+       ANA_COMP_SEND:
+               ldi r17,0x61
+               sbis UCSRA,UDRE
+               rjmp ANA_COMP_SEND
+               out UDR,r17
        LOOP_ONE:
                sbis UCSRA,UDRE
                rjmp LOOP_ONE
@@ -148,6 +235,10 @@ T1_CAPTURE:
                rjmp LOOP_TWO
                out UDR,r19
 
+       ; reset timer counter
+       out TCNT1H,r0
+       out TCNT1L,r0
+
        ; enable timer 1 overflow interrupt
        in r17,TIMSK
        sbr r17,TOIE1
@@ -161,29 +252,27 @@ T1_CAPTURE:
 
 T1_OVERFLOW:
 
-       ; disable timer 1 overflow interrupt
-       in r17,TOIE1
-       cbr r17,TOIE1
+       ; immediately disable timer 1 overflow interrupt
+       in r17,TIMSK
+       cbr r17,(1<<TOIE1)
        out TIMSK,r17
 
-       ; uart space out
-       ldi r17,0x20
-       LOOP_THREE:
+       ; uart debug out
+       ldi r17,0x4f
+       OVF_SEND:
                sbis UCSRA,UDRE
-               rjmp LOOP_TWO
+               rjmp OVF_SEND
                out UDR,r17
 
        ; reset timer counter
        out TCNT1H,r0
        out TCNT1L,r0
 
-       ; pull rc element high
-       sbi PORTB,PORTB2
+       ; enable analog comparator interrupt
+       sbi ACSR,ACIE
 
-       ; enable input capture interrupt
-       in r17,TIMSK
-       sbr r17,ICIE1
-       out TIMSK,r17
+       ; pull rc element high
+       sbi PORTD,PORTD2
 
        reti