From 88c493e6fa217e36649fc9236d3cb5d3cd6dc989 Mon Sep 17 00:00:00 2001
From: hackbard <hackbard>
Date: Sun, 14 Jan 2007 19:37:44 +0000
Subject: [PATCH] added thermo app

---
 thermo/thermo.asm | 189 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 189 insertions(+)
 create mode 100644 thermo/thermo.asm

diff --git a/thermo/thermo.asm b/thermo/thermo.asm
new file mode 100644
index 0000000..a66a491
--- /dev/null
+++ b/thermo/thermo.asm
@@ -0,0 +1,189 @@
+;
+; thermo - getting temperature using analog comparator
+;
+; author: hackbard@hackdaworld.org
+;
+
+; specify device
+.include "../include/tn2313def.inc"
+
+;
+; interrupts
+;
+
+; RESET
+rjmp INIT
+
+; INT0
+reti
+
+; INT1
+reti
+
+; T1 CAPT1
+rjmp T1_CAPTURE
+
+; T1 COMP A
+reti
+
+; T1 OVF1
+reti
+
+; T0 OVF0
+reti
+
+; UART RX
+reti
+
+; UART UDRE
+reti
+
+; UART TX
+reti
+
+; ANA COMP
+reti
+
+; PCINT
+reti
+
+; T1 COMP B
+reti
+
+; T0 COMP A
+reti
+
+; T0 COMP B
+reti
+
+; USI START
+reti
+
+; USI OVF
+reti
+
+; EE READY
+reti
+
+; WDT OVF
+reti
+
+;
+; init function
+;
+
+INIT:
+
+	; stackpointer
+	ldi r16,low(RAMEND)
+	out SPL,r16
+
+	; zero to register 0
+	ldi r17,0
+	mov r0,r17
+
+	; uart init
+	UART_INIT:
+
+		ldi r16,51 ; 9600 bps @ 8mhz
+		out UBRRL, r16
+		out UBRRH, r0
+
+		ldi r16,(1<<UCSZ0)|(1<<UCSZ1) ; 8 data bits, no parity, 1 stop bit
+		out UCSRC,r16;
+
+		sbi UCSRB,TXEN ; enable tx
+
+	; timer init
+	TIME_INIT:
+
+		ldi r16,(1<<CS10)|(1<<CS11) ; prescaler 1/64
+		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!)
+		out ACSR,r16
+
+	; output for rc element
+	ldi r17,(1<<DDB2)
+	out DDRB,r17
+	out PORTB,r0
+
+	sei ; global interrupt enable
+
+MAIN:
+	rjmp MAIN
+
+;
+; timer 1 input capture interrupt routine
+;
+
+T1_CAPTURE:
+
+	; disable input capture interrupt
+	in r17,TIMSK
+	cbr r17,ICIE1
+	out TIMSK,r17
+
+	; pull low the rc element
+	cbi PORTB,PORTB2
+
+	; read the captured value
+	in r19,ICR1L
+	in r18,ICR1H
+
+	; uart out
+	LOOP_ONE:
+		sbis UCSRA,UDRE
+		rjmp LOOP_ONE
+		out UDR,r18
+	LOOP_TWO:
+		sbis UCSRA,UDRE
+		rjmp LOOP_TWO
+		out UDR,r19
+
+	; enable timer 1 overflow interrupt
+	in r17,TIMSK
+	sbr r17,TOIE1
+	out TIMSK,r17
+
+	reti
+
+;
+; timer 1 overflow interrupt function
+;
+
+T1_OVERFLOW:
+
+	; disable timer 1 overflow interrupt
+	in r17,TOIE1
+	cbr r17,TOIE1
+	out TIMSK,r17
+
+	; uart space out
+	ldi r17,0x20
+	LOOP_THREE:
+		sbis UCSRA,UDRE
+		rjmp LOOP_TWO
+		out UDR,r17
+
+	; reset timer counter
+	out TCNT1H,r0
+	out TCNT1L,r0
+
+	; pull rc element high
+	sbi PORTB,PORTB2
+
+	; enable input capture interrupt
+	in r17,TIMSK
+	sbr r17,ICIE1
+	out TIMSK,r17
+
+	reti
+
-- 
2.20.1