;******************************************************************************
; VARIABLES USED BY PROGRAM
;******************************************************************************
; copyright PMB 2006

;  RAM		  description			used in
;  -----------    --------------------------    ----------------------------------------------
;  TX_BUF	= TX buffer			ISR_STX  RS_TX
;  RX_BUF	= RX buffer			ISR_SRX  RX_GET  RX_ERR
;  TX_WPTR	= TX buffer read pointer	ISR_STX  TX_GAP2 TX_CHAR TX_CRLF CTM_MSG RS_TX
;  TX_RPTR	= TX read read pointer		ISR_STX  RS_TX
;  RX_WPTR	= RX buffer read pointer	ISR_SRX  RX_ERR
;  RX_RPTR	= RX read read pointer		ISR_SRX  RX_GET  RX_ERR
;  TMP3		= temporary variable		ISR_SRX
;  VAR1_L	= temporary variable		         RX_GET
;  B1TMP1	= temporary variable		         RX_GET  TX_WTB TX_CHAR CTM_MSG

;  ISRCNT	= ISR timeout cycle counter	ISR_TO
;  TMP4		= temporary variable		ADC
;  TICK		= 10mS clock counter		RTC
;  SEC		= seconds			RTC
;  MIN		= minutes			RTC
;  HRS		= hours				RTC

; Variables used in eeprom support:
;  RXDAT	= I2C receive data		.
;  TXDAT	= I2C transmit data		.
;  I2CADD	= I2C/EEPROM address			.
;  I2CWRK	= I2C/EEPROM working register	.
;  BITCNT	= I2C/EEPROM bit counter	.
;  RDBCNT	= I2C/EEPROM read byte counter	.
;  ATTCNT	= I2C/EEPROM attempt counter	.

; Temporary variables used within subroutines.
;  TMP?		used within interrupt routines. Note that multiple interrupts may
;		occur at the same time.
;  VAR?_?	cannot be used within interrupts. These subroutines may be interrupted.

;******************************************************************************
; FLAGS USED BY HCM_*** PROGRAM
;******************************************************************************

;	FLAGS1	(gp working flags)
;	00000000
;	||||||||
;	|||||||\--	flag as verify (don't save data)	1 = verify
;	||||||\---	RTC alternate pass flag			1 = yes
;	|||||\----	ISR has occured flag			1 = ISR yes
;	||||\-----	I2C dummy write selected		1 = yes
;	|||\------	read one byte or many			1 = one
;	||\-------	SIN new message loaded to send		1 = yes
;	|\--------	SIN message sent, ready for next	1 = yes
;	\---------	eeprom access in progress		1 = yes

;	FLAGS2	(gp working flags)
;	00000000
;	||||||||
;	|||||||\--	.					1 = yes
;	||||||\---	.					1 = yes
;	|||||\----	.					1 = yes
;	||||\-----	.					1 = yes
;	|||\------	seconds roll-over			1 = yes
;	||\-------	minutes roll-over			1 = yes
;	|\--------	.					1 = yes
;	\---------	.					1 = yes

;	FLAGS3	(gp working flags)
;	00000000
;	||||||||
;	|||||||\--	identified DS1820/DS18S20		1 = yes
;	||||||\---	identified DS18B20			1 = yes
;	|||||\----	disable ISR during eeprom access	1 = yes
;	||||\-----	eeprom config V1 or V2			1 = V2
;	|||\------	DS18B20 detect failed			1 = yes
;	||\-------	temperature reading pass/fail flag	1 = pass
;	|\--------	DS18B20 initalisation failed		1 = OK
;	\---------	DS18B20 alternate pass flag		1 = yes

;	FLAGS4	(gp working flags)
;	00000000
;	||||||||
;	|||||||\--	time period re-sync required		1 = yes
;	||||||\---						1 = yes
;	|||||\----	return "all" characters from RX_GET	1 = yes
;	||||\-----						1 = yes
;	|||\------						1 = yes
;	||\-------	new RX message				1 = yes
;	|\--------	3-beeps (NO)				1 = yes
;	\---------	1-beep  (YES)				1 = yes

;	FLAGS5	(gp working flags)
;	00000000
;	||||||||
;	|||||||\--	.					1 = yes
;	||||||\---	.					1 = yes
;	|||||\----	.					1 = yes
;	||||\-----	.					1 = yes
;	|||\------	.					1 = yes
;	||\-------	.					1 = yes
;	|\--------	.					1 = yes
;	\---------	.					1 = yes

;	FLAGS6	(RS-232 gp working flags in Bank-1)
;	00000000
;	||||||||
;	|||||||\--						1 = yes
;	||||||\---						1 = yes
;	|||||\----	RX skip spaces				1 = yes
;	||||\-----	echo enabled				1 = yes
;	|||\------	RX failed				1 = yes
;	||\-------						1 = yes
;	|\--------	process aborted				1 = yes
;	\---------	TX running				1 = yes

;************

;	FLAGS8	(config flags, saved to eeprom)
;	00000000
;	||||||||
;	|||||||\--	.					1 = yes
;	||||||\---	.					1 = yes
;	|||||\----	.					1 = yes
;	||||\-----	.					1 = yes
;	|||\------	.					1 = yes
;	||\-------	.					1 = yes
;	|\--------	.					1 = yes
;	\---------	.					1 = yes

;	FLAGS9	(config flags, saved to eeprom)
;	00000000
;	||||||||
;	|||||||\--						1 = yes
;	||||||\---						1 = yes
;	|||||\----						1 = yes
;	||||\-----	eeprom config V1 or V2			1 = V2
;	|||\------						1 = yes
;	||\-------						1 = pass
;	|\--------						1 = OK
;	\---------						1 = yes

;************

;	CTRL1A	control byte
;	CTRL1B	control byte
;	CTRL1C	control flags
;	00000000
;	||||||||
;	|||||||\--	.					1 = yes
;	||||||\---	.					1 = yes
;	|||||\----	.					1 = yes
;	||||\-----	.					1 = yes
;	|||\------	.					1 = yes
;	||\-------	.					1 = yes
;	|\--------	.					1 = yes
;	\---------	.					1 = yes

;	CTRL2A	control byte
;	CTRL2B	control byte
;	CTRL2C	control flags
;	00000000
;	||||||||
;	|||||||\--	.					1 = yes
;	||||||\---	.					1 = yes
;	|||||\----	.					1 = yes
;	||||\-----	.					1 = yes
;	|||\------	.					1 = yes
;	||\-------	.					1 = yes
;	|\--------	.					1 = yes
;	\---------	.					1 = yes

;	CTRL3A	control byte
;	CTRL3B	control byte
;	CTRL3C	control flags
;	00000000
;	||||||||
;	|||||||\--	.					1 = yes
;	||||||\---	.					1 = yes
;	|||||\----	.					1 = yes
;	||||\-----	.					1 = yes
;	|||\------	.					1 = yes
;	||\-------	.					1 = yes
;	|\--------	.					1 = yes
;	\---------	.					1 = yes

;************

;	STATS1	current status flags
;	00000000
;	||||||||
;	|||||||\--	.					1 = yes
;	||||||\---	.					1 = yes
;	|||||\----	.					1 = yes
;	||||\-----	eeprom error				1 = yes
;	|||\------	internal temperature shutdown		1 = shutdown
;	||\-------	comms error				1 = yes
;	|\--------	temperature sensor status		1 = fault
;	\---------						1 = yes