CONTROL COMPUTER FLAGS

General Concept

The CC contains a number of controllable parameters called flags. Flags are typically parameters that are more or less constant for long periods of time but which may have to be adjusted for special purposes such as calibration. Some flags are dynamic parameters that are used as flags for debugging purposes. The format of the flags command is:

ICDPFLGS INDEX=I,MASK=M,VALUE=V

I is the index to the flags table. M defines the position of the bits that one wishes to change. V is the value of the bits. The CC code shifts V left a number of bits equal to the least significant 1 in M. The current value of the flag is AND with the inverse of M, then OR'ed with (shifted) V. Index 0 consist entirely of bit flags. Most other flags are words that a typically set in their entirety. If the default columns contains DYN, the flag reflects a dynamic state and therefore has no default.

DESCRIPTION WILL BE ADDED LATER

Flag Name	Index	Mask	Description	Default
ShtrTmo	0	1000	Monitor picture state machine for timeouts	1
MechStRd	0	200	Enable periodic mechanism status reads	1
GTSamp	0	100	Enables 100Hz photodiode sampling	1
DHCintEn	0	80	Enables DHC initialization even if load unsuccessful	0
DHCintPr	0	40	Enables DHC status reads and synchronous interrupt handling	1
HtrRdOt	0	10	Allows heater controller switch during CCD readout	0
Map2	0	4	Send CCD header(1) to camera on each exposure	0
WM_fngl	0	2	Wedge finagle. Bias position for CW moves	1
FM_fngl	0	1	Filter finagle. Bias position for CW moves	1
ha.picstat	1	FF	Picture taking state	DYN
sht_rdo	2	FFFF	Shutter readout status	DYN
gen_error	3	FFFF	Unexpected Interrupts	DYN
ha.l9_error	4	FFFF	Level 9 error word	DYN
cmd_w_lm	5	FFFF	Time command watch limit	????
ha.kdptcnv	6	FFFF	Last non-valid command	DYN
dh.ip_warn	7	FFFF	DHC warning count	DYN
dh.IP_erCt	8	FFFF	DHC error count	DYN
mp_hd2.pg	9	FFFF	CCD header page/queue addr bytes	DYN
FDW	10-25	FFFF	Default frame definition block
sa1E.kfmpos	26	FFFF	Focus motor software position	0
I0B_rep	27	FFFF	Number of 1553 commands per interrupt cycle	2
diod_th	28	FFFF	Diode threshold (if diode < diode_th) state = not illuminated	32
ergn64	29	FFFF	GT ACS error multiplier (64 gives gain =1)	64
slew_delay	30	FFFF	Ticks to delay sequence after slew = 0	60

Control Computer Operational Flags

Last Update: 9/18/97 CC Version 1.26

Name: Michael Levay