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HP E1430A User’s Guide
e1430_reset_lbus
e1430_reset_lbus
Reset the local bus
SYNOPSIS
#include "e1430.h"
SHORTSIZ16 e1430_reset_lbus(groupID, state);
SHORTSIZ16 groupID;
SHORTSIZ15 state;
DESCRIPTION
E1430_reset_lbus puts the local bus into reset or takes it out of reset depending on
whether state is E1430_RESET_LBUS_ON or E1430_RESET_LBUS_OFF,
respectively. Adjacent modules using the local bus must all be put into reset and
then, after they all are in reset, must all taken out of reset to avoid glitches in the
local bus data. When HP E1430As are used with the HP E1485A measurement
controller, the HP E1485A must be reset while all of the HP E1430As are being held
in reset to avoid initial glitches in the local bus data. The HP E1430As should be
taken out of reset only after the first e1430_arm_module is issued. The correct
way to reset the local bus is as follows:
e1430_reset_lbus(groupID, E1430_RESET_LBUS_ON); /* hold E1430s in
reset */
lbus_control(LBUS_CTL_RESET, 0); /* reset the E1485 lbus */
....
....
e1430_arm_module(groupID);/* first arming */
/ *remove reset from E1430s, has no effect after first time */
e1430_reset_lbus(groupID, E1430_RESET_LBUS_OFF);
GroupID is the group ID of a single HP E1430Aor group of HP E1430As that
was returned by a call to \fRe1430_create_module_group\fR.
RETURN VALUE
All functions return a value of 0 when successful. Otherwise an error will be
returned. The error, ERR1430_NO_GROUP, is returned if an illegal value of the
groupID parameter is used (i.e. one that was not obtained by a call to
e1430_create_module_group(E1430)).
SEE ALSO
e1430_create_module_group(E1430).
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