'****************************************************************************
'Module HP3457
'This module contains I/O subroutines for the HP3457.
'
'The following parameters must be present in param.inc.
'gpibinP%, the GPIB input file number
'gpiboutP%, the GPIB output file number
'hp3457addrP%, the HP3457 GPIB address
'****************************************************************************

'Open the parameter file
REM $INCLUDE: 'param.inc'

SUB hp3457cmon (c%)

'****************************************************************************
'This routine displays the voltage applied to a specified channel of the
'HP3457 DVM on the front panel.  Voltages can be monitored while the
'program is running.
'
'Input: c%, the DVM channel to read and display
'
'Inputs from param.inc:
'  gpibinP%, GPIB input file number
'  gpiboutP%, GPIB output file number
'  hp3457addrP%, the HP3457 GPIB address
'
'Zachary Wolf
'5/23/94
'****************************************************************************

'Get the GPIB I/O file numbers and the HP3457 address from the parameters
gpibin% = gpibinP%
gpibout% = gpiboutP%
hp3457addr% = hp3457addrP%

'Put the address number into a string
hp3457addr$ = STR$(hp3457addr%)

'Set the GPIB terminators
PRINT #gpibout%, "TERM IN CR LF"
PRINT #gpibout%, "TERM OUT CR LF EOI"

'Preset the HP3457
PRINT #gpibout%, "OUTPUT " + hp3457addr$ + "; PRESET"

'Set the input source to rear terminal
PRINT #gpibout%, "OUTPUT " + hp3457addr$ + "; TERM REAR"

'Set the channel to read
PRINT #gpibout%, "OUTPUT " + hp3457addr$ + "; CHAN " + STR$(c%)

'Set the A/D integration time
PRINT #gpibout%, "OUTPUT " + hp3457addr$ + "; NPLC 10"

'Trigger the reading
PRINT #gpibout%, "OUTPUT " + hp3457addr$ + "; TRIG AUTO"

END SUB

SUB hp3457init

'****************************************************************************
'This subroutine initializes the HP3457.
'
'Inputs from param.inc:
'  gpibinP%, GPIB input file number
'  gpiboutP%, GPIB output file number
'  hp3457addrP%, the HP3457 GPIB address
'
'Zachary Wolf
'4/19/94
'****************************************************************************

'Get the GPIB I/O file numbers and the HP3457 address from the parameters
gpibin% = gpibinP%
gpibout% = gpiboutP%
hp3457addr% = hp3457addrP%

'Put the address number into a string
hp3457addr$ = STR$(hp3457addr%)

'Set the GPIB terminators
PRINT #gpibout%, "TERM IN CR LF"
PRINT #gpibout%, "TERM OUT CR LF EOI"

'Message
PRINT
PRINT "Resetting the HP3457..."

'Clear the HP3457
PRINT #gpibout%, "CLEAR " + hp3457addr$

'Preset
PRINT #gpibout%, "OUTPUT " + hp3457addr$ + "; PRESET"

'Display the ID
PRINT #gpibout%, "OUTPUT " + hp3457addr$ + "; ID?"
PRINT #gpibout%, "ENTER " + hp3457addr$
LINE INPUT #gpibin%, id$
PRINT id$

END SUB