'****************************************************************************
'Module DAC488
'This module contains I/O subroutines for the DAC488.
'
'The following parameters must be present in param.inc.
'gpibinP%, the GPIB input file number
'gpiboutP%, the GPIB output file number
'dac488addrP%, the IOTech DAC488 GPIB address
'****************************************************************************

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

SUB dac488doutoff (d%)

'****************************************************************************
'This subroutine has the IOTech DAC488 output a low TTL level on digital line
'number d% (1 to 8).
'
'Input:
' d%, line number 1 to 8
'
'Input parameters:
' gpibinP%, GPIB input file number
' gpiboutP%, GPIB output file number
' dac488addrP%, the DAC GPIB address
'
'Zachary Wolf
'6/24/94
'****************************************************************************

'Get the GPIB I/O file numbers and the DAC address
gpibin% = gpibinP%
gpibout% = gpiboutP%
dacaddr% = dac488addrP%

'Put the DAC address in a string
dacaddr$ = STR$(dacaddr%)

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

'Get the existing output digital port configuration
PRINT #gpibout%, "OUTPUT " + dacaddr$ + ";D?"
PRINT #gpibout%, "ENTER " + dacaddr$
INPUT #gpibin%, p$

'Remove the leading D
p$ = MID$(p$, 2)

'Extract the value
p% = VAL(p$)

'Convert the line number to an integer with the appropriate bit pattern
dp% = 2 ^ (d% - 1)

'Leave existing lines alone, except make line d% low
dp% = NOT dp%
p% = p% AND dp%

'Get the integer equivalent of the bit pattern and put it in a string
p$ = LTRIM$(STR$(p%))

'Send the new port configuration
PRINT #gpibout%, "OUTPUT " + dacaddr$ + ";D" + p$ + " X"

END SUB

SUB dac488douton (d%)

'****************************************************************************
'This subroutine has the IOTech DAC488 output a high TTL level on digital line
'number d% (1 to 8).
'
'Input:
' d%, line number 1 to 8
'
'Input parameters:
' gpibinP%, GPIB input file number
' gpiboutP%, GPIB output file number
' dac488addrP%, the DAC GPIB address
'
'Zachary Wolf
'6/24/94
'****************************************************************************

'Get the GPIB I/O file numbers and the DAC address
gpibin% = gpibinP%
gpibout% = gpiboutP%
dacaddr% = dac488addrP%

'Put the DAC address in a string
dacaddr$ = STR$(dacaddr%)

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

'Get the existing output digital port configuration
PRINT #gpibout%, "OUTPUT " + dacaddr$ + ";D?"
PRINT #gpibout%, "ENTER " + dacaddr$
INPUT #gpibin%, p$

'Remove the leading D
p$ = MID$(p$, 2)

'Extract the value
p% = VAL(p$)

'Convert the line number to an integer with the appropriate bit pattern
dp% = 2 ^ (d% - 1)

'Leave existing lines alone, except make line d% high
p% = p% OR dp%

'Get the integer equivalent of the bit pattern and put it in a string
p$ = LTRIM$(STR$(p%))

'Send the new port configuration
PRINT #gpibout%, "OUTPUT " + dacaddr$ + ";D" + p$ + " X"

END SUB

SUB dac488init

'****************************************************************************
'This subroutine initializes the IOTech DAC488.
'
'Inputs from param.inc:
'  gpibinP%, GPIB input file number
'  gpiboutP%, GPIB output file number
'  dacaddrP%, the DAC GPIB address
'
'Zachary Wolf
'6/24/94
'****************************************************************************

'Get the GPIB I/O file numbers and the DAC address from the parameters
gpibin% = gpibinP%
gpibout% = gpiboutP%
dacaddr% = dac488addrP%

'Put the DAC address in a string
dacaddr$ = STR$(dacaddr%)

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

'Message
PRINT
PRINT "Resetting the DAC..."

'Reset the DAC
PRINT #gpibout%, "CLEAR " + dacaddr$

'Set the DAC terminators to LF EOI
PRINT #gpibout%, "OUTPUT " + dacaddr$ + ";Y3 X"       'LF
PRINT #gpibout%, "OUTPUT " + dacaddr$ + ";K0 X"       'EOI

'Turn the test LED on and off
PRINT #gpibout%, "OUTPUT " + dacaddr$ + ";W1 X"
PRINT #gpibout%, "OUTPUT " + dacaddr$ + ";W0 X"

'Get the DAC ID
PRINT #gpibout%, "OUTPUT " + dacaddr$ + ";U0 X"
PRINT #gpibout%, "ENTER " + dacaddr$
LINE INPUT #gpibin%, a$
PRINT a$

END SUB