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20 Documentation Number 232OPSDA1397 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5105
segment and offset addresses of the integer array where
the results of the A/D conversion will be stored.
Returns:
FALSE (zero) if the function fails, otherwise it returns
TRUE (non-zero).
B232OPSDA_ReadDigital
Purpose:
This function reads the states of all the digital I/O lines.
Syntax:
C:
BOOL B232OPSDA_ReadDigital (WORD hComDev,
BYTE modAddr, WORD* data);
Pascal:
function B232OPSDA_ReadDigital (hComDev :
word; modAddr : byte; data : Pword);
BASIC:
FUNCTION B232OPSDAReadDigital (BYVAL
hComDev AS INTEGER, BYVAL modAddr AS
INTEGER, BYVAL wdataseg AS INTEGER, BYVAL
wdataoff AS INTEGER)
Remarks:
hComDev is the handle to a serial port where the
module is connected. This is the value returned by
initComPort. modAddr is the module address. This is
always 30H (48 decimal) for the 232OSPSDA module.
data is the address of the 16-bit value where the digital
I/O values will be stored. If bit 0 (01H; 1 decimal) of data
is set, then digital input 0 is on, otherwise it is off. If bit 4
(10H; 16 decimal) of data is set, then digital output 1 is
on, otherwise it is off.
For QuickBASIC users: wdataseg and wdataoff are the
segment and offset addresses of the integer the digital
I/O values will be stored.
Returns:
FALSE (zero) if the function fails, otherwise it returns
TRUE (non-zero).