ADLINK PCI-7256 - Manual (Page 39)

C/C++ DOS Libraries • 31
5.3 _7256_DO
@ Description
This function is used to write data to digital output port which can energize
the Latching relay SET/RESET coils. You can control all 16 RELAYs through
_7256_DO by using this function. Althought the register map of latching
relays is 32 bit width, we use 16-bit access to control the latching relay
through this function. Bit ‘1’ represent the SET condition (1,0), and Bit ‘0’
represent the RESET condition (0,1).
@ Syntax
U16 _7256_DO (U16 boardID, U16 doData)
@ Argument
boardID :Board ID to the specific borad.
doData :value which will be written to digital output
port.
@ Return Code
ERR_NoError, ERR_BoardNoInit
5.4 _7256_DO_Read_Back
@ Description
This function is used to read data back from digital output port control by
7256_DO function. There are 16-bit digital outputs on the PCI-7256. You can
get back all RELAYs status (SET or RESET) by using this function.
@ Syntax
U16 _7256_DO_Read_Back (U16 boardID, U16 *doReadBackData)
@ Argument
boardID : Board ID to the specific borad.
diReadBackData : value read back from digital output
port. ‘0’ represents the latching relay is under RESET
condition and ‘1’ represents the latching relay is under
SET condition.
@ Return Code
ERR_NoError, ERR_BoardNoInit