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DO_ReadPort

@ Description

Read back the output digital data from the specified digital output port.

@ Cards Support

6208, 6308, 7200, 7250/51, 7252

@ Syntax

I16 DO_ReadPort (U16 CardNumber, U16 Port, U32 *Value)

@ Parameter

CardNumber : The card id of the card that want to perform this operation.
Port : Digital output port number. The valid value:
        PCI-6208V/16V/08A: 0
        PCI-6308V/08A: 0
        PCI-7200/cPCI-7200: 0
        PCI-7250/51: 0 through 3
        cPCI-7252: 0
Value : Returns the digital data read from the specified output port.
        PCI-6208V/16V/08A: 4-bit data
        PCI-6308V/08A: 4-bit data
        PCI-7200/cPCI-7200: 32-bit data
        PCI-7250/51: 8-bit data
        cPCI-7252: 8-bit data

@ Return Code

NoError, ErrorInvalidCardNumber, ErrorCardNotRegistered, ErrorFuncNotSupport, ErrorInvalidIoChannel