Chapter 7 Digital I/O©National Instruments Corporation7-13DAQ-STC Technical Reference Manual7.6.2.5 Reading the Status LinesUse the following function to read the generic status lines:Function MSC_Generic_Status{return(Generic_Status);}Note These are generic status lines. Refer to the hardware manual for your DAQ boardor device for information on how these lines are used.7.6.3 Bitfield DescriptionsBits in the register bit maps are organized into bitfields. A bitfield can contain one or morebits. Only bits with contiguous locations within a register can belong to a bitfield. The highand low pairs of load and save registers for 24-bit counters are also treated as bitfields. Thedigital I/O-related bitfields are described below. Not all bitfields referred to in section 7.6,Programming Information, are listed here. To locate a particular bitfield description withinthis manual, refer to Appendix B, Register Information.Controlbits: <8..15> type: Write in: Generic_Control_Register address: 71This bitfield determines the value on the CTRL<0..7> pins. Refer to your board user manualfor a description of the function of these pins.DIO_HW_Serial_Enablebit: 9 type: Write in: DIO_Control_Register address: 11This bit enables hardware-controlled serial digital I/O:0: Disabled. Use DIO_Software_Serial_Control bit to toggle EXTSTROBE/SDCLKpin.1: Enabled. EXTSTROBE/SDCLK pin is controlled by serial hardware.DIO_HW_Serial_Startbit: 8 type: Strobe in: DIO_Control_Register address: 11Setting this bit to 1 starts the hardware-controlled serial digital I/O if enabled. This bit iscleared automatically. Related bitfields: DIO_HW_Serial_Enable.
