Online Development Notebook > Index > ODN > USBm DLL Programming > Device Commands > WriteA

WriteA

Description:

This is a USBm.dll function that writes a byte value to port A. The possible values range from 0-255 (00h to FFh).

 

Command Syntax: (USBm.dll)

USBm_WriteA(device, data)

The USBm_WriteA function syntax has these parts:

Part Description
device A zero-based index to address the appropriate USB device.
data Byte to write to Port A.

 

Remarks:

 

 

 

VB Declaration

Public Declare Function USBm_WriteA _
    Lib "USBm.dll" _
        (ByVal device As Byte, _
        ByVal data As Byte) _
    As Integer

 

VB Example

USBm_WriteA 3, &H55

This code fragment writes the value of &H55 to port A of device 3.

 

C Example

-TBD-

Hardware:  U401 USB Interface    U421 USB Interface
Programming:  USBm DLL Programming    Download Files
Application Notes:  U4x1 Application Notes    Misc Applications and Information    FAQ