WriteDevice

Online Development Notebook > Index > ODN > USBm DLL Programming > DLL Commands > WriteDevice

WriteDevice

Description:

This is a USBm.dll function that writes raw bytes to device.

Command Syntax:

true⁄false USBm_WriteDevice(device, array)

The USBm_WriteDevice function syntax has these parts:

Part	Description
device	Valid device from 0 to the maximum number of devices found (minus 1) . Any other number results in a FALSE return.
array	Series of eight bytes to write to device.

Remarks:

Note: USBm_WriteDevice returns TRUE if the device is successfully written.

VB Declaration (USBmAPI.bas)

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

VB Example

Dim OutBuffer(10) As Byte

    OutBuffer(0) = 0
    OutBuffer(1) = 21
    OutBuffer(2) = 3
    OutBuffer(3) = 65
    OutBuffer(4) = 8
    OutBuffer(5) = 17
    OutBuffer(6) = 60
    OutBuffer(7) = 0

    USBm_WriteDevice 2, OutBuffer(0)

This code fragment shows writing a series of bytes to device two. The bytes would follow the "raw" command format.

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