Online Development Notebook > Index > Programming Overview > Device Commands > Write1Wire

Write1Wire - Write a byte to a 1-wire bus⁄device


VERSION 1.30+ of the firmware, VERSION 36+ of the DLL

Description:

This is a function to send a 1-wire (MicroLAN) byte write on the previously selected port pin.

Command Syntax: (USBm.dll)

USBm_Write1Wire( device, data )

The USBm_Write1Wire function syntax has these parts:

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

Remarks:

This command does not set the port direction pins or select the pin to use as the 1-wire bus - it is the Reset1Wire command that does this.


VB Declaration

Public Declare Function USBm_Write1Wire _
    Lib "USBm.dll" _
        (ByVal device As Byte, _
               ByVal data As Byte)_
  As Integer

VB Example

USBm_Write1Wire 3, 9

This code fragment addresses U4x1 device #3, and writes the value of 9 on the 1-wire bus (line to use previously selected by the Reset1Wire command).


C Prototype

int USBm_Write1Wire ( unsigned char device, unsigned char data );

C Example

USBm_Write1Wire ( 3, 9 );

This code fragment addresses U4x1 device #3, and writes the value of 9 on the 1-wire bus (line to use previously selected by the Reset1Wire command).


RobotBASIC

usbm_Write1Wire(ne_DeviceNumber,ne_Data)

Returns true if successfull, false otherwise. Writes a byte to the 1wire device.


Raw Command

See Write1WireBit


Hardware:  U401 USB Interface    U421 USB Interface   U451 USB Interface

Programming:  USBm DLL Programming    Download Files

Application Notes:  U4x1 Application Notes    Misc Applications and Information    FAQ

While every effort has been made to make sure that the information posted on this site is correct, the author can not be held liable for any damages whatsoever for losses as a result of the application of this information. Use this information at your own risk.

USBmicro can design your custom and semi-custom USB product. Email about USB design can be directed to " Robert " at usbmicro.com.

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