Read1Wire

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Read1Wire

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

Description:

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

Command Syntax: (USBm.dll)

USBm_Reset1Wire(device, data )

The USBm_Reset1Wire function syntax has these parts:

Part	Description
device	A zero-based index to address the appropriate USB device.
data	The function causes this variable to be changed to the value read from the 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_Read1Wire _
    Lib "USBm.dll" _
        (ByVal device As Byte, _
               ByRef data As Byte)_
   As Integer

VB Example

Dim data As Byte
USBm_Read1Wire 3, data

This code fragment addresses U4x1 device #3, and reads a byte from the 1-wire device. The read value is in "data".

C Prototype

int USBm_Read1Wire (unsigned char device, unsigned char data);

C Example

USBm_Read1Wire ( 3, data );

This code fragment addresses U4x1 device #3, and reads a byte from the 1-wire device. The read value is in "data".

Hardware: U401 USB Interface U421 USB Interface

Programming: USBm DLL Programming Download Files

Application Notes: U4x1 Application Notes Misc Applications and Information FAQ