Online Development Notebook > Index > Programming Overview > Device Commands > Read1Wire

Read1Wire - Read a byte from a 1-wire bus⁄device

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

Description:

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

Command Syntax: (USBm.dll)

USBm_Reset1Wire( device, dataarray )

The USBm_Reset1Wire function syntax has these parts:

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.

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VB Declaration

Public Declare Function USBm_Read1Wire _     Lib "USBm.dll" _         (ByVal device As Byte, _                ByRef dataarray As Byte)_    As Integer

VB Example

Dim dataarray(8) As Byte     USBm_Read1Wire 3, dataarray(0)

This code fragment addresses U4x1 device #3, and reads a byte from the 1-wire device. The read value is in "dataarray(0)".

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C Prototype

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

 

C Example

USBm_Read1Wire ( 3, dataarray );

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

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RobotBASIC

usbm_Read1Wire(ne_DeviceNumber)

Returns a byte value that is read from the 1wire device.

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Raw Command

See Read1WireBit

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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

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