Read1Wire

Read a byte from 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 read on the previously selected port pin.

Command Syntax: (USBm.dll)

USBm_Reset1Wire( device, dataarray )

The USBm_Reset1Wire function syntax has these parts:

Part	Description
device	A zero-based index to address the appropriate USB device.
dataarray	The function causes this variable to be changed to the value read from the bus. Minimum array size of 8.

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 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)”.

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”.

RobotBASIC

usbm_Read1Wire(ne_DeviceNumber)

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

Raw Command

See Read1WireBit