|Online Development Notebook > Index > Programming Overview > Device Commands > Read1Wire|
Read1Wire - Read a byte from a 1-wire bus⁄device
VERSION 1.30+ of the firmware, VERSION 36+ of the DLL
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:
|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.|
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.
|Public Declare Function USBm_Read1Wire _|
Lib "USBm.dll" _
(ByVal device As Byte, _
ByRef dataarray As Byte)_
|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)".
|int USBm_Read1Wire ( unsigned char device, unsigned char * data );|
|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".
Returns a byte value that is read from the 1wire device.
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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