Matrix Orbital VK204-25 Legacy - Manual (Page 38)

Description This command will allow you to begin communicating with the devices
on the 1-wire bus by returning a packet containing device information
for each 1-wire device on the bus in the form of:
Search Return Packet
Offset
(Bytes) Offset
(Bytes) Description
0 2
0x232A Preamble
2 1
0x8A Packet is 10 bytes long, an-
other address will follow
0x0A Packet is 10 bytes long, this
is the last address
3 1 0x31 - 1-Wire Packet Type
4 1 Error Code (0x00 for success)
5 8 1-Wire Address
13 1
CRC8 0x00 means the last address
was valid
Remembered No
8.3 Dallas 1-Wire Transaction
Syntax Hexadecimal 0xFE 0xC8 0x1 [flags] [SndBits] [RcvBits] [Data]
Decimal 254 200 1 [flags] [SndBits] [RcvBits] [Data]
Parameters Parameter Length Description
flags 1 Flags to control optional
components of the transaction.
SndBits 1 The number of bits you will be
transmitting on the bus.
RcvBits 1 The number of bits you will be
reading on the bus.
Data variable Data to be transmitted, LSB to
MSB.
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