Matrix-orbital LK204-24-USB Manual de usuario descargar pdf (Pagina 32)

Table 18: 1-Wire Error Codes

Code Description

0x00 Success

0x01 Unknown 1-Wire command

0x02 No devices on the bus

0x03 Fatal search error

6.4.2 Search command (254 C8 2)

This is used to ﬁnd the addresses of all 1-Wire devices on the bus. After this command the display will

return one or more “Display return protocol” packets containing either an error code or addresses of 1-wire

packets. The structure of these packets is shown in the Table below.

Table 19: Search Return Packet

Offset

(Bytes)

Length

(Bytes)

Description

0 2 0x232A - Preamble.

2 1 0x8A - Packet 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.

7 Miscellaneous Commands

The commands listed in this chapter don’t readily ﬁt in any of the other categories, or are used in more

than one category.

7.1 Command List

Some commands, marked with an “R”, may be "Remembered" to set new defaults that will be in effect

each time the unit is powered on.

Matrix Orbital LK204-24-USB 28

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 48 49

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