Matrix-orbital DD-DB1 LCD/VFD Dev Board Uživatelský manuál stáhnout pdf (Strana 29)

5.2.Dallas 1-Wire

Transaction

Dec

Hex

254 200 1

FE C8 01

Flags Send Bits Receive Bits Data

Preforms a single Dallas 1-Wire transaction. Consult your device documentation for information regarding device

specific protocols. If an error is encountered, a corresponding value will be returned by the device.

Flags 1 byte, flags for transaction, see below

Send Bits 1 byte, number of bytes to be sent to the device

Receive Bits 1 byte, number of bytes expected to be received from the device

Data Variable, data to be transmitted LSB to MSB

Bit Flag Description Code Error Description

7 0 Success

6 Unused 1 Unknown Command

5 2 No Devices Found

4 0 (Future Compatibility) 3 Fatal Search Error

3 Add CRC8 to transaction

2 0 (Future Compatibility)

1 Read CRC8 from transaction

0 Reset Bus prior to transaction

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 46 47

Žádné komentáře

Matrix-orbital DD-DB1 LCD/VFD Dev Board Uživatelský manuál Strana 29