City Theatrical 5792 SHoW DMX Neo, Руководство пользователя

Страница: 27 / 40

7 Serial Configuration Protocol
This section describes the protocol and command set for the config mode. When the radio is
put into config mode it expects specific commands to read or write the config registers and it
will reply with an acknowledgement. Baud for config communication occurs at the speed of the
selected operating mode. (1.25Mbps for SHoW DMX Classic and 250Kbps for SHoW DMX Neo
mode)
Figure 4 below shows the bit definitions for the commands and replies. The first byte sent to
the radio includes one read/write bit and 7 address bits. The read/write bit is 0 for write and 1
for read. The radio replies with an acknowledgement byte for both read and write commands
with the MSB (most significant bit) being a 1 for an ACK or a 0 for a NACK. If the response is an
ACK then the lower 7 bits define the length of the following data in number of bytes. If the
command was a write then the lower 7 bits will be zero. If it was a read then it will be 1 for
single byte registers but can be longer for reads of other lengths of registers. If the response is a
NACK then the lower 7 bits will define error codes. The possible errors and their codes are
defined in Table 11.
Table 11: Config Error Codes
Value Error Description
0x01 Illegal Address
0x02 Illegal Value