RoyalTek reb-3000 用户手册

 

19 

0x04 

Clear Memory – Cold Start =1 

Use this command to enable development 

data information if you can not get the 

commands accepted. Invalid commands 

generate debug information that enables the 

user to determine the source of the 

command rejection. Common reasons for 

input command rejection are invalid 

checksum of parameter out of specified 

range. 

Table 16 contains the input values for the 

following examples: 

1.  Debug On $PSRF105,1*3E 

2.  Debug Off $PSRF 105,0*3F 

    Development Data On/Off Data Format 

Message ID 

$PSRF105 

 

PSRF105 protocol header 

Debug 

1 

 

0=Off , 1= On 

Checksum *3E 

  

<CR><LF> 

 

 

End of message termination 

 

The Checksum is the 8-bit exclusive OR of all 

the characters after $ and before *. (Not 

including $ and *) 

The serial communication protocol is designed 

to include: 

● Reliable transport of messages 

● Ease of implementation 

● Efficient implementation 

● Independence from payload 

Protocol Layers Transport Message 

 

0xA01, 

0xA2 

Two-bytes 

(15-bits) 

Up to 210-1 

(<1023 ) 

Two-bytes 

(15-bits) 

0xB0, 

0xB3 

0xYY denotes a hexadecimal byte value. 0xA0 equals 160. 

The transport layer of the protocol 

encapsulates a GPS message in two start 

characters and two stop characters. The 

values are chosen to be easily identifiable 

and such that they are unlikely to occur 

frequently in the data. In addition, the 

transport layer prefixes the message with a 

two-byte (15- bit)message length and a 

two-byte(15-bit) choice of a 15-bit values for 

length and check sum are designed such 

that both message length and check sum 

can not alias with either the stop of start 

code. 

The validation layer is of part of the transport,