DLP Design Inc. 000RF2 Benutzerhandbuch

Rev 1.0  (January 2005)  

 

DLP-RF2 

 DLP Design, Inc.

 

4

PACKET STRUCTURE 
 

Number of bytes in the packet 
following byte 0: 5-125   
 

Each packet must contain (as a minimum) the 
number of bytes, a destination ID, Source ID 
and a command byte 

Destination ID MSByte  
ID Range: 1-65535* 

ID:1 default for new DLP-RF1 transceivers 
ID:2 default for new DLP-RF2 transceivers  
ID:0 reserved for broadcast to all transceivers 

Destination ID LSByte 

 

Source ID MSByte 
Range: 1-65535 

 

Source ID LSByte  

 

Command Byte  
Command Range: 0xA0-0xDF 

Both Command Packets and Reply Packets. 
Every packet must have a command byte. 

Data Byte(s) 

0-120 bytes of data are allowed in the packet 

 
*Note:   Each transceiver in the system must have a unique ID.  ID:0 is reserved for broadcast packets 

sent by DLP-RF2 transceivers coming out of Sleep Mode.

 

 
 

 
The EEPROM memory is a feature of the SIPP firmware and, as such, is only available if using 
the DLP-RF2 with its firmware as shipped from DLP Design. 
 
The EEPROM memory used by the SIPP firmware consists of a block of 32 bytes that reside 
within the Flash program memory of the MC9S08GT60.  The first 10 bytes (0-9) and the last 
byte (31) are reserved for storing transceiver settings and checksum.  Bytes 10 through 30 (user 
area) are available for use by user’s host software.   
 
Whenever the data in any EEPROM location is changed, the checksum location (EEPROM 
Location 31) is automatically updated.  At power up (or reset), if ever the calculated checksum 
for the first 31 bytes does not match the value at EEPROM Location 31, the Default Reset 
values for the transceiver settings are restored, and the checksum is recalculated and rewritten.  
The values in the user area are preserved. 
 
Additionally, if JP1 is shorted at power up (or reset), the default values for the transceiver 
settings are restored, and the checksum is recalculated and rewritten.  Again, values in the user 
area are preserved. 
 
The following table outlines the usage of the reserved EEPROM locations.  These values are 
read at power up, reset, or via SIPP firmware: