Trimble Outdoors 58052-00 Benutzerhandbuch
1 1 FIRMWARE UPGRADE
1 1 4 Copernicus GPS Receiver
Packet ID – 0x8B (
Start Firmware Programming)
This packet initiates firmware loading. It has two parameters. The first parameter (4-
byte value) contains the size of the firmware in bytes. This is the actual number of
bytes that will be written to Flash. The second parameter contains the starting address
in Flash where the data will be written.
byte value) contains the size of the firmware in bytes. This is the actual number of
bytes that will be written to Flash. The second parameter contains the starting address
in Flash where the data will be written.
Once the target receives this packet, it will respond with ACK and wait for the actual
data, one word at a time. Each word must be sent with the most significant byte first.
All data from the host will be written to the target in the order in which it is received.
The target will not recognize any other packets until the loading is completed. If
successful, the target will return ACK upon completion, or NAK if an error has
occurred.
data, one word at a time. Each word must be sent with the most significant byte first.
All data from the host will be written to the target in the order in which it is received.
The target will not recognize any other packets until the loading is completed. If
successful, the target will return ACK upon completion, or NAK if an error has
occurred.
C
WARNING –
The target does not check validity of the starting address nor the size. It is
the host’s responsibility to ensure that all parameters are within the system specification.
If incorrect specification of the starting address overwrites Boot Code, the module will be
unusable.
If incorrect specification of the starting address overwrites Boot Code, the module will be
unusable.
Table 11.8
Start Firmware Programming
BYTE 0
BYTE 1
BYTE 2
BYTE 3
BYTES 4-7
BYTES 8-11
BYTE 12
BYTE 13
0x02
0x00
0x8B
0x08
Size
Address
CHKSM
0x03
Table 11.9
Start Firmware Programming
Parameter
Data Type
Description
Size
unsigned long
Size of loadable data in bytes.
Address
unsigned long
Starting physical address
where data will be written to.
where data will be written to.