XBee‐PRO®900HP/XBee‐PRO®XSCRFModules
©2014DigiInternationalInc. 88
Assuming all transmissions were successful, the following API packets would be output the source node's
serial interface:
7E 0007 8B 01 FFFE 00 00 00 76
7E 001A 91 0013A200407402AC FFFE E6 E6 0023 C105 C1 81 00 002A 0000 0000 39
WRITE (0x02) and ERASE_THEN_WRITE (0x03):
The WRITE command writes the specified bytes to the GPM location specified. Before writing bytes to a GPM
block it is important that the bytes have been erased previously. The ERASE_THEN_WRITE command
performs an ERASE of the entire GPM block specified with the GPM_BLOCK_NUM field prior to doing a WRITE.
WRITE _RESPONSE (0x82) and ERASE_THEN_WRITE_RESPONSE(0x83):
When a WRITE or ERASE_THEN_WRITE command request has been unicast to a node, that node will send a
response in the following format to the source endpoint specified in the requesting frame.
Example:
To write 15 bytes of incrementing data to flash block 22 of a target radio with serial number of
0x0013a200407402ac a WRITE packet should be formatted as follows (spaces added to delineate fields):
7E 002B 11 01 0013A200407402AC FFFE E6 E6 0023 C105 00 C0 02 00 0016 0000 000F 0102030405060708090A0B0C0D0E0F C5
Assuming all transmissions were successful and that flash block 22 was previously erased, the following API
packets would be output the source node's serial interface:
7E 0007 8B 01 FFFE 00 00 00 76
7E 001A 91 0013A200407402AC FFFE E6 E6 0023 C105 C1 82 00 0016 0000 0000 4C
Field Name
Command-Specific Description
GPM_CMD_ID
Should be set to WRITE (0x02) or ERASE_THEN_WRITE (0x03)
GPM_OPTIONS
There are currently no options defined for this command. Set this field
to 0.
GPM_BLOCK_NUM
Set to the index of the GPM block that should be written.
GPM_START_INDEX
Set to the byte index within the GPM block where the given data
should be written.
GPM_NUM_BYTES
Set to the number of bytes specified in the GPM_DATA field. Only one
GPM block can be operated on per command. For this reason,
GPM_START_INDEX + GPM_NUM_BYTES cannot be greater than
the GPM block size. It is also important to remember that the number
of bytes sent in an explicit API frame (including the GPM command
fields) cannot exceed the maximum payload size of the radio. The
maximum payload size can be queried with the NP AT command.
GPM_DATA
The data to be written.
Field Name
Command-Specific Description
GPM_CMD_ID
Should be set to WRITE_RESPONSE (0x82) or
ERASE_THEN_WRITE_RESPONSE (0x83)
GPM_STATUS
A 1 in the least significant bit indicates an error occurred. All other bits
are reserved at this time.
GPM_BLOCK_NUM
Matches the parameter passed in the request frame.
GPM_START_INDEX
Matches the parameter passed in the request frame.
GPM_NUM_BYTES
The number of bytes in the GPM_DATA field. For this command, this
field will be set to 0.
GPM_DATA
No data bytes are specified for these commands.
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