General Purpose Flash Memory General Purpose Flash Memory commands
XBee®/XBee-PRO SX RF Module User Guide
175
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 sends
a response in the following format to the source endpoint specified in the requesting frame.
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
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
READ (0x04)
You can use the READ command to read the specified number of bytes from the GPM location
specified. Data can be queried from only one GPM block per command.
Field name Command-specific description
GPM_CMD_ID Should be set to READ (0x04).
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 read.
GPM_START_INDEX Set to the byte index within the GPM block where the given data
should be read.
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