Z-World eDisplay OP7200, Руководство пользователя

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100 eDisplay (OP7200)
4.7.8 Using System Information from the RabbitCore Module
Calibration constants for the A/D converter are stored in the simulated EEPROM area of
the flash memory. You may find it useful to retrieve the calibration constants and save
them for future use, for example, if you should need to replace the RabbitCore module on
the OP7200.
The following sample programs, found in the
Calib_Save_Retrieve
subdirectory in
SAMPLES\OP7200
, illustrate how to save or retrieve the calibration constants. Note that
both sample programs prompt you to use a serial number for the OP7200. This serial num-
ber can be any 5-digit number of your choice, and will be unique to a particular OP7200.
Do not use the MAC address on the bar code label of the RabbitCore module attached to
the OP7200 since you may at some later time use that particular RabbitCore module on
another OP7200, and the previously saved calibration data would no longer apply.
•
SAVECALIB.C
—This program demonstrates how to save your analog calibration coef-
ficients using a serial port and a PC serial utility such as Tera Term.
NOTE: Use the sample program
GETCALIB.C
to retrieve the data and rewrite it to the
single-board computer.
•
GETCALIB.C
—This program demonstrates how to retrieve your analog calibration
data to rewrite it back to the simulated EEPROM in flash with using a serial utility such
as Tera Term.
NOTE: Calibration data must be saved previously in a file by the sample program
SAVECALIB.C .
NOTE: In addition to loading the calibration constants on the replacement RabbitCore
module, you will also have to add the product information for the OP7200 to the ID
block associated with the RabbitCore module. The sample program
WRITE_IDBLOCK.C , available on the Z-World Web site at
http://www.zworld.com/support/feature_downloads.shtml, provides specific instruc-
tions and an example.