This version (10 Feb 2021 20:08) was approved by Robin Getz.The Previously approved version (14 Dec 2012 16:44) is available.Diff

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AD-FMCOMMS1-EBZ Calibration EEPROM Utility

       xcomm_cal - print and set EEPROM calibration data

       xcomm_cal [-s] [-f FREQUENCY] INPUT_FILE

	Print and set EEPROM calibration data. 
	Without option - print all calibration sets available.

	-f Target frequency in MHz

	-s Initialize device drivers with best match calibration set.
	   This option is used together with the -f option.



root@linaro-ubuntu-desktop:~# git clone
root@linaro-ubuntu-desktop:~# cd fmcomms1-eeprom-cal
root@linaro-ubuntu-desktop:~# make
root@linaro-ubuntu-desktop:~# make install

Find the EEPROM

Normally, the calibration EEPROM responds to I2C Slave address 0x55, but it depends on the hardware carrier, and the slot that the card is plugged into.

To find the eeprom - use the find command.

root@linaro-ubuntu-desktop:~# find /sys/ -name eeprom

It's normally the largest value. (the smaller value is the FRU eeprom).

Query best match calibration set for a given Frequency

This specifies any shell prompt running on the target

# xcomm_cal -f 2400 -s /sys/bus/i2c/devices/0-0055/eeprom

--- Best match ENTRY 1 ---
Calibration Frequency:  2400 MHz
DAC I Phase Adjust:             357
DAC Q Phase Adjust:             0
DAC I Offset:           214
DAC Q Offset:           25
DAC I Full Scale Adj:   401
DAC Q Full Scale Adj:   401
ADC I Offset:           -2
ADC Q Offset:           -34
ADC I Gain Adj: 32853
ADC Q Gain Adj: 32768

14 Dec 2012 16:43 · Lars-Peter Clausen

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resources/eval/user-guides/ad-fmcomms1-ebz/software/linux/applications/xcomm_cal.txt · Last modified: 09 Feb 2021 16:11 by Robin Getz