[time-nuts] Z38XX

[Mark C. Stephens]

Thanks Ulrich, Much Appreciated, prefer to use your software.

Thanks Again,
mark

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Ulrich Bangert
Sent: Tuesday, 23 April 2013 5:36 PM
To: Time nuts
Subject: [time-nuts] Z38XX

Gentlemen,

due to the discussion that evolved concerning Z38XX i looked up the sources and found that indeed every time the current time is read using a

:PTIM:TCOD?

a

:PTIM:TCOD:FORM F2

is sent in advance to make the receiver answer in the format that Z38XX needs. I have not been aware that this could lead to NVRAM wear out but have been thinking this simply sets the format of the next output. I have changed the software so that the FORM F2 command is now only written once after program start. The software can be downloaded from the usual place but I have currently no time to test it.

My own experiences with NV memory that can only be written for a limited number of times  (EEPROM on ATMEL processors) indicates that a clever made NV writing routine would first compare the NV contents to what shall be written on a byte by byte base and write only changed bytes. 

Best regards 

Ulrich Bangert
www.ulrich-bangert.de
Ortholzer Weg 1
27243 Gross Ippener 

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