Copying eeprom contents

[BLL]

Hi, I am storing info in 30 eeprom locations. There are a mixture of floats, bools, int8's etc.
I want to be able to send that data down a serial port to the computer to which it is connected (a Raspberry Pi), so I can save it to disc and then be able to send it back again to rewrite the eeprom locations.
I am using a 18LF2620.
What's the best way of doing it please?

Thanks
Brian

[temtronic]

hmm.. there is no 'best' way... but if the 30 locations are 8bits ( byte) simply just send them.... now the 'fun' part is the 'other end' that will have to decide which bytes are 'floats',bools,bytes, words.....
Obviously the 'bools' should be 'grouped' into 8 bits ( a byte) so as to look like one byte.
Now do you need error checking like CRC ? That will complicate things a tad...

Jay

[BLL]

Thanks for your reply but Oh dear!!
All I want to do is to store the contents of those 30 locations and be able to write those 30 locations back. No processing is needed as it's simply to allow the eeprom data to be replaced if needed, so is it not possible to do a memcpy?
I could send each datatype in sequence but it's a lot of code to achieve it!

Thanks for your help.

Brian

[asmboy]

make a string[30]

create int16 checksum=0;

read each eeprom location into the string

serial printf the bytes of the string sequentially
using %X format yielding 2 bytes of hex per eeprom location.
as you increment- add the byte value to checksum.

when all 60 byes of hex are written - output the 16 bits as 4 bytes of
checksum -in hex also.

reverse the process to restore eeprom- but first read into a string in sram and verify the simple checksum. it's all you need with a short serial connection and a low baud rate...

[RF_Developer]

[BLL]

Hi, Thanks for your thoughts on it. It seems that I would be well advised to continue doing it as I am, sending each value in a comma delimited string. It's a bit long-winded but it does work!
Thanks again for your help.

Brian

[temtronic]

For a data logger project I used a Vinculum/flash drive for storage. Using the 'Comma Separated Variables' was THE way to store the data ! Once stored, pull drive, push into USB port of PC and eXcel KNEW the data and 'arranged' it all for me !
The other benefit was it was easy to add variables to the list, simple printf...... lines of code, all easy to see and read, something these old eyes appreciate !
Heck, if what you have WORKS , don't get 'fancy'. YOU understand how it works so unless there's a critical reason to upgrade, don't bother !

Jay

[BLL]

Yes, I agree with you. I was just trying to make the code smaller, but, as you say, it works, so it will do!
Brian