Reading/Writing string to external EEPROM

[paul_dean]

I am reading a 24 character number from the serial port. I would like to store this number to an external EEPROM. I do know how to read and write 256 byte numbers to eeprom, however I do not know how to store this 24 character array. I am using 24lc512 external eeprom. Any help? ideas? thanks in advance.

[PCM programmer]

See this thread for an example:
http://www.ccsinfo.com/forum/viewtopic.php?t=35685
This example is for a string. A string is an array of ASCII characters
with a final terminator byte of 0x00. Make sure that your data is
actually a string, and not just a series of random numbers.

[paul_dean]

Thanks for that link. However the number I am reading in is just an array of numbers, how do I create a string?

[paul_dean]

In that case hello world is a string created by the programmer, but in my case I am reading in a random array of numbers. Thanks in advance.

[Ttelmah]

Seriously, a string _is_ just numbers. They happen to be ASCII values, but everything else is the same. You can initialise an array (or an area in ROM), with:

{0x30,0x31,0x32,0x33,0}

or with:

{"0123"}

and in both cases, the numbers stored are exactly the same.

Once you realise that strings are numbers, the relationship of 'string code' to 'number code', becomes easier to understand.

Best Wishes

[bkamen]

I like to build structs with all my pertinent config info built inside them.

Then no matter what the struct has in it, it can still be written/read byte by byte.

[paul_dean]

Ok thanks alot guys.