reading the flash memory
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reading the flash memory
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poopslayer78


Newbie


Joined: 10 Sep 2009
Posts: 28
Posted: 03 Apr 2010 10:46:47 pm    Post subject:
I am writting a program that needs to read large data files(saved as asm programs) that are stored in the flash memory. I do not need to write to the flash chip, just read bytes one at a time. I have a Ti84+ SE by the way.

Any help would be gladly accepted.
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calcdude84se


Member


Joined: 09 Aug 2009
Posts: 207
Posted: 04 Apr 2010 09:55:04 am    Post subject:
Do you want to read the data directly, or is an OS routine that copies the data to RAM fine?
Before you do either, you'll have to use BCALL(_ChkFindSym) to find the location of the program.
After that, you either copy the data directly (or read it, byte by byte) or use BCALL(_FlashToRAM) to copy it with an OS routine.
I can draw up some code if you want it.
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poopslayer78


Newbie


Joined: 10 Sep 2009
Posts: 28
Posted: 04 Apr 2010 01:18:51 pm    Post subject:
reading the data directly without a B_call is what i really need but id still like to know the arguments for the FlashToRam call for reference

Last edited by Guest on 04 Apr 2010 01:24:24 pm; edited 1 time in total
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calc84maniac


Elite


Joined: 22 Jan 2007
Posts: 770
Posted: 04 Apr 2010 02:21:18 pm    Post subject:
poopslayer78 wrote:
reading the data directly without a B_call is what i really need but id still like to know the arguments for the FlashToRam call for reference

You can use port 6 to control which Flash page is mapped to $4000-$7fff in memory. If you are reading data and you reach $8000, you must continue reading at $4000 on the next page.
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DrDnar


Member


Joined: 28 Aug 2009
Posts: 116
Posted: 04 Apr 2010 05:53:03 pm    Post subject:
WikiTI has information on this topic. I've also written two programs that read data from the archive, an undeleter, which will show you how to parse the archive directly; and a program that dynamically reads a data file from the archive.
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poopslayer78


Newbie


Joined: 10 Sep 2009
Posts: 28
Posted: 04 Apr 2010 07:07:48 pm    Post subject:
perfect! ill try to get some code working.
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reading the flash memory
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