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hock
Joined: 28 May 2001
Posts: 1291
Helped: 23
Location: India
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 19 Jan 2004 6:45 in system flash programming |
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i am developing a boot loader for 8051 based micro controller.
The project is almost over but for writing the flash portion.
i am getting errors when i write a 64 byte page in to AT29c256-70 PC
i can write the first page and i can verify it as well, but when i try to write the second page i get error.
can some one help me with this job.
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19 Jan 2004 6:45 Ads |
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silvio
Joined: 31 Dec 2001
Posts: 801
Helped: 90
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19 Jan 2004 14:55 Re: in system flash programming |
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Hi Hock,
First of all, I hope that AT29C256 is manufactured by Atmel.
I'm confident that you ANDed the /PSEN and /RD in order to drive the /CE of AT29C256.
How did you detect the end of a program cycle: by polling of I/O7 or examining the toggle bit I/O6 ?
Did you enabled the SDP features ?
The best way to solve the problem and help you is uploading the program.
BTW, hope you overcome the problem :
http://www.elektroda.pl/eboard/ftopic46353
You can look at:
http://www.elektroda.pl/eboard/ftopic55981 , as well.
Regards,
Silvio
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hock
Joined: 28 May 2001
Posts: 1291
Helped: 23
Location: India
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21 Jan 2004 5:56 Re: in system flash programming |
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i will sure upload the source code and pc side interface as soon as i am finished. i hope it will be a big help to many embeded developers.
thanks for the flash program link
hock
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