in system flash programming

[hock]

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.

 

[silvio]

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 :
**broken link removed**

You can look at:
**broken link removed** , as well.

Regards,
Silvio

 

[hock]

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