petervh / usbasp Goto Github PK

Hi!

I know this question is as old as the universe, but I read all I can find and now
running low on options.

Problem:

• flash size of my code is 64 kb.

• I flashed with the software on the usbasp, a chinese programmer, I changed nothing

• it works for 1 year, until now, suddenly the mega is not running after upload, at least sometimes

• I don't know why, but rigth now the mega is running ok

• I read the flash of the mega with the same usbasp programmer, all bytes are 0xFF

• I found your code and updated the usbasp firmware to version v1.05-2015-12-29

• I read this will solve the problem with the restrictions with the large flash size of the mega

• I read the flash again, now with I think valuable content, but here is the thing

  I get exact 32768 Byte from address 0x00000 - 0x07FFF, then the next 32768 Byte are 0xFF
  I get exact 32768 Byte from address 0x10000 - 0x17FFF, then the next 32768 Byte are 0xFF
  I get exact 32768 Byte from address 0x20000 - 0x27FFF, then the next 32768 Byte are 0xFF
  I get exact 32768 Byte from address 0x30000 - 0x37FFF, then the next 32768 Byte are 0xFF

all 32768 Byte of each block are identical !

So this falsh should never work, because only 32768 byte of my code is written into flash, 4 times
starting at 0x00000,0x10000,0x20000,0x30000

But the code is running without errors, therefore the usbasp has to be the problem.
This Version 1.05 is still not working with the mega2560.

I tried highfuse 0xD8 and 0xD9, no difference.
Right now it is running with Low Fuse 0xFF, High Fuse 0xD8, Extended Fuse 0xF8 ok.

In the readme file is a hint to version v1.06, but I cannot find this HEX file.
I downloaded all content here, but there is no version 1.06 to find.

Again, I know this is old stuff, but for me realy important, because I don't want to upload
my code again with the version 1.05, because it is not reading the flash correctly.
So I assume it will not upload the code corectly.

I realy would appreciate an answer, but I realy would not be upset if I don't get one :-)

Ich bin aus Deutschland, also auch in Deutsch ist jede Hilfe willkommen :-)

Gruß Klaus