Dear Scott,
In message 48FBADA6.3090505@psyent.com you wrote:
Why the heck does flash_is_busy() return 0 when the flashobviously is still busy?
Does this use the toggle bit detection? I saw the same symptoms
Hm... how can I tell if it does?
The driver reports "AMD Standard command set", so it probably does.
with Nios II. Basically, the memory controller was reading the 16-bit flash twice to obtain a full 32-bit word, then returning just the first 16-bits. So, I would never see the toggle bit changing.
Well, I see that no real 64 bit accesses are used, so I think we will here see two 32 bit accesses to get the full 64 bit data, and probably the same thin happens.
Not sure if this is similar to your situation ... but it was a real pain-in-the-butt to finally understand what was happening in my situation.
And how did you fix it?
Best regards,
Wolfgang Denk