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Altera_Forum's avatar
Altera_Forum
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20 years ago

problems with flash and tri-state-bus

Hi everybody, on a custom board, I use a tri-state-bus and cfi flash component to connect an amd compatible flash device with a 16 bit wide bus. The entrypoint to my application is alt_main, ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

Ok, the problems seems to be related to the avalon bus.

As I understand, the additional read cycles are related to the dynamic addressing

and are ok, because the additional data is discarded by the bus.

The additional write cycle indeed is a problem. As far as I could figure out, it occurs only writing to an odd address.

I do not know if this is mentioned in any documentation, at least I could not find it. But it is known for sure, that I know after having a closer look to the HAL cfi flash driver and the development board schematics.

Have fun,

--Wolfgang