Re: [Lcd4linux-devel] Re: lcd4linux Noritake GUI128X32-311 - I got it working !

[Michael R. <re...@eu...>]

Hi Julien,

>>I think it would be a good idea to support both methods: busy-line
>>checking and a fixed delay. We've encountered situations in the past,
>>where waiting caused lcd4linux to eat up too much CPU cycles (especially
>>on slower systems). 

> Funny ! It's precisely because of that reason I reverted to the fixed
> delay method : The busy-line checking was eating too much CPU....
> But it might come from my crappy MediaGX-based test box.
Strange, but may come from the ndelay(200) in the busy-checking loop.

You should anyway implement some fallback mechanisms (like, do not wait
forever, fall back to normal delay if a certain amount of busy-checks
failed, and so on). Take a look at the HD44780 driver, you'll find a
very sophisticated busy-checking there.


bye, Michael

-- 
Michael Reinelt <re...@eu...>
http://home.pages.at/reinelt
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