AT91SAM7 jak hodit hodnoty na pin

[Bear John Grills]

Tak takhle je to .. Ja sem si porad rikal k cemu jsou ty maskovaci 
registry, .. super, diky moc, v datasheetu me to asi neprastilo do oci 
takze jsem tomu nevenoval pozornost..
 
Bear

Jiri Bezstarosti napsal(a):
> Synchronous Data Output
> Controlling all parallel busses using several PIOs requires two 
> successive write operations in the
> PIO_SODR and PIO_CODR registers. This may lead to unexpected transient 
> values. The PIO
> controller offers a direct control of PIO outputs by single write access 
> to PIO_ODSR (Output
> Data Status Register). Only bits unmasked by PIO_OWSR (Output Write 
> Status Register) are
> written. The mask bits in the PIO_OWSR are set by writing to PIO_OWER 
> (Output Write Enable
> Register) and cleared by writing to PIO_OWDR (Output Write Disable 
> Register).
> After reset, the synchronous data output is disabled on all the I/O 
> lines as PIO_OWSR resets at
> 0x0.
>
> Tolik se pise v PDF ...
>
> Uz to tady prakticky nectu, takze reaguji opravdu nahodou a pokud jak se 
> to ma zaznelo, omlouvam se, ale radeji to jeste zopaknu v lidstine a 
> cestine. Pokud nastavujete bity vystupu a potrebujete zmenit soucasne na 
> 1 a 0 a jeste jen nektere bity, pak muzete zapsat do PIO_ODSR v pripade, 
> ze je konkretni bit nastaven v PIO_OWSR, coz se provede pres PIO_OWER a 
> pripadne smazne PIO_OWDR. Zkratka si hodite masku pres registr PIO_ODSR 
> a nastavujete si jen ty piny, ktere chcete a to do jednicek a nul 
> zaroven, co je vymaskovano se nezmeni, nema to povolen primy zapis. 
> Vypada to zamotane, ale kdyz s tim chvili delate, na ty tuny registru si 
> zvyknete a pak uz Vam to ani neprijde ;).
>
> V kazdem pripade si vzdycky projdete PDF (dokumentaci), vyplati se to, 
> protoze tady obcas muzete dostat i pekne hrabeci rady :))).
>
> --
> Jiri Bezstarosti
>
> Bear John Grills napsal(a):
>   
>> S tim nastavenim CODR pred nastavenim SODR jsem spokojen.. diky pomohlo 
>> mi to
>>   
>>     
>
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