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<div class="moz-cite-prefix">To takhle asi nepujde. Asi by bylo
cestou definovat lokalni promennou typu _SetBitPole, inicializovat
a pouzit, rozumny prekladac to zoptimalizuje a pouzije jen registr
a bude to OK.<br>
Abych rekl pravdu, ja bych takove slozite konstrukce nepouzival a
bud pouzil ve funkci 2 parametry nebo jeden a nejaka makra na
slozeni hodnot do parametru skrz posuvy a bitove OR. V C++ by to
bylo jine kafe, ale u MCU s klasickym C je to IMHO trosku kanon na
vrabce.<br>
<br>
Dne 12.1.2013 22:11, Miroslav Draxal napsal(a):<br>
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<title>Re: pole bitového pole v C</title>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Vlastně
obklikou to dělám takhle<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
tmp.value = (24 - CisloSekce) | 0x40;<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
VentilSet (tmp);<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Chtěl
bych<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
VentilSet ((24 - CisloSekce) | 0x40);<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
<a class="moz-txt-link-abbreviated" href="mailto:hw-list-bounces@list.hw.cz">hw-list-bounces@list.hw.cz</a>
[<a class="moz-txt-link-freetext" href="mailto:hw-list-bounces@list.hw.cz">mailto:hw-list-bounces@list.hw.cz</a>] <b>On Behalf Of </b>Jaroslav
Buchta<br>
<b>Sent:</b> Saturday, January 12, 2013 9:44 PM<br>
<b>To:</b> HW-news<br>
<b>Subject:</b> Re: pole bitového pole v C<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Ja proste na tyhle prevody jdu pres
ukazatele, takze bych to udelal zase takhle (nezkouseno)<br>
<br>
VentilSet (*((_SetBitPole*)&TMP));<br>
<br>
Proste se vezme adresa promenne TMP operatorem &,
ukazatel na cokoli jde pretypovat na ukazatel na cokoli
jineho, cili i na union a pak se operatorem dereference *
zase ziska objekt na odkazovane adrese (uz pretypovany).
Mozna to jde i jednoduseji, ale ja takhle prevadim i typy z
neznaminkovych na znamenkove, napr. v komunikacnich
paketech, kdyz UINT uvnitr obsahuje hodnotu se znamenkem,
napr.: float fTempSecIn =
(float)*(short*)&ProcImgRO.r.tempSecInp100; <br>
<br>
<br>
Dne 12.1.2013 21:34, Miroslav Draxal napsal(a):<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hmm,
přiznávám, že tomu nehovím, neumím to přečíst. Nic. Ráno
se k tomu vrátím, a budu se to snažit pochopit. Pro dnešek
ještě jednu věc.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Mějme
podprogram</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">void
VentilSet (_SetBitPole CisloVentilu)</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">kde
</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">typedef
union {</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
char value;</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
struct {</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
unsigned CisloBitu : 6;</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
unsigned SetClr : 1;</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
} bits;</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">}
_SetBitPole;</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Pokud
budu mí char TMP</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Jak
to dostanu do volání toho podprogramu.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">VentilSet(TMP)
</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Stále
se jedná o 1byt.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Je
mi jasné že na začátku vytvořit TMP jako _ SetBitPole</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Přetypování
char na union nejde. Jak na to? Míra</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
<a moz-do-not-send="true"
href="mailto:hw-list-bounces@list.hw.cz">hw-list-bounces@list.hw.cz</a>
[<a moz-do-not-send="true"
href="mailto:hw-list-bounces@list.hw.cz">mailto:hw-list-bounces@list.hw.cz</a>]
<b>On Behalf Of </b>Jaroslav Buchta<br>
<b>Sent:</b> Saturday, January 12, 2013 8:27 PM<br>
<b>To:</b> HW-news<br>
<b>Subject:</b> Re: pole bitového pole v C</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Takhle mi to AVR C sezere: (jeste jsem
musel doplnit zavorky)<br>
<br>
char byt;<br>
<br>
typedef union bytX<br>
<br>
{<br>
<br>
char value;<br>
<br>
unsigned bit0 : 1;<br>
<br>
}_byt;<br>
<br>
int main (void)<br>
{<br>
<br>
(*((_byt*)&byt)).bit0 = 1;<br>
<br>
<br>
<br>
<o:p></o:p></p>
</div>
<p class="MsoNormal"><br>
<br>
__________ Informace od ESET NOD32 Antivirus, verze databaze
7887 (20130112) __________<br>
<br>
Tuto zpravu proveril ESET NOD32 Antivirus.<br>
<br>
<a moz-do-not-send="true" href="http://www.eset.cz">http://www.eset.cz</a><br>
<br>
<br>
<br>
<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
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</blockquote>
<p class="MsoNormal"><br>
<br>
<br>
__________ Informace od ESET NOD32 Antivirus, verze databaze
7887 (20130112) __________<br>
<br>
Tuto zpravu proveril ESET NOD32 Antivirus.<br>
<br>
<a moz-do-not-send="true" href="http://www.eset.cz">http://www.eset.cz</a><o:p></o:p></p>
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<br>
<br>
__________ Informace od ESET NOD32 Antivirus, verze databaze 7887
(20130112) __________<br>
<br>
Tuto zpravu proveril ESET NOD32 Antivirus.<br>
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