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<div class="moz-cite-prefix">O co hur by vyslo zapsat to takto: ?<br>
<br>
unsigned char i=0;<br>
while (obj_size--)<br>
{<br>
((unsigned char *)pObj)[i++] = _eeprom_read(ee_addr++);<br>
}<br>
<br>
Asi bude zalezet na moznostech neprime adresace daneho MCU, u
ARMu tahle indexace prirozene vyuzije dane moznosti.<br>
<br>
Dne 08.04.2017 v 0:13 Pavel Hudecek napsal(a):<br>
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#000000">
<div>Za rozumnější bych považoval přetypovat ten pObj:</div>
<div><font style="FONT-SIZE: 11pt" color="#1f497d">*(unsigned
char *)pObj = _eeprom_read(ee_addr++);</font></div>
<div> </div>
<div><font color="#1f497d">PH</font></div>
<div style="FONT-SIZE: small; TEXT-DECORATION: none;
FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal;
COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline">
<div style="FONT: 10pt tahoma">
<div> </div>
<div style="BACKGROUND: #f5f5f5">
<div style="font-color: black"><b>From:</b> <a
moz-do-not-send="true" title="evik@volny.cz"
href="mailto:evik@volny.cz">Miroslav Draxal</a> </div>
<div><b>Sent:</b> Friday, April 07, 2017 11:59 PM</div>
<div><b>To:</b> <a moz-do-not-send="true"
title="hw-list@list.hw.cz"
href="mailto:hw-list@list.hw.cz">'HW-news'</a> </div>
<div><b>Subject:</b> RE: ukazatel typu void to char</div>
</div>
</div>
<div> </div>
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<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d">Cele je to takhle<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d"><o:p></o:p></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d">unsigned char _eeprom_read(unsigned int
AdresaEEPROM);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d"><o:p></o:p></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d">void _eeprom_read_object(unsigned int
ee_addr, void *pObj, unsigned char obj_size) {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d"> //unsigned char *p = obj_p;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d"><o:p></o:p></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d"> while (obj_size--) {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d"> *pObj = (void)
_eeprom_read(ee_addr++);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d"> pObj++;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d">}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;
FONT-FAMILY:
"Calibri","sans-serif"; COLOR:
#1f497d"><o:p></o:p></span> </p>
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<p class="MsoNormal"><b><span style="FONT-SIZE: 10pt;
FONT-FAMILY:
"Tahoma","sans-serif"">From:</span></b><span
style="FONT-SIZE: 10pt; FONT-FAMILY:
"Tahoma","sans-serif"">
Hw-list [<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>Pavel Hudecek<br>
<b>Sent:</b> Friday, April 07, 2017 9:48 PM<br>
<b>To:</b> HW-news<br>
<b>Subject:</b> Re: ukazatel typu void to char<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p></o:p> </p>
<div>
<div>
<div>
<p class="MsoNormal"><span style="FONT-FAMILY:
"Calibri","sans-serif";
COLOR: black">Hlavně mi teda není jasné, k čemu
je potřeba přetypovávat výsledek funkce na void.<o:p></o:p></span></p>
</div>
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<div>
<div>
<p class="MsoNormal"><span style="FONT-SIZE:
10pt; FONT-FAMILY:
"Tahoma","sans-serif";
COLOR: black"> <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="FONT-FAMILY:
"Calibri","sans-serif";
COLOR: black">PH</span><span
style="FONT-SIZE: 10pt; FONT-FAMILY:
"Tahoma","sans-serif";
COLOR: black"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="FONT-SIZE:
10pt; FONT-FAMILY:
"Tahoma","sans-serif";
COLOR: black"> <o:p></o:p></span></p>
</div>
<div>
<div>
<p class="MsoNormal" style="BACKGROUND:
whitesmoke"><b><span style="FONT-SIZE: 10pt;
FONT-FAMILY:
"Tahoma","sans-serif";
COLOR: black">From:</span></b><span
style="FONT-SIZE: 10pt; FONT-FAMILY:
"Tahoma","sans-serif";
COLOR: black"> <a moz-do-not-send="true"
title="t.mainzer@gmail.com"
href="mailto:t.mainzer@gmail.com">tomas
mainzer</a> <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="BACKGROUND:
whitesmoke"><span style="FONT-SIZE: 10pt;
FONT-FAMILY:
"Tahoma","sans-serif";
COLOR: black"> <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="BACKGROUND:
whitesmoke"><span style="FONT-FAMILY:
"Calibri","sans-serif";
COLOR: black">>> *pObj++ = (void)
_eeprom_read(ee_addr++);<o:p></o:p></span></p>
</div>
</div>
</div>
<div>
<div>
<div>
<p class="MsoNormal"><span style="FONT-FAMILY:
"Calibri","sans-serif"; COLOR: black">nevim co na to
norma (mozna to nejak definuje, rad se
poucim), ale prijde mi ze kazdy uhoz v tom
radku smrdi prusvihem ;-)<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="FONT-FAMILY:
"Calibri","sans-serif";
COLOR: black">doplneni: tak gcc ma v tom
ohledu odchylku od normy C a definuje
sizeof(void)==1 se vsemy dusledky pro
pointerovou aritmetiku.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="FONT-FAMILY:
"Calibri","sans-serif";
COLOR: black">Ale pretypovani na (void) mi
stale prijde divne. co takto:<br>
*((unsigned char*)(pObj++)) =
_eeprom_read(ee_addr++); <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="FONT-FAMILY:
"Calibri","sans-serif";
COLOR: black"> <o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class="MsoNormal"><span style="FONT-FAMILY:
"Calibri","sans-serif";
COLOR: black"> <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="FONT-FAMILY:
"Calibri","sans-serif";
COLOR: black">Dne 7. dubna 2017 19:00
Miroslav Draxal <<a
moz-do-not-send="true"
href="mailto:evik@volny.cz"
target="_blank">evik@volny.cz</a>>
napsal(a):<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-FAMILY:
"Calibri","sans-serif";
COLOR: black">Pro čtení jsem to udělal
takhle, sice to hlásí varování o
nepředvídatelném<br>
chování, ale koukl jsem na disa. a tam není
žádný problém.<br>
Takže jsem pro tenhle řádek vypnul hlášení
varování.<br>
*pObj++ = (void) _eeprom_read(ee_addr++);<br>
<br>
Jakou paseku by tenhle kód mohl dělat?
Nenapadá mě nic.<br>
<br>
-----Original Message-----<br>
From: Hw-list [mailto:<a
moz-do-not-send="true"
href="mailto:hw-list-bounces@list.hw.cz">hw-list-bounces@list.hw.cz</a>]
On Behalf Of Jan Waclawek<br>
Sent: Friday, April 07, 2017 3:48 PM<br>
To: HW-news<br>
Subject: RE: ukazatel typu void to char<br>
<br>
Hm tak ak mate zapnute aj vsetky
optimalizacie, tak to je zvlastne, lebo<br>
toto je bezne pouzivana paradigma.<br>
<br>
V skutocnosti je to asi jedina uzitocna
aplikacia pre void*.<br>
<br>
V kazdom pripade vsak este stale
nedoporucujem robit nic ine ako pouzit tu<br>
"pomocnu" premennu.<br>
<br>
wek<br>
<br>
<br>
>Ano, poslední XC8 v1.41 pro.<br>
><br>
>-----Original Message-----<br>
><br>
>A mate tu plnu verziu prekladaca?<br>
><br>
>wek<br>
><br>
><br>
>----- Original Message ---------------<br>
>>Jo, jenľe kdyľ se podívám do disas.
(coľ je moje váąeň, jak to dělají)<br>
>>tak tam mám 3x nesmyslné předávání
hodnot z ram do ram, neľ tu adresu<br>
>pouľije.<o:p></o:p></span></p>
<div>
<div>
<p class="MsoNormal"><span
style="FONT-FAMILY:
"Calibri","sans-serif";
COLOR: black">>>Rád bych se tomu
vyhnul.<br>
>><br>
>>-----Original Message-----<br>
>><br>
>>No len si ho pekne urobte,
predidete tym zbytocnym problemom.<br>
>><br>
>>wek<br>
>><br>
>><br>
>>----- Original Message
---------------<br>
>>>Nechce se mi "zřizovat"
pomocný ukazatel *p.<o:p></o:p></span></p>
</div>
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