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<div class="moz-cite-prefix">Je fakt, ze chovani neodpovida stavu,
kdy by treba SRAM mela normalne fugovat, displej nefungoval
samozrejme vubec. Asi se zapisuje nejaky buffer 8B? Mozna se
pocita s tim, ze ta pamet jeste nebyla zapisovana a je to fuk? (to
by ale vadilo v pripade treba zalohovane pameti...)</div>
<div class="moz-cite-prefix">Kazdopadne jsem cekal, ze to bude
zmineno v errata, ale nic.<br>
</div>
<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix">Dne 06.05.2020 v 12:20 Tomas Dresler
napsal(a):<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Expert
hlasi, ze podle typu pameti STM32 u FMC pouziva spekulativni
cteni. O zapisu nevim, ale v oblasti typu pamet je to mozne,
u device ne, stejne tak cteni.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Takze
pouzit MPU je nejlepší volba.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Tomas<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"
moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></a></p>
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<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",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><a class="moz-txt-link-abbreviated" href="mailto:konfera@efton.sk">konfera@efton.sk</a><br>
<b>Sent:</b> Wednesday, May 6, 2020 11:26 AM<br>
<b>To:</b> HW-news <a class="moz-txt-link-rfc2396E" href="mailto:hw-list@list.hw.cz"><hw-list@list.hw.cz></a><br>
<b>Subject:</b> Re: STM32F7 zahada FMC - vyreseno<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Toto tu podla
mna nie je vysvetlenie a prestavenie do Device zakryva nejaky
iny mechanizmus (a ani zapnuta cache by to podla mna
nevysvetlila). <br>
<br>
Ak by sa to stalo pri citani (co viem ze sa stava) tak to je v
poriadku, to je z pohladu Normal pamate koser, ale zapis nie,
ved to nepochybne poskodi obsah pamate.<br>
<br>
Mohli by to pritomni experti z ST prosim okomentovat?<br>
<br>
Dakujem<br>
<br>
wek<o:p></o:p></p>
<div>
<p class="MsoNormal">On 6 May 2020 09:51:21 CEST, Jaroslav
Buchta <<a href="mailto:jaroslav.buchta@hascomp.cz"
moz-do-not-send="true">jaroslav.buchta@hascomp.cz</a>>
wrote:<o:p></o:p></p>
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<p class="MsoNormal">Aha, tak jsem zapomel zase na ruzne
typy pristupu do pameti, device memory atd... <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Resi to remap a bude to snad
resitelne i konfigurtaci MMU.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><a
href="https://community.st.com/s/question/0D50X00009XkWQE/stm32h743ii-fmc-8080-lcd-spurious-writes"
moz-do-not-send="true">https://community.st.com/s/question/0D50X00009XkWQE/stm32h743ii-fmc-8080-lcd-spurious-writes</a><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Dne 06.05.2020 v 8:33 Jaroslav Buchta
napsal(a):<o:p></o:p></p>
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<p class="MsoNormal">Mam na FMC pripojeny OLED displej, 8b
dat, konfigurace pres CubeMX. DCACHE MCU zakazana. <br>
<br>
Kdyz provedu radek <br>
<br>
*(volatile uint8_t *)0x60010000 = 0xaa; <br>
<br>
vyvola to 2x NE1 a v kazdem cyklu 4x NWE <br>
<br>
V Assembleru to vypada OK <br>
<br>
237 *(volatile uint8_t *)0x60010000 = 0xaa;
<br>
08000bf8: ldr r3, [pc, #24] ; (0x8000c14
<main+172>) <br>
08000bfa: movs r2, #170 ; 0xaa <br>
08000bfc: strb r2, [r3, #0] <br>
<br>
Konfigurace je jako LCD interface 8 bitu. FIFO zakazana.
Stejne se to chova pri krokovani jako pri normalnim
behu. <br>
<br>
jednotlivy zapis vypada z hlediska NWE dle obrazku v
priloze. <br>
<br>
Napada nekoho, kde muze byt problem? <br>
<br>
<br>
<br>
<br>
<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>HW-list mailing list - sponsored by <a href="http://www.HW.cz" moz-do-not-send="true">www.HW.cz</a><o:p></o:p></pre>
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<p><o:p> </o:p></p>
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