LINUX na AVR (Re: SDRAM - lze nezapojit A12 (spojit s A11) ?)

Pondělí Březen 25 13:03:48 CET 2013

Presne tak, rozumiete tomu spravne. Preto sa tento konkretny kod strka
do RAMky a spusta odtial, aby bola zarucena synchronnost bez "rusenia"
z prefetch cache.
Pokial ma pamat neklame tak v tom UNIX-ovom systeme su tie rychlosti
cca 1MB/s, ale momentalne je to kvoli jednoduchosti a minimalnej
velkosti bufferov urobene mierne suboptimalne.

2013/3/25 Jaroslav Buchta <jaroslav.buchta na hascomp.cz>:
> Diky hezka prace a divny assembler ;-)
> Chapu dobre, ze CLK je generovan timerem a s tim musi byt synchronni
> provadeni ostatnich instrukci a nic to nesmi rusit?
> Jakych realnych prenosovych rychlosti se asi tak da dosahnout?
>
> Dne 25. 3. 2013 11:55, Jaromir Sukuba napsal(a):
>
>> Tu https://code.google.com/p/retrobsd/source/checkout mate napisane ze
>> treba urobit
>> svn checkout http://retrobsd.googlecode.com/svn/current/
>> retrobsd-read-only
>> Tu http://retrobsd.org/wiki/doku.php/doc/index mate viac informacii,
>> ale hlavne vas bude zaujimat asi toto
>> http://retrobsd.org/wiki/doku.php/doc/toolchain-mips ak si to chcete
>> cvicne buildnut. Mimochodom, zdrojak pre SDRAM je pisany v PIC32 (MIPS
>> M4K) assembleri, zelam Vam prijemnu zabavu pri jeho citani :-)
>>
>>
>>
>> 2013/3/25 Jaroslav Buchta <jaroslav.buchta na hascomp.cz>:
>>>
>>> Asi jsem trosku zabrzdenej dneska, ale stahnul jsem
>>> http://retrobsd.googlecode.com/svn/stable/ retrobsd-stable  (doufam
>>> komplet,
>>> musel jsem v Linuxu, pod win se nejak nedarilo) a nic co by se podobalo
>>> zdrojaku pro SDRAM tam nemuzu najit...
>>> Muzete me pls popostrcit?
>>>
>>> Dne 24. 3. 2013 12:59, Jaromir Sukuba napsal(a):
>>>
>>>> Ta vec s SDRAM je moj prispevok do projektu RetroBSD -
>>>> http://retrobsd.org/wiki/doku.php/wiki/software
>>>> Ostatne veci tu http://jaromir.xf.cz/bsd/bsd_comp.html
>>>>
>>>> Inak s tymi SDRAM je to pakaren, lepsie je pouzit MCU s SDRAM
>>>> driverom, resp. externy driver.
>>>>
>>>> 2013/3/24 Jaroslav Buchta <jaroslav.buchta na hascomp.cz>:
>>>>>
>>>>> Pekne, s tou SDRAM jste se programoval od pocatku nebo se daji nejake
>>>>> zdrojaky najit na webu?
>>>>> Na prvni pohled mi to prijde dost badani to naprogramovat a vychytat...
>>>>> Docela bych to zkusil, pametovych modulu mam plnej suplik a i jinak se
>>>>> muze
>>>>> takova vetsi RAM v nekterych aplikacich hodit.
>>>>>
>>>>> Dne 24. 3. 2013 11:15, Jaromir Sukuba napsal(a):
>>>>>
>>>>>> S takouto vecou by som nevydrzal dlho cakat. Mal som to nadrotovane za
>>>>>> jeden vecer a mohol som zacat programovat.
>>>>>> Mimochodom, ten UNIX stroj s SDRAM tiez najprv bezal na univerzalke...
>>>>>>
>>>>>> 2013/3/24 Jaroslav Buchta <jaroslav.buchta na hascomp.cz>:
>>>>>>>
>>>>>>> Me zas nebavi to dratovani, ta deska byla puvodne navrzena na vyrobu
>>>>>>> v
>>>>>>> Cine
>>>>>>> za par korun 5x5cm ale nakonec se to dalo do panelu k jinym deskam na
>>>>>>> POOL
>>>>>>> do pragoboardu ;-)
>>>>>>>
>>>>>>> Dne 24. 3. 2013 11:04, Jaromir Sukuba napsal(a):
>>>>>>>
>>>>>>>> Ani mne sa to nepaci, ale snad nebudem na kazdu hovadinu vyrabat
>>>>>>>> normalny plosak :-)
>>>>>>>>
>>>>>>>> Bitbangovanu SDRAM mam pouzitu na UNIX-ovom minipocitaci
>>>>>>>>
>>>>>>>>
>>>>>>>> https://picasaweb.google.com/111890741167251011072/RetroBSDMinicomputer
>>>>>>>>
>>>>>>>>
>>>>>>>> 2013/3/24 Jaroslav Buchta <jaroslav.buchta na hascomp.cz>:
>>>>>>>>>
>>>>>>>>> Hezke, ale nelibi se mi pouziti tech modulu - otazkou je, jak
>>>>>>>>> slozite
>>>>>>>>> je
>>>>>>>>> SW
>>>>>>>>> zvladnout ovladani SDRAM, na minimalni frekvenci CLK tusim nejak
>>>>>>>>> extra
>>>>>>>>> citlive nejsou, s takovym STM32F407xxx na 168MHz by to mohlo docela
>>>>>>>>> svistet
>>>>>>>>> ;-)
>>>>>>>>> Me to zatim zase bootuje, protoze jsem to premistil do garaze k
>>>>>>>>> notasu
>>>>>>>>> co
>>>>>>>>> monitoruje TC aby se tak nenudil ;-)
>>>>>>>>>
>>>>>>>>> Dne 24. 3. 2013 10:07, Jaromir Sukuba napsal(a):
>>>>>>>>>
>>>>>>>>>> Ja som to urobil takto http://jaromir.xf.cz/arm_emu/arm_emu.html
>>>>>>>>>> na
>>>>>>>>>> PIC32, mam rychlost emulacie asi 110000 instrukcii za sekundu.
>>>>>>>>>> Bootuje to asi za 13 minut :-)
>>>>>>>>>>
>>>>>>>>>> 2013/3/24 Jaroslav Buchta <jaroslav.buchta na hascomp.cz>:
>>>>>>>>>>>
>>>>>>>>>>> Tyjo, ono to funguje
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> http://dmitry.gr/index.php?r=05.Projects&proj=07.%20Linux%20on%208bit
>>>>>>>>>>> ;-)
>>>>>>>>>>> No to je neco, takovy prace to autorovi muselo dat a pritom
>>>>>>>>>>> takova
>>>>>>>>>>> blbost
>>>>>>>>>>> ;-) Na te ATXMEGA taky zadna rychlostni hitparada, emuluje asi
>>>>>>>>>>> 12-13000
>>>>>>>>>>> cyklu /s (puvodni projekt zminuje 10000)
>>>>>>>>>>> Prinos HW radice SDRAM neni asi nijak vyrazny, navic jsem do
>>>>>>>>>>> SDRAM
>>>>>>>>>>> musel
>>>>>>>>>>> dat
>>>>>>>>>>> i stav emulovaneho CPU (SoC), protoze ma pres 12kB a nejak mi
>>>>>>>>>>> nedoslo,
>>>>>>>>>>> ze
>>>>>>>>>>> je
>>>>>>>>>>> ta XMEGA na tom tak spatne se SRAM.
>>>>>>>>>>> No uvidime jestli se za nejakou tu hodinku dokonci bootovani :-P
>>>>>>>>>>>
>>>>>>>>>>> Kazdopadne tam ma autor pouzitou nejakou slabsi implementaci SD,
>>>>>>>>>>> na
>>>>>>>>>>> moji
>>>>>>>>>>> mikroSD se to absolutne nechytalo, snazil jsem se to priohnout
>>>>>>>>>>> par
>>>>>>>>>>> hodin
>>>>>>>>>>> ale
>>>>>>>>>>> inicializace karty je tam nejaka divna - tak jsem to napasoval na
>>>>>>>>>>> ten
>>>>>>>>>>> prvni
>>>>>>>>>>> odkaz od p Astera a tam je implementace super, funguje jak SD tak
>>>>>>>>>>> SDHC
>>>>>>>>>>> a
>>>>>>>>>>> podpora FAT je tam take hezky udelana - dokonce ma i hezky shell
>>>>>>>>>>> kterym
>>>>>>>>>>> se
>>>>>>>>>>> da karta testovat... Takze jsem ten druhy odkaz ani nezkoumal,
>>>>>>>>>>> jen
>>>>>>>>>>> stahnul.
>>>>>>>>>>> To byl hezky bastlirsky vikend ;-)
>>>>>>>>>>>
>>>>>>>>>>> mimochodem, nejake zdrojaky, kde by bylo s kartou pracovano ne v
>>>>>>>>>>> SPI
>>>>>>>>>>> ale
>>>>>>>>>>> v
>>>>>>>>>>> SDIO modu bez HW podpory, nemate?
>>>>>>>>>>>
>>>>>>>>>>> Maly obrazek HW v priloze...
>>>>>>>>>>>
>>>>>>>>>>> Dne 23. 3. 2013 7:48, Jaroslav Buchta napsal(a):
>>>>>>>>>>>
>>>>>>>>>>> Diky za odkazy, to vypada super.
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Dne 23. 3. 2013 0:55, Zdeněk Aster napsal(a):
>>>>>>>>>>>
>>>>>>>>>>> Jinak k SD karte funguje na AVR tento software
>>>>>>>>>>> http://www.roland-riegel.de/sd-reader/
>>>>>>>>>>> A super FAT obsluha je zde
>>>>>>>>>>> http://elm-chan.org/fsw/ff/00index_e.html
>>>>>>>>>>> jen
>>>>>>>>>>> je
>>>>>>>>>>> nutne k ni
>>>>>>>>>>> dodelat funkce pro cteni treba z SD.
>>>>>>>>>>> Jsem se upsal u toho ovladani melo byt oboje treba A10, ale asi
>>>>>>>>>>> to
>>>>>>>>>>> bylo
>>>>>>>>>>> jasne :-D
>>>>>>>>>>>
>>>>>>>>>>> Zdenek Aster
>>>>>>>>>>>
>>>>>>>>>>> ---------- Původní zpráva ----------
>>>>>>>>>>> Od: Jaroslav Buchta <jaroslav.buchta na hascomp.cz>
>>>>>>>>>>> Datum: 22. 3. 2013
>>>>>>>>>>> Předmět: Re: SDRAM - lze nezapojit A12 (spojit s A11) ?
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> No jo, asi tak kdyz uz jsem ozelel dalsich 16MB uzemnenim A12 ;-)
>>>>>>>>>>> Je to takovy hobby projekt, ted rozchodim SD kartu a pak zkusim
>>>>>>>>>>> portovat
>>>>>>>>>>> ten
>>>>>>>>>>> ARM amulator. Je to jen hracka ale mozna by to pro demonstracni
>>>>>>>>>>> ucely
>>>>>>>>>>> mohlo
>>>>>>>>>>> mit smysl... A autor si s tim musel dat sakra praci tak uz jen
>>>>>>>>>>> proto
>>>>>>>>>>> ;-)
>>>>>>>>>>>
>>>>>>>>>>> Dne 22. 3. 2013 21:21, Zdeněk Aster napsal(a):
>>>>>>>>>>>
>>>>>>>>>>> No tak pokud by jste měl praxi s osmibitu treba ATARI, tak staci
>>>>>>>>>>> na
>>>>>>>>>>> nejaky
>>>>>>>>>>> port, si udelat ovladani nejakeho horniho dratu treba nejake A15,
>>>>>>>>>>> a
>>>>>>>>>>> tu
>>>>>>>>>>> tvrde
>>>>>>>>>>> drzet v nule a v procesoru, pak adresujete A10 v jednicce  a
>>>>>>>>>>> fyzicky
>>>>>>>>>>> jste
>>>>>>>>>>> dole
>>>>>>>>>>> v pameti, No a kdyz to deaktivujete tak mate normalni prostor,
>>>>>>>>>>> jen
>>>>>>>>>>> u
>>>>>>>>>>> osmibitu pri 64KBytech to melo smysl, kdyz vam 16kB vzala ROMka,
>>>>>>>>>>> tady to je zbytecna komplikace....
>>>>>>>>>>>
>>>>>>>>>>> Zdenek Aster
>>>>>>>>>>>
>>>>>>>>>>> ---------- Původní zpráva ----------
>>>>>>>>>>> Od: Jaroslav Buchta <jaroslav.buchta na hascomp.cz>
>>>>>>>>>>> Datum: 22. 3. 2013
>>>>>>>>>>> Předmět: Re: SDRAM - lze nezapojit A12 (spojit s A11) ?
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Tak po dennim hrani si FUNGUJE, operace zapsani nebo vycteni
>>>>>>>>>>> (kontroly)
>>>>>>>>>>> cele pameti 16MB trva cca 15sec, to ujde a jeste asi pujdou
>>>>>>>>>>> zkratit
>>>>>>>>>>> nektere casy. Docela hezky broucek ATXMEGA64A1, ze to podporuje
>>>>>>>>>>> ;-)
>>>>>>>>>>> Jen takova otazka - na prvnich 12kB co je schovanych pod interni
>>>>>>>>>>> oblasti
>>>>>>>>>>> (IO, EEPROM, SRAM) se asi nijak nedostanu, co?
>>>>>>>>>>> A vecer mam na hrani SD kartu ;-)
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Dne 20. 11. 2012 8:02, Jaroslav Buchta napsal(a):
>>>>>>>>>>>>
>>>>>>>>>>>> No ja bych to chtel nacpat na tohle
>>>>>>>>>>>> http://www.atmel.com/tools/XMEGA-A1XPLAINED.aspx a zprovoznit
>>>>>>>>>>>> tohle
>>>>>>>>>>>>
>>>>>>>>>>>> http://dmitry.co/index.php?p=./04.Thoughts/07.%20Linux%20on%208bit
>>>>>>>>>>>> Problem je, ze 8MB co na desce je asi nestaci. Takze radsi
>>>>>>>>>>>> propojit,
>>>>>>>>>>>> ale IMHO je to jedno. Adresace refresh je stejne autonomni, mode
>>>>>>>>>>>> registr nepouziva tyhle vyssi adresy (jsou nulove) a jinak se
>>>>>>>>>>>> take
>>>>>>>>>>>> snad nepouzivaji. Cili bych mohl adesovat jen pulku radku, jinak
>>>>>>>>>>>> by
>>>>>>>>>>>> se
>>>>>>>>>>>> IMHO nemelo nic stat. Vyzkousime, uvidime ;-)
>>>>>>>>>>>>
>>>>>>>>>>>> Dne 20.11.2012 7:52, j s napsal(a):
>>>>>>>>>>>>>
>>>>>>>>>>>>> Bol by problem supnut to niekam na zem alebo Vdd? Na doske s
>>>>>>>>>>>>> SDRAM
>>>>>>>>>>>>> urcite mate poriadny groundplane, zem musi byt vsade :)
>>>>>>>>>>>>> Inak by spojenie s A11 nemalo robit problem.
>>>>>>>>>>>>>
>>>>>>>>>>>>> 2012/11/20 Jaroslav Buchta <jaroslav.buchta na hascomp.cz>:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Jde mi o pripojeni 32MB pameti ( K4S560432B ) k ATXMEGA A1,
>>>>>>>>>>>>>> ktery
>>>>>>>>>>>>>> ma jen 12
>>>>>>>>>>>>>> adresovych vodicu, pamet 13 pro RAS, CAS se vejde. Nejlepe by
>>>>>>>>>>>>>> to
>>>>>>>>>>>>>> slo
>>>>>>>>>>>>>> asi
>>>>>>>>>>>>>> spojit s pinem A11 ktery je vedle. IMHO se nestane nic jineho,
>>>>>>>>>>>>>> nez,
>>>>>>>>>>>>>> ze budu
>>>>>>>>>>>>>> mit jen 16MB k dispozici, ale treba nekoho napadne nejaky
>>>>>>>>>>>>>> zadrhel.
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