CPLD - XC95xx/Coolrunner, realne???

[Naprstek, Jiri]

Tohle se Vam urcite libit nebude, ale motoroli 56F801x ma 12bit prevodnik 1.1us, casovani CCD se da delat timerama, s nima syncnout i ten A/D a s ohledem na to, ze je to napul DSP, tak spektralni analyza nebude problem. Vzorek zdarma, cena asi 3,5$ :-)

Jirka N.

> -----Original Message-----
> From: Marek Pavlu [mailto:pavlu@hwg.cz]
> Sent: Thursday, January 12, 2006 4:42 PM
> To: 'HW-news'
> Subject: RE: CPLD - XC95xx/Coolrunner, realne???
> 
> 
> Zdravim, 
> 
> Kepak. Nektere senzory mají dokonce predepsany minimalni 
> hodinovy kmitocet. 
> Jak jsem jiz psal, zim dele ten signal zustava v CCD, tim 
> vice je ovlivnen
> sumem. 
> Navic pokud vychazim napr. z jednoho starsiho CCD od SONY, 
> ILX511, tak tam
> je minimální kmitocet 100kHz. 
> Coz znamena, ze 10MIPS procesor ma na periodu pouze 100 instryukci. 
> Zda se to hodne, ale staci si uvedomit, ze tam jsou minimalne 
> tri ridici
> signaly pro CCD. Dale minimalne dva signaly pro ADC a ještě 
> se to musi nekam
> ulozit.
> 
> Jinak s vlastní zaverkou to nema nic spolecneho. 
> Rychlost vycteni radku a rychlost opakovani mereni spolu 
> takto nesouvisi. 
> Vycteni sice probehne za 1ms napr., ale expozicni doba se 
> muze pohybovat od
> jednotek ms az po vteriny... 
> 
> A i kdyby to zvladla jen trivialni logika, tak tim spis bych tam chtel
> vrazit CPLD, protoze nemam cas se prebabravat s DPS, když 
> vznikne chyba a
> navíc bych mel duvod se kloudne naucit VHLD:).
> 
> 
> S pozdravem, 
>                 Marek Pavlu 
> 
> //  -----Original Message----- 
> //  From: hw-list-bounces@list.hw.cz 
> [mailto:hw-list-bounces@list.hw.cz] On 
> //  Behalf Of Jan Waclawek 
> //  Sent: Thursday, January 12, 2006 10:27 AM 
> //  To: HW-news 
> //  Subject: Re: CPLD - XC95xx/Coolrunner, realne??? 
> //  
> //  Fuj, to som si oddychol :-) 
> //  
> //  Ale aj tak, predpokladajme CCD s 2k elementami, aby bola potreba 
> //  20Mpix/s, to by sa chodilo so 100us zavierkou (1/10000s), 
> to ma byt na 
> //  spektralku coho? Pri takej zavierke sa musi riadne 
> svietit... a este sa 
> //  to ma aj menit... 
> //  
> //  Si myslim, ze smelo mozete zist s vycitavacimi hodinami o 
> jedenapol radu
> 
> //  dole, a tam bude stacit bezne mcu a mozno nejaka trivialna 74xx 
> //  logika... 
> //  
> //  wek 
> //  
> //  
> //  
> //  Daniel Valuch wrote: 
> //  > to asi ked citas z CCD tak tam mas signaly s podobnou 
> frekvenciou. Ide
> 
> //  > to predsa von seriovo... 
> //  > b. 
> //  > 
> //  > 
> //  > Jan Waclawek wrote: 
> //  > 
> //  > 
> //  >>>Osciloskop nebo logicky analyzator do 100MHz bych k ruce mel a 
> //  pozadavek na 
> //  >>>merene signaly jsou nekde kolem 20MHz maximalne. 
> //  >>> 
> //  >>> 
> //  >> 
> //  >>Asi som dementny alebo tomu nerozumiem, to chcete na 
> CCDcko blikat 
> //  20MHz? 
> //  _______________________________________________ 
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