protofuse Posted March 20, 2009 Report Share Posted March 20, 2009 hello all of you,firstly, I have to thank you before anything.you produced and produce a very big framework with a very nice community.I read a lot, I'll continue to do that to be more aware.But At this point (just before to buy) I need some help. I just hope you won't find my question as a very newbie question and that it won't disturb you...I read http://www.midibox.org/dokuwiki/doku.php?id=mios_pic18f4685 about PIC18f4685indeed, when I read http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en026324 and http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010297 , I can see the differencies between them about internal EEPROM, internal flash and RAM.I read that MIDIO128 (128 buttons + 128 leds) is very ok with PIC18F452I only produce and receive midi messages, no sound (no chip for that in the box!)My project will involved 98 buttons, 103 pots and 90 RGB leds.I'll use 2 core + 4 AINx4 for pots3 DINx4 for buttons2 DOUTx4 (one for multiplexing 8x8 rgb leds with 2 Darlington Transistor Arrays, the other one for the same kind of matrix, but smaller i.e 8x3 + 2..)1 LTCdo you think I'll need PIC18F452 or PIC18F4685 ?I read that modification in os and app could it be required to use the PIC18F4685 (http://www.midibox.org/dokuwiki/doku.php?id=using_pic18f4685 : "Note: PIC18F4685 and PIC18F4682 are not 100% binary compatible to PIC18F452. RAM from 0×60-0x7f is not directly accessible. BANKED accesses have to be used instead.")I hope I'll find infos about that :)long life to the communityps: my project will be published asap and ALL will be available (code/schematics/design/photos) Quote Link to comment Share on other sites More sharing options...
stryd_one Posted March 20, 2009 Report Share Posted March 20, 2009 Am I allowed to choose "neither"? :) I'd say you want 4620. More RAM than a 452, which will be handy for your app, and still a little bit more than a 4685. 4685 is only really needed if you want CAN buss for some reason. Quote Link to comment Share on other sites More sharing options...
protofuse Posted March 27, 2009 Author Report Share Posted March 27, 2009 hi stryd_one,sorry, I didn't check this thread and see your answer.thanks for your answer.I'll get 2 pic 4620!the project involves a rgb led matrix we're discussing here, if you're interested too:http://www.midibox.org/forum/index.php/topic,12786.30.htmlcheers! Quote Link to comment Share on other sites More sharing options...
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