Le dimanche 1 novembre 2009, George M. Gallant, Jr. a écrit : > PIC18F2550 if a nice step up. PIC24F or dsPIC33 is even a nicer. Similar > cost & pinout. 16 bit instructions with linear data space. These parts > are 3.3V with limited tolerance for 5.0V I/O. Some also have user > configuration pinout,
Thanks for the information George. I choosed a 18F2550 to stay as close as I could to the original 16F886 I have - the circuit is already built, so I needed same pinout, same power supply (5V), same internal oscillator and Timer2 characteristics (for I do funny things with it ;-) I was also "not completely sure" that the free software tools out there would handle the most "bright and recent" model well... And I don't know the complete list of PIC series by heart, being a PIC and microcontroller newcomer... So well I took the Comparison chart at microchip.com, entered the specs I needed, it proposed me with 4 or 5 models with the 2550 close to the high- end... I then tried to check my tools compatibility with all the proposed models, retained what was specifically listed with everything I had, checked the datasheet, went to my suppliers web catalogue and choosed "the nicest at the lowest price" (i.e. a 2553 costs about 1.20 Euro more per piece than a 2550 where I have no reason to prefer it for my application)... So well, I ordered a couple 2550s today, I think I'll move to it as soon as my code explodes my 16F886... Still will have a little soldering to do : I use 2 I/O ports on the 16F886 that can't be configured as I/O ports on the 2550 :-( ...being absolutely reserved for USB VDD (which I don't use) and clock input (which I don't use either...) Another option I'm considerig is giving a shot to another (alas commercial) compiler. I've seen one that pretends it generates code about half the size of competitors... Could be an alternative to the soldering iron :-\ Kind regards. -- Michel Bouissou (OpenPGP ID 0xEB04D09C) ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
