Dear Vaclav, > For one project I started to use PIC16F721. I haven't noticed that it is > still not yet supported.
The PI16F72[01] parts are not yet supported in gputils, which is where SDCC / I obtain my information for the device headers and libraries (SFR names and addresses). So the first will be to get support into gputils (maybe Borut can help here?) and then bug me or more preferable this list or even better a feature request tracker again for support in sdcc. > How hard will be to get it supported ? >From my first glance at the datasheet, the device seems to be a regular (i.e., non-enhanced) 14-bit core. If that is the case, supporting it should be easy: include the device specification in devices/include/pic14/pic14devices.txt, add it to devices/non-free/lib/pic14/devices.txt, generate the pic16f720.c and .h files (from gputils header/p16f720.inc -- once it is there), recompile sdcc (at least the pic14 libraries) and you are done :-) If the 16f72[01]'s instruction set differs from the regular and enhanced devices, supporting them can easily take more time (weeks, even months). > I can help with testing, my application is not complicated, just USART, LEDs > and LCD 2x16. But time is going fast... I could write it in ASM, but SDCC > would be better. In the meantime, you can always build your project for a reasonably similar part (similar with respect to instruction set -- so far there are regular and enhanced pic14 devices out there). If you include the other part's pic16f<?>.c and pic16f<?>.h in your project, you can even change the addresses of most SFRs (those that are not accessed in precompiled libraries) to match those of the 16f72[01]. Compile for the device, obtain the .hex and flash it into the device -- IIRC the .hex file is processor-agnostic so that should work (the .o/.lib files have part codes encoded within them, preventing sdcc from building the library once for all "reasonably similar" parts). Be careful, though, with the config bits: getting them wrong might easily break something and in ... interesting ways. Hope that helps Raphael ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
