pic 16C765, using USB C source

Hmm I have exactly the opposite problem. I want to use asm with a PIC18F2450 (the new,improved usb chip) and all I can find is C code. The only asm code I can find is for the PIC16C765 (as you found). Go to the Microchip web site and search on usb.

Hi Dennis,

I would like to know why C code is not good for what you want to do ??

Getting the C code as a reference, you could re-write it and know the code works out of the box (app note).

Only very little code needs to be in assembly anymore.

I am just interested in what the attraction to assembly is.

I do all my PIC, x51, AVR, 6502, Z80, projects in C.

I have not done a project in Assembly in years.

Thanks for you feedback.

Donald

May be something useful here:

I'm doing this at home as a hobby and am too cheap to buy a C compiler for the PIC (the free ones seem rather limited). I spent years as an asm programmer in my early career. For the PIC architecture it is rather hard for a compiler to generate as good a code as I can do in asm. Most of my projects have been small ones and 1K or so of code in asm isn't a big deal. Particularly if you have built up some macros and common routines. And yes I have done hand compiling and may end up doing that here.

In my day job I use C and C++ so the language isn't a problem. In fact for architectures such as Power I wouldn't even try to beat the compiler

- it does a much better job of keeping track of multiple execution units and condition code registers than I want to.

I suppose I should give in to the AVR crowd and use the GNU tool chain - at least the AVRs have a somewhat C friendly architecture.

Ok, I can understand that.

I have used the GNU compiler for severial chips (8 and 16 bit), not bad for free. But I always buy a compiler with support for paying projects.

Back to the C code for the PIC18F2450, what app note or code sample did you find.

Thanks

Donald