I am currently working on a large project using the 17C756 and the MPC
compiler.  I can say for certain the MPC compiler does support the 756.  It
does have library routines for the peripherals you mention, but I am not
sure that it supports I2C in master mode utilizing the 756 hardware support
for master mode.  I doubt that it does but don't have my manual handy at
the moment.  Over the eight months that we have been working on this
project we have found around 15 bugs with the compiler.  Walter at
ByteCraft has been pretty responsive in fixing most of the bugs when they
were real show stoppers, but there still remain a number that we have to
work around.  Plan on checking the compiled code for the first while until
when something doesn't work as intended.  In fairness to ByteCraft, I
beleive this reflects on a much higher percentage of uses compiling for 16C
parts which I have not heard any complaints about bugs.  Also, I beleive
they are working on a new version of the compiler with substantial
enhancements, which would no doubt address these problems.

I do not have any direct experience with other C compilers.  ALthough we
are using most of the peripherals you mentioned, we have not used any of
the library support routines included with the compiler.  This doesn't
refelect on the routines, it just seems that we needed the absolute control
of the behaviour by coding our own.  Didn't use I2C at all.

The other compiler we are trying at the moment is the one from IAR and
although it costs quite a bit more, I would give it a serious look.

At 10:05 PM 99/05/09 +0200, you wrote:
>Hello everyone,
>
>Having made a mistake in purchasing MPLab-C17 two years ago and finding it
>unable to correctly assemble a while or do...until loop for the 17C44 I want
>to gather some info on MPC, which from previous discussions on the list
>seems to be the compiler to go for. So here goes:
>
>1. Has anyone here used MPC with the 17C756 before?
>2. Is the 17C756 supported yet?
>3. If so, is the I2C master implemented using the built in hardware module
>yet?
>4. And the A/D converter?
>5. Has anyone used the an I2C EEPROM with the 17C756 and its hardware I2C
>module (C or otherwise) - comments, problems?
>6. How well does MPC integrate into MPLab?
>7. Any other comments about MPC or another compiler?
>
>Thanks in advance for any comments - I have a fairly large and processor
>intensive project in the workings, and have had enough of assembly - I have
>paid my dues, and gained a very good understanding of the inner workings,
>but simply don't have time to code this one in asm.  My reason for using the
>17C756 is that it has the built in A/D and extra capture and PWM modules,
>which I need, and the price difference from the '44 is negligible
>considering some of the other necessary components in the application.  And
>its available!
>
>Cheers
>  Roland
>
>
Regards

Bob Bullock
KoolKits Electronics Ltd.
bobb@koolkits.com
www.koolkits.com