Add Assembly Language Code Before CCS sets up C run time env

Gauges · Joined: 24 Feb 2011 Posts: 1

I need to add code to enable the watchdog timer and set up low voltage detect that executes immediately just after the microcontroller is reset.

I cannot wait for CCS to setup the C run time environment, initialize the variables, etc, etc. Setting up the watchdog must come first. This is to eliminate an EMI compliance issue.

How do I accomplish this?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Months ago, I emailed CCS with a request that they add a #build(noinit)
option to the compiler to leave off the start-up code. I haven't seen it
be added so I guess they blew off my suggestion.

temtronic · Posted: Thu Feb 24, 2011 1:59 pm

Ok, I have to ask, what EMI issue? Is the PIC radiating it ? airborne or through connections ?
There is no 'C runtime environment'..watchdog timer is a fuse selection..

Airborne EMI fix...put in metal box..

Connections EMI fix...add ferrites and appropriate caps on the I/Os

Need more info, if you show us a very small code example it'd help.