I have applied the patches and the modified .h and .c files of interest are attached in the tarball along with this email. I haven't recompiled and reinstall sdcc as I don't really know how to do so with a nightly snapshot tarball, nor am I sure if the modified source files with the sdcc are modified correctly. How would I disable adc_int in adcval function? Do I turn off all the ADIE bit when I read the a/d conversion value, and then turn it back on?
Cheers, Stanley On 10/29/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > Stanley Lee schrieb: > > Hi, > > > > Here's more news about the progress so far. I have added Jan's code on > > the initialization in the initialization.c file. My quesiton on the > > initialization is the fact that I'm unsure of how I should deal with the > > first parameter of adc_open function. I have typed in my guess after > > looking at adc.h, and indicated my doubts on my initialization.c. > > See my patch (link was in the last mail) for the pic18fXX50 devices. The > adc_open, adc_setchanel and adc_busy functions dont work for pic18fXXXX. > You need to apply the patch,edit the #if defined and recompile/install > sdcc to make the adc library work for pic18fXXXX devices. > All #if defined should look like: > if defined(pic18f2455) || defined (pic18f2550) \ > || defined(pic18f4455) || defined (pic18f4550) \\ > || defined(pic18f2525) || defined (pic18f2620) \\ > || defined(pic18f4525) || defined (pic18f4620) > Remember to do this in adcsetch.c, adcopen.c, adcbusy.c and adc.h > Hopefully this patch will someday be part of sdcc. > > > > > I have a separate source file (adcisr.c) that deals with the a/d > > conversion ISR. I have basically incorporated Jan's code, except I have > > modified it to work for one a/d channel (AN0) to free up the other > > channels as I only need to sample one channel. I have also an accessor > > function that allows me to access the a/d channel input values from any > > other source file of my project. > One advice here: > You need to disable the adc_int during your adcval function. If you dont > then there is a slight chance that your read garbage when the interrupt > is triggered during the function call. > > > However, when I tested my code using > > the PWM toggling method. I don't seem to see a PWM output at the > > corresponding port B pin no matter how I vary the voltage input from > > adjusting a potentiometer. I infer that there is something wrong with > > the structure of my project as I have limited experience working with > > multiple source files (I don't want to squeeze everything into a single > > main.c file either). > This is mainly because of the missing patch. Apply it as described above > and retry it pls. > > > > > Any insights would be much appreciated. > if your really need pwm pls use the pic pwm modul. > > jan > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Sdcc-user mailing list > Sdcc-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/sdcc-user >
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