and the Loop example u gave me was of Immense help.....thanks once again colin On Mon, Sep 5, 2011 at 2:37 PM, Xavier Pereira wr= ote: > thnks a lot , I got and Idea how to write the loop .. but how can I cause= *Timer to output PWM signal > * having a* dutycycle* of 40% and *switching frequency* of 80KHz ? > thanks a gain > > > On Mon, Sep 5, 2011 at 1:49 PM, cdb wrote: > >> ::I need to write a control loop. Help please ..just give me some hints = to >> ::write tha control loop... >> >> Xavier, >> >> Wasn't my reply to your main thread of any help? >> >> If you want to control a SMPS, then the BLDC app note I listed might be = of >> help or even look at one of the control loops that Microsoft use. >> >> This is sample code for a Buck/Boost convert for a Pic33F >> >> http://ww1.microchip.com/downloads/en/DeviceDoc/Buck-Boost%20Converter%2= 0PI >> Ctailplus%20SourceCode%20for%20dsPIC33FJ64GS610.zip >> >> This is for a buck converter with PID control >> >> http://ww1.microchip.com/downloads/en/DeviceDoc/CE021_PID_SMPS_GUI_14aug= 09. >> zip >> >> This is for a PWM SMPS using dsPics. >> http://ww1.microchip.com/downloads/en/DeviceDoc/CE020_Std_PWM_120309.zip >> >> This is for a dsPic SMPS with ADC >> >> http://ww1.microchip.com/downloads/en/DeviceDoc/CE031_ADC_Trig_PWM_12030= 9.z >> ip >> >> Colin >> >> -- >> cdb, colin@btech-online.co.uk on 5/09/2011 >> >> Web presence: www.btech-online.co.uk >> >> Hosted by: www.justhost.com.au >> >> >> This email is to be considered private if addressed to a named individu= al >> or HR department, and public if addressed to a blog, forum or news >> article. >> >> >> >> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > > > > -- > Keep Your Head High > --=20 Keep Your Head High --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .