PWM(Enhanced) on 16F690 using CCS C compiler 4.038

Yasinji · Guest

HOw can I use the all the 4 PWM channels to work in independently using enhanced pwm with pulse steering mode so that I can control the four channels with different duty cycle. Kindly provide a solution as soon as possible as I am in a dangerous situation of loosing my Job. I have to use one PWM for battery charging, another for load control, another 2 channels for the current control. Kindly provide a solution.

Ttelmah · Guest

You can't.
Get away from the idea of having 4 PWM channels. MicroChip, is unfortunately slightly less than clear in it's wording about this....
You have _one_ PWM channel, with up to four outputs.
Because there is only one PWM channel, you can develop only _one_ pulse width at a time. You can 'steer' this to the different pins, but while one pin is driven with a particular duty cycle, the others _will_ be idle (left either high, or low).

You need to select a chip that has four independant PWM duty cycle generators.

Best Wishes

YASINJI · Guest

can u kindly suggest a device with four independent duty cycle generators

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

http://www.ccsinfo.com/forum/viewtopic.php?t=37738

ckielstra · Joined: 18 Mar 2004 Posts: 3680 Location: The Netherlands

As a further comment, do not use v4.038! This is a very unstable release. Read the sticky v4 thread on top of this forum for more info, but it comes down to CCS having released a lot of alpha versions before the compiler became more or less usable around version 4.065.

Guest · Posted: Fri Jul 10, 2009 4:00 am

dyeatman · Joined: 06 Sep 2003 Posts: 1923 Location: Norman, OK

Try using the Microchip Advanced Part Selector...

http://www.microchip.com/maps/microcontroller.aspx
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