generation of different waveforms with microcontroller

[krivan]

Hi folks,

I have an application where I have to generate a clock for a chip and control five cmos switches. I am totally new to microcontrollers that's why I would like to know which controller would be the best choice for this?

The switches should operate independently, so it would be great to find a controller which can output 5 completely different waveforms of square signals with adjustable duty cycle and frequency.
So practically it should be a frequency synthesizer but with a controller, not on-chip.

Is there a smart way to do this? I appreciate every hints, comments, etc.

Krivan

 

[ilker]

Hi kerivan,
If freq. about 10-100 Khz is enought, i can give a hint.

for HW side,
R/2R network is suitable for this application, you can find info in attached pdf.
But keep in mind youu need hi pin count microcontroller, because of 5 discrete output requirement. for example you need 5x6=30 GPIO for 2^6=32 output level.

For SW,
You can build a lookup table for different waveforms, and simple algoritm ...

Good luck.