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If so, do you need dead time between the positive pulses on the two outputs? Should I use input capture to trigger the ADC at the rising edge?. Hello Ted, thanks again for your help.
PWM period is 1ms – I just gessed this. I also set the maximum and minimum frequency at kHz and 50kHz, respectively. June 12, at 8: I have wrote something using your codes. I want to make it so that the can read a flex sensor and control a servo.
But Iam having difficulty in configuring the ADC vspic respond to an dspiv trigger for start of module. August 28, at More precisely, I will use a sensor to measure the output voltage from dspci PV, this sensor is scaled from volts, the information from this has to pass through an ADC and the result from the ADC will be used as the reference value of the PI controller.
July 1, at 5: November 19, at 7: In the meantime, if you get a second, maybe you could take a screenshot of the simulink model and throw that into dropbox too?
June 9, at 4: But still i couldnt achieve the perfect 50 Hz waveform. According to the datasheet for the HD, it accepts pulses between 0. I can not to synchronize the PWM signals to the source signal. However, if as is usually the case the microcontroller needs to be doing other things at the same time reading sensors, etc then a little more coding will be required.
TED I am using dspic30f and i want to rotate my pmdc motor clockwise and anticlockwise simulatneously by degree means it must start from 0 to degree then return from to 0 degree and this process must be continuous. This reference is one sinus, which has frequency 50Hz and i control its peak and its dc value through two trimmers respectively. Without some kind of feedback, the only thing you can do is turn the motor on for a specific length of time and hope ot moves about degrees.
Sorry about the delay. Perhaps one of these will provide a starting point for what you want to do?
The three things are:. If you hear the servo grinding in what sounds like a bad way, turn off the power and double check everything! Hi Abdel, So, are X1 and X2 both sinusoidal, but 90 degrees out of phase with each other? November 3, at 4: At zero volts it means that it is dark and at 2 volts it means that the light is at its maximum point.
Thanks for letting me 40111. January 10, at 3: However, since you only need to move to two specific positions 0 and something simpler might be sufficient.
dsPIC-Ready1 Board | pin dsPIC – MikroElektronika
I must controlling LED blinking with potentiometer. Reference Manual Download All. I used the default location dsplc my machine which is: CE – External interrupt pins – Configuration and Use. How these duty cycle values are calculated? If those stops have become broken, it cannot be assumed that the angle sensing is working as normal, which would explain the continuous rotation.
Can you post it online and include a link in your reply? Both are capable of easily generating simple PWM signals, for example.
June 7, at 5: For pricing and availability, contact Microchip Local Sales. In both cases a timer which runs in dspjc background drives the generation of the output waveform. The variance go through one PI controller, with limited output between 0. Create a free website or blog at WordPress.
If so, there are a couple of ways to do it:. Since I am new in the field of programming I have very little knowledge on how to get started. Thank you for your time, Regards, Song.
Also, please take a look at the following Wikipedia article on PID control. And I could only understand part of the code, so I do not know what is sspic supposed vspic.
Hello Mr Ted, I would like to ask you if you have my simulink files I have dspid you the other time. Basically I have to design a closed loop system between a converter and a PV. Your blog is a great resource for dsPIC enthusiasts.
Hi Ted, Thank you for your response. March 25, at 3: June 11, at 8: However, having experienced persistent problems after upgrading from version 8.