Hi Guys
I am romuald , and i am a beginner when it comes to microcontroller programing (c language ) .
i have downloaded some testing codes from cytron DIY projects [ namely DC brush motor ]. and i was able to go through almost everything except , the pulse frequency setting . How we set it , and how we can change it on our will .
here follows the codes.
//PWM frequecy set as 4.88KHz
PR2 = 0xFF; //PWM Period Setting
T2CON = 0b00000101; //Timer2 On, prescale 4
i am using a pic16f877a , with an oxillator of 20Mhz
thanx in advance .
DC Motor speed control
3 posts
• Page 1 of 1
DC Motor speed control
by Kromuald13 » Thu Feb 10, 2011 3:53 pm
- Kromuald13
- Posts: 26
- Joined: Wed Feb 09, 2011 2:03 am
Re: DC Motor speed control
by robosang » Thu Feb 10, 2011 8:27 pm
Most of the thing come from datasheet, if I am not mistaken, in datasheet of that particular PIC, PWM chapter, there is a table show the relationship between PR2 and frequency or period. It has to do with the Timer 2 prescaler, hope this help. 
- robosang
- Posts: 1239
- Joined: Wed Jun 10, 2009 5:37 pm
Re: DC Motor speed control
by Kromuald13 » Tue Apr 26, 2011 1:05 pm
robosang WROTE:Most of the thing come from datasheet, if I am not mistaken, in datasheet of that particular PIC, PWM chapter, there is a table show the relationship between PR2 and frequency or period. It has to do with the Timer 2 prescaler, hope this help.
thx man , it was very helpful
- Kromuald13
- Posts: 26
- Joined: Wed Feb 09, 2011 2:03 am
3 posts
• Page 1 of 1
Who is online
Users browsing this forum: No registered users and 3 guests