Comments on: AVR Timers – An Introduction

By: Abraham

Abraham — Sat, 28 Aug 2010 07:27:30 +0000

Awesome tutorials….I have gone through most of them…and they are so simple and elegant….I will be forever grateful to you..:) Do keep up the good work.

By: prabu

prabu — Fri, 18 Jun 2010 09:22:57 +0000

avinash good work

By: prabu

prabu — Fri, 18 Jun 2010 08:01:03 +0000

niece contents ……………….helpful 4 all beginners…niece approach with eg.

By: Servo Motor Control by Using AVR ATmega32 Microcontroller | eXtreme Electronics

Mon, 07 Jun 2010 13:06:48 +0000

[...] Introduction To AVR Timers [...]

By: time interrupt activated button avr « Msmihai's Blog

time interrupt activated button avr « Msmihai's Blog — Sun, 09 May 2010 19:31:46 +0000

[...] Here is a pretty good tutorial on the 8 bit timer. [...]

By: Kieron

Kieron — Thu, 01 Apr 2010 09:13:44 +0000

do u have any examples that i can look into for controlling two stepper motors at different speeds based on the situation it is in by using the interrupts. I have seen the examples of one stepper motor using timer0 but it was not very helpful because the steps of the motors are predefined and that is not the case in my project.

By: Kieron

Kieron — Thu, 01 Apr 2010 09:10:53 +0000

I have got some problem dealing with the timer0 and timer2 which are used to control the steps of two stepper motors on my robot. In order to use PID controller I will need the motors to change the speed according to the output of the controller. If I were to use the OCR0 and OCR2 (reducing/increasing) to change the speed of the motors, how would i know what is the speed the motors are going??for example i want the motors to move forward at 12.56cm/sec. I will have to enable the interrupt to increase the steps of the motors but how would i know what speed are they going at???

By: Andrejs Cainikovs

Andrejs Cainikovs — Sun, 28 Mar 2010 13:00:40 +0000

Sayantan,

Depending on the chip there may be few timers that you could use (megaAVR has max 4 of them). If you need to get one more timer you probably have two options:
1. Move to a chip with higher 16-bit timer count
2. Try to optimize your code so it will share your timer with another code.

By: Sayantan

Sayantan — Sat, 27 Mar 2010 10:06:59 +0000

I find your comments very helpful to me.Now I have a question
if I need multiple time-delay of various times,what to do ?I mean there is just only one 16 bit timer-counter,how to use it for all that time-delay?Please help me.

By: Claudiu

Claudiu — Wed, 03 Mar 2010 13:41:56 +0000

@Jay
same question throws in my head … but like Avinash said, you have to read again to understand.

(Answer: because the TIMER0 is 8-bit wide so it can count 2^8=256 clocks, but only one time it generate an overflow in those 256 clocks)

@Avinash
Keep up the good work … you are amazing !!!

By: Avinash

Avinash — Fri, 19 Feb 2010 07:42:53 +0000

@Jay

Why would anyone explain you the same thing that is written above?

Can’t you get simple arithmetic ???

By: Avinash

Avinash — Fri, 19 Feb 2010 07:41:51 +0000

@Jay

Didn’t you read 2nd Paragraph? Timer Overflow?

I get angry when I see questions like this.

When you not get anything you should try to read again.

By: Jay

Jay — Fri, 19 Feb 2010 07:36:52 +0000

Frequency of Overflow = 15625 /256 = 61.0352 Hz
Can some explain to me the logic behind dividing the Clockfrequency by 256.

By: sunil das

sunil das — Mon, 28 Dec 2009 13:51:03 +0000

i found it quite helpful for me ….it helped me clear my concepts and hope more n more such tutorials ..thanx a lot

By: Avinash

Avinash — Fri, 25 Dec 2009 04:24:16 +0000

@Verda

This is Wordpress !!!

By: Verda Fretz

Verda Fretz — Thu, 24 Dec 2009 18:20:41 +0000

Hi, what blog platform is this? Is it working for you or..? I would really like it if you could answer this question! Regards!

By: riyagiya

riyagiya — Fri, 23 Oct 2009 20:37:59 +0000

Hello Avinash,
I read your AVR timer Introduction tutorial. For every 1 sec here timer 61 overflow interupts. Can you please explain me how to Initialize a timer to generate a overflow interrupt for every 15ms?

By: Avinash

Avinash — Mon, 05 Oct 2009 11:18:48 +0000

I highly appreciate Mr Andrejs work of Finding and giving a solution to “abcd”.
-Admin

By: Andrejs Cainikovs

Andrejs Cainikovs — Mon, 05 Oct 2009 07:57:13 +0000

@abcd,

Check Nischey Grover comment on this page dated June 18th, 2009 at 4:40 pm, it will explain you how this code is working.

By: Avinash

Avinash — Mon, 05 Oct 2009 05:57:06 +0000

@abcd

Pls don’t flood with silly comments !!!!!!!!!!!!!!!!
If you don’t know relation between time and frequency pls go for some other profession.