Comments on: Using IR remote with AVR MCUs – Part II

By: Kasamiko

Kasamiko — Fri, 27 Jan 2012 07:54:49 +0000

Sorry but it was never taught in medicine school…

By: Avinash

Avinash — Fri, 27 Jan 2012 06:23:59 +0000

6th year of schooling.

By: Kasamiko

Kasamiko — Fri, 27 Jan 2012 03:23:07 +0000

I’m sorry but what is “6th standard”?

By: Avinash

Avinash — Thu, 26 Jan 2012 03:17:47 +0000

@Kasamiko

“BTW I want to change the display code to HEX, any idea to convert it to HEX before being displayed on LCD?”

Pal those things are taught in 6th standard!

By: Kasamiko

Kasamiko — Wed, 25 Jan 2012 20:04:58 +0000

Hi Avinash,

I finally got it working…thank you so much for posting such a great tutorial…

BTW I want to change the display code to HEX, any idea to convert it to HEX before being displayed on LCD?

By: Kasamiko

Kasamiko — Sun, 22 Jan 2012 05:18:39 +0000

Hi,

Where can I find the schematic for the code above?

TIA

By: jayakrishna

jayakrishna — Fri, 20 Jan 2012 03:38:22 +0000

please tell the remote model,i have receiver but not remote

By: Avinash

Avinash — Sun, 11 Sep 2011 11:53:35 +0000

@Halfgaar

I wrote the lib many years back when I was new in this field. So their may be many faults (but NOT bugs).

I still use the lib in many projects but never required any modification to the actual lib.

By: Halfgaar

Halfgaar — Sun, 11 Sep 2011 09:44:11 +0000

Hi,

I’m trying to re-implement your lib to learn and to suit my slightly different needs. Anyway, I found a few things that may be helpful.

I think there is a bug in the Atmega8 driver, and perhaps others:

In the INT1 interrupt handler, you set TCNT0=0, but you’re using timer1. You should set TCNT1=0, right? Plus, TCNT[1|0] are 16 bit registers, which need special care to write to (interrupts need to be disabled while you do it).

Then, about the clockspeeds, why don’t you just do:

#define TIMER_INTERRUPT_AFTER_US (10)
#define us_to_timer_compare_match(time) ((F_CPU/1000000)*time)

Then set OCR1A=us_to_timer_compare_match(TIMER_INTERRUPT_AFTER_US)

I do and it works great.

By: Dinesh

Dinesh — Sat, 14 May 2011 15:21:25 +0000

Hi Avinash,
Thank you for this wonderful tutorial. I would like to use the internal 1MHz default oscillator. Is it possible to use this or should I have to use the external 8/12/16 MHz compulsorily?
Thank you
Dinesh

By: Abraham

Abraham — Thu, 02 Dec 2010 09:49:43 +0000

Just for the information of everyone, I used a BPL remote version RC1088N….and Car mp3 remote….

@Avinash: I forgot to mention I had to change the code at 3 places in the code remote.c. All were changing “char” to “int”. I made change for Qfront,Qend and i (occurs in ResetIR() and RemoteInit() )….thanx once again for your help…:)

By: Abraham

Abraham — Thu, 02 Dec 2010 09:39:12 +0000

Thanq so much….the code works superbly….thanx once again….:)

By: sandeep

sandeep — Fri, 15 Oct 2010 18:54:42 +0000

THANKS a ton….for such an awsome tutorial…it works well…
bestest site to learn AVR STUFFS..

By: Avinash

Avinash — Mon, 13 Sep 2010 03:16:09 +0000

@Nirmalya

My pleasure!

By: Nirmalya

Nirmalya — Sat, 11 Sep 2010 15:54:33 +0000

Hi Avinash,

Thanks a ton for the tutorial. For all of them actually. Works like a charm!
Really appreciate you effort in supporting novices like me.

By: Michelle

Michelle — Sun, 11 Jul 2010 07:01:20 +0000

hi Avinash,

I am using a c program in the microcontroller, but i have a problem regarding about how to add an interrupts to my program. It is about this that when i will send a signal from a remote contol it will bypass all the running programs and make priority to the signal fom the remote control.. Please help me with this one… thanks!
I can send you all the necessary info regarding with this. Again Thanks!

By: AVR Project - Remote Controlled Fan Regulator. | eXtreme Electronics

AVR Project - Remote Controlled Fan Regulator. | eXtreme Electronics — Sun, 04 Jul 2010 07:11:59 +0000

[...] remotely control the speed of an AC fan and to switch it on or off. The remote control is a cheap NEC Format remote, usually supplied with small DVD players. Three buttons are used to command the circuit. The UP key [...]

By: rajkumar

rajkumar — Sun, 13 Jun 2010 07:12:30 +0000

Thanks a lot avinash. Your website is just too good for freshers like me. I am getting a lot of help from ur tutorials.

By: KK

KK — Fri, 26 Mar 2010 03:18:29 +0000

Hi, Avinash,

I am using ATMEGA16 as my 1st atmega MCU.
I am trying to write prg to control DVD, TV, AVPC all together in a single remote unit. Before that I should decode the IR first, but I fail as I searched the web which 2 methods are good for that. One is ICP and the other is just a timer.

My fosc is 11.0592MHz without clock divde and fclk for ICP is 11.0592M/256=43.2KHz(23us). The capture mode is falling edge in ICP1 of timer1. I worked on CodevisionAVR, I think it is not related to platform. My timer0 is worked in 11.0592MHz/64=172.8KHz. Will interrupt priority caused problem????

I just think the time is fast enough to dectect :

NEC format
Most remotes here are NEC format. I tried two days. The result is disappointed. Therefore, can u help me a bit with sending me your successful code for further evaluation. Pls help…..Thank you!

By: kunal

kunal — Thu, 25 Mar 2010 08:09:53 +0000

Thanks Avinash,
it works.
i used TOSP 1730 and TOSP 1738 it works on both.
i used remote control BPL RC604 (it is available in any remote shop for Rs. 50).
Thanks again.