Comments on: Using the USART of AVR Microcontrollers.

By: sai

sai — Wed, 16 May 2012 13:44:09 +0000

i have that basic c prog ,but i still dont understand
3<

By: sandeep

sandeep — Fri, 04 May 2012 13:01:54 +0000

first of all great tutorials.. all of them. learned a lot from them, thanks for that
i have question ,i am making a temperature data logger means i have used LM35 to measure the temperature and display it on lcd, till now its fine and i have also checked rs232 separetly its also working fine…thanks to your tuts.
Now i want to send these readings of temperature to PC using rs232 only..where i can display it on excel sheet with time HOW CAN I DO THIS?? ..PLZZ GUIDE ME..

By: Soumyajit

Soumyajit — Fri, 04 May 2012 07:15:33 +0000

I am using Atmega128 MCU

By: Soumyajit

Soumyajit — Fri, 04 May 2012 07:12:47 +0000

HI, i just wanted to know if there are any specific library files i NEED to include as whatever program i am writing for USART communication, my AVRSTUDIO is returting errors like :
../usart.c:10: error: ‘UCSRB’ undeclared (first use in this function)
../usart.c:10: error: (Each undeclared identifier is reported only once
../usart.c:10: error: for each function it appears in.)
../usart.c:11: error: ‘UCSRC’ undeclared (first use in this function)
../usart.c:11: error: ‘URSEL’ undeclared (first use in this function)
../usart.c:12: error: ‘UBRRH’ undeclared (first use in this function)
../usart.c:13: error: ‘UBRRL’ undeclared (first use in this function)
../usart.c:16: error: ‘UCSRA’ undeclared (first use in this function)
../usart.c:17: error: ‘UDR’ undeclared (first use in this function)

By: zissan

zissan — Tue, 01 May 2012 09:36:38 +0000

Sir can i send a message from atmega8l connected to a mobile or we need a pc to interface this to device?

By: Atmega 32 programming for data transfer with clock synchronisation.

Atmega 32 programming for data transfer with clock synchronisation. — Mon, 30 Apr 2012 20:29:24 +0000

[...] (Master mode) or external (Slave mode). The XCK pin is only active when using Synchronous mode. http://extremeelectronics.co.in/avr-…rocontrollers/ http://www.avrfreaks.net/index.php?n…=18526&start=0 As I said I haven't used synchronous [...]

By: Sunny Ghuman

Sunny Ghuman — Sun, 22 Apr 2012 15:32:09 +0000

look you need to sync the pwm with ac waves. So u need to sense the ac waves with an opto isolator. See this

http://extremeelectronics.co.in/avr-projects/avr-project-remote-controlled-fan-regulator/

By: Sunny Ghuman

Sunny Ghuman — Sun, 22 Apr 2012 15:30:41 +0000

see this post
http://extremeelectronics.co.in/avr-tutorials/programming-in-c-tips-for-embedded-development/

By: Vishal G.Meshram

Vishal G.Meshram — Sun, 22 Apr 2012 09:00:37 +0000

Dear Sir

I want to control the speed of 230 V AC motor (submersible water Pump)through AVR 32A Mc. I have used PWM as well as also tried with 8 bit DAC (DAC0808) to Drive (BT12 A) TRIAC, but could not get the desired Output. Therefore need your help in this regard. What ckt should i use for controlling the speed of the AC motor,along with AVR 32A Mc.

please send me the solution on vishalmeshram2007@rediffmail.com OR
vishalgmeshram@gmail.com

Waiting eagerly for your reply

Regards
Vishal

By: rkb

rkb — Thu, 19 Apr 2012 16:54:28 +0000

( 3<

i can't ubderstand it

By: kalex

kalex — Sat, 10 Mar 2012 15:42:54 +0000

If you’re looking for PIC samples go to mikroe.com but if you know “C” or “Pascal” the codes here are the same for PIC & AVR when you set the baud_rate and TX or RX a byte. the difference is in assembler code.

By: RS232 Communication – The Level Conversion | eXtreme Electronics

RS232 Communication – The Level Conversion | eXtreme Electronics — Sat, 04 Feb 2012 07:01:24 +0000

[...] Using the USART of AVR Microcontrollers. [...]

By: Sa'eed Uthman Ahmad

Sa'eed Uthman Ahmad — Thu, 05 Jan 2012 12:21:50 +0000

Good Afternoon sir, thanks for your assistance that you have been rendering to many people, please sir i want a concise and comprehensive tutorial on PIC MICROCONTROLLERS because i am facing my final year project which is based on this type of MCU also i am appreciating the kind of simplicity of language you are using on this AVR MCu tutorial, Pls sir I need also the basics of LCD tutorial which is this part of your tutorials hoping my problems will be solved. Thanks Sir Avinash

By: jesus

jesus — Sun, 04 Dec 2011 05:05:59 +0000

Man I’m from mexico and my english is not the best but my congratuelations to you, this really helped me with my projects

By: Mike

Mike — Fri, 04 Nov 2011 13:59:05 +0000

Hello.How can I get/make a serial bootloader for an ATMEG16-16PU running at 16MHz? If the microcontroller has a bootloader (for 13.5Mhz) cold it be erase? Sorry if the subject is off topic.
Thanks

By: Armen

Armen — Fri, 08 Jul 2011 11:56:30 +0000

Seems that UBRR is no longer directly handled via AVR Studio 5, immediate 16bit (2xregister) writing on UBRR doesn’t work, you should specify UBRRH,UBBRL independently.

By: Avinash

Avinash — Wed, 08 Jun 2011 02:33:18 +0000

@Mahadi,

See this

http://extremeelectronics.co.in/avr-tutorials/programming-in-c-tips-for-embedded-development/

Also remembering one fact will help you

“We are writing programs in C”

So you must know C language (this is NOT a magical advice!)

If you knew C you already understood the above line !!!

By: Mahdi

Mahdi — Tue, 07 Jun 2011 14:42:11 +0000

Hi dear Avinash
Where can I find some tutorial to better understand of bitwise operations you use in functions? For example, what does this mean? !(UCSRA & (1<

By: PradeepKumar P

PradeepKumar P — Wed, 25 May 2011 12:19:15 +0000

Hi
It is very usefull to us….

By: Marylou Lapar

Marylou Lapar — Sat, 21 May 2011 21:28:38 +0000

I love your blog, great article, many thanks!