problem in uart communication!!!

[twhoney]

I followed UART library and done every thing as mentioned in library file including connections...
i using ATMEGA16A and 8Mhz crystal, but i cant communicate with pc....
wat ever i entered in the screen and transmitted it should be back,but the reply is always something like EEEEEEEEEEE....... what is my mistake?
how to communicate with pc using uart(rx and tx).

and when ever i build a program it shows Generated baud rate is 9615 bps (error = 0.16 percent)

how to generate accurate 9600 bps , help me........

The only Way to generate the correct Baudrate is to use a "Baudrate friendly" Chrystal.
Use 3,6864 MHz to run your CPU and you get an error of 0,0 % up to 230KBaud.

When you have ever read the Datasheet of your CPU you should know this.

Check the USART Section in the Datasheets. There are Tables of Settings and error Rates for the.

best regards from Germany

[Sulya]

I know it's an old thread, but I just want to help those who encounter same problem in the future.
Since MikroC compiler produces different code for different clock speeds to maintain right timing you can always change project's clock speed instead of replacing crystal.

In my case I was able to solve the issue by changing clock speed (in project properties) to 4.3 instead of 4 MHz, what resulted right timing for UART

[one25]

Hi all,

I am using crystal with 11.0592MHz frequency and this is the same I set under "edit project" menu.

I am getting the message
116 1509 Generated baud rate is 19231 bps (error = 0.16 percent)

Why ?

[filip]

Hi,

Which MCU are you using ?

Regards,
Filip.

[one25]

Hi, Filip,
I am using ATmega32.

Is interesting but I am no longer getting the message. Anyway, the communication worked and works well.

Thank you very much.