On Remote RX station the Value of PORTC sent on AIR will be latched on its local PORTC */ * Keep transmitting the Value of Local PORTC to the Remote Station.

Initialize the USART with Baud rate = 2400bps Reads and returns a byte of data from the buffer.Ĭomplete Listing of Tx.c #include #include #include 'usart.h' void main()

Returns the number of byte of data currently waiting in the fifo queue. This function sends a byte of data over the Tx channel. The USART of AVR Microcontrollers : Reading and Writing Data Just leave this article and read the following articles UBRR? Its not the topic of this article! I assume that you know about theīasics of RS232 communication and have knowledge of USART. Some important functions of USART library are as follows How to add a file to avr studio project is given here. These files must be copied to the current project folder and added to AVR Studio Interrupt driven USART library for usart related job. For project management AVR Studio was used. The software is written in C language and compiled using the open source compilerĪvr-gcc. You can then use the same techniques of sending/receiving data in any other For testing you can press keys on the Tx side andĬorresponding LED on the Rx side will glow. Switches on the PORTC of Tx station and 8 leds Put in the PORTC of Tx station is available on PORTC of Rx station (8bits or To the RX unit where it is latched on its PORTC. The value at PORTC of TX unit is constantly sent over the air One is Tx (Transmitter) and Other is Rx (Receiver).īoth units are based around ATmega16 MCU(you can use ATmega32 also) on externalġ6MHz crystal.

Write High Fuse = C9 (HEX Value) and Low Fuse FF.

Use the exact frequency crystals as used in the designs.

I request all users to follows the instruction exactly as given (unless theyĪre smart enough to know what they are doing). It and get it working you will have enough information and experience to make Transfer a byte of data from Tx station to the Rx station. The application is very simple in this case, just to Part III will be covering mostly the practical part, i.e. I have introduced the basics of RF Communication.Ĭommunication Between Microcontrollers – Part I : Introduction toĬommunication Between Microcontrollers – Part II : Algorithm and Welcome to the 3rd part of RF Communication tutorial.

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