STK 500 Development board

introduction

Lot of circuit, with AVR microcontrollers, around the internet are stand-alone circuits. In this project we will control some AVR microcontroller (MCU) via Visual Basic 6.

The use-range of this application is very high. You can make, anything you want, that its need control from PC computer or some circuit that is collect data from somewere, and at the end, its give this data to PC computer via RS232 port to our software.

As you understand, this project is in general form, to give you the information for how to control the MCU. You Can modify the source codes to make your circuit, for personal use, but you CAN NOT use any part of this project for commercial purpose, for free. For commercial purpose you have to pay some small amount, for the copyright. infos at:   My email 

The hardware

You can use for the experiments, some AVR development unit like MCU100, STK200, STK500 or some else that is contain 8 LEDs, 5 switches or more and some RS232 chip like MAX232, MAX202 etc.

Alternative, you can build your own board with this characteristically.

Schematic of AVR RS232 interface (click to enlarge)

MCU 100 Delevopment board

The software

The software  named "AVR RS232 interface" its writed in VisualBasic 6. Its constituted by the general mask and "about" mask At the general mask you can choose the com port that you have connected the AVR board ( For  deveropment boards I mean the spare RS232 connector, not the connector that you programming the MCUs ).

On the "Switches on interface" frame, have 5 green cycles. If you press any of 5 switches on the AVR board, this cycle will be red color, the value of the received character can be viewed in binary format, at the below textbox .

On the "LEDs on interface" frame, you will see 8 buttons with green color. When you press some button you will see that the current led on AVR board will be turn-off. If you press again the button, the LED will be turn-on. The value of sended character can be viewed in Decimal and ASCII format in two below textboxes.

You can exit from this software by pressing "Exit" button.

The software, to control some AVR MCU, writed in Visual Basic 6.

The executable and the source code of AVR RS232 interface, in Visual Basic 6, can be downloaded from here: AVR RS232 interface.zip

The schematic, HEX firmware and source code (ready for AvrStudio) of AT90S2313 can be downloaded from here: Firmware of RS232 interface.zip