Keil MicroVision is a free software, we use it for embedded program developing. In this software we have provided a platform to write a program using text editor, compile program to convert source code into machine language i.e. compiler will convert source code into hex file. Here is simple guidance for How to write programs in Assembly language or C/C++ How to Compile and Assembling Programs How to Debug program Creating Hex and Axf file Test a program without Available real Hardware (Simulator Mode) Here a program to write a data 55H to port 1 and complementing data after some time delay is explained. Following is the process of writing program in Keil ,its execution and Debugging : Step 1: Open Keil uV3 Step 2 : After opening Keil uV3, Go to Project tab,create New Project ,select new folder and give name to the Project. Step 3 : After Creating project following window will pop-up. Now Select your devi...