I have STM32 Discovery KIT which have 3.5inch Touchscreen.
i havnt used this kit, but now i have to develop a GUI in no time
i have knowledge of Microcontroller
Can anyone help to to make a simple GUI, having a single button which can trigger any digital pin on hardware.
tell me which software i should use and steps to make that happen
Never used one but a little search on st.com gave this link . just go through the gui example, they should have certain touch and gui libraries i believe. Other than that, there are tonnes of examples and sample codes all over the internet. All the best.