Stm32(cortex m3) project: Touchscreen click & drag scrolling with microcontroller Stm32

This is a continue of "beatstream project". I've update firmware implementing library to create fully customizable window (size and position window, color bar, header, background,object select,font) with touchscreen scroll. You can scroll up and down to select your item. The effect is similar to Iphone or android mobile (obviously not the same! XD ). The entire project works without O.S..Contact me for info or comment ( always welcome ).

STM32 ( cortex M3 ): microsd card touchscreen audio player with spectrum display

This is an update of project STM32: microSD Wav audio player with touchscreen.This version has a spectrum display during playback. I used DSP library for ARM Cortex-M3 based STM32 microcontrollers available from ST Microelectronics website. This license-free, and royalty-free DSP library holds large number of valuable functions coded in C or assembly language (as FFT ) including PID controller, Fourier transform functions, and a selection of digital filters such as 16-bit FIR, IIR direct-form, and IIR canonical-form filters.
The DSP library can be used with the IAR, Keil Toolchain for the STM32.
Alternative DSP functions for Cortex M3 are avaible at http://www.embeddedsignals.com. 

Download ST microelectronics DSP library 

STM32 ( cortex m3 ): piano with touchscreen and PWM

Play Piano with touchscreen!! I used PWM to generate a note.
I used a GUI, touchscreen library created for a project STM32: microSD Wav audio player with touchscreen .
Varying the frequency of PWM you can generate a single note.
For frequencies click on this link.