Here is a list of all files with brief descriptions:
  audio_spe.c | STw5094a audio codec init and management |
| button.c | Common Button and Joystick initialization and management |
| buzzer.c | Common Buzzer functions with RTTTL format support |
| buzzer_spe.c | Buzzer dedicated functions with RTTTL format support |
| circle_api.h | General header for the STM32-circle projects |
| circle_spe.h | STM32 platform specific declarations |
| cx.c | Generic functions for the extension connector |
| diskio.c | |
| dma2d_graphic.c | Specific API functions used for the STM32F42x DMA2D controller |
| dma2d_graphic.h | Types definitions and declarations for the STM32F42x DMA2D controller |
| draw.c | Various utilities for drawings (characters, ..) |
| ff.c | |
| ffconf.h | |
| fs.c | Filesystem OS layer |
| lcd.c | The common LCD functions |
| lcd_spe.c | The LCD driver for the ILI9325 |
| lcd_spe_IL9325.c | Common functions for Open4 platforms with ILI9325 controller |
| led.c | Common LED management |
| list.c | General functions to handle list with touchscreen |
| mems.c | Common Mems management |
| mems_spe.c | Mems Initialization and management |
| menu.c | General management for menu, dialog boxes .. |
| menu_settings.c | Management of a menu that allows to set up the STM32-primer |
| pointer.c | Various utilities for the pointer management |
| power.c | CircleOS shutdown driver |
| power_spe.c | CircleOS shutdown driver |
| rtc_spe.c | RTC clock management and utilities |
| toolbar.c | Common various utilities for touchscreen toolbar |
| touchscreen.c | Common touchscreen routines |
| Util.c | Various common utilities for CircleOS |
| Util_spe.c | Various harware specific utilities for CircleOS |
 Util_spe2.c | Various harware specific utilities for CircleOS |