STM32CubeF4 Embedded Software Platform

This application demonstrates how to implement a USB Host Mass Storage Class (MSC) using an STM32F412xG device in an RTOS-enabled configuration. It utilizes the USB OTG Host peripheral to interact with USB flash disks using Bulk Only Transfer (BOT) and SCSI commands, integrated with the FatFs middleware for file system operations.

Key features include:

• Device Enumeration: Automatically detects connected USB flash disks and extracts metadata (VID, PID, Manufacturer, Serial Number, Product Name).
• File Operations: Ability to write small text files and explore disk content.
• RTOS Integration: Built around FreeRTOS and the CMSIS-OS abstraction layer.
• User Interface: Uses an LCD screen (via Adafruit 1.8" TFT shield) and a joystick to navigate menus and display disk contents.

The Templates_LL project is a reference template designed to help developers build firmware applications using the Low-Layer (LL) API. It provides a foundational project structure for the STM32F469xx device, specifically tested on the STM32F469I-DISCO RevB board.

Included features:

• LL Driver Inclusion: All LL drivers are included via main.h and source files. In IDE environments, ensure the option USE_FULL_LL_DRIVER is enabled.
• Hardware Definitions: Definitions for LEDs and the user button are provided in main.h.
• Clock Configuration: Initial clock setup is provided in main.c via the SystemClock_Config() function.

Note on Optimization: To optimize the final binary, you can manually remove unused LL drivers after initial development.

This application demonstrates how to interface a camera module via the Digital Camera Interface (DCMI) to display images continuously on an LCD and save captured images to a USB device.

Key Features:

• DCMI Interface: Configured to receive captures from a camera module (specifically tested with the STM32446E-EVAL board).
• DMA Transfer: Uses DMA2 Stream1 channel1 to transfer picture data from the DCMI peripheral to external RAM, which serves as the LCD frame buffer.
• Resolution: Both the camera module and the LCD are configured for QVGA image resolution.
• USB Storage: When the tamper button is pressed, the current image is saved to a USB disk.

Status Indicators:

• LED1: Turns ON to indicate the end of a saving operation.
• LCD Messages: Displays notifications at the beginning and end of the saving process.
• LED3: Turns ON if any error occurs.

The LCD DSI Images Slider application demonstrates the capabilities of the Display Serial Interface (DSI) peripheral by displaying high-resolution images (800x480). It utilizes Tearing Effect and Partial refresh features to allow rapid, user-triggered updates to specific LCD regions.

Key Features:

• Image Transition: Moving a finger on the Touch Screen (TS) causes a new image to progressively appear while the old one disappears.
• Draw Modes: Supports both HORIZONTAL_DRAW (default) and VERTICAL_DRAW modes.
  • In HORIZONTAL_DRAW, sliding left/right changes images.
  • In VERTICAL_DRAW, sliding up/down changes images.
• Mode Switching: The user can toggle between draw modes by pressing the Tamper button.
• Hardware Initialization: The application initializes QuadSPI to load images, followed by the Touch Screen (TS) and LCD DSI.

The STM32CubeF4 MCU Package provides a comprehensive embedded software platform for the STM32F4 series, including:

• CMSIS modules: Core and device modules for the ARM core.
• STM32 HAL-LL drivers: Abstraction layers for maximized portability.
• BSP drivers: Board Support Package drivers for supported evaluation, demonstration, or Nucleo boards.
• Middleware libraries: RTOS, USB, FatFS, graphics, touch sensing, etc.
• Software projects: Applications, demonstrations, and basic examples located in Projects/*Board name* directories.

This application demonstrates how to use the STM32Cube firmware with the FatFs middleware component as a generic FAT file system module. It specifically exploits FatFs features using a microSD drive configuration on an STM32F412ZG device.

The application workflow follows these steps:

1. Link the uSD disk I/O driver.
2. Mount the file system object to the FatFs module.
3. Format the uSD drive to create a FAT file system.
4. Create and open a new text file with write access.
5. Write data to the file.
6. Close the file.
7. Re-open the file with read access.
8. Read the data back and verify it.
9. Close the file.
10. Unlink the uSD disk I/O driver.

Status Monitoring (NUCLEO-F412ZG Rev B):

• LED2 ON: Application running successfully.
• LED3 ON: An error occurred.

The LTDC Paint application demonstrates how to configure an LCD touchscreen, handle touch zone actions, and save BMP pictures to a USB Disk.

Key Features:

• LCD & Touchscreen: Configures the LTDC (LCD-TFT Display Controller) and initializes the touchscreen with a calibration step for improved accuracy.
• Drawing Interface: Provides a menu with a color palette, brush size selection, a working rectangle for drawing, and icons for 'Clear' and 'Save'.
• USB Storage: Allows saving the drawn picture as a BMP file to a USB Mass Storage device.
• Status Indicators:
  • LED1: Turns ON to indicate the end of a saving operation.
  • LED3: Turns ON when an error occurs.
  • LCD Messages: Displays status messages indicating the start and end of saving operations.