MMC Card Reader
Contents
Objectives
MultiMedia Card (MMC) is commonly used in portable devices due to their high density, rewritability and low cost. The use of MMC in embedded systems enables the systems to possess a removable, upgradeable and external mass storage.
MMC Manufacturers usually formats the cards in FAT12/FAT16/FAT32, and can be read/write in almost all computers. This project aims to integrate a FAT file system in freertos_posix for reading/writing files in MMC by 8/16-bit embedded systems. The API employs POSIX and Standard C-library standard for I/O operations.
Benefits
- Save large files (e.g. html) for application feature expansion
- Provide storage space for upload and upgrade firmware remotely (e.g. over the Internet)
- Save fonts, image files for GUI applications
Limitations
- File read/write access may be slow
Architecture
- See here for block diagram
Development Roadmap for MMC Card Reader
- Contains directions for development
Circuit and PCB
- SD Card connector
- SPI interface to main board
