MMC Card Reader Development

This wiki describes the development of the MMC Card Reader Project

Architecture

• See here for block diagram

Development Roadmap

Phase 1

• Create stdio.h wrapper for file system in freertos_posix
• Use existing I2C EEPROM driver for development

Phase 2

• Circuit design for interfacing MMC

Phase 3

• SPI driver for MMC

Phase 4

• Test for normal read/write function
• hotswap (should not hang or cause voltage dip)
• multiple file read/write (protection)

Circuit and PCB

• SD Card connector
• SPI interface to main board

Software Implementation

• Use FatFs for accessing FAT16 file system.
• Create a stdio.h wrapper for freertos_posix

Comparison of FatFs and stdio API

• to be added