pinkfluffyunic0rn / stm32flash

Trying to implement simple filesystem for flash device

STM32 VFS

Simple VFS for SMT32 MCU and FS for spi flash devices

Structure

• main.c — a simple terminal program to demonstrate and test vfs functions.
• uartterm.c and uartterm.h — API and functions that implement unix-like ternimal working through UART.
• driver.h — common interface for drivers in this project.
• filesystem.c and filesystem.h — common interface for filesystems in this project.
• w25.c and w25.h — driver that implement most basic function of W25Q SPI flash memory.
• sfs.c and sfs.h — A simple filesystem.
• rfs.c and rfs.h — Filesystem that resides in RAM.
• call.c and call.h — Implementation for system call not related to VFS.

What's done

• Filesystem mounting/unmounting.
• open/close and read/write calls in VFS.
• Simple filesystem, bad version of ext with built-in checksums.
• Naive implementations of malloc/free/realloc.
• RAM filesystem and that malloc/free/realloc calls.
• Common interfaces for filesystems and drivers.

What's not done

• Device files
• Page cache
• Separtion of character and block devices
• Unit tests