harlequin-tech/flashHQ

A low-level AVR library and simple file system for Adesto SPI serial dataflash chips.

A library for the adesto AT45DB family of SPI serial dataflash chips.

This library provides low level functions to read data, erase data, and write data to the serial FLASH chips.

It also provides a basic flash filesystem designed to minimise the RAM needed for file operations while ensuring good performance.

Examples

Example code to format the flash chip and create a file.

#include "flashfile.h"

flashFile_t file;
flashInit();    // Initialize flash memory
flashFormat();

int res = flashCreate("test.txt", &file);
if (res < 0) {
    printf("Failed to create test.txt, res=%d\n", res);
while (1);
}

res = flashOpen("test.txt", &file);
if (res < 0) {
    printf("Failed to open test.txt, res=%d\n", res);
    while (1);
}
for (uint16_t fill = 0; fill < 4096; fill++) {
    flashWrite(&file, &fill, sizeof(fill));
}
flashClose(&file);

Notes

1. The flashfile system is in an alpha state, still being tested and developed.