Atmel DataFlash for Maple

About

This is a fork of the BlockoS's arduino-dataflash repo that aims to be a high-performance LeafLabs Maple library.

This library is intended for libmaple use, but MapleIDE support and examples will be added in the future.

Benchmarks

The below benchmarks were computed using the main-Benchmark.cpp application. They are only rough benchmarks as the tests are not very solid.

The benchmarks were ran using 528-byte buffers, and include 16 pages of read/writes. The SPI peripheral was configured for a 18 MHz clock speed, MSB First, Mode 0.

The unit uS represents microseconds. The unit Bps represents bytes per second.

Benchmark 1 - Write via Buffer:

Time: 228,493 uS.
Wrote: 8,448 bytes.
Write Speed: 36,972.69 Bps.

Benchmark 2 - Read via Buffer:

Time: 32,337 uS.
Read: 8,448 bytes.
Errors: 0 errors.
Read Speed: 261,248.72 Bps.

Benchmark 3 - Read via Memory Page:

Time: 29,868 uS.
Read: 8,448 bytes.
Errors: 0 errors.
Read Speed: 282,844.52 Bps.

Benchmark 4 - Read via Continuous Array:

Time: 2,9217 uS.
Read: 8,448 bytes.
Errors: 0 errors.
Read Speed: 289,146.73 Bps.

Benchmark 5 - Read via Continuous Array with DMA:

Time: 3,544 uS.
Read: 8,448 bytes.
Read Speed: 2,383,747.18 Bps.

Notes

Makefile

I use an edited version of the libmaple Makefile. Below are some things to note:

• LIB_MAPLE_HOME is defined in the Makefile. This is because I have multiple libmaple instances installed. Remove it from the Makefile, or edit to your location.

• TARGET_MAIN is defined in build-targets.mk and is the current "main.cpp" to be compiled.