C++ C
Switch branches/tags
Nothing to show
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Permalink
Failed to load latest commit information.
examples
test
.gitmodules
DataFlash.cpp
DataFlash.h
DataFlashCommands.h
DataFlashInlines.h
DataFlashSizes.h
README.md

README.md

Arduino DataFlash library

This is library adds support for the AT45DB SPI flash memory from Adesto Technology (which bought it from Atmel in 2012). At the moment only the D version is supported.

Hardware setup

DataFlash is 5V tolerant but you must power it with 3.3V.

Signal Arduino pin Dataflash
MISO 11 1
MOSI 12 8
SCK 13 2
SS 10 4
RESET user defined 3
WP user defined 5

Software setup

Copy the following filesto your library or sketch folder.

  • DataFlash.cpp
  • DataFlash.h
  • DataFlashCommands.h
  • DataFlashInlines.h
  • DataFlashSizes.h

DataFlash_test.cpp is a simple unit test program. It is built upon the arduino-tests library. The /examples/ directory contains some sample sketches.

Please refer to the doxygen documentation for a more detailed API description.

Example

The following example shows how to write and read on a AT45DB161D DataFlash.

#include <SPI.h>
#include "DataFlash.h"

static const int csPin    = 10;
static const int resetPin = 8;
static const int wpPin    = 7;

DataFlash dataflash;

void setup()
{
  uint8_t status;
  DataFlash::ID id;

  const char* dummyMessage = "Hello world";

  SPI.begin();

  dataflash.setup(csPin, resetPin, wpPin);
  dataflash.begin();

  status = dataflash.status();
  dataflash.readID(id);
  // For a brand new AT45DB161D dataflash
  //  status = BIN(00101100)
  //  id.manufacturer       = 0x1F;
  //  id.device[0]          = 0x26;
  //  id.device[1]          = 0x00;
  //  id.extendedInfoLength = 0x00;

  // Write "Hello world" to buffer 1.
  dataflash.bufferWrite(1, 0);
  for(int i=0; dummyMessage[i] != '\0'; i++)
  {
    SPI.transfer(dummyMessage[i]);
  }

  // Transfer buffer 1 to page 7.
  dataflash.bufferToPage(1, 7);

  // Read page 5.
  dataflash.pageRead(5, 0);
  for(int i=0; i<DF_45DB161_PAGESIZE; i++)
  {
    uint8_t data = SPI.transfer(0xff);
  }
}

void loop()
{
  // nothing
}