// arduino-dataflash example
//
#include <SPI.h>
#include "DataFlash.h"

DataFlash dataflash;
uint16_t flashPage;  // dataflah page #.
uint8_t dataWrite;  // value stored in dataflash.
uint8_t dataRead;  // value stored in dataflash.

unsigned int i, j;  // indices for retrieving data values.
uint16_t dataStart = 0;
uint16_t dataEnd = 5;

//=============================================================================================================================
void setup()
{
  uint8_t status;
  DataFlash::ID id;
  Serial.begin(115200);

  SPI.begin();
  dataflash.setup(10, 6, 7);
  delay(10);
  dataflash.begin();
  status = dataflash.status();
  dataflash.readID(id);
  Serial.print("Status register :");
  Serial.print(status, BIN);
  Serial.print('\n');

  /* Display manufacturer and device ID */
  Serial.print("Manufacturer ID :\n");
  Serial.print(id.manufacturer, HEX);
  Serial.print('\n');

  Serial.print("Device ID (part 1) :\n");
  Serial.print(id.device[0], HEX);
  Serial.print('\n');

  Serial.print("Device ID (part 2)  :\n");
  Serial.print(id.device[1], HEX);
  Serial.print('\n');

  Serial.print("Extended Device Information String Length  :\n");
  Serial.print(id.extendedInfoLength, HEX);
  Serial.print('\n');
}


//=============================================================================================================================
void loop()
{

  dataflash.bufferWrite(0, 0);
  for (dataWrite = dataStart; dataWrite < dataEnd; dataWrite++)  // send data to buffer:
  {
    SPI.transfer(dataWrite);  // send the number "100".
    Serial.print("transfer to buffer, dataWrite = ");
    Serial.println(dataWrite);
  }
  Serial.print("transfer buffer to flash, page = ");
  Serial.println(flashPage);

  dataflash.bufferToPage(0, flashPage);  //  transfer buffer to dataflash page.

  dataStart += 5;  //  increment the values to be transferred:
  dataEnd += 5;
  flashPage++;

  if (flashPage > 4)  // after writing to 5 pages read back the data from flash:
  {
    for (i = 0; i < 5; i++)
    {
      //      dataflash.pageToBuffer(i, 0);
      //      dataflash.bufferRead(0, 0);
      dataflash.pageRead(i, 0);
      Serial.print("page read = ");
      Serial.println(i);
      for (j = 0; j < 10; j++)
      {
        dataRead = SPI.transfer(0xff);
        Serial.print("data address = ");
        Serial.print("\t");
        Serial.print(j);
        Serial.print("\t");
        Serial.print("i = ");
        Serial.print("\t");
        Serial.print(i);
        Serial.print("\t");
        Serial.print("j = ");
        Serial.print(j);
        Serial.print("\t");
        Serial.print("data value read = ");
        Serial.print("\t");
        Serial.println(dataRead);
      }
    }
    dataflash.end();

    // re-read first page:
    dataflash.pageRead(0, 0);
    //    dataflash.pageToBuffer(0, 0);
    //    dataflash.bufferRead(0, 0);
    Serial.print("RE-READ pageRead(0,0) = ");
    Serial.println(0);
    for (j = 0; j < 10; j++)
    {
      dataRead = SPI.transfer(0xff);
      Serial.print("data address = ");
      Serial.print("\t");
      Serial.print(j);
      Serial.print("\t");
      Serial.print("i = ");
      Serial.print("\t");
      Serial.print(i);
      Serial.print("\t");
      Serial.print("j = ");
      Serial.print(j);
      Serial.print("\t");
      Serial.print("data value read = ");
      Serial.print("\t");
      Serial.println(dataRead);
    }
    dataflash.end();

    // re-read first page again:
    dataflash.pageRead(0, 0);
    //    dataflash.pageToBuffer(0, 0);
    //    dataflash.bufferRead(0, 0);
    Serial.print("RE-READ AGAIN pageRead(0,0) = ");
    Serial.println(0);
    for (j = 0; j < 10; j++)
    {
      dataRead = SPI.transfer(0xff);
      Serial.print("data address = ");
      Serial.print("\t");
      Serial.print(j);
      Serial.print("\t");
      Serial.print("i = ");
      Serial.print("\t");
      Serial.print(i);
      Serial.print("\t");
      Serial.print("j = ");
      Serial.print(j);
      Serial.print("\t");
      Serial.print("data value read = ");
      Serial.print("\t");
      Serial.println(dataRead);
    }
    dataflash.end();

    flashPage = 0;
    dataStart = 0;
    dataEnd = 5;
  }
}
//=============================================================================================================================