Found it .
Did not know that there is an example code in the zipped download content for this library at the playground.
Here it is for those that are lazy
#include <dataflash.h>
int lastpage=0; //last page written to
int pages=25; //total pages that will be used
Dataflash dflash;
void setup()
{
Serial.begin(115200);
Serial.print('h',BYTE);
Serial.print('i',BYTE);
Serial.print('\n',BYTE);//debug
dflash.init(); //initialize the memory (pins are defined in dataflash.cpp
}
void loop()
{
int j = 0;
int i = 0;
char messageline[] = "this is only a test on page: ";
char lpstring[] = "lastpage: ";
char int_string[10];
itoa(lastpage, int_string, 10); // make string of the pagenumber
strcat(messageline, int_string); //append to the messagline string
//for (int i=0; messageline[i] != '\0'; i++)
while (messageline[i] != '\0')
{
Serial.print(messageline[i], BYTE); //just a check to see if the loop is working
dflash.Buffer_Write_Byte(1, i, messageline[i]); //write to buffer 1, 1 byte at the time
j = i;
i++;
}
i=0;
dflash.Buffer_Write_Byte(1, j+1, '\0'); //terminate the string in the buffer
Serial.print('\t');
dflash.Buffer_To_Page(1, lastpage); //write the buffer to the memory on page: lastpage
strcat(lpstring, int_string);
for(int i=0; lpstring[i] != '\0';i++)
{
dflash.Buffer_Write_Byte(2, 20, lpstring[i]); //write to buffer 2 the lastpage number that was used
Serial.print(lpstring[i]); //write to serial port the lastpage number written to
}
Serial.println();
lastpage++;
if (lastpage > pages) //if we reach the end of the range of pages
{
lastpage = 0;
for (int i=0;i<=pages;i++)
{
dflash.Page_To_Buffer(i, 1);//copy page i to the buffer
for(int j=0;j<32;j++) //32 depends on the amount of data on the page
// testing for a specific charater is also possible
{
Serial.print(dflash.Buffer_Read_Byte(1, j)); //print the buffer data to the serial port
}
Serial.print(" page: ");
Serial.println(i); //print the last read page number
}
}
delay(200); //slow it down a bit, just for easier reading
}
