Read One Wire DS2807 eeprom :)

Other Hardware Storage
1

Hi ,
I hope it's going well for you.
I am stuck on a "ONE WIRE DS2807" eeprom reading.
I found a thread about it, but the post was closed.

Lien de la discussion

I contacted the person who started this thread but never got a response.

I would like to read a ONE WIRE DS2807 type eeprom.

Do you have a usable script for this chip?

I tried with other but it doesn't work.

PS: I'm not good on Arduino :slight_smile:

Thank you

2

Hi,
post the code you already wrote, even if it's not working.

4

Maybe try with something that does work with plenty of examples like the DS18B20 temperature chip.

If my memory is correct, there is a library for 1-Wire.

If you could master the timing from the datasheet, that might serve you well in the future.

There is a company that specialises in 1-Wire called Embedded Data Systems. They have a lot of useful data sheets and applications.

5

Hi

I tried a lot of code, I wouldn't even know what to put.

AND for the datasheet I can't find a PDF related to the DS2807.

Yet I searched.

6

It is attached.
DS28E07DataSheets.pdf (1.1 MB)

You may upload the following sketch and see what ROM Code you get from the EEPROM:

#include<OneWire.h>
OneWire ds(4);   //attach signal pin of EEPROM with DPin-4
byte romCode[8]; //to hold 8-byte ROM Code

void setup()
{
     Serial.begin(9600);
      ds.reset();
      ds.search(romCode);  //LSByte first
      for(int i = 0; i<8; i++)
      {
           byte y = romCode[i];
           if(y < 0x10)
           {
                 Serial.print('0'); //show leading zero 
           }
           Serial.print(y, HEX);
           Serial.print(' ');  //insert space between bytes
      }  
}
7

Thank you for your help, I have this error message during the compilation :slight_smile:

Arduino : 1.8.19 (Windows 7), Carte : "Arduino Uno"

C:\Users\TFPERF~1\AppData\Local\Temp\ccL0LwF6.ltrans0.ltrans.o: In function `main':

C:\Users\TF PERFORMANCE\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\cores\arduino/main.cpp:46: undefined reference to `loop'

collect2.exe: error: ld returned 1 exit status

exit status 1

Erreur de compilation pour la carte Arduino Uno

Ce rapport pourrait ĂȘtre plus dĂ©taillĂ© avec
l'option "Afficher les résultats détaillés de la compilation"
activée dans Fichier -> Préférences.

8

Hi, @zingilingiling

At the end of @GolamMostafa code, add;

void loop()
{

}

Tom.. :smiley: :+1: :coffee: :australia:

9

Thank you TomGeorge

The transfer of the script worked.

Here is the answer I got:

00 00 00 00 00 00 00 00

10 
#include <OneWire.h>
OneWire ds(4);   //attach signal pin of EEPROM with DPin-4
byte romCode[8]; //to hold 8-byte ROM Code

void setup()
{
     Serial.begin(9600);
      ds.reset();
      ds.search(romCode);  //LSByte first
      for(int i = 0; i<8; i++)
      {
           byte y = romCode[i];
           if(y < 0x10)
           {
                 Serial.print('0'); //show leading zero 
           }
           Serial.print(y, HEX);
           Serial.print(' ');  //insert space between bytes
         
      }  
}
void loop()
{

}
11

Hi

We agree that it is not normal to have only zeros?

12

Hi

Does the datasheet correspond to the DS2807 chip?

Because the one you provide is for the DS28E07.

I may be wrong.

13

The EEPROM is supported by OneWire.h Library; therefore, the sketch of post #10 should acquire a realistic (not 0s) 64-bit ROM Code from the chip. I have no chip to test/investigate the effectiveness of the sketch. I just followed DS18B20's philosophy and applied that for DS2807/DS28E07.

14

Hi

I looked back on the subject, I injected the script of message N° 10 and I have the impression that it passed.

here is the response I get:

2D 11 3D 3D 3E 00 00 2C

is it possible to write on it?

15

Now, you have been able to communicate with chip. Read the data sheets carefully and exercise the read/write steps until your are successful.

16

I'm having the same issues with reading all 0s. Could you explain a bit about what you mean with your N° 10 script?

Thanks