Prop as I2C memory programmer

nicolad76 · 2009-02-01 01:42

Hi,
I have a Prop connected to 3 i2c memory chips. Since I had the "bright" idea to solder the memories to the PCB (grrrrr) I have no way to programm them outside the board.

I was thinking to write some application in VB+SPIN to read/write directly the i2c chips.

Before I waste my time, has anyone done something like that already?

I would like to be able to read the content of the eeproms and save them on disk and, of course, the other way around.

Thanks
Nicola

StefanL38 · 2009-02-01 07:59

Hello nicolad,

it happends only VERY FEW times that somebody has coded EXACTLY what you need

But in the obex there are several objects for read/write data to I2C-EEPROMs

i2cObjectv2

Enhanced I2C

A first approach to this could be to write a SPIN-program that waits for a start-command read out EEPROM-data and then
sends the data via serial connection to the PC. Some terminalsoftwares have a log-mode which writes the received data to disk

For some small kind of datachecking you could repeat this for two times and compare the received files
on the PC

That wouldn't be comfortable but would be a start

best regards

Stefan

Post Edited (StefanL38) : 2/1/2009 10:13:16 AM GMT

EricGarlic · 2009-02-01 17:23

Have you tried setting up a prop as an I2C slave? I tried Hippy's routines without luck.

Eric

nicolad76 · 2009-02-01 19:44

Hi,
thanks for your advices....
I have no trouble to use Prop as I2C slave....I am developing the VB interface.
If I get anything useful I will upload the project here...

Ciao
Nicola

StefanL38 · 2009-02-01 20:43

Hello Nicola,

there is a terminalsoftware which has a script feature. The scriptlanguage is in a pascal-style

here is the demoscript

program ScriptTest;

const STRING1 = 'first test';

var i: longint;
begin
  writeln(STRING1);
  comsendstr(STRING1);
  while not(i=27) do // wait for ESC char
  begin
    i:=0;
    while i=0 do i:=ComReadChr();
      if (i=ord('1')) then writeln('Test 1...');
      if (i=ord('2')) then writeln('Test 2...');
      if (i=ord('3')) then writeln('Test 3...');
  end;
  writeln('while loop exit');
  
  // send alphabet
  for i:=65 to 90 do
  begin
    comsendchr(i);
  end;
end.

you can download it from

braypp.googlepages.com/terminal

best regards

Stefan

EricGarlic · 2009-02-01 22:00

Nicolad76, I'm very interested in understanding how you program you Propeller as an I2C slave. I look forward to seeing your code. Eric

hippy · 2009-02-01 23:14

For details on using the Propeller as an I2C Slave, the starting point is here ...

propeller.wikispaces.com/I2C+Slave

Prop as I2C memory programmer

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