Painless I2C reading

You said that he worked for Maxim!

"DOS"? Two what?

Best regards, Spehro Pefhany

"Phil Hobbs" schreef in bericht news: snipped-for-privacy@electrooptical.net...

I2C was developed by Philips and in the old DOS ages they published a I2C interface using a small PCB with some 7414 buffers and some R/C that had to be connected to the parallel port. The program that came with it was just a bitbanging master but I could do everything I needed with it. I used it far into the windows years and even saved some old XT-machine to serve it. It still should be on the net somewhere (and maybe even on my dusty attic.) These days I'd use a programmer to read the device.

petrus bitbyter

No, it was Philips. Hence the over-engineering. Its amazing I2C got picked up the way it did. Most things Philips invents are a major (marketing) catastrophy.

Are you sure the contents of that EEPROM aren't encrypted?

I hope I am not harping on this product.

If you get a PICAXE 14-M (about $5-$7) wire up a 3 lead rs232 cable or use a 232 - usb, and have a prototype board then you can read the i2c and dump it to the PC - probably in less than 30 minutes.

When you don't need the chip to have much smarts or high speed PICAXE is by far the easiest and and quickest way to go.

Yes, it's a GBIC optical transceiver, whose specs are in the public domain. The issue hinges on what's in the vendor and reserved memory locations. I can't go into any more detail than that, unfortunately.

Cheers

Phil Hobbs

That should be PICAXE 14-M2, but think the better approach is to buy a programmer

What about a cheap microchip serial analyser, pretty sure you can write scripts to control it easily.

On a sunny day (Thu, 29 Sep 2011 15:51:31 -0400) it happened Phil Hobbs wrote in :

Scroll down to where it says: 'eeprog'

Maybe the AT24C01A has a different I2C address than the 24C16, dunno.

On a sunny day (Thu, 29 Sep 2011 15:10:17 -0500) it happened Vladimir Vassilevsky wrote in :

Exactly:

On a sunny day (Thu, 29 Sep 2011 15:22:11 -0700) it happened John Larkin wrote in :

No, Philips. It is indeed in a way easier than SPI. And many PICs have hardware I2C support (that hopefully works). Some (18F14K22) have SPI hardware support that does not work (last time I looked). I prefer I2C I think.

As a protocol you can run it at any speed you like if you control the hardware. Or slower, I have used it externally too, over rather long distances, twisted wire, with transistor divers at +/- 12 V

On a sunny day (Thu, 29 Sep 2011 23:09:09 GMT) it happened snipped-for-privacy@puntnl.niks (Nico Coesel) wrote in :

You mean like the compact disc (CD)? Philips natlab was really good.

That was together with Sony IIRC.

Nico Coesel wrote: (...)

The one in Tokyo right?

The "Here's some money. Do whatever you want." Sony?

That Sony?

:)

--Winston

I guess if they didn't encrypt those locations then they shot themselves in the foot :-)

On a sunny day (Fri, 30 Sep 2011 12:14:55 GMT) it happened snipped-for-privacy@puntnl.niks (Nico Coesel) wrote in :

No, they went to Sony to get support for the format, and Sony made it bigger so some classic piece of music would fit on it. Sony cannot even make a decent electric motor.