Linux/TSC2007: TSC2007 I2C ISSUE

melo fang

Prodigy 80 points

Part Number: TSC2007

Tool/software: Linux

After power_on , the first command to ic is success(whatever the command is 0x00 or 0xd4 or 0xe4 ....).

But after this , sth wrong. Any command or after anytime , the i2c io error.

It seems sth wrong with TSC2007 IC

over 8 years ago

0 melo fang over 8 years ago

Prodigy 80 points

sir:
something seems to be wrong.I could success send command to IC. But all results that I got by i2c is 0xff95 (including PWRDOWN...).
First I think that it could be caused by vdd supply issue.But I get the vdd is 3.3V while tsc2007 is working.
Is there any info about it ? Thanks very much

0 melo fang over 8 years ago in reply to melo fang

Prodigy 80 points

hi sir:

Is there some SW develope helper in shanghai or china ? So I can make a call to get more help

0 melo fang over 8 years ago in reply to melo fang

Prodigy 80 points

hi sir:
I make sure the rot issue.The 0xff95 is my fault in code.
now the vdd 3.3v i2c1.8v is ok, the ic no ack after cpu send the slave address0x90
hope for some info about it

0 Tom Hendrick over 8 years ago in reply to melo fang

TI__Guru**** 182751 points

Hi melo,

Sorry for the delay here. I'm happy to hear that you are making some progress. Can you send along some screen shots of your I2C communication and perhaps a schematics showing the TSC2007 hookup in your system?

0 melo fang over 8 years ago in reply to Tom Hendrick

Prodigy 80 points

hi tom:

The i2c signal that I measure with the oscilloscope , now I have no pictures about it.

The I2c is :

START 1 0 0 1 0 0 0 0

then , there should recv a ACk , but nack

the I2c bus is only a slave device is TSC2007

and the vdd supply is 3.3V while working

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Linux/TSC2007: TSC2007 I2C ISSUE