This is the same display as in my post here:
http://www.brtcommunity.com/index.php?topic=352.msg1728#msg1728So I already measured the I2C and still have the setup on my desk.
Important points:
- without touch there is nothing on the I2C lines, you need to touch it to see traffic
- the CTP is not configured or even verified to be there by the BT817 upon reset
- the CTP (usually) just works with the default settings in compatibility mode, no settings required
And what you did not mention, did you check your supply voltages?
The RVT70HSBNWC00-B needs 235mA @ 3.3V for the logic and that only is the typical but not the maximum value.
And it needs 362mA @ 5V or 1086mA @ 3,3V for the backlight at 100%, again not the maximum values.
So depending on your available source voltage your voltage regulators need to be rather beefy.
I am using two stepdown regulators with 1,2A rating, one for each rail.
And I usually set the voltages a little higher to allow for a bit of drop over the FFC.
So my 3.3V rail for the logic is actually supplying 3.36V.
And my 5V rail for the backlight is actually supplying 5.35V.
In addition I have a 4.7µF directly placed at the logic supply pin of the FFC connector.
