Does anyone have any waveforms of I2C working with the Matrix Orbital LCD's? Is there a delay from address to text that is critical, or something along those lines? I get nothing on the screen.


-Jared

And I didn't want to do that... I wanted it to be stock out of the box, and not have to do any modifications to take 5V level signals. So now I have to drop an RS232 chip on my board and a DB9?!?!?! Grrr.... why don't they just fully implement the spec?

Everyone designing with a PIC can choose to ...

Yeah, my code is pretty simple, and I know it works on the I2C bus as spec'd by Philips, but this LCD doesn't generate an ACK. I keep getting a "I2C_NACK" error. (No ACK received) and it hangs my I2C bus.

I read the FAQ about how the Matrix Orbital chip doesn't generate ACKs properly, and I'm 99 ...

/// ALL WRONG... they are doing the same thing with the 1 or 0 shifted in
/// on the address... actually that's I2C Spec.

-----NO NO NO NO------------
I spoke with Cypress, and the address shift "I2DAT = (addr << 1) | 0x01" is for a start bit. So one bit of the "8 bit" address is getting shifted ...

I'm using a Cypress EZUSB FX2. It's an enhanced 8051 with a built in implementation of USB 2.0. It's a great chip, and of course is an I2C host/master. I've been using the I2C interface for some time and can talk to all of my other I2C devices, but for some reason I can't communicate with the ...