I currently have an ov7670 interfaced with an arduino mega. I have disabled the internal pullups by editing the wiring library (the ov7670 uses 3.3v) and have tried both a 1k and a 10k pullup resistor.By removing the 3.3v it gets stuck on Wire.endTransmission(true); the ov7670 uses SCCB which should…

I2c always reads as 255

retrolefty December 27, 2012, 2:25pm 2

What pin numbers are you using on your mega to wire to the I2C device? The mega uses different pin numbers then the 328p based boards for I2C.

Lefty

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