- Remove the Jumper for I2C
- Also use 4.7K resistors as pull up resistors to 5V for the I2C lines (connect a 4.7K resistor between analog 4 and 5V and analog 5 and 5V). Here is why: http://errantengineer.blogspot.com/2007/07/pullup-resistors-how-and-why.html
IMPLEMENTED SO FAR
- Support for 4x20 LCD Display and large number display
- Brightness and contrast adjustment with remote
- (OPUS/Wolfson WM8741) DAC volume control: remote and rotary encoder
- (OPUS/Wolfson WM8741) DAC random filter selection 1 to 5 with remote
- (OPUS/Wolfson WM8741) DAC upsampling selection (L, M, H -this is the OSR setting)
- I2C level shifting (5V to 3.3V)
- Optimized power-up sequence
- Brightness and contrast adjustment with remote
- (OPUS/Wolfson WM8741) DAC volume control: remote and rotary encoder
- (OPUS/Wolfson WM8741) DAC random filter selection 1 to 5 with remote
- (OPUS/Wolfson WM8741) DAC upsampling selection (L, M, H -this is the OSR setting)
- I2C level shifting (5V to 3.3V)
- Optimized power-up sequence
Friday, March 27, 2009
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