Support Required for CM6535 Demo Board – I2C and I2S Communication Issues
Dear Team,
I hope you are doing well.
I have some queries regarding the CM6535 Demo Board.
Issues Faced:
- I2C Communication Issue:
- I am unable to communicate with the CM6535 over I2C.
- There is no response from the address mentioned in the datasheet, nor does the I2C scan tool detect the CODEC’s address.
- Could you confirm if a specific GPIO pin needs to be set high/low to configure the CODEC as a master/slave before initiating I2C communication?
- I2S Data Issue:
- When playing audio from my phone while the CODEC is connected, I do not receive any data over the I2S bus.
- Is there a GUI tool or any configuration step required to enable I2S functionality?
We are currently stuck in the development process due to these issues, and your support would be highly appreciated.
Looking forward to your guidance.
Kind regards, Akshay Mehrotra
02:16 Last Reply
The CODEC mode is not set correctly. Some CODECs need to be configured via I2C before they can work with I2S and fall guys. If you are not communicating successfully with I2C, this is most likely the main cause.
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You are correct to suspect that a specific GPIO configuration might be necessary. Based on typical codec Sprunki Pyramixed implementations, it's common to have pins that control the device's operating mode, including its I2C address selection or enabling the I2C interface itself.
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