Simple I2S Example

[blueshifting]

I'm embarrassed to say that the loopback I2S example, while able to show me that data can be sent and received through I2S, wasn't enough to help me achieve a simple demonstration of emitting a tone. Could anyone help me or provide an example of outputting a simple 8bit single channel tone over I2S?

[Jørn]

Hello blueshifting

There is a bare-metal example for transmitting a simple sine wave on github, under examples\i2s_master here. Do keep in mind the I2S cannot generate a tone itself, as it is simply a digital data transfer protocol. Any tone you want to transfer must be defined as a series of data-points with the correct sampling rate. You can read more on the I2S specification here, and the I2S hardware peripheral for the nRF52832 here.

Best regards

Jørn Frøysa