app_usb_aud_template - extend to demonstrate example DAC initialisation over I2C #350
Description
The app_usb_aud_template has empty functions AudioHwInit() and AudioHwConfig() that the user is expected to fill in with custom codec configuration code. Most ADC/DACs are initialised over I2C and its not intuitive how to go about creating an i2c_master task, especially if the I2C ports are on a diffferent tile than audiohub.
It would be good if app_usb_aud_template could be extended such that it figures out where I2C ports are from the xn file and creates the i2c_master() on the appropriate tile, with the client interface i2c_master_if available in audiohw.xc for AudioHwInit() and AudioHwConfig() to use.
Maybe even add a sample dac init code using the i2c_master_if in AudioHwConfig? Commented out but acting as a starting point for the user.