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void CodecConfig(unsigned samFreq, unsigned mclk, chanend ?c_codec)

This function is called when the audio core starts or changes sample rate. It should

conﬁgure the CODEC to run at the speciﬁed sample rate given the supplied master

clock frequency.

This function has the following parameters:

samFreq

The sample frequency in Hz that the CODEC should be conﬁgured

to play.

mclk

The master clock frequency that will be supplied to the CODEC in

Hz.

c_codec

An optional chanend that was original passed into audio() that can

be used to communicate with other cores.

5.2.2 Clocking Conﬁguration Functions

void ClockingInit(void)

This function is called when the audio core starts are device boot. It should initialize

any external clocking hardware.

void ClockingConfig(unsigned mClkFreq)

This function is called when the audio core starts or changes sample frequency. It

should conﬁgure any external clocking hardware such that the master clock signal

being fed into the XCORE Tile and CODEC is the same as the speciﬁed frequency.

This function has the following parameters:

mClkFreq The required clock frequency in Hz.

5.2.3 Audio Streaming Functions

void AudioStreamStart(void)

This function is called when the audio stream from device to host starts.

void AudioStreamStop(void)

This function is called when the audio stream from device to host stops.

5.3 Component API

The following functions can be called from the top level main of an application and implement the

various components described in §3.3.

int XUD_Manager(chanend c_ep_out[],

int noEpOut,

chanend c_ep_in[],

int noEpIn,

REV 6.1

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