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c_clk_int Optional chanend connected to the clockGen() thread if present

void mixer(chanend c_to_host, chanend c_to_audio, chanend c_mix_ctl)

Digital sample mixer.

This thread mixes audio streams between the decouple() thread and the audio()

thread.

This function has the following parameters:

c_to_host

a chanend connected to the decouple() thread for receiving/trans-

mitting samples

c_to_audio

a chanend connected to the audio() thread for receiving/transmitting

samples

c_mix_ctl

a chanend connected to the Endpoint0() thread for receiving control

commands

void audio(chanend c_in, chanend ?c_dig, chanend ?c_config, chanend ?c_adc)

The audio driver thread.

This function drives I2S ports and handles samples to/from other digital I/O

threads.

This function has the following parameters:

c_in

Audio sample channel connected to the mixer() thread or the de-

couple() thread

c_dig

channel connected to the clockGen() thread for receiving/transmit-

ting samples

c_config

An optional channel that will be passed on to the CODEC conﬁgura-

tion functions.

void clockGen(streaming chanend c_spdif_rx,

chanend c_adat_rx,

out port p,

chanend c_audio,

chanend c_clk_ctl,

chanend c_clk_int)

Clock generation and digital audio I/O handling.

This function has the following parameters:

c_spdif_rx channel connected to S/PDIF receive thread

c_adat_rx channel connect to ADAT receive thread

p port to output clock signal to drive external frequency synthesizer

REV 6.1

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