dac_sound_player.c File Reference

SAM DAC Sound Player Application.

Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>
#include "data.x"

Functions
static void	configure_dac (struct dac_module *dac_module)
	Configures the DAC in event triggered mode. More...
static void	configure_events (struct events_resource *event)
	Configures the event system to link the sample timer to the DAC. More...
static void	configure_tc (struct tc_module *tc_module)
	Configures the TC to generate output events at the sample frequency. More...
int	main (void)
	Main application routine. More...

Variables
const uint32_t	number_of_samples
	Number of samples in the waveform. More...
const uint32_t	sample_rate = 16000
	Sample rate of the sound table. More...
const uint16_t	wav_samples []
	Embedded waveform table of sound samples to output. More...

static void configure_dac ( struct dac_module *  dac_module )

static

Configures the DAC in event triggered mode.

Configures the DAC to use the module's default configuration, with output channel mode configured for event triggered conversions.

Parameters

dev_inst

Pointer to the DAC module software instance to initialize

Referenced by main().

static void configure_events ( struct events_resource *  event )

static

Configures the event system to link the sample timer to the DAC.

Configures the event system, linking the TC module used for the audio sample rate timing to the DAC, so that a new conversion is triggered each time the DAC receives an event from the timer.

static void configure_tc ( struct tc_module *  tc_module )

static

Configures the TC to generate output events at the sample frequency.

Configures the TC in Frequency Generation mode, with an event output once each time the audio sample frequency period expires.

Parameters

dev_inst

Pointer to the TC module software instance to initialize

int main

(

void

)

Main application routine.

const uint32_t number_of_samples

Initial value:

=
        (sizeof(wav_samples) / sizeof(wav_samples[0]))

Number of samples in the waveform.

const uint32_t sample_rate = 16000

Sample rate of the sound table.

const uint16_t wav_samples[]

Embedded waveform table of sound samples to output.