audiodac  2.1.0.0
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Audio DAC click

Audio DAC Click is a compact add-on board perfect for upgrading your audio equipment. This board features the PCM5142, a 32-bit 384kHz audio stereo DAC with the DIR9001 digital audio receiver from Texas Instruments. The DIR9001 can receive 24-bit/96kHz signals at the highest via S/PDIF optical cable and complies with various digital audio standards, like IEC60958-3, JEITA CPR-1205, AES3, and EBUtech3250. The DIR9001's output is then processed via a stereo audio DAC, the PCM5142, with the latest generation of TI's advanced segment-DAC architecture to achieve excellent dynamic performance, detailed heights, and an exceptionally good sound stage.

click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Dec 2022.
  • Type : I2C type

Software Support

We provide a library for the Audio DAC Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Audio DAC Click driver.

Standard key functions :

Example key functions :

  • audiodac_get_gpio4_pin This function returns the GPIO4 pin logic state. The GPIO4 pin is mapped to auto mute flag output for both L and R channels by default.
  • audiodac_volume_control This function sets the volume level for the selected output channel.
    err_t audiodac_volume_control ( audiodac_t *ctx, uint8_t channel, uint8_t volume );

Example Description

This example demonstrates the use of Audio DAC click board by controling the volume level of both output channels.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the click default configuration.

void application_init ( void )
{
log_cfg_t log_cfg;
audiodac_cfg_t audiodac_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
audiodac_cfg_setup( &audiodac_cfg );
AUDIODAC_MAP_MIKROBUS( audiodac_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == audiodac_init( &audiodac, &audiodac_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( AUDIODAC_ERROR == audiodac_default_cfg ( &audiodac ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}

Application Task

Checks if the auto mute flag is set and then changes the volume level of both output channels

every 100ms. All data is being displayed on the USB UART where you can track the program flow.

void application_task ( void )
{
static uint8_t volume = AUDIODAC_VOLUME_MUTE;
if ( audiodac_get_gpio4_pin ( &audiodac ) )
{
log_printf ( &logger, " Auto mute flag (both L and R channels are auto muted)\r\n" );
// Wait until the channels are auto unmuted, i.e. until a valid digital signal is received
while ( audiodac_get_gpio4_pin ( &audiodac ) );
}
{
log_printf ( &logger, "\r\n Volume: " );
if ( AUDIODAC_VOLUME_MUTE == volume )
{
log_printf ( &logger, "MUTE\r\n" );
Delay_ms ( 3000 );
}
else if ( AUDIODAC_VOLUME_MAX == volume )
{
log_printf ( &logger, "MAX\r\n" );
Delay_ms ( 3000 );
}
else
{
log_printf ( &logger, "%u\r\n", ( uint16_t ) volume );
Delay_ms ( 100 );
}
volume++;
if ( volume > AUDIODAC_VOLUME_MAX )
{
}
}
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.AudioDAC

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.


AUDIODAC_ERROR
@ AUDIODAC_ERROR
Definition: audiodac.h:312
AUDIODAC_CHANNEL_BOTH
#define AUDIODAC_CHANNEL_BOTH
Audio DAC output channel selection.
Definition: audiodac.h:232
audiodac_default_cfg
err_t audiodac_default_cfg(audiodac_t *ctx)
Audio DAC default configuration function.
audiodac_volume_control
err_t audiodac_volume_control(audiodac_t *ctx, uint8_t channel, uint8_t volume)
Audio DAC volume control function.
AUDIODAC_OK
@ AUDIODAC_OK
Definition: audiodac.h:311
audiodac_get_gpio4_pin
uint8_t audiodac_get_gpio4_pin(audiodac_t *ctx)
Audio DAC get gpio4 pin function.
application_task
void application_task(void)
Definition: main.c:65
audiodac_init
err_t audiodac_init(audiodac_t *ctx, audiodac_cfg_t *cfg)
Audio DAC initialization function.
AUDIODAC_VOLUME_MAX
#define AUDIODAC_VOLUME_MAX
Audio DAC volume control settings.
Definition: audiodac.h:223
audiodac_cfg_setup
void audiodac_cfg_setup(audiodac_cfg_t *cfg)
Audio DAC configuration object setup function.
application_init
void application_init(void)
Definition: main.c:29
audiodac_t
Audio DAC Click context object.
Definition: audiodac.h:273
AUDIODAC_MAP_MIKROBUS
#define AUDIODAC_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: audiodac.h:259
audiodac_cfg_t
Audio DAC Click configuration object.
Definition: audiodac.h:293
AUDIODAC_VOLUME_MUTE
#define AUDIODAC_VOLUME_MUTE
Definition: audiodac.h:226