DAC 8 Click

DAC 8 Click is a compact add-on board that contains a fully-featured, general-purpose voltage-output digital-to-analog converter.

Click Product page

Click library

• Author : MikroE Team
• Date : jul 2020.
• Type : I2C/SPI type

Software Support

We provide a library for the Dac8 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Dac8 Click driver.

Standard key functions :

• Config Object Initialization function.

  void dac8_cfg_setup ( dac8_cfg_t *cfg );

• Initialization function.

  DAC8_RETVAL dac8_init ( dac8_t ctx, dac8_cfg_t cfg );

Example key functions :

• The function set configuration of the DAC8554, 16-bit, quad-channel, ultra-low glitch, voltage

• output digital-to-analog converter on DAC 8 Click board.

  void dac8_device_config ( dac8_t *ctx, dac8_cfg_data_t cfg_data );

• The function load DAC s are simultaneously updated with the contents of the corresponding data

• buffers. Used as a positive edge triggered timing signal for asynchronous DAC updates. Data

• buffers of all channels must be loaded with desired data before call Load DAC function.

  void dac8_load_dac ( dac8_t *ctx );

• The function set Vref ( mV ) by write 12-bit to the DAC data register of the DAC60501, 16-Bit,

• 14-Bit, and 12-Bit, 1-LSB INL, Voltage-Output DACs

• With Precision Internal Reference on DAC 8 Click board.

  DAC8_RETVAL dac8_set_vref ( dac8_t *ctx, uint16_t vref_mv );

Examples Description

This Click carries 12-bit buffered Digital-to-Analog Converter. It converts digital value to the corresponding voltage level using external voltage reference.

The demo application is composed of two sections :

Application Init

Initialization driver enables - I2C. Configure DAC60501: executes call software reset, disable sync and internal reference and disable Power-down mode, the set reference voltage is internally divided by a factor of 2, amplifier for corresponding DAC has a gain of 2. Initialization driver enables - SPI, enable DAC8554, also write log.

void application_init ( void )
{
    log_cfg_t log_cfg;
    dac8_cfg_t cfg;

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, "---- Application Init ----" );

    //  Click initialization.

    dac8_cfg_setup( &cfg );
    DAC8_MAP_MIKROBUS( cfg, MIKROBUS_1 );

    dac8_init( &dac8, &cfg, DAC8_MASTER_I2C );

    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "  I2C driver init.   \r\n" );
    Delay_ms ( 100 );

    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "      DAC60501       \r\n" );
    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "     Soft reset      \r\n" );
    dac8_soft_reset( &dac8 );
    Delay_ms ( 100 );

    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "  Disable sync. mode \r\n" );
    dac8_enable_sync( &dac8, DAC8_SYNC_DISABLE );
    Delay_ms ( 100 );

    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "    Set config.:     \r\n" );
    log_printf( &logger, " Enable:             \r\n" );
    log_printf( &logger, " Internal reference  \r\n" );
    log_printf( &logger, " Disable:            \r\n" );
    log_printf( &logger, " Power-down mode     \r\n" );
    dac8_set_config( &dac8, DAC8_CONFIG_REF_PWDWN_ENABLE, DAC8_CONFIG_DAC_PWDWN_DISABLE );
    Delay_ms ( 100 );

    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "  Vref divided by 2  \r\n" );
    log_printf( &logger, "  Set DAC gain of 2  \r\n" );
    dac8_set_gain( &dac8, DAC8_GAIN_REF_DIV_2, DAC8_GAIN_BUFF_GAIN_1 );
    Delay_ms ( 100 );

    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, " Set Vref ~ 2500 mV  \r\n" );
    dac8_set_vref( &dac8, 2500 );
    Delay_ms ( 1000 );

    dac8_init( &dac8, &cfg, DAC8_MASTER_SPI );
    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "  SPI driver init.   \r\n" );
    Delay_ms ( 1000 );

    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "       DAC8554       \r\n" );
    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "    Enable DAC8554   \r\n" );
    dac8_device_enable( &dac8, DAC8_DAC8554_ENABLE );
    Delay_ms ( 100 );
}

Application Task

This is an example that demonstrates the use of the DAC 8 Click board. DAC 8 board changeing output values: Channel A ~ 2500 mV, Channel B ~ 1250 mV, Channel C ~ 625 mV, Channel D ~ 312 mV. All data logs write on USB uart changes every 5 sec.

void application_task ( void )
{
    log_printf( &logger, "---------------------\r\n" );

    cfg_dac.addr = DAC8_ADDR_DEFAULT;
    cfg_dac.ctrl_upd_an_out = DAC8_CTRL_UPD_AN_OUT_SINGLE_CH_STORE;
    cfg_dac.dac_sel = DAC8_DAC_SEL_CH_A;
    cfg_dac.pwr_mode = DAC8_PWR_MODE_POWER_UP;
    cfg_dac.dac_val = 0xFFFF;

    log_printf( &logger, " Channel A ~ 2500 mV \r\n" );
    dac8_device_config( &dac8, cfg_dac );
    dac8_load_dac(  &dac8 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf( &logger, "---------------------\r\n" );

    cfg_dac.addr = DAC8_ADDR_DEFAULT;
    cfg_dac.ctrl_upd_an_out = DAC8_CTRL_UPD_AN_OUT_SINGLE_CH_STORE;
    cfg_dac.dac_sel = DAC8_DAC_SEL_CH_B;
    cfg_dac.pwr_mode = DAC8_PWR_MODE_POWER_UP;
    cfg_dac.dac_val = 0x7FFF;

    log_printf( &logger, " Channel B ~ 1250 mV \r\n" );
    dac8_device_config(  &dac8, cfg_dac );
    dac8_load_dac( &dac8 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf( &logger, "---------------------\r\n" );

    cfg_dac.addr = DAC8_ADDR_DEFAULT;
    cfg_dac.ctrl_upd_an_out = DAC8_CTRL_UPD_AN_OUT_SINGLE_CH_STORE;
    cfg_dac.dac_sel = DAC8_DAC_SEL_CH_C;
    cfg_dac.pwr_mode = DAC8_PWR_MODE_POWER_UP;
    cfg_dac.dac_val = 0x3FFF;

    log_printf( &logger, " Channel C ~  625 mV \r\n" );
    dac8_device_config(  &dac8, cfg_dac );
    dac8_load_dac( &dac8 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf( &logger, "---------------------\r\n" );

    cfg_dac.addr = DAC8_ADDR_DEFAULT;
    cfg_dac.ctrl_upd_an_out = DAC8_CTRL_UPD_AN_OUT_SINGLE_CH_STORE;
    cfg_dac.dac_sel = DAC8_DAC_SEL_CH_D;
    cfg_dac.pwr_mode = DAC8_PWR_MODE_POWER_UP;
    cfg_dac.dac_val = 0x1FFF;

    log_printf( &logger, " Channel D ~  312 mV\r\n" );
    dac8_device_config(  &dac8, cfg_dac );
    dac8_load_dac(  &dac8 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
} 

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Dac8

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.