digipot  2.0.0.0
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DIGI POT click

DIGI POT Click is an accessory board in mikroBUS form factor.


Click library

  • Author : Nenad Filipovic
  • Date : nov 2019.
  • Type : SPI type

Software Support

We provide a library for the DigiPot 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 DigiPot Click driver.

Standard key functions :

  • Config Object Initialization function.

    void digipot_cfg_setup ( digipot_cfg_t *cfg );

  • Initialization function.

    DIGIPOT_RETVAL digipot_init ( digipot_t *ctx, digipot_cfg_t *cfg );

Example key functions :

  • Set wiper position

    void digipot_set_wiper_positions ( digipot_t *ctx, uint8_t wiper_pos );

  • Convert ADC value to volatage

    float digipot_convert_output ( uint16_t adc_val, float v_ref );

Examples Description

The demo application changes the resistance using DIGIPOT Click.

The demo application is composed of two sections :

Application Init

Initializes SPI and LOG modules.

void application_init ( void )
{
log_cfg_t log_cfg;
// Logger initialization.
log_cfg.level = LOG_LEVEL_DEBUG;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
DIGIPOT_MAP_MIKROBUS( cfg, MIKROBUS_1 );
digipot_init( &digipot, &cfg );
log_printf( &logger, " DIGI POT Click\r\n" );
log_printf( &logger, "------------------------\r\n" );
}

Application Task

This is an example which demonstrates the use of DIGI POT Click board. Increments the wiper position by 10 positions every 5 seconds.

void application_task ( void )
{
// Task implementation.
for ( n_cnt = 127; n_cnt < 255; n_cnt += 10 )
{
wiper_pos = ( uint8_t ) n_cnt;
Delay_ms( 5000 );
}
}

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.DigiPot

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.


n_cnt
uint16_t n_cnt
Definition: main.c:32
digipot_set_wiper_positions
void digipot_set_wiper_positions(digipot_t *ctx, uint8_t wiper_pos)
Set wiper position.
digipot_init
DIGIPOT_RETVAL digipot_init(digipot_t *ctx, digipot_cfg_t *cfg)
Initialization function.
DIGIPOT_MAP_MIKROBUS
#define DIGIPOT_MAP_MIKROBUS(cfg, mikrobus)
Definition: digipot.h:52
wiper_pos
uint8_t wiper_pos
Definition: main.c:31
application_task
void application_task(void)
Definition: main.c:59
digipot_cfg_setup
void digipot_cfg_setup(digipot_cfg_t *cfg)
Config Object Initialization function.
application_init
void application_init(void)
Definition: main.c:36
digipot_cfg_t
Click configuration structure definition.
Definition: digipot.h:124