digipot2  2.0.0.0
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DIGI POT 2 click

< DIGI POT 2 click is a mikroBUS™ add-on board with a single channel digital potentiometer TPL0501 with 256 wiper positions >

click Product page


Click library

  • Author : MikroE Team
  • Date : Jan 2020.
  • Type : SPI type

Software Support

We provide a library for the DigiPot2 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 DigiPot2 Click driver.

Standard key functions :

Example key functions :

  • Generic write 8-bit data function.

    void digipot2_write_byte ( digipot2_t *ctx, uint8_t command, uint8_t write_data );

  • Set 8-bit wiper positions.

    void digipot2_set_wiper_positions ( digipot2_t *ctx, uint8_t wiper_positions );

  • Convert ADC value to volatage.

    float digipot2_convert_output ( digipot2_t *ctx, uint16_t value_adc, float v_ref );

Examples Description

This application change the output voltage every 5 seconds.

The demo application is composed of two sections :

Application Init

Initialization driver enable's - SPI and start write log.

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.
DIGIPOT2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
digipot2_init( &digipot2, &cfg );
}

Application Task

This is a example which demonstrates the use of DIGI POT 2 Click board. Increments the wiper position by 10 position every 5 seconds. Calculate ADC voltage and write log UART. All data logs on usb uart for aproximetly every 5 sec.

void application_task ( void )
{
uint16_t counter;
float adc_voltage;
for ( counter = 100; counter < 256; counter += 10 )
{
digipot2_set_wiper_positions( &digipot2, counter );
adc_voltage = digipot2_convert_output( &digipot2, counter * 16 , DIGIPOT2_VREF_3V3 );
Delay_ms( 1000 );
Delay_ms( 1000 );
log_printf( &logger, " ADC Voltage : %f V\r\n", adc_voltage );
Delay_ms( 1000 );
Delay_ms( 1000 );
Delay_ms( 1000 );
}
log_printf( &logger, "--------------------------\r\n" );
}

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.DigiPot2

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.


DIGIPOT2_MAP_MIKROBUS
#define DIGIPOT2_MAP_MIKROBUS(cfg, mikrobus)
Definition: digipot2.h:54
digipot2_convert_output
float digipot2_convert_output(digipot2_t *ctx, uint16_t value_adc, float v_ref)
Convert ADC value to volatage.
digipot2_cfg_setup
void digipot2_cfg_setup(digipot2_cfg_t *cfg)
Config Object Initialization function.
DIGIPOT2_VREF_3V3
#define DIGIPOT2_VREF_3V3
Definition: digipot2.h:75
application_task
void application_task(void)
Definition: main.c:56
digipot2_cfg_t
Click configuration structure definition.
Definition: digipot2.h:105
digipot2_init
DIGIPOT2_RETVAL digipot2_init(digipot2_t *ctx, digipot2_cfg_t *cfg)
Initialization function.
digipot2_set_wiper_positions
void digipot2_set_wiper_positions(digipot2_t *ctx, uint8_t wiper_positions)
Set 8-bit wiper positions.
application_init
void application_init(void)
Definition: main.c:36