pot4  2.1.0.0
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POT 4 click

POT 4 Click is a compact add-on board with accurate selectable reference voltage output. This board features the PRS11R-425F-S103B1, a high-quality 11mm rotary 10k potentiometer from Bourns. The PRS11R-425F-S103B1 features a small form factor, offers an push-on momentary switch, a flatted shaft style, and a wide operating temperature range. It comes with a high-resolution 12-bit ADC, detecting even the slightest move while digitizing its position, alongside a rail-to-rail buffering operational amplifier, which provides constant input and output impedance. Besides, the user can process the output signal in analog or digital form.

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Click library

  • Author : Stefan Filipovic
  • Date : Oct 2022.
  • Type : ADC/I2C type

Software Support

We provide a library for the POT 4 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 POT 4 Click driver.

Standard key functions :

Example key functions :

  • pot4_get_switch_pin This function returns the switch (SW) pin logic state.
    uint8_t pot4_get_switch_pin ( pot4_t *ctx );
  • pot4_read_voltage This function reads raw ADC value and converts it to proportional voltage level.
    err_t pot4_read_voltage ( pot4_t *ctx, float *voltage );
  • pot4_convert_voltage_to_percents This function converts analog voltage to potentiometer position in percents.
    uint8_t pot4_convert_voltage_to_percents ( pot4_t *ctx, float voltage );

Example Description

This example demonstrates the use of POT 4 click board by reading and displaying the potentiometer position.

The demo application is composed of two sections :

Application Init

Initializes the driver and logger.

void application_init ( void )
{
log_cfg_t log_cfg;
pot4_cfg_t pot4_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
pot4_cfg_setup( &pot4_cfg );
POT4_MAP_MIKROBUS( pot4_cfg, MIKROBUS_1 );
err_t init_flag = pot4_init( &pot4, &pot4_cfg );
if ( ( ADC_ERROR == init_flag ) || ( I2C_MASTER_ERROR == init_flag ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}

Application Task

Reads and displays on the USB UART the potentiometer position in forms of voltage and percents once per second only when the potentiometer switch is active.

void application_task ( void )
{
if ( !pot4_get_switch_pin ( &pot4 ) )
{
float voltage = 0;
if ( POT4_OK == pot4_read_voltage ( &pot4, &voltage ) )
{
log_printf( &logger, " AN Voltage : %.3f V\r\n", voltage );
log_printf( &logger, " Potentiometer : %u %%\r\n\n",
( uint16_t ) pot4_convert_voltage_to_percents ( &pot4, voltage ) );
Delay_ms( 1000 );
}
}
}

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.POT4

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.


pot4_read_voltage
err_t pot4_read_voltage(pot4_t *ctx, float *voltage)
POT 4 read voltage level function.
pot4_get_switch_pin
uint8_t pot4_get_switch_pin(pot4_t *ctx)
POT 4 get switch pin function.
pot4_cfg_setup
void pot4_cfg_setup(pot4_cfg_t *cfg)
POT 4 configuration object setup function.
pot4_init
err_t pot4_init(pot4_t *ctx, pot4_cfg_t *cfg)
POT 4 initialization function.
application_task
void application_task(void)
Definition: main.c:60
pot4_cfg_t
POT 4 Click configuration object.
Definition: pot4.h:137
pot4_t
POT 4 Click context object.
Definition: pot4.h:119
application_init
void application_init(void)
Definition: main.c:29
pot4_convert_voltage_to_percents
uint8_t pot4_convert_voltage_to_percents(pot4_t *ctx, float voltage)
POT 4 convert voltage to percents function.
POT4_OK
@ POT4_OK
Definition: pot4.h:159
POT4_MAP_MIKROBUS
#define POT4_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: pot4.h:94