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mikroSDK Library

DIGI POT 5 click

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Author: MikroElektronika Team

Last Updated: 2018-01-17

Category: Other Codes

Downloaded: 756 times

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DIGI POT 5 click is a digitally controlled quad potentiometer, with the resistance of 10KΩ. It has an 8bit wiper step resolution, which allows the wiper to take 257 different discrete positions (across 256 internal resistors).

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mikroSDK Library Blog

DIGI POT 5 Click

DIGI POT 5 Click

Native view of the DIGIPOT 5 Click board.

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DIGI POT 5 Click

DIGI POT 5 Click

Front and back view of the DIGI POT 5 Click board.

View full image

Library description

The library contains functions that perform basic SPI commands on click board registers.

Key functions:

uint8_t digipot5_writeReg(uint8_t regAddress, uint16_t writeData);- Function writes to the click board registers

uint8_t digipot5_readReg(uint8_t regAddress, uint16_t * pReadData);- Reads from the click board registers

uint8_t digipot5_setResistance(uint8_t regAddress, uint16_t value);- Sets the resistance of the selected wiper

Example description

  • System Initialization - Initializes pins, SPI peripheral and logger
  • Application Initialization - Initializes the click driver
  • Application Task (code snippet) - Demonstrates the use of various functions by setting different wipers to several different positions
    mikrobus_logWrite("Setting wiper 0 to zero scale value.", _LOG_LINE);
    digipot5_setResistance(_DIGIPOT5_WIPER0_VOLATILE, _DIGIPOT5_ZEROSCALE);
    mikrobus_logWrite("Setting wiper 1 to 3k Ohm.", _LOG_LINE);
    digipot5_setResistance(_DIGIPOT5_WIPER1_VOLATILE, _DIGIPOT5_3KOHM);
    mikrobus_logWrite("Setting wiper 2 to 5k Ohm.", _LOG_LINE);
    digipot5_setResistance(_DIGIPOT5_WIPER2_VOLATILE, _DIGIPOT5_HALFSCALE_5K);
    mikrobus_logWrite("Setting wiper 3 to full scale (10k Ohm).", _LOG_LINE);
    digipot5_setResistance(_DIGIPOT5_WIPER3_VOLATILE, _DIGIPOT5_FULLSCALE_10K);

    delay_ms(2000);
    mikrobus_logWrite("Decrementing wiper 3 by 5 steps.", _LOG_LINE);
    digipot5_decrementReg(_DIGIPOT5_WIPER3_VOLATILE);
    digipot5_decrementReg(_DIGIPOT5_WIPER3_VOLATILE);
    digipot5_decrementReg(_DIGIPOT5_WIPER3_VOLATILE);
    digipot5_decrementReg(_DIGIPOT5_WIPER3_VOLATILE);
    digipot5_decrementReg(_DIGIPOT5_WIPER3_VOLATILE);

    delay_ms(2000);
    mikrobus_logWrite("Decrementing wiper 3 by another 5 steps.", _LOG_LINE);
    digipot5_decrementReg(_DIGIPOT5_WIPER3_VOLATILE);
    digipot5_decrementReg(_DIGIPOT5_WIPER3_VOLATILE);
    digipot5_decrementReg(_DIGIPOT5_WIPER3_VOLATILE);
    digipot5_decrementReg(_DIGIPOT5_WIPER3_VOLATILE);
    digipot5_decrementReg(_DIGIPOT5_WIPER3_VOLATILE);

    delay_ms(2000);
    mikrobus_logWrite("Setting wiper 0 to full scale value.", _LOG_LINE);
    digipot5_setResistance(_DIGIPOT5_WIPER0_VOLATILE, _DIGIPOT5_FULLSCALE_10K);
    mikrobus_logWrite("Setting wiper 1 to 8k Ohm.", _LOG_LINE);
    digipot5_setResistance(_DIGIPOT5_WIPER1_VOLATILE, _DIGIPOT5_8KOHM);
    mikrobus_logWrite("Setting wiper 2 to 4k Ohm.", _LOG_LINE);
    digipot5_setResistance(_DIGIPOT5_WIPER2_VOLATILE, 0x68);
    mikrobus_logWrite("Setting wiper 3 to zero scale value.", _LOG_LINE);
    digipot5_setResistance(_DIGIPOT5_WIPER3_VOLATILE, _DIGIPOT5_ZEROSCALE);

Additional notes and information

Depending on the development board you are using, you may need USB UART clickUSB UART 2 clickor 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.

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