Library Description

The library covers all the necessary functions to control DIGI POT 7 Click board™. Library performs a standard I2C interface communication.

Key functions:

• void digipot7_enable_write ( void ) - Enable write function.
• void digipot7_operating_mode ( uint8_t mode ) - Set operating mode function.
• DIGIPOT7_RETVAL_T digipot7_set_resistance ( uint16_t res_ohm ) - Set resistance function.

Examples description

The application is composed of three sections :

• System Initialization - Initializes I2C, set RST pin as an output and start to write a log.
• Application Initialization - Initialization driver enables - I2C, perform a hardware reset, enable write and set to normal operating mode, also write log.
• Application Task - (code snippet) This is an example that demonstrate the use of the DIGI POT 7 Click board™. In this example we set different resistance values: 1.024 kOhm, 2.048 kOhm, 4.096 kOhm and 8.192 kOhm. Results are being sent to the Usart Terminal where you can track their changes. All data logs write on USB uart changes approximately for every 5 sec.

void application_task ( )
{
    mikrobus_logWrite( " Set Resistance: 1.024 kOhm ", _LOG_LINE );
    mikrobus_logWrite( "----------------------------", _LOG_LINE );
    digipot7_set_resistance( 1024 );
    Delay_ms( 5000 );
    
    mikrobus_logWrite( " Set Resistance: 2.048 kOhm ", _LOG_LINE );
    mikrobus_logWrite( "----------------------------", _LOG_LINE );
    digipot7_set_resistance( 2048 );
    Delay_ms( 5000 );
    
    mikrobus_logWrite( " Set Resistance: 4.096 kOhm ", _LOG_LINE );
    mikrobus_logWrite( "----------------------------", _LOG_LINE );
    digipot7_set_resistance( 4096 );
    Delay_ms( 5000 );
    
    mikrobus_logWrite( " Set Resistance: 8.192 kOhm ", _LOG_LINE );
    mikrobus_logWrite( "----------------------------", _LOG_LINE );
    digipot7_set_resistance( 8192 );
    Delay_ms( 5000 );
}

Other Mikroe Libraries used in the example:

• I2C
• UART
• Conversions

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.