Library Description

The library covers all the necessary functions to control USB-C Sink Click board™. A library performs the communication with the device via I2C interface.

Key functions:

• uint8_t usbcsink_generic_write ( uint8_t reg, uint8_t *p_tx_data, uint8_t n_bytes ) - Generic write function.
• void usbcsink_generic_read ( uint8_t reg, uint8_t *p_rx_data, uint8_t n_bytes ) - Generic read function.
• void usbcsink_set_pdo_num ( uint8_t pdo_numb ) - Set the number of sink function.

Examples description

The application is composed of three sections :

• System Initialization - Initializes I2C, sets AN, CS, INT and PWM pins as input and set RST pin as output and start to write log.
• Application Initialization - Initialization driver enables - I2C, set hw reset, set PDO2 profile and current value for PDO2 2.5A, upload new data and reset device to write NVM settings to the STUSB450, also write log.
• Application Task - (code snippet) This is an example which demonstrates the use of USB-C Sink Click board™. USB-C Sink Click board™ can be used to read the Power Data Objects (PDO) highest priority profile: PDO1 : 5V, PDO2 : 12V, PDO3 : 20V. All data logs write on USB uart changes for every 5 sec.

void application_task ( )
{
    usbcsink_load_data( );

    mikrobus_logWrite( "     New Parameters     ", _LOG_LINE );
    mikrobus_logWrite( "------------------------", _LOG_LINE );
    
    sel_profile = usbcsink_get_pdo_num( );
    
    mikrobus_logWrite( "    PDO Number ~ ", _LOG_TEXT );
    mikrobus_logWrite( "PDO", _LOG_TEXT );
    ByteToStr( sel_profile, log_text );
    Ltrim( log_text );
    mikrobus_logWrite( log_text, _LOG_LINE );
    mikrobus_logWrite( "- - - - - - - - - - - - ", _LOG_LINE );

    demo_data = usbcsink_get_voltage( sel_profile );
    
    mikrobus_logWrite( " Voltage : ", _LOG_TEXT );
    FloatToStr( demo_data, log_text );
    Ltrim( log_text );
    mikrobus_logWrite( log_text, _LOG_TEXT );
    mikrobus_logWrite( " V", _LOG_LINE );

    demo_data = usbcsink_get_current( sel_profile );
    
    mikrobus_logWrite( " Current :  ", _LOG_TEXT );
    FloatToStr( demo_data, log_text );
    Ltrim( log_text );
    mikrobus_logWrite( log_text, _LOG_TEXT );
    mikrobus_logWrite( " A", _LOG_LINE );
    mikrobus_logWrite( "------------------------", _LOG_LINE );
    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.