Library Description

Library contains function for getting INT pin state Library contains functions for setting AN, PWM and CS pin states Library contains function for spi transfer Library contains functions for getting and setting registers via SPI Library contains functions for wiper increment and decrement Library contains function for getting wiper position Library contains function for getting raw adc data Library contains function for getting output voltage

Key functions:

• void charger11_spi_increment_wiper( void ) - increments wiper position by sending 8bit increment wiper command
• void charger11_spi_decrement_wiper( void ) - decrements wiper position by sending 8bit decrement wiper command
• float charger11_i2c_get_volt( float reference_voltage ) - gets raw ADC data and converts it to voltage based on reference voltage setting

Examples description

The application is composed of three sections :

• System Initialization - Initalizes INT, PWM, CS, AN pins and SPI, I2C, LOG modules
• Application Initialization - Initializes SPI and I2C drivers
• Application Task - Waits for user input in order to increment, decrement wiper or log report (Wiper position and Output voltage)

void applicationTask( )
{
    uart_ready = UART_Data_Ready( );
    
    if (uart_ready == 1)
    {
        uart_char = UART_Read( );
        
        switch (uart_char)
        {
            case '+' :
            {
                charger11_case_Plus( );
                break;
            }
            case '-' :
            {
                charger11_case_Minus( );
                break;
            }
            case 'r' :
            {
                charger11_case_Report( );
                break;
            }
            default :
            {
                mikrobus_logWrite( "> Invalid command", _LOG_LINE );
                break;
            }
        }
    }
}

Additional Functions :

• charger11_FloatCut( ) - Rounds float value to two decimals
• charger11_log_wiper_position( ) - Logs current Wiper position
• charger11_case_Plus( ) - Increments Wiper position
• charger11_case_Minus( ) - Decrements Wiper position
• charger11_case_Report( ) - Logs current Wiper position and Output voltage

Other mikroE Libraries used in the example:

• I2C
• SPI
• 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.