Library Description

The library covers all the necessary functions to control SPI Isolator 2 Click board™. Library performs a standard SPI interface communication.

Key functions:

• void spiisolator2_output_enable ( uint8_t en_out ) - Output enable function.
• int8_t addr_n_bytes, uint8_t *p_tx_data, uint8_t tx_data_n_bytes )  - Multi write function.
• uint8_t addr_n_bytes, uint8_t *p_rx_data, uint8_t tx_data_n_bytes ) - Multi read function.

Examples description

The application is composed of three sections :

• System Initialization - Initializes SPI, set RST and CS pin as outputs, begins to write log.
• Application Initialization - Initialization driver enables - SPI, set write/read memory address, enable output, also write log.
• Application Task - (code snippet) This is an example that demonstrates the use of the SPI Isolator 2 Click board™. In this example, we write and then read data from the connected EEPROM 5 click to the SPI Isolator 2 Click board™. 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 ( )
{
    spiisolator2_set_cmd( SPIISOLATOR2_EEPROM5_CMD_WRITE_ENABLE );
    Delay_ms( 10 );

    spiisolator2_multi_write( SPIISOLATOR2_EEPROM5_CMD_WRITE | memory_address,
                              4, 
                              &demo_data[ 0 ], 
                              9 );
    mikrobus_logWrite( " Write data : ", _LOG_TEXT );

    for ( n_cnt = 0; n_cnt < 9; n_cnt++ )
    {
        mikrobus_logWrite( &demo_data[ n_cnt ], _LOG_BYTE );
    }

    mikrobus_logWrite( "- - - - - - - - - - - ", _LOG_LINE );

    Delay_ms( 100 );

    mikrobus_logWrite( " Read data  : ", _LOG_TEXT );

    spiisolator2_multi_read( SPIISOLATOR2_EEPROM5_CMD_READ | memory_address,
                             4, 
                             &read_data[ 0 ], 
                             9 );
    Delay_ms( 1000 );

    for ( n_cnt = 0; n_cnt < 9; n_cnt++ )
    {
        mikrobus_logWrite( &read_data[ n_cnt ], _LOG_BYTE );
    }

    mikrobus_logWrite( "----------------------", _LOG_LINE );
    Delay_ms( 5000 );
}

Other Mikroe Libraries used in the example:

• 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.