Library Description

The library covers all the necessary functions to control Secure 7 click board.

Key functions:

• void secure7_send_bytes ( uint8_t count, uint8_t *p_buf ) - Send bytes function.
• void secure7_send_wake_token() - Send wake token function.
• uint8_t secure7_receive_bytes ( uint8_t count, uint8_t *p_buf ) - Receive bytes function.

Examples description

The application is composed of three sections :

• System Initialization - Initializes GPIO and start to write log.
• Application Initialization - Initialization driver enables - GPIO and configure swi for communication, also write log.
• Application Task - (code snippet) This is an example which demonstrates the use of Secure 7 Click board. Data is read from the secure chip. If the read out is successful the data is then display on the serial port in the hex format.

void application_task ( )
{
    if ( atcab_read_serial_number( &buffer_out[ 0 ] ) == ATCA_SUCCESS )
    {
        mikrobus_logWrite( " Serial number : ", _LOG_LINE );
        secure7_output_hex( &buffer_out[ 0 ], 9 );
    }
    else
    {
        mikrobus_logWrite( " Reading serial number failed...", _LOG_LINE );
    }
    
    mikrobus_logWrite( "----------------------------------------", _LOG_LINE );
    Delay_ms ( 1000 );

    if ( atcab_info( &buffer_out[ 0 ] )  == ATCA_SUCCESS )
    {
        mikrobus_logWrite( " Device revision information : ", _LOG_LINE );
        secure7_output_hex( &buffer_out[ 0 ], 4 );
    }
    else
    {
        mikrobus_logWrite( " Reading device revision information failed...", _LOG_LINE );
    }
    
    mikrobus_logWrite( "----------------------------------------", _LOG_LINE );
    Delay_ms ( 1000 );
    
    if ( atcab_read_config_zone( ATECC608A, &buffer_out[ 0 ] ) == ATCA_SUCCESS )
     {
        mikrobus_logWrite( " First 32 bytes of device configuration :",_LOG_LINE );
        secure7_output_hex( &buffer_out[ 0 ], 32 );
     }
     else
     {
        mikrobus_logWrite( " Reading config zone failed...",_LOG_LINE );
     }
    
    mikrobus_logWrite( "----------------------------------------", _LOG_LINE );
    Delay_ms( 10000 );
}

Additional Functions :

• secure7_set_output - SWI directions set implementation - output.
• secure7_set_input - SWI directions set implementation - input.
• secure7_output_hex - Display output data in hex format.

Other mikroE Libraries used in the example:

• GPIO
• 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.