Library Description

The library covers all the necessary functions to control Barcode 2 Click board. A library performs the communication with the device via UART interface.

Key functions:

• uint8_t barcode2_read_byte( ) - Read Single Byte.
• void barcode2_enable_scaning ( uint8_t en_state ) - Enable scaning function.
• void barcode2_enable_reset ( uint8_t en_state ) - Enable reset function.

Examples description

The application is composed of three sections :

• System Initialization - Initializes UART used for communication and another UART bus used for data logging.
• Application Initialization - Initializes UART driver.
• Application Task - (code snippet) - This is an example that demonstrates the use of the Barcode 2 Click board. Barcode 2 Click starts scanning every 2 seconds. When the barcode is detected, program enters interrupt routine and displays a scanned barcode or QRcode data. Then disables scanning also in an interval of 2 seconds. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( )
{
    mikrobus_logWrite( "---------------------", _LOG_LINE );
    mikrobus_logWrite( "    Scan barcodes:   ", _LOG_LINE );
    barcode2_enable_scaning( BARCODE2_ENABLE );
    Delay_ms( 2000 );

    mikrobus_logWrite( "", _LOG_LINE );
    mikrobus_logWrite( "---------------------", _LOG_LINE );
    mikrobus_logWrite( "   Scanning is off   ", _LOG_LINE );
    barcode2_enable_scaning( BARCODE2_DISABLE );
    Delay_ms( 2000 );
}

Other mikroE Libraries used in the example:

• 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.