Library Description

The library includes functions to write or read data from UART. You can set state of pins(RST - BUS1, CS - BUS2) you want to change it, and get state of pin(INT - INH).

Key functions:

• void duallin_write_byte ( uint8_t input ) - Write single byte of data
• uint8_t duallin_read_byte ( void ) - Read single byte of data
• uint8_t duallin_byte_ready ( void ) - Check for new byte received
• uint8_t duallin_bus1_status ( uint8_t state ) - Sets state of bus1 pin

Examples description

The application is composed of three sections :

• System Initialization - Intializes UART module
• Application Initialization - Driver intialization
• Application Task - Choose one mode (read or write) of task. If you reading it checks if data is ready to be read and then reads one byte and if you are wiriting send data via UART.

void applicationTask(  )
{
    uint8_t tmp;
    char rec;
    uint8_t rdyFlag;
    uint8_t mode = DUALLIN_WRITE_MODE;

    if ( mode == DUALLIN_READ_MODE )
    {
        // RECEIVER - UART polling
        rdyFlag = duallin_byte_ready(  );

        if ( DUALLIN_DATA_READY == rdyFlag )
        {
            rec = duallin_read_byte(  );
            mikrobus_logWrite( &rec, _LOG_BYTE );
        }
    }
    else if ( mode == DUALLIN_WRITE_MODE )
    {
        // TRANSMITER - TX each 2 sec
        for ( tmp = 0; tmp < 11; tmp++ )
        {
            duallin_write_byte( MESSAGE_DATA[ tmp ] );
            if ( tmp < 6 )
            {
                Delay_ms( 100 );
            }
        }
        Delay_ms( 2000 );
    }
}

Other mikroE Libraries used in the example:

• UART

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.