Library Description

The library covers all the necessary functions that enables the usage of the UART Mux click board. User can write, read or check if there is a new byte received on all four channels that are available. Library also offers the functions taht allow user to inhibit or uninhibit the communication.

Key functions:

• void uartmux_writeByte(uint8_t input) - Writes sinle byte
• uint8_t uartmux_readByte() - Read received byte
• uint8_t uartmux_byteReady() - Checks is there a new byte received

Examples description

The application is composed of three sections :

• System Initialization - Initializes UART, GPIO and LOG structures, sets RST, CS and PWM pins as output.
• Application Initialization - Initalizes UART driver, uninhibites communication and makes an initial log.
• Application Task - (code snippet) This example demonstrates the use of UART Mux click board by eather sending or receiving the message on channel one of the device.

void applicationTask()
{
    char tmp;

// RECEIVER - UART polling
/*
    if ( 1 == uartmux_byteReadyChann1() )
    {
        tmp = uartmux_readByteChann1();
        mikrobus_logWrite( &tmp, _LOG_BYTE );
    }
*/
// TRANSMITER - TX each 2 sec

    for (tmp = 0; tmp < 9; tmp++)
    {
        uartmux_writeByteChann1( MESSAGE_DATA[tmp] );
    }

    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.