usbuart6

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USB UART 6 Click

USB UART 6 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

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Click Library

• Author : Stefan Filipovic
• Date : Jul 2025.
• Type : UART type

Software Support

Example Description

This example demonstrates the USB UART 6 Click board's ability to act as a USB-to-UART bridge. It enables bidirectional communication between a USB host and a UART device by forwarding received data between the USB and UART interfaces.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.USBUART6

Example Key Functions

• usbuart6_cfg_setup This function initializes Click configuration structure to initial values.

  void usbuart6_cfg_setup ( usbuart6_cfg_t *cfg );

• usbuart6_init This function initializes all necessary pins and peripherals used for this Click board.

  err_t usbuart6_init ( usbuart6_t *ctx, usbuart6_cfg_t *cfg );

• usbuart6_generic_write This function writes a desired number of data bytes by using UART serial interface.

  err_t usbuart6_generic_write ( usbuart6_t *ctx, uint8_t *data_in, uint16_t len );

• usbuart6_generic_read This function reads a desired number of data bytes by using UART serial interface.

  err_t usbuart6_generic_read ( usbuart6_t *ctx, uint8_t *data_out, uint16_t len );

• usbuart6_enable_device This function enables the device by setting the EN pin to high logic state.

  void usbuart6_enable_device ( usbuart6_t *ctx );

Application Init

Initializes the logger and the Click board and enables the device.

void application_init ( void )
{
    log_cfg_t log_cfg;  
    usbuart6_cfg_t usbuart6_cfg;  

    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );
 
    // Click initialization.
    usbuart6_cfg_setup( &usbuart6_cfg );
    USBUART6_MAP_MIKROBUS( usbuart6_cfg, MIKROBUS_1 );
    if ( UART_ERROR == usbuart6_init( &usbuart6, &usbuart6_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    usbuart6_enable_device ( &usbuart6 );
    
    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );
 
    // Dummy read to enable RX interrupts
    uart_read( &usbuart6.uart, app_buf, 1 );
    uart_read( &logger.uart, app_buf, 1 );
}

Application Task

Continuously reads the data from one UART interface and forwards it to the other, enabling seamless USB to UART data transfer and vice versa.

void application_task ( void )
{
    if ( uart_bytes_available ( &logger.uart ) ) 
    {
        app_buf_len = uart_read( &logger.uart, app_buf, PROCESS_BUFFER_SIZE );
        if ( app_buf_len > 0 )
        {
            uart_write ( &usbuart6.uart, app_buf, app_buf_len );
            memset( app_buf, 0, app_buf_len );
            app_buf_len = 0;
        }
    }
    if ( uart_bytes_available ( &usbuart6.uart ) ) 
    {
        app_buf_len = uart_read( &usbuart6.uart, app_buf, PROCESS_BUFFER_SIZE );
        if ( app_buf_len > 0 )
        {
            uart_write ( &logger.uart, app_buf, app_buf_len );
            memset( app_buf, 0, app_buf_len );
            app_buf_len = 0;
        }
    }
}

Note

Make sure the USB UART 6 Click is properly connected to a USB host and the mikroBUS socket, and that both UART interfaces are configured for the same baud rate.

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

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