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USB UART Click

USB UART 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.

Click Library

  • Author : Stefan Ilic
  • Date : Jun 2021.
  • Type : UART type

Software Support

Example Description

This example reads and processes data from USB UART Clicks.

Example Libraries

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.USBUART

Example Key Functions

  • usbuart_cfg_setup Config Object Initialization function.
void usbuart_cfg_setup ( usbuart_cfg_t *cfg );
  • usbuart_init Initialization function.
err_t usbuart_init ( usbuart_t *ctx, usbuart_cfg_t *cfg );
  • usbuart_pwr_ctrl This function sets the Click turns Click on.
void usbuart_pwr_ctrl ( usbuart_t *ctx, uint8_t state );
  • usbuart_set_cts This function sets CTS pin.
void usbuart_set_cts ( usbuart_t *ctx, uint8_t state );
  • usbuart_send_command This function is used for sending commands.
void usbuart_send_command ( usbuart_t *ctx, char *command );

Application Init

Initializes driver and power module.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    usbuart_cfg_t usbuart_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );
    Delay_ms ( 100 );

    // Click initialization.

    usbuart_cfg_setup( &usbuart_cfg );
    USBUART_MAP_MIKROBUS( usbuart_cfg, MIKROBUS_1 );
    
    err_t init_flag  = usbuart_init( &usbuart, &usbuart_cfg );
    if ( UART_ERROR == init_flag ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    app_buf_len = 0;
    
    usbuart_pwr_ctrl( &usbuart, USBUART_POWER_ON );
    usbuart_set_cts( &usbuart, USBUART_CTS_NO_ACTIVE );
    usbuart_set_mode( &usbuart, USBUART_MODE_NORMAL );
    
    log_info( &logger, " Application Task " );
}

Application Task

Reads data and echos it back to device and logs it to board.

void application_task ( void ) 
{
    app_buf_len = usbuart_generic_read( &usbuart, app_buf, PROCESS_BUFFER_SIZE );
    
    if ( app_buf_len > 0 ) {
        log_printf( &logger, "%s", app_buf );
        memset( app_buf, 0, PROCESS_BUFFER_SIZE );
    }
}

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.