bm78

---

BM78 Click

BM78 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 : Feb 2024.
• Type : UART type

Software Support

Example Description

This example demonstrates the use of BM78 Click board by processing the incoming data and displaying them on the USB UART.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.BM78

Example Key Functions

• bm78_cfg_setup Config Object Initialization function.

void bm78_cfg_setup ( bm78_cfg_t *cfg );

• bm78_init Initialization function.

err_t bm78_init ( bm78_t *ctx, bm78_cfg_t *cfg );

• bm78_eeprom_send_cmd This function is used to send specific EEPROM command by using UART serial interface.

err_t bm78_eeprom_send_cmd ( bm78_t *ctx, uint16_t op_code, uint8_t *param, uint8_t len );

• bm78_eeprom_write This function is used to write data into the EEPROM location specified by the address parameter.

err_t bm78_eeprom_write ( bm78_t *ctx, uint16_t address, uint8_t *data_in, uint8_t len );

• bm78_flash_eeprom This function is used write default configuration into the EEPROM.

err_t bm78_flash_eeprom ( bm78_t *ctx );

Application Init

Initializes the driver and performs the Click default configuration by writing it into the EEPROM.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    bm78_cfg_t bm78_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 " );

    // Click initialization.
    bm78_cfg_setup( &bm78_cfg );
    BM78_MAP_MIKROBUS( bm78_cfg, MIKROBUS_1 );
    if ( UART_ERROR == bm78_init( &bm78, &bm78_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    uint8_t tmp_data[ 16 ];
    bm78_generic_read( &bm78, &tmp_data, 1 );  
    Delay_ms ( 100 );

    log_printf( &logger, " = = = = = = = = = = = = = = = = = \r\n" );
    log_printf( &logger, " Place Click into Write EEPROM mode \r\n" );
    log_printf( &logger, " By setting MODE SEL in the following configuration \r\n" );
    log_printf( &logger, "         | 1 | 2 | 3 |             \r\n" );
    log_printf( &logger, "         | H | L | L |             \r\n" );
    log_printf( &logger, " = = = = = = = = = = = = = = = = = \r\n" );
    log_printf( &logger, " Send YES once you placed Click into Write EEPROM mode \r\n" );
    #define WANTED_ANSWER "YES/r/n"
    log_printf( &logger, " = = = = = = = = = = = = = = = = = \r\n" );
    while ( 1 )
    {
        log_read( &logger, &tmp_data, 5 );
        
        if ( 0 == strstr ( WANTED_ANSWER, tmp_data ) )
        {
            break;
        }
        else
        {
            log_printf( &logger, " Send YES once you placed Click into Write EEPROM mode \r\n" );
        }
    }
    bm78_hw_reset( &bm78 );
    log_printf( &logger, " Writing into the EEPROM \r\n" );
    if ( BM78_ERROR == bm78_flash_eeprom ( &bm78 ) )
    {
        log_error( &logger, " EEPROM Flash failed. " );
        log_printf( &logger, " Check Selected Click mode. \r\n" );
        for ( ; ; );
    }

    log_printf( &logger, " = = = = = = = = = = = = = = = = = \r\n" );
    log_printf( &logger, " Place Click into Application mode \r\n" );
    log_printf( &logger, " By setting MODE SEL in the following configuration \r\n" );
    log_printf( &logger, "         | 1 | 2 | 3 |             \r\n" );
    log_printf( &logger, "         | L | L | L |             \r\n" );
    log_printf( &logger, " = = = = = = = = = = = = = = = = = \r\n" );
    log_printf( &logger, " Send YES once you placed Click into Application mode \r\n" );
    log_printf( &logger, " = = = = = = = = = = = = = = = = = \r\n" );
    while ( 1 )
    {
        log_read( &logger, &tmp_data, 5 );
        
        if ( 0 == strstr ( WANTED_ANSWER, tmp_data ) )
        {
            break;
        }
        else
        {
            log_printf( &logger, " Send YES once you placed Click into Application mode \r\n" );
        }
    }
    bm78_hw_reset( &bm78 );

    log_info( &logger, " Application Task " );
    log_printf( &logger, " Connect to the device using the Serial Bluetooth Terminal App \r\n\r\n" );
}

Application Task

Reads and processes all incoming data from the Serial Bluetooth Terminal smartphone application and displays them on the USB UART.

void application_task ( void ) 
{
    if ( BM78_OK == bm78_process( &bm78 ) ) 
    {
        bm78_log_app_buf( );
        bm78_clear_app_buf( );
    }
}

Note

We have used the Serial Bluetooth Terminal smartphone application for the test. A smartphone and the Click board must be paired in order to exchange messages with each other.

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.

---