SPI Isolator 8 Click

SPI Isolator 8 Click is a compact add-on board representing a digital isolator optimized for a serial peripheral interface. This board features the ISOW7743, a quad-channel digital isolator from Texas Instruments. This device has a maximum data rate of 100Mbps and transfers digital signals between circuits with different power domains featuring reinforced isolation for a withstand voltage rating of 5kVRMS for 60 seconds.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Aug 2023.
• Type : SPI type

Software Support

We provide a library for the SPI Isolator 8 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for SPI Isolator 8 Click driver.

Standard key functions :

• spiisolator8_cfg_setup Config Object Initialization function.

  void spiisolator8_cfg_setup ( spiisolator8_cfg_t *cfg );

• spiisolator8_init Initialization function.

  err_t spiisolator8_init ( spiisolator8_t *ctx, spiisolator8_cfg_t *cfg );

• spiisolator8_default_cfg Click Default Configuration function.

  void spiisolator8_default_cfg ( spiisolator8_t *ctx );

Example key functions :

• spiisolator8_transfer SPI Isolator 8 data transfer function.

  err_t spiisolator8_transfer ( spiisolator8_t *ctx, uint8_t *data_in, uint8_t *data_out, uint8_t len );

• spiisolator8_enc_enable SPI Isolator 8 enable side 1 function.

  void spiisolator8_enc_enable ( spiisolator8_t *ctx );

• spiisolator8_enp_enable SPI Isolator 8 enable side 2 function.

  void spiisolator8_enp_enable ( spiisolator8_t *ctx );

Example Description

This example demonstrates the use of SPI Isolator 8 Click board™ by reading the manufacturer ID and device ID of the connected Flash 11 Click board™.

The demo application is composed of two sections :

Application Init

The initialization of SPI module, log UART, and additional pins. After the driver init, the application enabled both isolated sides of the device.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    spiisolator8_cfg_t spiisolator8_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.
    spiisolator8_cfg_setup( &spiisolator8_cfg );
    SPIISOLATOR8_MAP_MIKROBUS( spiisolator8_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == spiisolator8_init( &spiisolator8, &spiisolator8_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    spiisolator8_default_cfg ( &spiisolator8 );
    Delay_ms ( 100 );

    log_info( &logger, " Application Task " );
    log_printf( &logger, " -----------------------\r\n" );
    Delay_ms ( 100 );
}

Application Task

The demo application reads and checks the manufacturer ID and device ID of the connected Flash 11 Click board™. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void )
{
    static uint8_t cmd_get_id[ 6 ] = { FLASH11_CMD_GET_ID };
    static uint8_t read_id[ 6 ] = { 0 };
    if ( SPIISOLATOR8_OK == spiisolator8_transfer( &spiisolator8, &cmd_get_id[ 0 ], &read_id[ 0 ], 6 ) )
    {
        if ( ( FLASH11_MANUFACTURER_ID == read_id[ 4 ] ) && ( FLASH11_DEVICE_ID == read_id[ 5 ] ) )
        {
            log_printf( &logger, " Manufacturer ID: 0x%.2X\r\n", ( uint16_t ) read_id[ 4 ] );
            log_printf( &logger, " Device ID: 0x%.2X    \r\n", ( uint16_t ) read_id[ 5 ] );
            log_printf( &logger, " -----------------------\r\n" );
            Delay_ms ( 1000 );
            Delay_ms ( 1000 );
            Delay_ms ( 1000 );
        }
    }
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.SPIIsolator8

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. UART terminal is available in all MikroElektronika compilers.