Empower your projects with SPI isolation using ISO7741 and STM32F413ZH

/*!
 * @file main.c
 * @brief SPIIsolator2 Click example
 *
 * # Description
 * This is an example that demonstrates the use of the SPI Isolator 2 Click board.
 * This board uses the ISO7741 which provides high electromagnetic immunity and low
 * emissions at low power consumption while isolating digital I/Os. In this example,
 * we write and then read data from the connected EEPROM 5 Click to the SPI Isolator 2
 * Click board.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes SPI, begins to write log, set write/read memory address, enable output.
 *
 * ## Application Task
 * Enables write to EEPROM, then writes the specified text message, and reads it back.
 * All data is being displayed on the USB UART where you can track the program flow.
 *
 * @author Jelena Milosavljevic
 *
 */

#include "board.h"
#include "log.h"
#include "spiisolator2.h"

static spiisolator2_t spiisolator2;
static log_t logger;
static uint8_t demo_data[ 7 ] = { 'M', 'i', 'k', 'r', 'o', 'E', 0 };
static uint8_t read_data[ 7 ] = { 0 };
static uint32_t memory_address = 1234;

void application_init ( void ) 
{
    log_cfg_t log_cfg;                         /**< Logger config object. */
    spiisolator2_cfg_t spiisolator2_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.
    spiisolator2_cfg_setup( &spiisolator2_cfg );
    SPIISOLATOR2_MAP_MIKROBUS( spiisolator2_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == spiisolator2_init( &spiisolator2, &spiisolator2_cfg ) ) 
    {        
        log_error( &logger, " Application Init Error. \r\n" );
        log_info( &logger, " Please, run program again... \r\n" );
        for ( ; ; );
    }
    Delay_ms ( 100 );

    spiisolator2_output_enable( &spiisolator2, SPIISOLATOR2_OUT_ENABLE );
    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );
}

void application_task ( void ) 
{
    spiisolator2_set_cmd( &spiisolator2, SPIISOLATOR2_EEPROM5_CMD_WREN );
    Delay_ms ( 10 );

    spiisolator2_multi_write( &spiisolator2, 
                              ( ( uint32_t ) SPIISOLATOR2_EEPROM5_CMD_WRITE << 24 ) | memory_address, 4, demo_data, 7 );
    log_printf( &logger," Write data : %s\r\n", demo_data );
    log_printf( &logger, "- - - - - - - - - - -\r\n" );
    Delay_ms ( 100 );

    spiisolator2_multi_read( &spiisolator2, 
                             ( ( uint32_t ) SPIISOLATOR2_EEPROM5_CMD_READ << 24 ) | memory_address, 4, read_data, 7 );
    Delay_ms ( 1000 );
    
    log_printf( &logger, " Read data  : %s\r\n", read_data );
    log_printf( &logger, "---------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

int main ( void ) 
{
    /* Do not remove this line or clock might not be set correctly. */
    #ifdef PREINIT_SUPPORTED
    preinit();
    #endif
    
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

// ------------------------------------------------------------------------ END