SRAM 4 Click

SRAM 4 Click is a compact add-on board that contains highly reliable nonvolatile memory. This board features the CY14B512Q, a 512Kbit SRAM with a nonvolatile element in each memory cell from Cypress Semiconductor, now part of Infineon.

Click Product page

Click library

• Author : Luka FIlipovic
• Date : Aug 2021.
• Type : SPI type

Software Support

We provide a library for the SRAM4 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 SRAM4 Click driver.

Standard key functions :

• sram4_cfg_setup Config Object Initialization function.

  void sram4_cfg_setup ( sram4_cfg_t *cfg );

• sram4_init Initialization function.

  err_t sram4_init ( sram4_t *ctx, sram4_cfg_t *cfg );

• sram4_default_cfg Click Default Configuration function.

  err_t sram4_default_cfg ( sram4_t *ctx );

Example key functions :

• sram4_memory_read Read data from memory.

  err_t sram4_memory_read ( sram4_t *ctx, uint16_t memory_adr, uint8_t *read_data, uint8_t read_len );

• sram4_memory_write Write data to memory.

  err_t sram4_memory_write ( sram4_t *ctx, uint16_t memory_adr, uint8_t *write_data, uint8_t write_len );

• sram4_generic_command Command writing function.

  err_t sram4_generic_command ( sram4_t *ctx, uint8_t cmd );

Example Description

This example application showcases ability of device ability to manipulate with memory( writing and reading data ).

The demo application is composed of two sections :

Application Init

Initialization of communication modules(SPI, UART) and additional pins. Reads ID and checks if it matches with SRAM4_DEVICE_ID to check communication. Then clears protection from memory access.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    sram4_cfg_t sram4_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.
    sram4_cfg_setup( &sram4_cfg );
    SRAM4_MAP_MIKROBUS( sram4_cfg, MIKROBUS_1 );
    err_t init_flag  = sram4_init( &sram4, &sram4_cfg );
    if ( SPI_MASTER_ERROR == init_flag )
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );
        for ( ; ; );
    }

    if ( sram4_default_cfg ( &sram4 ) )
    {
        log_error( &logger, " Default configuration. " );
        log_info( &logger, " Please, run program again... " );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

Application Task

Writes 3 times to memory with length of data offset in memory addres. Then reads 2 times first 2 data written should be read in one read, and 3rd write should be read separately.

void application_task ( void )
{
    char read_buf[ 100 ] = { 0 };
    char click_name[ ] = "SRAM 4";
    char company_name[ ] = "MikroE";
    char product_name[ ] = " Click board";
    static const uint16_t START_ADR = 0x0001;
    uint16_t mem_adr = START_ADR;

    //Write Data
    sram4_memory_write( &sram4, mem_adr, click_name, strlen( click_name ) );
    mem_adr += strlen( click_name );
    sram4_memory_write( &sram4, mem_adr, product_name, strlen( product_name ) );
    mem_adr += strlen( product_name );
    sram4_memory_write( &sram4, mem_adr, company_name, strlen( company_name ) );

    //Read Data
    mem_adr = START_ADR;
    sram4_memory_read( &sram4, mem_adr, read_buf, strlen( click_name ) + strlen( product_name ) );
    log_printf( &logger, " > Read Data from 0x%.4X memory address: %s\r\n", mem_adr, read_buf );
    memset( read_buf, 0, strlen( read_buf ) );
    mem_adr += strlen(click_name) + strlen( product_name );
    sram4_memory_read( &sram4, mem_adr, read_buf, strlen( company_name ) );
    log_printf( &logger, " > Read Data from 0x%.4X memory address: %s\r\n", mem_adr, read_buf );
    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.SRAM4

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. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.