SRAM 3 Click

SRAM 3 Click is a compact add-on board that contains a serial non-volatile SRAM with a high storage capacity. This board features the ANV32AA1WDK66, a 1Mb serial SRAM with a non-volatile SONOS storage element included with each memory cell organized as 128k words of 8 bits each from Anvo-System Dresden. The serial SRAM provides fast access & cycle times, high data accuracy, ease of use, and unlimited read & write accessed by a high-speed SPI compatible bus. This Click board™ is suitable to store drive profiles, configurations, and similar data, or for applications such as medical devices, industrial automation (for example, motor control and robotics), smart metering systems, and many others.

Click Product page

Click library

• Author : Jelena Milosavljevic
• Date : Jul 2021.
• Type : SPI type

Software Support

We provide a library for the SRAM3 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 SRAM3 Click driver.

Standard key functions :

• sram3_cfg_setup Config Object Initialization function.

  void sram3_cfg_setup ( sram3_cfg_t *cfg );

• sram3_init Initialization function.

  err_t sram3_init ( sram3_t *ctx, sram3_cfg_t *cfg );

Example key functions :

• sram3_enable_write This function is for enabling writing to memory, status register or user serial.

  void sram3_enable_write( sram3_t *ctx );

• sram3_disable_write Function for disabling writing to memory, status register or user serial.

  void sram3_disable_write( sram3_t *ctx );

• sram3_protect_memory Function which secures part of memory from writing.

  void sram3_protect_memory( sram3_t *ctx, uint8_t protect_range );

Example Description

This is an example that shows the use of SRAM memory, using SRAM 3 Click. SRAM 3 Click is based on ANV32AA1W, and ANV32AA1W is a 1Mb serial SRAM with a non-volatile SONOS storage element included with each memory cell, organized as 128k words of 8 bits each. The devices are accessed by a high speed SPI-compatible bus. Specifically in this example, we used the high-speed SPI communication characteristics to write data to a specific registration address and read it.

The demo application is composed of two sections :

Application Init

Initialization SPI module, logger initalization and Click initialization.

void application_init ( void ) {
    log_cfg_t log_cfg;         /**< Logger config object. */
    sram3_cfg_t sram3_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.
    sram3_cfg_setup( &sram3_cfg );
    SRAM3_MAP_MIKROBUS( sram3_cfg, MIKROBUS_1 );
    err_t init_flag  = sram3_init( &sram3, &sram3_cfg );
    if ( SPI_MASTER_ERROR == init_flag ) {        
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
    sram3_release_hold( &sram3 );
    Delay_ms ( 100 );
}

Application Task

First, we write the data to the registry address 0x00, and then we read the data from 0x00 address.

void application_task ( void ) {
    char buff_out[ 10 ] = { 0 };

    log_printf( &logger, "Writing [ %s ] to memory...\r\n", buf );
    sram3_enable_write( &sram3 );
    sram3_write( &sram3, 0x00, &buf[0], 6 );

    Delay_ms ( 100 );
    sram3_read( &sram3, 0x00, &buff_out[0], 6 );
    Delay_ms ( 100 );
    log_printf( &logger, "Data read from memory: %s \r\n", buff_out );
    log_printf( &logger, "---------------------------------------------\r\n" );

    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.SRAM3

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.