Library Description

The library covers all the necessary functions that enables the usage of the MRAM 2 Click board. It initializes and defines the SPI bus driver and drivers that offer a full functionality of the click board. User has Read Status Register, Write Enable, Write Disable, Write Status Register, Read Data Bytes, Fast Read Data Bytes, Write Data Bytes, Enter Sleep Mode, Exit Sleep, Tamper Detect, Tamper Detect Exit and Read IDfunctions at his disposal.

Key functions:

• void mram2_write ( uint32_t mem_adr, uint8_t *wr_data, uint8_t n_bytes ); - The Write Data Bytes function allows data bytes to be written sequentially.
• void mram2_read ( uint32_t mem_adr, uint8_t *rd_data, uint8_t n_bytes ); - The Read Data Bytes function allows data bytes to be continuously read starting at an initial address.
• void mram2_wren ( ); - Function is used to enable write operation.

Examples description

The application is composed of three sections :

• System Initialization - Initializes SPI module, LOG structure, sets CS, RTS and INT pins as output.
• Application Initialization - Initalizes SPI driver and sets up the device.
• Application Task - This example shows capabilities of MRAM 2 Click board by writting "MikroE" into first 6 memory locations, and then reading it back.

void application_task ( )
{
    mikrobus_logWrite( "Write enable!", _LOG_LINE );
    mram2_wren( );
    Delay_ms( 100 );
    mikrobus_logWrite( "Writing : ", _LOG_TEXT );
    mikrobus_logWrite( val_in, _LOG_TEXT );
    mram2_write( 0x000000, &val_in[ 0 ], 9 );
    Delay_ms( 100 );
    mikrobus_logWrite( "Write disable!", _LOG_LINE );
    mram2_wrdi ( );
    Delay_ms( 100 );
    mikrobus_logWrite( "Reading : ", _LOG_TEXT );
    mram2_read ( 0x000000, &val_out[ 0 ], 9 );
    mikrobus_logWrite( val_out, _LOG_TEXT );
    
    mikrobus_logWrite( "-------------------", _LOG_LINE );
    Delay_ms( 5000 );
}

Other mikroE Libraries used in the example:

• SPI
• UART

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.