nvsram  2.0.0.0
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nvSRAM click

nvSRAM Click is a compact add-on board that contains the most reliable nonvolatile memory. This board features the CY14B101J, a 1-Mbit nvSRAM organized as 128K words of 8 bits each with a nonvolatile element in each memory cell from Cypress Semiconductor. The embedded nonvolatile elements incorporate the QuantumTrap technology and provide highly reliable nonvolatile storage of data.

click Product page


Click library

  • Author : Stefan Ilic
  • Date : Jul 2021.
  • Type : I2C type

Software Support

We provide a library for the nvSRAM 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 nvSRAM Click driver.

Standard key functions :

Example key functions :

  • nvsram_send_cmd The function sends the desired command to the CY14B101J2 1-Mbit (128K � 8) Serial (I2C) nvSRAM on nvSRAM click board.
    void nvsram_send_cmd ( nvsram_t *ctx, uint8_t cmd );
  • nvsram_memory_write The function writes a sequential data starting of the targeted 17-bit memory address
    void nvsram_memory_write ( nvsram_t *ctx, uint32_t mem_adr, uint8_t *p_tx_data, uint16_t n_bytes );
  • nvsram_memory_read The function read a sequential data starting from the targeted 17-bit memory address
    void nvsram_memory_read ( nvsram_t *ctx, uint32_t mem_adr, uint8_t *p_rx_data, uint16_t n_bytes );

Example Description

This is an example that demonstrates the use of the nvSRAM click board. In this example, we write and then read data from nvSRAM memory. Results are being sent to the Usart Terminal where you can track their changes. All data logs write on USB uart changes approximately for every 5 sec.

The demo application is composed of two sections :

Application Init

Initialization driver enables - I2C, lock Serial Number write, disable Block Protection and enable Memory Write, also write log.

void application_init ( void ) {
log_cfg_t log_cfg;
nvsram_cfg_t nvsram_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
mem_addr = 1024;
// Click initialization.
nvsram_cfg_setup( &nvsram_cfg );
NVSRAM_MAP_MIKROBUS( nvsram_cfg, MIKROBUS_1 );
err_t init_flag = nvsram_init( &nvsram, &nvsram_cfg );
if ( I2C_MASTER_ERROR == init_flag ) {
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
log_printf( &logger, " Serial Number Lock \r\n" );
log_printf( &logger, " None Block Protection \r\n" );
Delay_ms( 100 );
log_printf( &logger, " Enable Memory Write \r\n" );
Delay_ms( 100 );
log_info( &logger, " Application Task \r\n" );
}

Application Task

Writing data to a memory address, then reading it back and logging it onto uart terminal.

void application_task ( void ) {
log_printf( &logger, " Write data : %s \r\n", demo_data );
nvsram_memory_write( &nvsram, mem_addr, &demo_data[ 0 ], 9 );
log_printf( &logger, "- - - - - - - - - - - - \r\n" );
Delay_ms( 100 );
nvsram_memory_read( &nvsram, mem_addr, &read_data[ 0 ], 9 );
log_printf( &logger, " Read data : %s \r\n", read_data );
log_printf( &logger, "----------------------- \r\n" );
Delay_ms( 5000 );
}

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.nvSRAM

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.


demo_data
char demo_data[9]
Definition: main.c:31
NVSRAM_MAP_MIKROBUS
#define NVSRAM_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: nvsram.h:144
nvsram_init
err_t nvsram_init(nvsram_t *ctx, nvsram_cfg_t *cfg)
nvSRAM initialization function.
nvsram_enable_memory_write
void nvsram_enable_memory_write(nvsram_t *ctx, uint8_t en_wr_mem)
Enable memory write function.
application_task
void application_task(void)
Definition: main.c:75
mem_addr
uint32_t mem_addr
Definition: main.c:33
nvsram_t
nvSRAM Click context object.
Definition: nvsram.h:156
NVSRAM_SNL
#define NVSRAM_SNL
Definition: nvsram.h:110
NVSRAM_WRITE_MEMORY_ENABLE
#define NVSRAM_WRITE_MEMORY_ENABLE
Definition: nvsram.h:117
nvsram_memory_write
void nvsram_memory_write(nvsram_t *ctx, uint32_t mem_adr, uint8_t *p_tx_data, uint16_t n_bytes)
Write memory function.
NVSRAM_MEM_CTL_REG
#define NVSRAM_MEM_CTL_REG
nvSRAM description of control registers.
Definition: nvsram.h:58
read_data
char read_data[9]
Definition: main.c:32
nvsram_memory_read
void nvsram_memory_read(nvsram_t *ctx, uint32_t mem_adr, uint8_t *p_rx_data, uint16_t n_bytes)
Read memory function.
nvsram_cfg_t
nvSRAM Click configuration object.
Definition: nvsram.h:173
application_init
void application_init(void)
Definition: main.c:35
nvsram_reg_write
void nvsram_reg_write(nvsram_t *ctx, uint8_t reg, uint8_t tx_data)
Generic write the byte of data function.
nvsram_send_cmd
void nvsram_send_cmd(nvsram_t *ctx, uint8_t cmd)
Send command function.
nvsram_cfg_setup
void nvsram_cfg_setup(nvsram_cfg_t *cfg)
nvSRAM configuration object setup function.
NVSRAM_BP_NONE
#define NVSRAM_BP_NONE
nvSRAM description of block protection.
Definition: nvsram.h:105