Deliver the high-speed memory needed for cutting-edge applications using CY14B512Q and ATmega32
Your data, instantly accessible – Thanks to SRAM
Published Nov 01, 2023
Click board™
SRAM 4 Click
Dev Board
EasyAVR v7
Compiler
NECTO Studio
MCU
ATmega32
SRAM's combination of speed and power efficiency makes it an essential component in the world of modern electronics
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Hardware Overview
How does it work?
SRAM 4 Click is based on the CY14B512Q, a 512Kbit nvSRAM memory organized as 64K words of 8 bits each from Infineon. The nvSRAM specifies one million endurance cycles for nonvolatile cells with data retention of a minimum of 20 years. All the reads and writes to nvSRAM happen to the SRAM, which gives nvSRAM the unique capability to handle infinite writes to the memory. The embedded nonvolatile elements incorporate the QuantumTrap technology, making this Click board™ an ideal choice for secure data storage, creating the world’s most reliable nonvolatile memory. The CY14B512Q communicates with MCU through a standard SPI interface that enables very high clock speeds up to 40MHz with zero cycle
delay read and write cycles. It also supports the two most common modes, SPI Mode 0 and 3, and 104 MHz SPI access speed with special instructions for the read operation. Besides, the SRAM 4 Click also has an additional HOLD signal, routed to the PWM pin of the mikroBUS™ socket labeled as HLD, used to suspend the serial communication without resetting the serial sequence. The CY14B512Q uses the standard SPI opcodes for memory access. In addition to the general SPI instructions for reading and writing, also provide four special instructions: STORE, RECALL, AutoStore Disable, and AutoStore Enable. The significant benefit of this memory over serial EEPROMs is that all reads and writes to nvSRAM
are performed at the speed of the SPI bus with zero cycle delay. Therefore, no wait time is required after any of the memory accesses. Only the STORE and RECALL operations need finite time to complete, and all memory accesses are inhibited during this time. This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.
Features overview
Development board
EasyAVR v7 is the seventh generation of AVR development boards specially designed for the needs of rapid development of embedded applications. It supports a wide range of 16-bit AVR microcontrollers from Microchip and has a broad set of unique functions, such as a powerful onboard mikroProg programmer and In-Circuit debugger over USB. The development board is well organized and designed so that the end-user has all the necessary elements in one place, such as switches, buttons, indicators, connectors, and others. With four different connectors for each port, EasyAVR v7 allows you to connect accessory boards, sensors, and custom electronics more
efficiently than ever. Each part of the EasyAVR v7 development board contains the components necessary for the most efficient operation of the same board. An integrated mikroProg, a fast USB 2.0 programmer with mikroICD hardware In-Circuit Debugger, offers many valuable programming/debugging options and seamless integration with the Mikroe software environment. Besides it also includes a clean and regulated power supply block for the development board. It can use a wide range of external power sources, including an external 12V power supply, 7-12V AC or 9-15V DC via DC connector/screw terminals, and a power source via the USB Type-B (USB-B)
connector. Communication options such as USB-UART and RS-232 are also included, alongside the well-established mikroBUS™ standard, three display options (7-segment, graphical, and character-based LCD), and several different DIP sockets which cover a wide range of 16-bit AVR MCUs. EasyAVR v7 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.
Microcontroller Overview
MCU Card / MCU
Architecture
AVR
MCU Memory (KB)
32
Silicon Vendor
Microchip
Pin count
40
RAM (Bytes)
2048
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the EasyAVR v7 as your development board.
Track your results in real time
Application Output
After pressing the "FLASH" button on the left-side panel, it is necessary to open the UART terminal to display the achieved results. By clicking on the Tools icon in the right-hand panel, multiple different functions are displayed, among which is the UART Terminal. Click on the offered "UART Terminal" icon.
Once the UART terminal is opened, the window takes on a new form. At the top of the tab are two buttons, one for adjusting the parameters of the UART terminal and the other for connecting the UART terminal. The tab's lower part is reserved for displaying the achieved results. Before connecting, the terminal has a Disconnected status, indicating that the terminal is not yet active. Before connecting, it is necessary to check the set parameters of the UART terminal. Click on the "OPTIONS" button.
In the newly opened UART Terminal Options field, we check if the terminal settings are correct, such as the set port and the Baud rate of UART communication. If the data is not displayed properly, it is possible that the Baud rate value is not set correctly and needs to be adjusted to 115200. If all the parameters are set correctly, click on "CONFIGURE".
The next step is to click on the "CONNECT" button, after which the terminal status changes from Disconnected to Connected in green, and the data is displayed in the Received data field.
Software Support
Library Description
This library contains API for SRAM 4 Click driver.
Key functions:
sram4_memory_read- Read data from memory.sram4_memory_write- Write data to memory.sram4_generic_command- Command writing function.
Open Source
Code example
This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.
/*!
* @file main.c
* @brief SRAM4 Click 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.
*
* ## Application Task
* Writes 3 times to memory with length of data offset in memory address.
* Then reads 2 times first 2 data written should be read in one read,
* and 3rd write should be read separately.
*
* @author Luka FIlipovic
*
*/
#include "board.h"
#include "log.h"
#include "sram4.h"
static sram4_t sram4;
static log_t logger;
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 " );
}
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( 3000 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
