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Arduino IDE ESP8266 - library for SPI Serial SRam 23A1024/23LC1024 by Microchip Technology Inc.
This Library provides the interface for a 1Mbit SRAM chip with ESP8266 through SPI connection. Microchip 23A1024/23LC1024 - download datasheet here
Application written by Giancarlo Bacchio
Getting the code
You can install SRam Library for your ESP8266 downloading the code that is hosted at https://github.com/Gianbacchio/ESP8266_Spiram.
Selecting "Watch" box in the GitHub repository, you will be informed about the latest development updates of this library.
Installing the code
The downloaded code in *.zip format can be included as a new library into the IDE, selecting the menù:
Sketch / include Library / Add .Zip library
Usage
The Hardware connection is done using the standard HSPI interface of the ESP8266.
The chip is connected as per para 3.8 "SPI/SDI and SQI Pin designation" (see datasheet)
Power supply is 3,3Vcc.
| Pin on RAM chip | functionality | Pin on ESP8266 |
|---|---|---|
| pin1 | C/S | GPIO15 |
| pin2 | MISO | GPIO12 |
| pin3 | N/C | Gnd |
| pin4 | Vss | Gnd |
| pin5 | MOSI | GPIO13 |
| pin6 | SCK | GPIO14 |
| pin7 | HOLD | V+ |
| pin8 | Vcc | V+ |
Examples
- ESP_spiram.ino : a basic example to understand how the library works. You can write and read a Byte in a given location of the SRAM
License
You may copy, distribute and modify the software provided that modifications are described and licensed for free under LGPL-3. Derivatives works (including modifications or anything statically linked to the library) can only be redistributed under LGPL-3, but applications that use the library don't have to be.