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66 lines
2.0 KiB
Markdown
66 lines
2.0 KiB
Markdown
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[](https://github.com/marketplace/actions/arduino_ci)
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[](https://github.com/RobTillaart/FRAM_I2C/blob/master/LICENSE)
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[](https://github.com/RobTillaart/FRAM_I2C/releases)
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# FRAM_I2C
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Arduino library for I2C FRAM
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## Description
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FRAM is a library to read and write (over I2C) to an FRAM module.
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FRAM is much faster than EEPROM and almost as fast as Arduino UNO RAM.
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Another imaportant feature is that FRAM keeps its content after a reboot (non-volatile)
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Types of FRAM the library should work with
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| SIZE | TYPE |
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|:---:|:---:|
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| 8KB | MB85RC64T |
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| 32KB | MB85RC256V |
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| 64KB | MB85RC512T |
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| 128KB | MB85RC1MT |
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Address = 0x50 (default) .. 0x57
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## Interface
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### Constructor
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- **FRAM(TwoWire \*wire = &Wire)** Constructor with optional Wire interface.
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- **int begin(address = 0x50, writeProtectPin = -1)** address and writeProtectPin is optional
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- **int begin(sda, scl, address = 0x50, writeProtectPin = -1)** idem fro ESP32 a.o.
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- **bool isConnected()** checks if the address is visable on the I2C bus
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### Write & read
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Support for basic types and 2 calls for generic object
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- **void write8(memaddr, value)** uint8_t
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- **void write16(memaddr, value)** uint16_t
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- **void write32(memaddr, value)** uint32_t
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- **void write( memaddr, \* obj, size)** other types / sizes
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- **uint8_t read8(memaddr)**
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- **uint16_t read16(memaddr)**
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- **uint32_t read32(memaddr)**
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- **void read(memaddr, uint8_t \* obj, size)**
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### Miscelaneous
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- **bool setWriteProtect(b)** make the FRAM writeprotect by pulling line HIGH / LOW.
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Returns true if a writeProtectPin was defined.
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Otherwise the FRAM cannot be write protected.
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- **uint16_t getManufacturerID()** idem
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- **uint16_t getProductID()** idem
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- **uint16_t getSize()** returns size in KB.
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## Operational
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See examples |