mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
557 lines
11 KiB
C++
557 lines
11 KiB
C++
//
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// FILE: FRAM.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.4.3
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// DATE: 2018-01-24
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// PURPOSE: Arduino library for I2C FRAM
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// URL: https://github.com/RobTillaart/FRAM_I2C
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//
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// HISTORY: see CHANGELOG.md
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#include "FRAM.h"
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// DENSITY CODES
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#define FRAM_MB85RC64 0x03
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#define FRAM_MB85RC256 0x05
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#define FRAM_MB85RC512 0x06
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#define FRAM_MB85RC1M 0x07
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// used for metadata and sleep
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const uint8_t FRAM_SLAVE_ID_ = 0x7C; // == 0xF8
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const uint8_t FRAM_SLEEP_CMD = 0x86; //
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/////////////////////////////////////////////////////
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//
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// PUBLIC
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//
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FRAM::FRAM(TwoWire *wire)
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{
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_wire = wire;
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_address = 0x50;
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_writeProtectPin = -1;
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_sizeBytes = 0;
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}
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#if defined (ESP8266) || defined(ESP32)
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int FRAM::begin(int sda, int scl, const uint8_t address,
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const int8_t writeProtectPin)
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{
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if ((address < 0x50) || (address > 0x57)) return FRAM_ERROR_ADDR;
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_wire = &Wire;
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_address = address;
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if ((sda < 255) && (scl < 255))
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{
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_wire->begin(sda, scl);
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} else {
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_wire->begin();
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}
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if (writeProtectPin > -1)
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{
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_writeProtectPin = writeProtectPin;
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pinMode(_writeProtectPin, OUTPUT);
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}
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if (! isConnected()) return FRAM_ERROR_CONNECT;
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getSize();
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return FRAM_OK;
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}
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#endif
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int FRAM::begin(const uint8_t address,
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const int8_t writeProtectPin)
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{
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if ((address < 0x50) || (address > 0x57)) return FRAM_ERROR_ADDR;
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_address = address;
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_wire->begin();
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if (writeProtectPin > -1)
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{
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_writeProtectPin = writeProtectPin;
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pinMode(_writeProtectPin, OUTPUT);
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}
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if (! isConnected()) return FRAM_ERROR_CONNECT;
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getSize();
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return FRAM_OK;
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}
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bool FRAM::isConnected()
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{
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_wire->beginTransmission(_address);
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return (_wire->endTransmission() == 0);
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}
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void FRAM::write8(uint16_t memaddr, uint8_t value)
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{
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uint8_t val = value;
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_writeBlock(memaddr, (uint8_t *)&val, sizeof(uint8_t));
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}
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void FRAM::write16(uint16_t memaddr, uint16_t value)
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{
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uint16_t val = value;
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_writeBlock(memaddr, (uint8_t *)&val, sizeof(uint16_t));
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}
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void FRAM::write32(uint16_t memaddr, uint32_t value)
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{
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uint32_t val = value;
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_writeBlock(memaddr, (uint8_t *)&val, sizeof(uint32_t));
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}
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void FRAM::writeFloat(uint16_t memaddr, float value)
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{
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float val = value;
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_writeBlock(memaddr, (uint8_t *)&val, sizeof(float));
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}
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void FRAM::writeDouble(uint16_t memaddr, double value)
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{
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double val = value;
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_writeBlock(memaddr, (uint8_t *)&val, sizeof(double));
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}
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void FRAM::write(uint16_t memaddr, uint8_t * obj, uint16_t size)
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{
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const int blocksize = 24;
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uint8_t * p = obj;
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while (size >= blocksize)
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{
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_writeBlock(memaddr, p, blocksize);
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memaddr += blocksize;
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p += blocksize;
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size -= blocksize;
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}
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// remaining
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if (size > 0)
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{
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_writeBlock(memaddr, p, size);
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}
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}
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uint8_t FRAM::read8(uint16_t memaddr)
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{
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uint8_t val;
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_readBlock(memaddr, (uint8_t *)&val, sizeof(uint8_t));
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return val;
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}
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uint16_t FRAM::read16(uint16_t memaddr)
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{
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uint16_t val;
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_readBlock(memaddr, (uint8_t *)&val, sizeof(uint16_t));
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return val;
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}
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uint32_t FRAM::read32(uint16_t memaddr)
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{
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uint32_t val;
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_readBlock(memaddr, (uint8_t *)&val, sizeof(uint32_t));
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return val;
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}
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float FRAM::readFloat(uint16_t memaddr)
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{
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float val;
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_readBlock(memaddr, (uint8_t *)&val, sizeof(float));
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return val;
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}
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double FRAM::readDouble(uint16_t memaddr)
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{
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double val;
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_readBlock(memaddr, (uint8_t *)&val, sizeof(double));
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return val;
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}
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void FRAM::read(uint16_t memaddr, uint8_t * obj, uint16_t size)
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{
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const uint8_t blocksize = 24;
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uint8_t * p = obj;
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while (size >= blocksize)
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{
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_readBlock(memaddr, p, blocksize);
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memaddr += blocksize;
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p += blocksize;
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size -= blocksize;
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}
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// remainder
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if (size > 0)
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{
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_readBlock(memaddr, p, size);
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}
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}
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bool FRAM::setWriteProtect(bool b)
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{
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if (_writeProtectPin < 0) return false;
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digitalWrite(_writeProtectPin, b ? HIGH : LOW);
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return true;
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}
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bool FRAM::getWriteProtect()
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{
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if (_writeProtectPin < 0) return false;
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return (digitalRead(_writeProtectPin) == HIGH);
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}
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uint16_t FRAM::getManufacturerID()
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{
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return _getMetaData(0);
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}
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uint16_t FRAM::getProductID()
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{
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return _getMetaData(1);
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}
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// NOTE: returns the size in kiloBYTE
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uint16_t FRAM::getSize()
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{
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uint16_t density = _getMetaData(2);
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uint16_t size = 0;
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if (density > 0) size = (1UL << density);
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_sizeBytes = size * 1024UL;
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return size;
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}
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uint32_t FRAM::getSizeBytes()
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{
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return _sizeBytes;
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};
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// override to be used when getSize() fails == 0
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void FRAM::setSizeBytes(uint32_t value)
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{
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_sizeBytes = value;
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}
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uint32_t FRAM::clear(uint8_t value)
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{
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uint8_t buf[16];
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for (uint8_t i = 0; i < 16; i++) buf[i] = value;
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uint32_t start = 0;
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uint32_t end = _sizeBytes;
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for (uint32_t addr = start; addr < end; addr += 16)
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{
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_writeBlock(addr, buf, 16);
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}
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return end - start;
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}
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// EXPERIMENTAL - to be confirmed
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// page 12 datasheet
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// command = S 0xF8 A address A S 86 A P (A = Ack from slave )
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void FRAM::sleep()
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{
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_wire->beginTransmission(FRAM_SLAVE_ID_); // S 0xF8
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_wire->write(_address << 1); // address << 1
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_wire->endTransmission(false); // no stoP
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_wire->beginTransmission(FRAM_SLEEP_CMD >> 1); // S 0x86
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_wire->endTransmission(true); // stoP
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}
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// page 12 datasheet trec <= 400us
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bool FRAM::wakeup(uint32_t trec)
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{
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bool b = isConnected(); // wakeup
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if (trec == 0) return b;
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// wait recovery time
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delayMicroseconds(trec);
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return isConnected(); // check recovery OK
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}
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///////////////////////////////////////////////////////////
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//
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// PRIVATE
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//
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// metadata is packed as [....MMMM][MMMMDDDD][PPPPPPPP]
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// M = manufacturerID
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// D = density => memory size = 2^D KB
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// P = product ID (together with D)
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uint16_t FRAM::_getMetaData(uint8_t field)
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{
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if (field > 2) return 0;
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_wire->beginTransmission(FRAM_SLAVE_ID_);
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_wire->write(_address << 1);
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_wire->endTransmission(false);
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int x = _wire->requestFrom(FRAM_SLAVE_ID_, (uint8_t)3);
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if (x != 3) return -1;
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uint32_t value = 0;
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value = _wire->read();
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value = value << 8;
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value |= _wire->read();
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value = value << 8;
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value |= _wire->read();
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// MANUFACTURER
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if (field == 0) return (value >> 12) & 0xFF;
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// PRODUCT ID
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if (field == 1) return value & 0x0FFF;
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// DENSITY
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// 3 => MB85RC64
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// 5 => MB85RC256
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// 6 => MB85RC512
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// 7 => MB85RC1M
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if (field == 2) return (value >> 8) & 0x0F;
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return 0;
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}
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void FRAM::_writeBlock(uint16_t memaddr, uint8_t * obj, uint8_t size)
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{
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_wire->beginTransmission(_address);
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_wire->write((uint8_t) (memaddr >> 8));
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_wire->write((uint8_t) (memaddr & 0xFF));
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uint8_t * p = obj;
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for (uint8_t i = size; i > 0; i--)
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{
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_wire->write(*p++);
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}
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_wire->endTransmission();
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}
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void FRAM::_readBlock(uint16_t memaddr, uint8_t * obj, uint8_t size)
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{
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_wire->beginTransmission(_address);
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_wire->write((uint8_t) (memaddr >> 8));
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_wire->write((uint8_t) (memaddr & 0xFF));
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_wire->endTransmission();
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_wire->requestFrom(_address, size);
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uint8_t * p = obj;
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for (uint8_t i = size; i > 0; i--)
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{
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*p++ = _wire->read();
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}
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}
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/////////////////////////////////////////////////////////////////
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//
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// FRAM32 PUBLIC
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//
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FRAM32::FRAM32(TwoWire *wire):FRAM(wire)
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{
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}
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void FRAM32::write8(uint32_t memaddr, uint8_t value)
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{
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uint8_t val = value;
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_writeBlock(memaddr, (uint8_t *)&val, sizeof(uint8_t));
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}
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void FRAM32::write16(uint32_t memaddr, uint16_t value)
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{
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uint16_t val = value;
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_writeBlock(memaddr, (uint8_t *)&val, sizeof(uint16_t));
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}
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void FRAM32::write32(uint32_t memaddr, uint32_t value)
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{
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uint32_t val = value;
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_writeBlock(memaddr, (uint8_t *)&val, sizeof(uint32_t));
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}
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void FRAM32::writeFloat(uint32_t memaddr, float value)
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{
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float val = value;
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_writeBlock(memaddr, (uint8_t *)&val, sizeof(float));
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}
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void FRAM32::writeDouble(uint32_t memaddr, double value)
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{
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double val = value;
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_writeBlock(memaddr, (uint8_t *)&val, sizeof(double));
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}
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void FRAM32::write(uint32_t memaddr, uint8_t * obj, uint16_t size)
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{
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const int blocksize = 24;
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uint8_t * p = obj;
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while (size >= blocksize)
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{
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_writeBlock(memaddr, p, blocksize);
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memaddr += blocksize;
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p += blocksize;
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size -= blocksize;
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}
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// remaining
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if (size > 0)
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{
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_writeBlock(memaddr, p, size);
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}
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}
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uint8_t FRAM32::read8(uint32_t memaddr)
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{
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uint8_t val;
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_readBlock(memaddr, (uint8_t *)&val, sizeof(uint8_t));
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return val;
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}
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uint16_t FRAM32::read16(uint32_t memaddr)
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{
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uint16_t val;
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_readBlock(memaddr, (uint8_t *)&val, sizeof(uint16_t));
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return val;
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}
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uint32_t FRAM32::read32(uint32_t memaddr)
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{
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uint32_t val;
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_readBlock(memaddr, (uint8_t *)&val, sizeof(uint32_t));
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return val;
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}
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float FRAM32::readFloat(uint32_t memaddr)
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{
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float val;
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_readBlock(memaddr, (uint8_t *)&val, sizeof(float));
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return val;
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}
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double FRAM32::readDouble(uint32_t memaddr)
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{
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double val;
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_readBlock(memaddr, (uint8_t *)&val, sizeof(double));
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return val;
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}
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void FRAM32::read(uint32_t memaddr, uint8_t * obj, uint16_t size)
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{
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const uint8_t blocksize = 24;
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uint8_t * p = obj;
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while (size >= blocksize)
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{
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_readBlock(memaddr, p, blocksize);
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memaddr += blocksize;
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p += blocksize;
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size -= blocksize;
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}
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// remainder
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if (size > 0)
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{
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_readBlock(memaddr, p, size);
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}
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}
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template <class T> uint32_t FRAM32::writeObject(uint32_t memaddr, T &obj)
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{
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write(memaddr, (uint8_t *) &obj, sizeof(obj));
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return memaddr + sizeof(obj);
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};
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template <class T> uint32_t FRAM32::readObject(uint32_t memaddr, T &obj)
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{
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read(memaddr, (uint8_t *) &obj, sizeof(obj));
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return memaddr + sizeof(obj);
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}
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uint32_t FRAM32::clear(uint8_t value)
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{
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uint8_t buf[16];
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for (uint8_t i = 0; i < 16; i++) buf[i] = value;
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uint32_t start = 0;
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uint32_t end = _sizeBytes;
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for (uint32_t addr = start; addr < end; addr += 16)
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{
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_writeBlock(addr, buf, 16);
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}
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return end - start;
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}
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///////////////////////////////////////////////////////////
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//
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// FRAM32 PROTECTED
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//
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void FRAM32::_writeBlock(uint32_t memaddr, uint8_t * obj, uint8_t size)
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{
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uint8_t _addr = _address;
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if (memaddr & 0x00010000) _addr += 0x01;
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_wire->beginTransmission(_addr);
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_wire->write((uint8_t) (memaddr >> 8));
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_wire->write((uint8_t) (memaddr & 0xFF));
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uint8_t * p = obj;
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for (uint8_t i = size; i > 0; i--)
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{
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_wire->write(*p++);
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}
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_wire->endTransmission();
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}
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void FRAM32::_readBlock(uint32_t memaddr, uint8_t * obj, uint8_t size)
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{
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uint8_t _addr = _address;
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if (memaddr & 0x00010000) _addr += 0x01;
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_wire->beginTransmission(_address);
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_wire->write((uint8_t) (memaddr >> 8));
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_wire->write((uint8_t) (memaddr & 0xFF));
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_wire->endTransmission();
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_wire->requestFrom(_addr, size);
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uint8_t * p = obj;
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for (uint8_t i = size; i > 0; i--)
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{
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*p++ = _wire->read();
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}
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}
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// -- END OF FILE --
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