mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
744 lines
15 KiB
C++
744 lines
15 KiB
C++
//
|
|
// FILE: FRAM.cpp
|
|
// AUTHOR: Rob Tillaart
|
|
// VERSION: 0.7.0
|
|
// DATE: 2018-01-24
|
|
// PURPOSE: Arduino library for I2C FRAM
|
|
// URL: https://github.com/RobTillaart/FRAM_I2C
|
|
|
|
|
|
#include "FRAM.h"
|
|
|
|
|
|
// DENSITY CODES
|
|
|
|
#define FRAM_MB85RC64 0x03
|
|
#define FRAM_MB85RC256 0x05
|
|
#define FRAM_MB85RC512 0x06
|
|
#define FRAM_MB85RC1M 0x07
|
|
|
|
|
|
// used for metadata and sleep
|
|
const uint8_t FRAM_SLAVE_ID_ = 0x7C; // == 0xF8
|
|
const uint8_t FRAM_SLEEP_CMD = 0x86; //
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FRAM PUBLIC
|
|
//
|
|
FRAM::FRAM(TwoWire *wire)
|
|
{
|
|
_wire = wire;
|
|
_address = 0x50;
|
|
_writeProtectPin = -1;
|
|
_sizeBytes = 0;
|
|
}
|
|
|
|
|
|
int FRAM::begin(const uint8_t address,
|
|
const int8_t writeProtectPin)
|
|
{
|
|
if ((address < 0x50) || (address > 0x57)) return FRAM_ERROR_ADDR;
|
|
|
|
_address = address;
|
|
if (writeProtectPin > -1)
|
|
{
|
|
_writeProtectPin = writeProtectPin;
|
|
pinMode(_writeProtectPin, OUTPUT);
|
|
}
|
|
if (! isConnected()) return FRAM_ERROR_CONNECT;
|
|
getSize();
|
|
return FRAM_OK;
|
|
}
|
|
|
|
|
|
bool FRAM::isConnected()
|
|
{
|
|
_wire->beginTransmission(_address);
|
|
return (_wire->endTransmission() == 0);
|
|
}
|
|
|
|
|
|
void FRAM::write8(uint16_t memAddr, uint8_t value)
|
|
{
|
|
uint8_t val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(uint8_t));
|
|
}
|
|
|
|
|
|
void FRAM::write16(uint16_t memAddr, uint16_t value)
|
|
{
|
|
uint16_t val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(uint16_t));
|
|
}
|
|
|
|
|
|
void FRAM::write32(uint16_t memAddr, uint32_t value)
|
|
{
|
|
uint32_t val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(uint32_t));
|
|
}
|
|
|
|
|
|
void FRAM::write64(uint16_t memAddr, uint64_t value)
|
|
{
|
|
uint64_t val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(uint64_t));
|
|
}
|
|
|
|
|
|
void FRAM::writeFloat(uint16_t memAddr, float value)
|
|
{
|
|
float val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(float));
|
|
}
|
|
|
|
|
|
void FRAM::writeDouble(uint16_t memAddr, double value)
|
|
{
|
|
double val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(double));
|
|
}
|
|
|
|
|
|
void FRAM::write(uint16_t memAddr, uint8_t * obj, uint16_t size)
|
|
{
|
|
const int blocksize = 24;
|
|
uint8_t * p = obj;
|
|
while (size >= blocksize)
|
|
{
|
|
_writeBlock(memAddr, p, blocksize);
|
|
memAddr += blocksize;
|
|
p += blocksize;
|
|
size -= blocksize;
|
|
}
|
|
// remaining
|
|
if (size > 0)
|
|
{
|
|
_writeBlock(memAddr, p, size);
|
|
}
|
|
}
|
|
|
|
|
|
uint8_t FRAM::read8(uint16_t memAddr)
|
|
{
|
|
uint8_t val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(uint8_t));
|
|
return val;
|
|
}
|
|
|
|
|
|
uint16_t FRAM::read16(uint16_t memAddr)
|
|
{
|
|
uint16_t val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(uint16_t));
|
|
return val;
|
|
}
|
|
|
|
|
|
uint32_t FRAM::read32(uint16_t memAddr)
|
|
{
|
|
uint32_t val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(uint32_t));
|
|
return val;
|
|
}
|
|
|
|
|
|
uint64_t FRAM::read64(uint16_t memAddr)
|
|
{
|
|
uint64_t val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(uint64_t));
|
|
return val;
|
|
}
|
|
|
|
|
|
float FRAM::readFloat(uint16_t memAddr)
|
|
{
|
|
float val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(float));
|
|
return val;
|
|
}
|
|
|
|
|
|
double FRAM::readDouble(uint16_t memAddr)
|
|
{
|
|
double val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(double));
|
|
return val;
|
|
}
|
|
|
|
|
|
void FRAM::read(uint16_t memAddr, uint8_t * obj, uint16_t size)
|
|
{
|
|
const uint8_t blocksize = 24;
|
|
uint8_t * p = obj;
|
|
while (size >= blocksize)
|
|
{
|
|
_readBlock(memAddr, p, blocksize);
|
|
memAddr += blocksize;
|
|
p += blocksize;
|
|
size -= blocksize;
|
|
}
|
|
// remainder
|
|
if (size > 0)
|
|
{
|
|
_readBlock(memAddr, p, size);
|
|
}
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
int32_t FRAM::readUntil(uint16_t memAddr, char * buffer, uint16_t bufferLength, char separator)
|
|
{
|
|
// read and fill the buffer at once.
|
|
read(memAddr, (uint8_t *)buffer, bufferLength);
|
|
for (uint16_t length = 0; length < bufferLength; length++)
|
|
{
|
|
if (buffer[length] == separator)
|
|
{
|
|
buffer[length] = 0; // replace separator => \0 EndChar
|
|
return length;
|
|
}
|
|
}
|
|
// entry does not fit in given buffer.
|
|
return (int32_t)-1;
|
|
}
|
|
|
|
|
|
int32_t FRAM::readLine(uint16_t memAddr, char * buffer, uint16_t bufferLength)
|
|
{
|
|
// read and fill the buffer at once.
|
|
read(memAddr, (uint8_t *)buffer, bufferLength);
|
|
for (uint16_t length = 0; length < bufferLength-1; length++)
|
|
{
|
|
if (buffer[length] == '\n')
|
|
{
|
|
buffer[length + 1] = 0; // add \0 EndChar after '\n'
|
|
return length + 1;
|
|
}
|
|
}
|
|
// entry does not fit in given buffer.
|
|
return (int32_t)-1;
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
bool FRAM::setWriteProtect(bool b)
|
|
{
|
|
if (_writeProtectPin < 0) return false;
|
|
digitalWrite(_writeProtectPin, b ? HIGH : LOW);
|
|
return true;
|
|
}
|
|
|
|
|
|
bool FRAM::getWriteProtect()
|
|
{
|
|
if (_writeProtectPin < 0) return false;
|
|
return (digitalRead(_writeProtectPin) == HIGH);
|
|
}
|
|
|
|
|
|
uint16_t FRAM::getManufacturerID()
|
|
{
|
|
uint32_t value = _getMetaData();
|
|
return (value >> 12) & 0x0FFF;
|
|
}
|
|
|
|
|
|
uint16_t FRAM::getProductID()
|
|
{
|
|
uint32_t value = _getMetaData();
|
|
return value & 0x0FFF;
|
|
}
|
|
|
|
|
|
// DENSITY
|
|
// Fujitsu data sheet
|
|
// 3 => MB85RC64 = 64 Kbit.
|
|
// 5 => MB85RC256
|
|
// 6 => MB85RC512
|
|
// 7 => MB85RC1M
|
|
// NOTE: returns the size in kiloBYTE (0 is read error)
|
|
uint16_t FRAM::getSize()
|
|
{
|
|
uint32_t value = _getMetaData();
|
|
if (value == 0xFFFFFFFF) return 0;
|
|
|
|
uint16_t density = (value >> 8) & 0x0F;
|
|
uint16_t size = (1UL << density);
|
|
_sizeBytes = size * 1024UL;
|
|
return size;
|
|
}
|
|
|
|
|
|
uint32_t FRAM::getSizeBytes()
|
|
{
|
|
return _sizeBytes;
|
|
}
|
|
|
|
|
|
// override to be used when getSize() fails == 0
|
|
void FRAM::setSizeBytes(uint32_t value)
|
|
{
|
|
_sizeBytes = value;
|
|
}
|
|
|
|
|
|
uint32_t FRAM::clear(uint8_t value)
|
|
{
|
|
uint8_t buffer[16];
|
|
for (uint8_t i = 0; i < 16; i++) buffer[i] = value;
|
|
uint32_t start = 0;
|
|
uint32_t end = _sizeBytes;
|
|
for (uint32_t address = start; address < end; address += 16)
|
|
{
|
|
_writeBlock(address, buffer, 16);
|
|
}
|
|
return end - start;
|
|
}
|
|
|
|
|
|
// EXPERIMENTAL - to be confirmed
|
|
// page 12 datasheet
|
|
// command = S 0xF8 A address A S 86 A P (A = Ack from slave )
|
|
void FRAM::sleep()
|
|
{
|
|
_wire->beginTransmission(FRAM_SLAVE_ID_); // S 0xF8
|
|
_wire->write(_address << 1); // address << 1
|
|
_wire->endTransmission(false); // no stoP
|
|
_wire->beginTransmission(FRAM_SLEEP_CMD >> 1); // S 0x86
|
|
_wire->endTransmission(true); // stoP
|
|
}
|
|
|
|
|
|
// page 12 datasheet trec <= 400us
|
|
bool FRAM::wakeup(uint32_t timeRecover)
|
|
{
|
|
bool b = isConnected(); // wakeup
|
|
if (timeRecover == 0) return b;
|
|
// wait recovery time
|
|
delayMicroseconds(timeRecover);
|
|
return isConnected(); // check recovery OK
|
|
}
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FRAM PROTECTED
|
|
//
|
|
|
|
// metadata is packed as [MMMMMMMM][MMMMDDDD][PPPPPPPP]
|
|
// M = manufacturerID
|
|
// D = density => memory size = 2^D KB
|
|
// P = product ID (together with D)
|
|
// P part might be proprietary
|
|
uint32_t FRAM::_getMetaData()
|
|
{
|
|
_wire->beginTransmission(FRAM_SLAVE_ID_);
|
|
_wire->write(_address << 1);
|
|
_wire->endTransmission(false);
|
|
int x = _wire->requestFrom(FRAM_SLAVE_ID_, (uint8_t)3);
|
|
if (x != 3) return 0xFFFFFFFF;
|
|
|
|
uint32_t value = 0;
|
|
value = _wire->read();
|
|
value = value << 8;
|
|
value |= _wire->read();
|
|
value = value << 8;
|
|
value |= _wire->read();
|
|
|
|
return value;
|
|
}
|
|
|
|
|
|
void FRAM::_writeBlock(uint16_t memAddr, uint8_t * obj, uint8_t size)
|
|
{
|
|
_wire->beginTransmission(_address);
|
|
_wire->write((uint8_t) (memAddr >> 8));
|
|
_wire->write((uint8_t) (memAddr & 0xFF));
|
|
uint8_t * p = obj;
|
|
for (uint8_t i = size; i > 0; i--)
|
|
{
|
|
_wire->write(*p++);
|
|
}
|
|
_wire->endTransmission();
|
|
}
|
|
|
|
|
|
void FRAM::_readBlock(uint16_t memAddr, uint8_t * obj, uint8_t size)
|
|
{
|
|
_wire->beginTransmission(_address);
|
|
_wire->write((uint8_t) (memAddr >> 8));
|
|
_wire->write((uint8_t) (memAddr & 0xFF));
|
|
_wire->endTransmission();
|
|
_wire->requestFrom(_address, size);
|
|
uint8_t * p = obj;
|
|
for (uint8_t i = size; i > 0; i--)
|
|
{
|
|
*p++ = _wire->read();
|
|
}
|
|
}
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FRAM32 PUBLIC
|
|
//
|
|
|
|
FRAM32::FRAM32(TwoWire *wire) : FRAM(wire)
|
|
{
|
|
}
|
|
|
|
|
|
void FRAM32::write8(uint32_t memAddr, uint8_t value)
|
|
{
|
|
uint8_t val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(uint8_t));
|
|
}
|
|
|
|
|
|
void FRAM32::write16(uint32_t memAddr, uint16_t value)
|
|
{
|
|
uint16_t val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(uint16_t));
|
|
}
|
|
|
|
|
|
void FRAM32::write32(uint32_t memAddr, uint32_t value)
|
|
{
|
|
uint32_t val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(uint32_t));
|
|
}
|
|
|
|
|
|
void FRAM32::write64(uint32_t memAddr, uint64_t value)
|
|
{
|
|
uint64_t val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(uint64_t));
|
|
}
|
|
|
|
|
|
void FRAM32::writeFloat(uint32_t memAddr, float value)
|
|
{
|
|
float val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(float));
|
|
}
|
|
|
|
|
|
void FRAM32::writeDouble(uint32_t memAddr, double value)
|
|
{
|
|
double val = value;
|
|
_writeBlock(memAddr, (uint8_t *)&val, sizeof(double));
|
|
}
|
|
|
|
|
|
void FRAM32::write(uint32_t memAddr, uint8_t * obj, uint16_t size)
|
|
{
|
|
const int blocksize = 24;
|
|
uint8_t * p = obj;
|
|
while (size >= blocksize)
|
|
{
|
|
_writeBlock(memAddr, p, blocksize);
|
|
memAddr += blocksize;
|
|
p += blocksize;
|
|
size -= blocksize;
|
|
}
|
|
// remaining
|
|
if (size > 0)
|
|
{
|
|
_writeBlock(memAddr, p, size);
|
|
}
|
|
}
|
|
|
|
|
|
uint8_t FRAM32::read8(uint32_t memAddr)
|
|
{
|
|
uint8_t val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(uint8_t));
|
|
return val;
|
|
}
|
|
|
|
|
|
uint16_t FRAM32::read16(uint32_t memAddr)
|
|
{
|
|
uint16_t val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(uint16_t));
|
|
return val;
|
|
}
|
|
|
|
|
|
uint32_t FRAM32::read32(uint32_t memAddr)
|
|
{
|
|
uint32_t val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(uint32_t));
|
|
return val;
|
|
}
|
|
|
|
|
|
uint64_t FRAM32::read64(uint32_t memAddr)
|
|
{
|
|
uint64_t val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(uint64_t));
|
|
return val;
|
|
}
|
|
|
|
|
|
float FRAM32::readFloat(uint32_t memAddr)
|
|
{
|
|
float val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(float));
|
|
return val;
|
|
}
|
|
|
|
|
|
double FRAM32::readDouble(uint32_t memAddr)
|
|
{
|
|
double val;
|
|
_readBlock(memAddr, (uint8_t *)&val, sizeof(double));
|
|
return val;
|
|
}
|
|
|
|
|
|
void FRAM32::read(uint32_t memAddr, uint8_t * obj, uint16_t size)
|
|
{
|
|
const uint8_t blocksize = 24;
|
|
uint8_t * p = obj;
|
|
while (size >= blocksize)
|
|
{
|
|
_readBlock(memAddr, p, blocksize);
|
|
memAddr += blocksize;
|
|
p += blocksize;
|
|
size -= blocksize;
|
|
}
|
|
// remainder
|
|
if (size > 0)
|
|
{
|
|
_readBlock(memAddr, p, size);
|
|
}
|
|
}
|
|
|
|
|
|
int32_t FRAM32::readUntil(uint32_t memAddr, char * buffer, uint16_t bufferLength, char separator)
|
|
{
|
|
// read and fill the buffer at once.
|
|
read(memAddr, (uint8_t *)buffer, bufferLength);
|
|
for (uint16_t length = 0; length < bufferLength; length++)
|
|
{
|
|
if (buffer[length] == separator)
|
|
{
|
|
buffer[length] = 0; // replace separator => \0 EndChar
|
|
return length;
|
|
}
|
|
}
|
|
// entry does not fit in given buffer.
|
|
return (int32_t)-1;
|
|
}
|
|
|
|
|
|
int32_t FRAM32::readLine(uint32_t memAddr, char * buffer, uint16_t bufferLength)
|
|
{
|
|
// read and fill the buffer at once.
|
|
read(memAddr, (uint8_t *)buffer, bufferLength);
|
|
for (uint16_t length = 0; length < bufferLength-1; length++)
|
|
{
|
|
if (buffer[length] == '\n')
|
|
{
|
|
buffer[length + 1] = 0; // add \0 EndChar after '\n'
|
|
return length + 1;
|
|
}
|
|
}
|
|
// entry does not fit in given buffer.
|
|
return (int32_t)-1;
|
|
}
|
|
|
|
|
|
uint32_t FRAM32::clear(uint8_t value)
|
|
{
|
|
uint8_t buffer[16];
|
|
for (uint8_t i = 0; i < 16; i++) buffer[i] = value;
|
|
uint32_t start = 0;
|
|
uint32_t end = _sizeBytes;
|
|
for (uint32_t addr = start; addr < end; addr += 16)
|
|
{
|
|
_writeBlock(addr, buffer, 16);
|
|
}
|
|
return end - start;
|
|
}
|
|
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FRAM32 PROTECTED
|
|
//
|
|
void FRAM32::_writeBlock(uint32_t memAddr, uint8_t * obj, uint8_t size)
|
|
{
|
|
uint8_t _addr = _address;
|
|
if (memAddr & 0x00010000) _addr += 0x01;
|
|
|
|
_wire->beginTransmission(_addr);
|
|
_wire->write((uint8_t) (memAddr >> 8));
|
|
_wire->write((uint8_t) (memAddr & 0xFF));
|
|
uint8_t * p = obj;
|
|
for (uint8_t i = size; i > 0; i--)
|
|
{
|
|
_wire->write(*p++);
|
|
}
|
|
_wire->endTransmission();
|
|
}
|
|
|
|
|
|
void FRAM32::_readBlock(uint32_t memAddr, uint8_t * obj, uint8_t size)
|
|
{
|
|
uint8_t _addr = _address;
|
|
if (memAddr & 0x00010000) _addr += 0x01;
|
|
|
|
_wire->beginTransmission(_address);
|
|
_wire->write((uint8_t) (memAddr >> 8));
|
|
_wire->write((uint8_t) (memAddr & 0xFF));
|
|
_wire->endTransmission();
|
|
_wire->requestFrom(_addr, size);
|
|
uint8_t * p = obj;
|
|
for (uint8_t i = size; i > 0; i--)
|
|
{
|
|
*p++ = _wire->read();
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FRAM11
|
|
//
|
|
FRAM11::FRAM11(TwoWire *wire) : FRAM(wire)
|
|
{
|
|
_sizeBytes = 2048;
|
|
}
|
|
|
|
|
|
int FRAM11::begin(const uint8_t address, const int8_t writeProtectPin)
|
|
{
|
|
int rv = FRAM::begin(address, writeProtectPin);
|
|
_sizeBytes = 2048;
|
|
return rv;
|
|
}
|
|
|
|
|
|
uint16_t FRAM11::getSize()
|
|
{
|
|
return _sizeBytes / 1024;
|
|
}
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FRAM11 PROTECTED
|
|
//
|
|
void FRAM11::_writeBlock(uint16_t memAddr, uint8_t * obj, uint8_t size)
|
|
{
|
|
// Device uses Address Pages
|
|
uint8_t DeviceAddrWithPageBits = _address | ((memAddr & 0x0700) >> 8);
|
|
_wire->beginTransmission(DeviceAddrWithPageBits);
|
|
_wire->write((uint8_t) (memAddr & 0xFF));
|
|
|
|
uint8_t * p = obj;
|
|
for (uint8_t i = size; i > 0; i--)
|
|
{
|
|
_wire->write(*p++);
|
|
}
|
|
_wire->endTransmission();
|
|
}
|
|
|
|
|
|
void FRAM11::_readBlock(uint16_t memAddr, uint8_t * obj, uint8_t size)
|
|
{
|
|
// Device uses Address Pages
|
|
uint8_t DeviceAddrWithPageBits = _address | ((memAddr & 0x0700) >> 8);
|
|
_wire->beginTransmission(DeviceAddrWithPageBits);
|
|
_wire->write((uint8_t) (memAddr & 0xFF));
|
|
_wire->endTransmission();
|
|
_wire->requestFrom(DeviceAddrWithPageBits, size);
|
|
|
|
uint8_t * p = obj;
|
|
for (uint8_t i = size; i > 0; i--)
|
|
{
|
|
*p++ = _wire->read();
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FRAM9
|
|
//
|
|
FRAM9::FRAM9(TwoWire *wire) : FRAM(wire)
|
|
{
|
|
_sizeBytes = 512;
|
|
}
|
|
|
|
|
|
int FRAM9::begin(const uint8_t address, const int8_t writeProtectPin)
|
|
{
|
|
int rv = FRAM::begin(address, writeProtectPin);
|
|
_sizeBytes = 512;
|
|
return rv;
|
|
}
|
|
|
|
|
|
uint16_t FRAM9::getSize()
|
|
{
|
|
return _sizeBytes / 1024; // == 0.
|
|
}
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// FRAM9 PROTECTED
|
|
//
|
|
void FRAM9::_writeBlock(uint16_t memAddr, uint8_t * obj, uint8_t size)
|
|
{
|
|
// Device uses Address Pages
|
|
uint8_t DeviceAddrWithPageBits = _address | ((memAddr & 0x0100) >> 8);
|
|
_wire->beginTransmission(DeviceAddrWithPageBits);
|
|
_wire->write((uint8_t) (memAddr & 0xFF));
|
|
|
|
uint8_t * p = obj;
|
|
for (uint8_t i = size; i > 0; i--)
|
|
{
|
|
_wire->write(*p++);
|
|
}
|
|
_wire->endTransmission();
|
|
}
|
|
|
|
|
|
void FRAM9::_readBlock(uint16_t memAddr, uint8_t * obj, uint8_t size)
|
|
{
|
|
// Device uses Address Pages
|
|
uint8_t DeviceAddrWithPageBits = _address | ((memAddr & 0x0100) >> 8);
|
|
_wire->beginTransmission(DeviceAddrWithPageBits);
|
|
_wire->write((uint8_t) (memAddr & 0xFF));
|
|
_wire->endTransmission();
|
|
_wire->requestFrom(DeviceAddrWithPageBits, size);
|
|
|
|
uint8_t * p = obj;
|
|
for (uint8_t i = size; i > 0; i--)
|
|
{
|
|
*p++ = _wire->read();
|
|
}
|
|
}
|
|
|
|
|
|
// -- END OF FILE --
|
|
|