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/*
* NonVolatileMemory.cpp
*
* Created on: 24 Aug 2020
* Author: David
*/
#include "NonVolatileMemory.h"
#if SAM4E || SAM4S || SAME70
# include <Cache.h>
# include <Flash.h>
# include <RTOSIface/RTOSIface.h>
#endif
NonVolatileMemory::NonVolatileMemory() noexcept : state(NvmState::notRead)
{
}
void NonVolatileMemory::EnsureRead() noexcept
{
if (state == NvmState::notRead)
{
#if SAME5x
memcpyu32(reinterpret_cast<uint32_t*>(&buffer), reinterpret_cast<const uint32_t *>(SEEPROM_ADDR), sizeof(buffer)/sizeof(uint32_t));
#elif defined(__LPC17xx__)
# error //TODO
#elif SAM4E || SAM4S || SAME70
const bool cacheEnabled = Cache::Disable();
Flash::ReadUserSignature(reinterpret_cast<uint32_t*>(&buffer), sizeof(buffer)/sizeof(uint32_t));
if (cacheEnabled)
{
Cache::Enable();
}
#else
# error Unsupported processor
#endif
if (buffer.magic != NVM::MagicValue)
{
// debugPrintf("Invalid user area\n");
memset(&buffer, 0xFF, sizeof(buffer));
buffer.magic = NVM::MagicValue;
state = NvmState::eraseAndWriteNeeded;
}
else
{
state = NvmState::clean;
// debugPrintf("user area valid\n");
}
}
}
void NonVolatileMemory::EnsureWritten() noexcept
{
#if SAME5x
if (state >= NvmState::writeNeeded)
{
// No need to erase on the SAME5x because the EEPROM emulation manages it
while (NVMCTRL->SEESTAT.bit.BUSY) { }
memcpyu32(reinterpret_cast<uint32_t*>(SEEPROM_ADDR), reinterpret_cast<const uint32_t*>(&buffer), sizeof(buffer)/sizeof(uint32_t));
state = NvmState::clean;
while (NVMCTRL->SEESTAT.bit.BUSY) { }
}
#else
if (state == NvmState::eraseAndWriteNeeded)
{
// Erase the page
# if SAM4E || SAM4S || SAME70
Flash::EraseUserSignature();
# elif defined(__LPC17xx__)
LPC_EraseSoftwareResetDataSlots(); // erase the last flash sector
# endif
state = NvmState::writeNeeded;
}
if (state == NvmState::writeNeeded)
{
# if SAM4E || SAM4S || SAME70
const bool cacheEnabled = Cache::Disable();
Flash::WriteUserSignature(reinterpret_cast<const uint32_t*>(&buffer));
if (cacheEnabled)
{
Cache::Enable();
}
# elif defined(__LPC17xx__)
LPC_WriteSoftwareResetData(slot, buffer, sizeof(buffer));
# else
# error Unsupported processor
# endif
state = NvmState::clean;
}
#endif
}
SoftwareResetData* NonVolatileMemory::GetLastWrittenResetData(unsigned int &slot) noexcept
{
EnsureRead();
for (unsigned int i = NumberOfResetDataSlots; i != 0; )
{
--i;
if (buffer.resetData[i].IsValid())
{
slot = i;
return &buffer.resetData[i];
}
}
return nullptr;
}
SoftwareResetData* NonVolatileMemory::AllocateResetDataSlot() noexcept
{
EnsureRead();
for (unsigned int i = 0; i < NumberOfResetDataSlots; ++i)
{
if (buffer.resetData[i].IsVacant())
{
if (state == NvmState::clean) // need this test because state may already be EraseAndWriteNeeded after EnsureRead
{
state = NvmState::writeNeeded; // assume the caller will write to the allocated slot
}
return &buffer.resetData[i];
}
}
// All slots are full, so clear them out and start again
for (unsigned int i = 0; i < NumberOfResetDataSlots; ++i)
{
buffer.resetData[i].Clear();
}
state = NvmState::eraseAndWriteNeeded;
return &buffer.resetData[0];
}
int8_t NonVolatileMemory::GetThermistorLowCalibration(unsigned int inputNumber) noexcept
{
return GetThermistorCalibration(inputNumber, buffer.thermistorLowCalibration);
}
int8_t NonVolatileMemory::GetThermistorHighCalibration(unsigned int inputNumber) noexcept
{
return GetThermistorCalibration(inputNumber, buffer.thermistorHighCalibration);
}
void NonVolatileMemory::SetThermistorLowCalibration(unsigned int inputNumber, int8_t val) noexcept
{
SetThermistorCalibration(inputNumber, val, buffer.thermistorLowCalibration);
}
void NonVolatileMemory::SetThermistorHighCalibration(unsigned int inputNumber, int8_t val) noexcept
{
SetThermistorCalibration(inputNumber, val, buffer.thermistorHighCalibration);
}
int8_t NonVolatileMemory::GetThermistorCalibration(unsigned int inputNumber, uint8_t *calibArray) noexcept
{
EnsureRead();
return (inputNumber >= MaxCalibratedThermistors || calibArray[inputNumber] == 0xFF) ? 0 : (int)calibArray[inputNumber] - (int)0x7F;
}
void NonVolatileMemory::SetThermistorCalibration(unsigned int inputNumber, int8_t val, uint8_t *calibArray) noexcept
{
if (inputNumber < MaxCalibratedThermistors)
{
EnsureRead();
const uint8_t oldVal = calibArray[inputNumber];
const uint8_t newVal = val + 0x7F;
if (oldVal != newVal)
{
// If we are only changing 1 bits to 0 then we don't need to erase
calibArray[inputNumber] = newVal;
if ((newVal & ~oldVal) != 0)
{
state = NvmState::eraseAndWriteNeeded;
}
else if (state == NvmState::clean)
{
state = NvmState::writeNeeded;
}
}
}
}
// End
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