644431cbc4
The external SPI flash is implemented as a 4MB on the local filesystem. This allows the FS (littleFS) and settings to work properly. Remove the simulated `FS.h` and `FS.cpp`, because we can now use the files from InfiniTime directly as the heavy lifting is done in the simulated `SpiNorFlash.h` and cpp files. `SpiNorFlash.h` provides read and write functions with `uint8_t` buffer, but `fs::fstream` expects `char` buffer. Use `reinterpret_cast` and check if by any chance the `char` type on a platform is implemented with more than one byte. Then the `reinterpret_cast<char *>(buffer)` would change the meaning of the `size` parameter, which could lead to garbage data. Co-authored-by: Reinhold Gschweicher <pyro4hell@gmail.com>
66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <fstream>
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namespace Pinetime {
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namespace Drivers {
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class Spi;
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class SpiNorFlash {
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public:
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explicit SpiNorFlash(const std::string& memoryFilePath);
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~SpiNorFlash();
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SpiNorFlash(const SpiNorFlash&) = delete;
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SpiNorFlash& operator=(const SpiNorFlash&) = delete;
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SpiNorFlash(SpiNorFlash&&) = delete;
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SpiNorFlash& operator=(SpiNorFlash&&) = delete;
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struct __attribute__((packed)) Identification {
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uint8_t manufacturer = 0;
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uint8_t type = 0;
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uint8_t density = 0;
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};
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Identification ReadIdentificaion();
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uint8_t ReadStatusRegister();
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bool WriteInProgress();
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bool WriteEnabled();
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uint8_t ReadConfigurationRegister();
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void Read(uint32_t address, uint8_t* buffer, size_t size);
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void Write(uint32_t address, const uint8_t* buffer, size_t size);
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void WriteEnable();
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void SectorErase(uint32_t sectorAddress);
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uint8_t ReadSecurityRegister();
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bool ProgramFailed();
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bool EraseFailed();
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void Init();
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void Uninit();
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void Sleep();
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void Wakeup();
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private:
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enum class Commands : uint8_t {
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PageProgram = 0x02,
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Read = 0x03,
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ReadStatusRegister = 0x05,
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WriteEnable = 0x06,
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ReadConfigurationRegister = 0x15,
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SectorErase = 0x20,
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ReadSecurityRegister = 0x2B,
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ReadIdentification = 0x9F,
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ReleaseFromDeepPowerDown = 0xAB,
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DeepPowerDown = 0xB9
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};
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static constexpr uint16_t pageSize = 256;
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static constexpr size_t memorySize {0x400000};
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const std::string& memoryFilePath;
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Identification device_id;
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std::fstream memoryFile;
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};
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}
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}
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