cs_MicroappStorage.h

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#pragma once
 
#include <ble/cs_Nordic.h>  // TODO: don't use nrf_fstorage_evt_t in header.
#include <events/cs_EventListener.h>
#include <protocol/cs_MicroappPackets.h>
 
constexpr uint8_t MICROAPP_STORAGE_BUF_SIZE = 32;
 
class MicroappStorage {
public:
    static MicroappStorage& getInstance() {
        static MicroappStorage instance;
        return instance;
    }
 
    cs_ret_code_t init();
 
    void getAppHeader(uint8_t appIndex, microapp_binary_header_t& header);
 
    uint32_t getStartInstructionAddress(uint8_t appIndex);
 
    bool isErased(uint8_t appIndex);
 
    cs_ret_code_t erase(uint8_t appIndex);
 
    cs_ret_code_t writeChunk(uint8_t appIndex, uint16_t offset, const uint8_t* data, uint16_t size);
 
    cs_ret_code_t validateApp(uint8_t appIndex);
 
    void printHeader(uint8_t logLevel, microapp_binary_header_t& header);
 
    void handleFileStorageEvent(nrf_fstorage_evt_t* evt);
 
private:
    MicroappStorage();
    MicroappStorage(MicroappStorage const&) = delete;
    void operator=(MicroappStorage const&)  = delete;
 
    bool _writing                           = false;
 
    __attribute__((aligned(4))) uint8_t _writeBuffer[MICROAPP_STORAGE_BUF_SIZE];
 
    const uint8_t* _chunkData   = nullptr;
    uint16_t _chunkSize         = 0;
    uint16_t _chunkWritten      = 0;
    uint32_t _chunkFlashAddress = 0;
 
    cs_ret_code_t writeNextChunkPart();
 
    cs_ret_code_t write(uint32_t flashAddress, const uint8_t* data, uint16_t size);
 
    void onFlashWritten(cs_ret_code_t retCode);
 
    void resetChunkVars();
 
    bool isErased(uint32_t flashAddress, uint16_t size);
};