bootloader.h

#pragma once

#include <stddef.h>
#include <stdint.h>
#include "boot_data.h"
#include "boot_config.h"

extern unsigned long _stext;  // start text == program
extern unsigned long _etext;  // end program
extern unsigned long _sdata;  // begin initiated data
extern unsigned long _edata;  // end initiated data
extern unsigned long _sbss;   // begin uninitiated data
extern unsigned long _ebss;   // end uninitiated data
extern unsigned long _estack; // top of the stack
extern unsigned long _nvmStart;
extern unsigned long _nvmEnd;

namespace Bootloader
{

    struct AppEntryPoint
    {
        bool operator==(const AppEntryPoint &rhs)
        {
            return appStackPointer == rhs.appStackPointer && appEntryAddr == rhs.appEntryAddr;
        }
        uint32_t version;
        uint32_t appStackPointer;
        uint32_t appEntryAddr;
        uint32_t reserved;
    };

    class BootloaderApp
    {
        volatile bool _done = false;
        volatile bool _connected = false;
        BootData _bootdata;
        uint16_t _pageData[PageBufferSize / 2];

    public:
        BootloaderApp();
        void Reset();
        void Connected() { _connected = true; }
        bool ReplaceAndStoreAppEntryPoint(uint16_t *data);
        void InitBootData();
        bool WriteFlash(uint16_t *data, uint16_t page, uint16_t size, uint16_t offset);
        bool EraseFlash(uint32_t page);
        bool RunApplication();
        BootData &GetBootData();
        uint32_t BootStartAddress();
        uint32_t BootStartBootPage();
        bool PageFull(uint32_t page);
        bool PageEmpty(uint32_t page);
        bool IsRegionClear(uint32_t address, size_t size);
        bool FindEntryPoint(uint32_t *sp, uint32_t *entry);
        void SetVectTable(const void *table);
        bool IsDone() { return _done && !_connected; }
        void Exit() { _done = true; }
    };

} // namespace Bootloader