roboot/stm32/roboot_if_flash_stm32.c

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/* ================================================================================ *//* ================================================================================= */

#include <string.h>
#include "roboot.h"
#include "stm32f10x.h"


/* Delay definition */
#define UnlockTimeout            ((uint32_t)0x0000000F)

static uint32_t FlashUnlock(uint32_t page_address);
static void     FlashLock(uint32_t page_address);
static uint32_t FlashErasePage(uint32_t page_address);
static uint32_t FlashWriteData(uint32_t write_addr, const uint8_t *chunk, uint32_t chunk_len);

const ROBOOT_FLASH_Operations_T flash_oper = { FlashUnlock, FlashLock, FlashErasePage, FlashWriteData };


// -----------------------------------------------------------------------------
//  FlashUnlock
// -----------------------------------------------------------------------------
static uint32_t FlashUnlock(uint32_t page_address)
{
    (void) page_address;

    FLASH_Unlock();

    return FLASH_WaitForLastOperation(UnlockTimeout) != FLASH_COMPLETE;

} /* FlashUnlock */


// -----------------------------------------------------------------------------
//  FlashLock
// -----------------------------------------------------------------------------
static void FlashLock(uint32_t page_address)
{
    (void) page_address;

    FLASH_Lock();

} /* FlashLock */


// -----------------------------------------------------------------------------
//  FlashErasePage
// -----------------------------------------------------------------------------
static uint32_t FlashErasePage(uint32_t page_address)
{
    return FLASH_ErasePage(page_address) != FLASH_COMPLETE;

} /* FlashErasePage */


// -----------------------------------------------------------------------------
//  FlashWriteData
// -----------------------------------------------------------------------------
static uint32_t FlashWriteData(uint32_t write_addr, const uint8_t *chunk, uint32_t chunk_len)
{
    uint16_t *data;
    uint32_t data_len;
    uint32_t prg_addr;

    data = (uint16_t*)chunk;
    data_len = (chunk_len + 1U) / 2U;
    prg_addr = write_addr;

    while (data_len)
    {
        if (FLASH_ProgramHalfWord(prg_addr, *data) != FLASH_COMPLETE)
        {
            return 1;
        }
        data++;
        data_len--;
        prg_addr += 2U;
    }

    return memcmp((const void*)write_addr, chunk, chunk_len);

} /* FlashWriteData */

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