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/* Copyright 2021 by Don Kjer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <stdbool.h>
#include "flash_stm32.h"
uint8_t FlashBuf[MOCK_FLASH_SIZE] = {0};
static bool flash_locked = true;
FLASH_Status FLASH_ErasePage(uint32_t Page_Address) {
if (flash_locked) return FLASH_ERROR_WRP;
Page_Address -= (uintptr_t)FlashBuf;
Page_Address -= (Page_Address % FEE_PAGE_SIZE);
if (Page_Address >= MOCK_FLASH_SIZE) return FLASH_BAD_ADDRESS;
memset(&FlashBuf[Page_Address], '\xff', FEE_PAGE_SIZE);
return FLASH_COMPLETE;
}
FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data) {
if (flash_locked) return FLASH_ERROR_WRP;
Address -= (uintptr_t)FlashBuf;
if (Address >= MOCK_FLASH_SIZE) return FLASH_BAD_ADDRESS;
uint16_t oldData = *(uint16_t*)&FlashBuf[Address];
if (oldData == 0xFFFF || Data == 0) {
*(uint16_t*)&FlashBuf[Address] = Data;
return FLASH_COMPLETE;
} else {
return FLASH_ERROR_PG;
}
}
FLASH_Status FLASH_WaitForLastOperation(uint32_t Timeout) {
return FLASH_COMPLETE;
}
void FLASH_Unlock(void) {
flash_locked = false;
}
void FLASH_Lock(void) {
flash_locked = true;
}
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