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