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/**
*********************************************************************************
*
* @file ald_flash.c
* @brief FLASH module driver.
*
* @version V1.0
* @date 20 Nov 2017
* @author AE Team
* @note
*
* Copyright (C) Shanghai Eastsoft Microelectronics Co. Ltd. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ald_flash.h"
/** @addtogroup ES32FXXX_ALD
* @{
*/
/** @defgroup FLASH FLASH
* @brief FLASH module driver
* @{
*/
#ifdef ALD_FLASH
#if defined ( __ICCARM__ )
#define __RAMFUNC __ramfunc
#else
#define __RAMFUNC
#endif
/** @defgroup Flash_Private_Variables Flash Private Variables
* @{
*/
/* global variable*/
static op_cmd_type OP_CMD = OP_FLASH;
/**
* @}
*/
/** @defgroup Flash_Private_Functions Flash Private Functions
* @brief Flash Private functions
* @{
*/
/**
* @brief Unlock the flash.
* @retval Status, see @ref ald_status_t.
*/
__RAMFUNC static ald_status_t flash_unlock(void)
{
uint16_t i;
uint16_t op_cmd = OP_CMD;
if (READ_BIT(MSC->FLASHSR, MSC_FLASHSR_BUSY_MSK))
return ERROR;
FLASH_REG_UNLOCK();
FLASH_IAP_ENABLE();
FLASH_REQ();
for (i = 0; i < 0xFFFF; i++) {
if (READ_BIT(MSC->FLASHSR, MSC_FLASHSR_FLASHACK_MSK))
break;
}
return i == 0xFFFF ? ERROR : OK;
}
/**
* @brief Lock the flash.
* @retval Status, see @ref ald_status_t.
*/
__RAMFUNC static ald_status_t flash_lock(void)
{
uint16_t i;
uint16_t op_cmd = OP_CMD;
FLASH_REG_UNLOCK();
WRITE_REG(MSC->FLASHCR, 0x0);
for (i = 0; i < 0xFFFF; i++) {
if (!(READ_BIT(MSC->FLASHSR, MSC_FLASHSR_FLASHACK_MSK)))
break;
}
return i == 0xFFFF ? ERROR : OK;
}
/**
* @brief Erase one page.
* @param addr: The erased page's address
* @retval Status, see @ref ald_status_t.
*/
__RAMFUNC ald_status_t flash_page_erase(uint32_t addr)
{
uint32_t i;
uint16_t op_cmd = OP_CMD;
if (flash_unlock() != OK)
goto end;
if (op_cmd == OP_FLASH) {
CLEAR_BIT(MSC->FLASHADDR, MSC_FLASHADDR_IFREN_MSK);
MODIFY_REG(MSC->FLASHADDR, MSC_FLASHADDR_ADDR_MSK, FLASH_PAGE_ADDR(addr) << MSC_FLASHADDR_ADDR_POSS);
}
else {
SET_BIT(MSC->FLASHADDR, MSC_FLASHADDR_IFREN_MSK);
MODIFY_REG(MSC->FLASHADDR, MSC_FLASHADDR_ADDR_MSK, INFO_PAGE_ADDR(addr) << MSC_FLASHADDR_ADDR_POSS);
}
WRITE_REG(MSC->FLASHCMD, FLASH_CMD_PE);
for (i = 0; i < 0xFFFF; i++) {
if (READ_BIT(MSC->FLASHSR, MSC_FLASHSR_BUSY_MSK))
continue;
if (READ_BIT(MSC->FLASHSR, MSC_FLASHSR_ADDR_OV_MSK))
goto end;
if (READ_BIT(MSC->FLASHSR, MSC_FLASHSR_WRP_FLAG_MSK))
goto end;
if (READ_BIT(MSC->FLASHSR, MSC_FLASHSR_SERA_MSK))
break;
}
if (i == 0xFFFF)
goto end;
if (flash_lock() == ERROR)
goto end;
return OK;
end:
flash_lock();
return ERROR;
}
/**
* @brief Programme a word.
* @param addr: The word's address, it is must word align.
* @param data: The 8 bytes data be write.
* @param len: The number of data be write.
* @param fifo: Choose if use fifo.
* @retval Status, see @ref ald_status_t.
*/
__RAMFUNC ald_status_t flash_word_program(uint32_t addr, uint32_t *data, uint32_t len, uint32_t fifo)
{
uint16_t i = 0;
uint16_t prog_len;
uint32_t *p_data = data;
uint16_t op_cmd = OP_CMD;
if (flash_unlock() != OK)
goto end;
if (op_cmd == OP_FLASH)
CLEAR_BIT(MSC->FLASHADDR, MSC_FLASHADDR_IFREN_MSK);
else
SET_BIT(MSC->FLASHADDR, MSC_FLASHADDR_IFREN_MSK);
MODIFY_REG(MSC->FLASHADDR, MSC_FLASHADDR_ADDR_MSK, addr << MSC_FLASHADDR_ADDR_POSS);
MODIFY_REG(MSC->FLASHCR, MSC_FLASHCR_FIFOEN_MSK, fifo << MSC_FLASHCR_FIFOEN_POS);
for (prog_len = 0; prog_len < len; prog_len++) {
if (fifo) {
WRITE_REG(MSC->FLASHFIFO, p_data[0]);
WRITE_REG(MSC->FLASHFIFO, p_data[1]);
}
else {
WRITE_REG(MSC->FLASHDL, p_data[0]);
WRITE_REG(MSC->FLASHDH, p_data[1]);
WRITE_REG(MSC->FLASHCMD, FLASH_CMD_WP);
}
p_data += 2;
for (i = 0; i < 0xFFFF; i++) {
if (READ_BIT(MSC->FLASHSR, MSC_FLASHSR_BUSY_MSK))
continue;
if (READ_BIT(MSC->FLASHSR, MSC_FLASHSR_PROG_MSK))
break;
}
}
if (i == 0xFFFF)
goto end;
if (flash_lock() == ERROR)
goto end;
return OK;
end:
flash_lock();
return ERROR;
}
/**
* @}
*/
#endif
/**
* @}
*/
/**
* @}
*/
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