83 lines
3.4 KiB
C
83 lines
3.4 KiB
C
/*******************************************************************************
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* DISCLAIMER
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* This software is supplied by Renesas Electronics Corporation and is only
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* intended for use with Renesas products. No other uses are authorized. This
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* software is owned by Renesas Electronics Corporation and is protected under
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* all applicable laws, including copyright laws.
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* THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING
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* THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT
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* LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
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* AND NON-INFRINGEMENT. ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED.
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* TO THE MAXIMUM EXTENT PERMITTED NOT PROHIBITED BY LAW, NEITHER RENESAS
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* ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES SHALL BE LIABLE
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* FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
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* ANY REASON RELATED TO THIS SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE
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* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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* Renesas reserves the right, without notice, to make changes to this software
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* and to discontinue the availability of this software. By using this software,
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* you agree to the additional terms and conditions found by accessing the
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* following link:
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* http://www.renesas.com/disclaimer
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* Copyright 2022 Renesas Electronics Corporation All rights reserved.
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*******************************************************************************/
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/*******************************************************************************
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* DESCRIPTION : MFIS driver
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******************************************************************************/
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/******************************************************************************
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* @file mfis.c
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* - Version : 0.01
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* @brief Initial setting process of MFIS.
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* .
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*****************************************************************************/
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/******************************************************************************
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* History : DD.MM.YYYY Version Description
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* : 02.04.2022 0.01 First Release
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*****************************************************************************/
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#include <stdint.h>
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#include <mem_io.h>
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#include <micro_wait.h>
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#include <mfis.h>
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#include <mfis_register.h>
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#define MFIS_CODE_VALID (0xACCE0000U)
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#define MFISWPCNTR_ENABLE (0U) /* 1' b0: Enable write protection */
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#define MFISLCKR_LCK_BIT ((uint32_t)1U << 0U)
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#define MFISLCKR_UNLOCK (0U)
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void mfis_init(void)
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{
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/* Write Protection Control Register */
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/* Enable write protection setting */
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mem_write32(MFIS_WPCNTR, (uint32_t)(MFIS_CODE_VALID + MFISWPCNTR_ENABLE));
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/* IPL considers the situation that mutex of MFIS is not released, release it. */
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mfis_unlock();
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}
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/* End of function mfis_init(void) */
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void mfis_lock(void)
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{
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/* MFIS Lock Register [j] (MFISLCKR[j]) */
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/* bit in LCK != 0? */
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while((mem_read32(MFIS_LCKR) & MFISLCKR_LCK_BIT) != MFISLCKR_UNLOCK)
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{
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micro_wait(10U); /* 10us */
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}
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/* this bit is automatically set to "1" */
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}
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/* End of function mfis_lock(void) */
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void mfis_unlock(void)
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{
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/* Write Access Control Register */
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/* MFISLCKR[j] Register address setting */
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mem_write32(MFIS_WACNTR, (uint32_t)(MFIS_CODE_VALID + MFISLCKR_ADDRESS));
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/* MFIS Lock Register [j] (MFISLCKR[j]) */
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mem_write32(MFIS_LCKR, (uint32_t)MFISLCKR_UNLOCK);
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}
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/* End of function mfis_unlock(void) */
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