124 lines
4.0 KiB
C
124 lines
4.0 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 2018-2022 Renesas Electronics Corporation All rights reserved.
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*******************************************************************************/
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/*******************************************************************************
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* DESCRIPTION : Watchdog Timer function
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******************************************************************************/
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/******************************************************************************
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* @file swdt.c
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* - Version : 0.02
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* @brief
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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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* : 12.08.2022 0.01 First Release
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* : 31.10.2022 0.02 License notation change.
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*****************************************************************************/
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#include "mem_io.h"
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#include "rcar_def.h"
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#include "rcar_register.h"
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#include "swdt.h"
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#include "gic.h"
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#include "log.h"
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#include "ip_control.h"
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void swdt_init(void)
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{
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uint32_t sr;
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uint32_t reg;
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uint32_t val;
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uint32_t chk_data;
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/* 1. Clear the TME bit in SWTCSRA to 0 to temporarily stop counting. */
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reg = mem_read32(SWDT_WTCSRA) & WTCSRA_TME;
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if (WTCSRA_TME == reg)
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{
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mem_write32(SWDT_WTCSRA, WTCSRA_UPPER_BYTE);
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}
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/* 2.Write the set value in SWTCNT */
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/* OSCCLK check */
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reg = mem_read32(RST_MODEMR0);
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chk_data = reg & CHECK_MD13_MD14;
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val = WTCNT_UPPER_BYTE;
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if (MD14_MD13_TYPE_0 == chk_data)
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{
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val |= SWDTCNT_133330HZ;
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}
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else if(MD14_MD13_TYPE_1 == chk_data)
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{
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val |= SWDTCNT_131570HZ;
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}
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else if(MD14_MD13_TYPE_3 == chk_data)
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{
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val |= SWDTCNT_131570HZ;
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}
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else
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{
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ERROR("MODEMR ERROR value = 0x%x\n", chk_data);
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panic;
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}
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mem_write32(SWDT_WTCNT, val);
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/* 3. Clear the bit4(WOVF) in SWTCSRA to 0. */
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mem_write32(SWDT_WTCSRA, WTCSRA_UPPER_BYTE | WTCSRA_WOVFE | WTCSRA_CKS0_OSCCLK);
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/* 5.Confirm that SWTCSRA.WRFLG becomes 0.*/
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while (true)
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{
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if ((mem_read32(SWDT_WTCSRA) & WTCSRA_WRFLG) == 0U)
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{
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break;
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}
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}
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/* 6. Start the counting by setting the TME bit in SWTCSRA to 1. */
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sr = mem_read32(SWDT_WTCSRA) & WTCSRA_MASK_ALL;
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mem_write32(SWDT_WTCSRA, (WTCSRA_UPPER_BYTE | sr | WTCSRA_TME));
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}
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/* End of function swdt_init(void) */
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void swdt_release(void)
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{
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mem_write32(SWDT_WTCSRA, WTCSRA_INIT_DATA);
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mem_write32(SWDT_WTCNT, WTCNT_INIT_DATA);
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}
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/* End of function swdt_release(void) */
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void swdt_exec(void)
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{
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ERROR("System Watchdog Timer overflow.\n");
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panic;
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}
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/* End of function swdt_exec(void) */
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