【瑞萨RA4系列开发板体验】+RA4M2 之WDT

WDT简介

瑞萨RA4M2的窗口看门狗定时器（WDT）是一个14位递减计数器，可用于在计数器下溢时复位MCU，如果系统失控导致WDT无法在窗口值间刷新计数器，就会发生不可屏蔽中断或看门狗定时器复位。

WDT介绍

WDT描述：

WDT框图：

WDT刷新寄存器说明：

WDT控制寄存器说明：

RASC新建WDT工程

新建WDT工程：

选择开发板型号：

选择闪灯工程：

生成WDT代码：

点击”stacks”，点击”New Stack”，在弹出的界面中，选择”Monitoring”，然后选中”Watchdog(r_wdt)”或选择”Search”然后搜索”WDT”关键字，然后点击”Generate Project Context”生成代码。

添加WDT代码

/***********************************************************************************************************************
 * Copyright [2020-2022] Renesas Electronics Corporation and/or its affiliates.  All Rights Reserved.
 *
 * This software and documentation are supplied by Renesas Electronics America Inc. and may only be used with products
 * of Renesas Electronics Corp. and its affiliates ("Renesas").  No other uses are authorized.  Renesas products are
 * sold pursuant to Renesas terms and conditions of sale.  Purchasers are solely responsible for the selection and use
 * of Renesas products and Renesas assumes no liability.  No license, express or implied, to any intellectual property
 * right is granted by Renesas. This software is protected under all applicable laws, including copyright laws. Renesas
 * reserves the right to change or discontinue this software and/or this documentation. THE SOFTWARE AND DOCUMENTATION
 * IS DELIVERED TO YOU "AS IS," AND RENESAS MAKES NO REPRESENTATIONS OR WARRANTIES, AND TO THE FULLEST EXTENT
 * PERMISSIBLE UNDER APPLICABLE LAW, DISCLAIMS ALL WARRANTIES, WHETHER EXPLICITLY OR IMPLICITLY, INCLUDING WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT, WITH RESPECT TO THE SOFTWARE OR
 * DOCUMENTATION.  RENESAS SHALL HAVE NO LIABILITY ARISING OUT OF ANY SECURITY VULNERABILITY OR BREACH.  TO THE MAXIMUM
 * EXTENT PERMITTED BY LAW, IN NO EVENT WILL RENESAS BE LIABLE TO YOU IN CONNECTION WITH THE SOFTWARE OR DOCUMENTATION
 * (OR ANY PERSON OR ENTITY CLAIMING RIGHTS DERIVED FROM YOU) FOR ANY LOSS, DAMAGES, OR CLAIMS WHATSOEVER, INCLUDING,
 * WITHOUT LIMITATION, ANY DIRECT, CONSEQUENTIAL, SPECIAL, INDIRECT, PUNITIVE, OR INCIDENTAL DAMAGES; ANY LOST PROFITS,
 * OTHER ECONOMIC DAMAGE, PROPERTY DAMAGE, OR PERSONAL INJURY; AND EVEN IF RENESAS HAS BEEN ADVISED OF THE POSSIBILITY
 * OF SUCH LOSS, DAMAGES, CLAIMS OR COSTS.
 **********************************************************************************************************************/

#include "hal_data.h"

void R_BSP_WarmStart(bsp_warm_start_event_t event);

extern bsp_leds_t g_bsp_leds;

/*******************************************************************************************************************//**
 * [url=home.php?mod=space&uid=2666770]@Brief[/url]  Blinky example application
 *
 * Blinks all leds at a rate of 1 second using the software delay function provided by the BSP.
 *
 **********************************************************************************************************************/
void hal_entry (void)
	
{

     R_BSP_PinAccessEnable();
	 (void)R_WDT_Open(&g_wdt0_ctrl, &g_wdt0_cfg);
	 (void) R_WDT_Refresh(&g_wdt0_ctrl);
   

    while (1)
    {
        (void)R_WDT_Refresh(&g_wdt0_ctrl);
        R_BSP_PinWrite(BSP_IO_PORT_04_PIN_15, BSP_IO_LEVEL_LOW);
        R_BSP_SoftwareDelay(500, 1000);
		R_BSP_PinWrite(BSP_IO_PORT_04_PIN_15, BSP_IO_LEVEL_HIGH);
        R_BSP_SoftwareDelay(500, 1000);
    }
}