[bsp][nxp][mcxa153] add watch dog driver

Author: hywing

bsp/nxp/mcx/mcxa/Libraries/drivers/drv_wdt.c

@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-11-25     hywing       The first version for NXP MCXA153 Board
+ */
+
+#include <rtthread.h>
+#include "drv_wdt.h"
+
+#include "fsl_wwdt.h"
+#include "fsl_clock.h"
+
+#ifdef RT_USING_WDT
+
+#define WDT_CLK_FREQ        CLOCK_GetWwdtClkFreq()
+#define WWDT                WWDT0
+#define APP_WDT_IRQn        WWDT0_IRQn
+#define APP_WDT_IRQ_HANDLER WWDT0_IRQHandler
+
+struct mcx_wdt
+{
+    rt_watchdog_t watchdog;
+    WWDT_Type *wdt_base;
+};
+
+static struct mcx_wdt wdt_dev;
+
+void APP_WDT_IRQ_HANDLER(void)
+{
+    uint32_t wdtStatus = WWDT_GetStatusFlags(WWDT);
+
+    //APP_LED_TOGGLE;
+
+    /* The chip will reset before this happens */
+    if (wdtStatus & kWWDT_TimeoutFlag)
+    {
+        WWDT_ClearStatusFlags(WWDT, kWWDT_TimeoutFlag);
+    }
+
+    /* Handle warning interrupt */
+    if (wdtStatus & kWWDT_WarningFlag)
+    {
+        /* A watchdog feed didn't occur prior to warning timeout */
+        WWDT_ClearStatusFlags(WWDT, kWWDT_WarningFlag);
+        /* User code. User can do urgent case before timeout reset.
+         * IE. user can backup the ram data or ram log to flash.
+         * the period is set by config.warningValue, user need to
+         * check the period between warning interrupt and timeout.
+         */
+    }
+    SDK_ISR_EXIT_BARRIER;
+}
+
+static rt_err_t wdt_init(rt_watchdog_t *wdt)
+{
+    wwdt_config_t config;
+    uint32_t wdtFreq;
+    bool timeOutResetEnable;
+
+    /* Enable the WWDT time out to reset the CPU. */
+    timeOutResetEnable = true;
+
+
+    /* The WDT divides the input frequency into it by 4 */
+    wdtFreq = WDT_CLK_FREQ / 4;
+
+    WWDT_GetDefaultConfig(&config);
+
+    /*
+     * Set watchdog feed time constant to approximately 4s
+     * Set watchdog warning time to 512 ticks after feed time constant
+     * Set watchdog window time to 1s
+     */
+    config.timeoutValue = wdtFreq * 4;
+    config.warningValue = 512;
+    config.windowValue  = wdtFreq * 1;
+    /* Configure WWDT to reset on timeout */
+    config.enableWatchdogReset = true;
+    /* Setup watchdog clock frequency(Hz). */
+    config.clockFreq_Hz = WDT_CLK_FREQ;
+	
+    WWDT_Init(WWDT, &config);
+	NVIC_EnableIRQ(APP_WDT_IRQn);
+
+    return RT_EOK;
+}
+
+void delayWwdtWindow(void)
+{
+    /* For the TV counter register value will decrease after feed watch dog,
+     * we can use it to as delay. But in user scene, user need feed watch dog
+     * in the time period after enter Window but before warning intterupt.
+     */
+    while (WWDT->TV > WWDT->WINDOW)
+    {
+        __NOP();
+    }
+}
+
+static rt_err_t wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
+{
+    switch (cmd)
+    {
+        case RT_DEVICE_CTRL_WDT_START:
+            WWDT_Enable(wdt_dev.wdt_base);
+            return RT_EOK;
+
+        case RT_DEVICE_CTRL_WDT_STOP:
+            WWDT_Disable(wdt_dev.wdt_base);
+            return RT_EOK;
+
+        case RT_DEVICE_CTRL_WDT_KEEPALIVE:
+			delayWwdtWindow();
+            WWDT_Refresh(wdt_dev.wdt_base);
+            return RT_EOK;
+
+        case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
+            if (arg != RT_NULL)
+            {
+                uint32_t timeout = *((uint32_t *)arg);
+                timeout = timeout * WDT_CLK_FREQ / 4;
+                WWDT_SetTimeoutValue(wdt_dev.wdt_base, timeout);
+                return RT_EOK;
+            }
+            return -RT_ERROR;
+
+        default:
+            return -RT_ERROR;
+    }
+}
+
+static struct rt_watchdog_ops wdt_ops =
+{
+    wdt_init,
+    wdt_control,
+};
+
+int rt_hw_wdt_init(void)
+{
+    wdt_dev.wdt_base = WWDT;
+
+    wdt_dev.watchdog.ops = &wdt_ops;
+
+    if (rt_hw_watchdog_register(&wdt_dev.watchdog, "wdt", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
+    {
+        rt_kprintf("wdt register failed\n");
+        return -RT_ERROR;
+    }
+
+    return RT_EOK;
+}
+
+INIT_BOARD_EXPORT(rt_hw_wdt_init);
+
+#endif /* RT_USING_WDT */

bsp/nxp/mcx/mcxa/Libraries/drivers/drv_wdt.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-11-25     hywing       The first version for NXP MCXA153 Board
+ */
+
+#ifndef __DRV_WDT_H__
+#define __DRV_WDT_H__
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+int rt_hw_wdt_init(void);
+
+#endif /* __DRV_WDT_H__ */