[bsp/nrf5x/libraries/drivers] add wdt driver

bsp/nrf5x/libraries/drivers/SConscript

@@ -29,6 +29,9 @@ if GetDepend(['BSP_USING_SAADC']):
 if GetDepend(['BSP_USING_PWM']):
     src += ['drv_pwm.c']
 
+if GetDepend(['BSP_USING_WDT']):
+    src += ['drv_wdt.c']
+
 path =  [cwd]
 
 group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path)

bsp/nrf5x/libraries/drivers/drv_wdt.c

+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author            Notes
+ * 2020-08-18     ylz0923           first version
+ */
+
+#include <board.h>
+#include <rtdevice.h>
+#include <nrfx_wdt.h>
+
+#ifdef RT_USING_WDT
+
+struct nrf5x_wdt_obj
+{
+    rt_watchdog_t watchdog;
+    nrfx_wdt_t wdt;
+    nrfx_wdt_channel_id ch;
+    rt_uint16_t is_start;
+};
+static struct nrf5x_wdt_obj nrf5x_wdt = {
+    .wdt = NRFX_WDT_INSTANCE(0),
+};
+static nrfx_wdt_config_t nrf5x_wdt_cfg = NRFX_WDT_DEFAULT_CONFIG;
+static struct rt_watchdog_ops ops;
+
+static rt_err_t wdt_init(rt_watchdog_t *wdt)
+{
+    return RT_EOK;
+}
+
+static rt_err_t wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
+{
+    switch (cmd)
+    {
+    /* feed the watchdog */
+    case RT_DEVICE_CTRL_WDT_KEEPALIVE:
+        nrfx_wdt_feed(&nrf5x_wdt.wdt);
+        break;
+    /* set watchdog timeout */
+    case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
+        nrf5x_wdt_cfg.reload_value = (rt_uint32_t)arg * 1000;
+        break;
+    case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
+        *((rt_uint32_t*)arg) = nrf5x_wdt_cfg.reload_value;
+        break;
+    case RT_DEVICE_CTRL_WDT_START:
+        if (nrf5x_wdt.is_start != 1)
+        {
+            nrfx_wdt_init(&nrf5x_wdt.wdt, &nrf5x_wdt_cfg, RT_NULL);
+            nrfx_wdt_channel_alloc(&nrf5x_wdt.wdt, &nrf5x_wdt.ch);
+            nrfx_wdt_enable(&nrf5x_wdt.wdt);
+            nrf5x_wdt.is_start = 1;
+        }
+        break;
+    default:
+        return -RT_ERROR;
+    }
+    return RT_EOK;
+}
+
+int rt_wdt_init(void)
+{
+    nrf5x_wdt.is_start = 0;
+    ops.init = &wdt_init;
+    ops.control = &wdt_control;
+    nrf5x_wdt.watchdog.ops = &ops;
+    /* register watchdog device */
+    if (rt_hw_watchdog_register(&nrf5x_wdt.watchdog, "wdt", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
+    {
+        return -RT_ERROR;
+    }
+    return RT_EOK;
+}
+INIT_BOARD_EXPORT(rt_wdt_init);
+
+static int wdt_sample(int argc, char *argv[])
+{
+    rt_device_t wdt = rt_device_find("wdt");
+    rt_device_init(wdt);
+    rt_device_control(wdt, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, (void *)2);
+    rt_device_control(wdt, RT_DEVICE_CTRL_WDT_START, RT_NULL);
+}
+MSH_CMD_EXPORT(wdt_sample, wdt sample);
+
+#endif /* RT_USING_WDT */

bsp/nrf5x/nrf52840/board/Kconfig

@@ -332,6 +332,21 @@ endif
             range 0x1000 0x1000
             default 0x1000
 	endmenu
+    config BSP_USING_WDT
+        bool "Enable WDT"
+        select RT_USING_WDT
+        default n
+    if BSP_USING_WDT
+        config NRFX_WDT_ENABLED
+        int
+        default 1
+        config NRFX_WDT0_ENABLED
+        int
+        default 1
+        config NRFX_WDT_CONFIG_NO_IRQ
+        int
+        default 1
+    endif
 endmenu
 
 endmenu