[bsp][pico] add drv_wdt (#7614)

bsp/raspberry-pico/drivers/SConscript

@@ -19,6 +19,9 @@ if GetDepend('BSP_USING_SOFT_SPI'):
 if GetDepend('BSP_USING_ADC'):
     src += ['drv_adc.c']
 
+if GetDepend('BSP_USING_WDT'):
+    src += ['drv_wdt.c']
+
 group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)
 
 Return('group')

bsp/raspberry-pico/drivers/drv_wdt.c

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-06-05     Chushicheng  the first version
+ */
+
+#include "drv_wdt.h"
+#include <hardware/watchdog.h>
+
+#define DBG_TAG              "drv.wdt"
+#define DBG_LVL               DBG_INFO
+#include <rtdbg.h>
+
+static struct pico_wdt pico_wdt_obj;
+
+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)
+{
+    static rt_uint32_t delay_ms;
+    switch (cmd)
+    {
+        /* feed the watchdog */
+    case RT_DEVICE_CTRL_WDT_KEEPALIVE:
+        watchdog_update();
+        break;
+        /* set watchdog timeout */
+    case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
+        delay_ms = *((rt_uint32_t*)arg) * 1000;
+        watchdog_reboot(0, RT_NULL, delay_ms);
+        break;
+    case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
+        (*((rt_uint32_t*)arg)) = watchdog_get_count();
+        break;
+    case RT_DEVICE_CTRL_WDT_START:
+        watchdog_enable(delay_ms, 1);
+        pico_wdt_obj.is_start = 1;
+        break;
+    default:
+        LOG_W("This command is not supported.");
+        return -RT_ERROR;
+    }
+    return RT_EOK;
+}
+
+static const struct rt_watchdog_ops ops =
+{
+    .init    = wdt_init,
+    .control = wdt_control,
+};
+
+int rt_hw_wdt_init(void)
+{
+    int result = RT_EOK;
+
+    pico_wdt_obj.watchdog.ops = &ops;
+    /* register wdt device */
+    if (rt_hw_watchdog_register(&pico_wdt_obj.watchdog, "wdt", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) == RT_EOK)
+    {
+        LOG_D("wdt init success");
+    }
+    else
+    {
+        LOG_E("wdt register failed");
+        result = -RT_ERROR;
+    }
+
+    return result;
+}
+INIT_BOARD_EXPORT(rt_hw_wdt_init);

bsp/raspberry-pico/drivers/drv_wdt.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-06-05     Chushicheng  the first version
+ */
+
+#ifndef DRV_WDT_H
+#define DRV_WDT_H
+
+#include <rtdevice.h>
+
+/* pico wdt driver class */
+struct pico_wdt
+{
+    rt_watchdog_t watchdog;
+    rt_uint16_t is_start;
+};
+
+int rt_hw_wdt_init(void);
+
+#endif  /* DRV_WDT_H */

bsp/raspberry-pico/libraries/Kconfig

@@ -114,6 +114,11 @@ menu "On-chip Peripheral Drivers"
                 bool "Enable ADC2 (GP28)"
                 default n
         endif
+
+    config BSP_USING_WDT
+        bool "Enable WDT"
+        select RT_USING_WDT
+        default n
 endmenu
 
 endmenu

bsp/raspberry-pico/libraries/SConscript

@@ -12,6 +12,7 @@ pico-sdk/src/rp2_common/pico_multicore/multicore.c
 pico-sdk/src/rp2_common/pico_stdlib/stdlib.c
 pico-sdk/src/rp2_common/hardware_gpio/gpio.c
 pico-sdk/src/rp2_common/hardware_adc/adc.c
+pico-sdk/src/rp2_common/hardware_watchdog/watchdog.c
 pico-sdk/src/rp2_common/hardware_claim/claim.c
 pico-sdk/src/rp2_common/hardware_sync/sync.c
 pico-sdk/src/rp2_common/pico_platform/platform.c
@@ -67,6 +68,7 @@ path = [
     cwd + '/pico-sdk/src/common/pico_stdlib/include',
     cwd + '/pico-sdk/src/rp2_common/hardware_gpio/include',
     cwd + '/pico-sdk/src/rp2_common/hardware_adc/include',
+    cwd + '/pico-sdk/src/rp2_common/hardware_watchdog/include',
     cwd + '/pico-sdk/src/common/pico_base/include',
     cwd + '/pico-sdk/src/boards/include',
     cwd + '/pico-sdk/src/rp2_common/pico_platform/include',