feat: add iwdg driver

bsp/n32g452xx/Libraries/rt_drivers/drv_wdt.c

+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author            Notes
+ * 2020-01-22     shelton           first version
+ * 2021-11-10     breo.com          porting to n32
+ */
+
+#include <board.h>
+#include <drivers/watchdog.h>
+
+#ifdef RT_USING_WDT
+#ifdef BSP_USING_WDT
+
+#define LSI_VALUE 40000
+
+//#define DRV_DEBUG
+#define LOG_TAG             "drv.wdt"
+#include <drv_log.h>
+
+struct n32_wdt_obj
+{
+    IWDG_Module *instance;
+    rt_uint32_t Prescaler;
+    rt_uint32_t Reload;
+    rt_uint16_t is_start;
+};
+static struct n32_wdt_obj n32_wdt;
+static struct rt_watchdog_ops ops;
+static rt_watchdog_t watchdog;
+
+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:
+        IWDG_ReloadKey();
+        break;
+    /* set watchdog timeout */
+    case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
+#if defined(LSI_VALUE)
+        if (LSI_VALUE)
+        {
+            n32_wdt.Reload = (*((rt_uint32_t *)arg)) * LSI_VALUE / 256 ;
+        }
+        else
+        {
+            LOG_E("Please define the value of LSI_VALUE!");
+        }
+        if (n32_wdt.Reload > 0xFFF)
+        {
+            LOG_E("wdg set timeout parameter too large, please less than %ds", 0xFFF * 256 / LSI_VALUE);
+            return -RT_EINVAL;
+        }
+#else
+#error "Please define the value of LSI_VALUE!"
+#endif
+        if (n32_wdt.is_start)
+        {
+            IWDG_WriteConfig(IWDG_WRITE_ENABLE);
+            IWDG_SetPrescalerDiv(n32_wdt.Prescaler);
+            IWDG_CntReload(n32_wdt.Reload);
+            IWDG_WriteConfig(IWDG_WRITE_DISABLE);
+            IWDG_Enable();
+        }
+        break;
+    case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
+#if defined(LSI_VALUE)
+        if (LSI_VALUE)
+        {
+            (*((rt_uint32_t *)arg)) = n32_wdt.Reload * 256 / LSI_VALUE;
+        }
+        else
+        {
+            LOG_E("Please define the value of LSI_VALUE!");
+        }
+#else
+#error "Please define the value of LSI_VALUE!"
+#endif
+        break;
+    case RT_DEVICE_CTRL_WDT_START:
+        IWDG_WriteConfig(IWDG_WRITE_ENABLE);
+        IWDG_SetPrescalerDiv(n32_wdt.Prescaler);
+        IWDG_CntReload(n32_wdt.Reload);
+        IWDG_WriteConfig(IWDG_WRITE_DISABLE);
+        IWDG_Enable();
+        n32_wdt.is_start = 1;
+        break;
+    default:
+        LOG_W("This command is not supported.");
+        return -RT_ERROR;
+    }
+    return RT_EOK;
+}
+
+int rt_hw_wdt_init(void)
+{
+    n32_wdt.instance = IWDG;
+    n32_wdt.Prescaler = IWDG_PRESCALER_DIV256;
+    n32_wdt.Reload = 0x00000FFF;
+    n32_wdt.is_start = 0;
+
+    ops.init = &wdt_init;
+    ops.control = &wdt_control;
+    watchdog.ops = &ops;
+    /* register watchdog device */
+    if (rt_hw_watchdog_register(&watchdog, "wdt", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
+    {
+        LOG_E("wdt device register failed.");
+        return -RT_ERROR;
+    }
+    LOG_D("wdt device register success.");
+    return RT_EOK;
+}
+INIT_BOARD_EXPORT(rt_hw_wdt_init);
+
+#endif /* BSP_USING_WDT */
+#endif /* RT_USING_WDT */
+

bsp/n32g452xx/n32g452xx-mini-system/.config

@@ -7,6 +7,7 @@
 # RT-Thread Kernel
 #
 CONFIG_RT_NAME_MAX=8
+# CONFIG_RT_USING_BIG_ENDIAN is not set
 # CONFIG_RT_USING_ARCH_DATA_TYPE is not set
 # CONFIG_RT_USING_SMP is not set
 CONFIG_RT_ALIGN_SIZE=4
@@ -142,7 +143,7 @@ CONFIG_RT_USING_PWM=y
 # CONFIG_RT_USING_RTC is not set
 # CONFIG_RT_USING_SDIO is not set
 # CONFIG_RT_USING_SPI is not set
-# CONFIG_RT_USING_WDT is not set
+CONFIG_RT_USING_WDT=y
 # CONFIG_RT_USING_AUDIO is not set
 # CONFIG_RT_USING_SENSOR is not set
 # CONFIG_RT_USING_TOUCH is not set
@@ -154,6 +155,7 @@ CONFIG_RT_USING_PWM=y
 #
 # Using USB
 #
+# CONFIG_RT_USING_USB is not set
 # CONFIG_RT_USING_USB_HOST is not set
 # CONFIG_RT_USING_USB_DEVICE is not set
 
@@ -161,10 +163,11 @@ CONFIG_RT_USING_PWM=y
 # POSIX layer and C standard library
 #
 CONFIG_RT_USING_LIBC=y
-# CONFIG_RT_USING_PTHREADS is not set
 CONFIG_RT_LIBC_USING_TIME=y
+# CONFIG_RT_LIBC_USING_FILEIO is not set
 # CONFIG_RT_USING_MODULE is not set
 CONFIG_RT_LIBC_DEFAULT_TIMEZONE=8
+# CONFIG_RT_USING_PTHREADS is not set
 
 #
 # Network
@@ -201,6 +204,7 @@ CONFIG_RT_LIBC_DEFAULT_TIMEZONE=8
 # CONFIG_RT_USING_RYM is not set
 # CONFIG_RT_USING_ULOG is not set
 # CONFIG_RT_USING_UTEST is not set
+# CONFIG_RT_USING_VAR_EXPORT is not set
 # CONFIG_RT_USING_RT_LINK is not set
 
 #
@@ -297,10 +301,6 @@ CONFIG_RT_LIBC_DEFAULT_TIMEZONE=8
 # CONFIG_PKG_USING_AGILE_FTP is not set
 # CONFIG_PKG_USING_EMBEDDEDPROTO is not set
 # CONFIG_PKG_USING_RT_LINK_HW is not set
-# CONFIG_PKG_USING_LORA_PKT_FWD is not set
-# CONFIG_PKG_USING_LORA_GW_DRIVER_LIB is not set
-# CONFIG_PKG_USING_LORA_PKT_SNIFFER is not set
-# CONFIG_PKG_USING_HM is not set
 
 #
 # security packages
@@ -334,13 +334,6 @@ CONFIG_RT_LIBC_DEFAULT_TIMEZONE=8
 # CONFIG_PKG_USING_NUEMWIN is not set
 # CONFIG_PKG_USING_MP3PLAYER is not set
 # CONFIG_PKG_USING_TINYJPEG is not set
-# CONFIG_PKG_USING_UGUI is not set
-
-#
-# U8G2: a monochrome graphic library
-#
-# CONFIG_PKG_USING_U8G2_OFFICIAL is not set
-# CONFIG_PKG_USING_U8G2 is not set
 
 #
 # tools packages
@@ -449,6 +442,7 @@ CONFIG_RT_LIBC_DEFAULT_TIMEZONE=8
 # CONFIG_PKG_USING_AS7341 is not set
 # CONFIG_PKG_USING_STM32_SDIO is not set
 # CONFIG_PKG_USING_ICM20608 is not set
+# CONFIG_PKG_USING_U8G2 is not set
 # CONFIG_PKG_USING_BUTTON is not set
 # CONFIG_PKG_USING_PCF8574 is not set
 # CONFIG_PKG_USING_SX12XX is not set
@@ -510,8 +504,6 @@ CONFIG_RT_LIBC_DEFAULT_TIMEZONE=8
 # CONFIG_PKG_USING_MCP23008 is not set
 # CONFIG_PKG_USING_BLUETRUM_SDK is not set
 # CONFIG_PKG_USING_MISAKA_AT24CXX is not set
-# CONFIG_PKG_USING_MISAKA_RGB_BLING is not set
-# CONFIG_PKG_USING_BL_MCU_SDK is not set
 
 #
 # AI packages
@@ -594,6 +586,7 @@ CONFIG_SOC_N32G452XX=y
 #
 CONFIG_RT_USING_GPIO=y
 # CONFIG_BSP_USING_ON_CHIP_FLASH is not set
+# CONFIG_BSP_USING_WDT is not set
 CONFIG_BSP_USING_UART=y
 CONFIG_BSP_USING_UART1=y
 # CONFIG_BSP_USING_UART2 is not set

bsp/n32g452xx/n32g452xx-mini-system/board/Kconfig

@@ -26,7 +26,12 @@ menu "On-chip Peripheral Drivers"
 
     config BSP_USING_ON_CHIP_FLASH
         bool "Enable on-chip FLASH"
-        default n 
+        default n
+
+    config BSP_USING_WDT
+        bool "Enable Watchdog Timer"
+        select RT_USING_WDT
+        default n
 
     menuconfig BSP_USING_UART
         bool "Enable UART"

bsp/n32g452xx/n32g452xx-mini-system/rtconfig.h

@@ -85,6 +85,7 @@
 #define RT_SERIAL_RB_BUFSZ 64
 #define RT_USING_PIN
 #define RT_USING_PWM
+#define RT_USING_WDT
 
 /* Using USB */
 
@@ -143,9 +144,6 @@
 /* multimedia packages */
 
 
-/* U8G2: a monochrome graphic library */
-
-
 /* tools packages */