WatchDog

看门狗初始化问题,导致硬件错误

发布于 2018-10-31 17:28:50 浏览：2804 订阅该版

7 个回答

flyboy 2018-10-31

Do my self();

misonyo 2018-10-31

This guy hasn't written anything yet

[i=s] 本帖最后由 misonyo 于 2018-10-31 17:39 编辑 [/i]

[md]参考下面的代码使用看门狗

```
#include <rtthread.h>
 #include <rtdevice.h>

#define IWDG_DEVICE_NAME    "iwg"

static rt_device_t wdg_dev;

static void idle_hook(void)
 {
     /* 在空闲线程的回调函数里喂狗 */
     rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_KEEPALIVE, NULL);
 }

static int iwdg_sample(int argc,char *argv[])
 {
     rt_err_t result = RT_EOK;
     rt_uint32_t timeout = 1000;    /* 超时时间为1000ms*/
     char device_name[RT_NAME_MAX];

/* 判断命令行参数是否给定了设备名称 */
     if (argc == 2)
     {
         rt_strncpy(device_name, argv[1], RT_NAME_MAX);
     }
     else
     {
         rt_strncpy(device_name, IWDG_DEVICE_NAME, RT_NAME_MAX);
     }
     /* 根据设备名称查找看门狗设备，获取设备句柄 */
     wdg_dev = rt_device_find(device_name);
     if (!wdg_dev)
     {
         rt_kprintf("find %s failed!\n",device_name);
         return RT_ERROR;
     }
     /* 初始化设备 */
     result = rt_device_init(wdg_dev);
     if (result != RT_EOK)
     {
         rt_kprintf("initialize %s failed!\n",device_name);
         return RT_ERROR;
     }
     /* 设置看门狗溢出时间 */
     result = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, (void*)timeout);
     if (result != RT_EOK)
     {
         rt_kprintf("set %s timeout failed!\n",device_name);
         return RT_ERROR;
     }
     /* 设置空闲线程回调函数 */
     rt_thread_idle_sethook(idle_hook);

return result;
 }
 /* 导出到 msh 命令列表中 */
 MSH_CMD_EXPORT(iwdg_sample, iwdg sample);
```[/md]

王秀峰 2018-10-31

This guy hasn't written anything yet

王秀峰 2018-10-31

This guy hasn't written anything yet

Monkey 2019-04-27

This guy hasn't written anything yet

[quote][size=2][url=forum.php?mod=redirect&goto=findpost&pid=38900&ptid=8227][color=#999999]misonyo 发表于 2018-10-31 17:36[/color][/url][/size]
[md]参考下面的代码使用看门狗

```
[/quote]

您好，我在操作看门狗的时候根据您贴出的例程来操作 rt_device_find()返回失败。从MSH上查看device_list并没有找到iwg的设备
msh >list_d
list_device
msh >list_device
device         type         ref count
------ -------------------- ----------
uart3  Character Device     0
uart2  Character Device     0
uart1  Character Device     2
pin    Miscellaneous Device 0
msh >

麻烦问题项我应该怎么把iwg注册上去呢？
在main函数中增加res = rt_hw_watchdog_register((rt_watchdog_t *)&wtt, wdg_name, RT_DEVICE_FLAG_RDWR,NULL);可以查找到设备但是在init的时候就会产生

psr: 0x21000200
r00: 0x00000000
r01: 0x20000191
r02: 0x00000008
r03: 0xdeadbee3
r04: 0xdeadbeef
r05: 0x00000075
r06: 0x20000190
r07: 0xdeadbee3
r08: 0xdeadbeef
r09: 0xdeadbeef
r10: 0xdeadbeef
r11: 0xdeadbeef
r12: 0x00000000
 lr: 0x0800ae09
 pc: 0x0800c6c2
hard fault on thread: tshell

thread pri  status      sp     stack size max used left tick  error
------ ---  ------- ---------- ----------  ------  ---------- ---
tshell  20  ready   0x00000044 0x00001000    03%   0x0000000a 000
tidle   31  ready   0x00000048 0x00000100    28%   0x00000020 000
timer    4  suspend 0x00000060 0x00000200    18%   0x00000009 000
main    10  close   0x0000006c 0x00000800    10%   0x0000000e 000
bus fault:
SCB_CFSR_BFSR:0x82 PRECISERR SCB->BFAR:DEADBEE3