# RTL8720DF板在联网成功后出现崩溃：Hard Fault Patch (Non-secure)

**URL:** <https://forum.amebaiot.com/t/rtl8720df-hard-fault-patch-non-secure/1853>\
**Category:** SDK\
**Tags:** rtl872xd\
**Created:** [May 11, 2023, 10:02am UTC](https://forum.amebaiot.com/t/rtl8720df-hard-fault-patch-non-secure/1853 "2023-05-11T10:02:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![peter](https://avatars.discourse-cdn.com/v4/letter/p/278dde/32.png) [@peter](https://forum.amebaiot.com/u/peter)\
**Post date:** [May 11, 2023, 10:02am UTC](https://forum.amebaiot.com/t/rtl8720df-hard-fault-patch-non-secure/1853/1 "2023-05-11T10:02:06Z")

</div>

使用RTL8720DF的芯片，在休眠唤醒重联网络成功后，出现“Hard Fault”的报错，但debug的串口还可以输入，应该是KM4这个核死掉了，而KM0这个核还能工作，请问是什么原因导致出现这种问题？是硬件还是软件问题？怎样排查定位问题？

[2023-05-10\_17:52:15][80842804]mqtt:Connect Network “8.134.152.164”  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15][80842809]mqtt:addr = 8.134.152.164  
[2023-05-10\_17:52:15]example\_wlan\_fast\_connect  
[2023-05-10\_17:52:15]Sleep\_ReconnectionNet  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15]RTL8721D[Driver]: set ssid [as]  
[2023-05-10\_17:52:15]dissconn reason code: 0  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15]RTL8721D[Driver]: start auth to 44:f9:71:4a:56:11  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15]RTL8721D[Driver]: auth alg = 0  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15]RTL8721D[Driver]:  
[2023-05-10\_17:52:15]OnAuthClient:algthm = 0, seq = 2, status = 0, sae\_msg\_len = 0  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15]RTL8721D[Driver]: auth success, start assoc  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15]RTL8721D[Driver]: association success(res=1)  
[2023-05-10\_17:52:15]wlan1: 1 DL RSVD page success! DLBcnCount:01, poll:00000001  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15]Hard Fault Patch (Non-secure)  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15]Hard Fault:  
[2023-05-10\_17:52:15]Secure State: 0  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15]Stacked:  
[2023-05-10\_17:52:15]R0 = 0x00000000  
[2023-05-10\_17:52:15]R1 = 0x00000000  
[2023-05-10\_17:52:15]R2 = 0x10049a64  
[2023-05-10\_17:52:15]R3 = 0x04d19237  
[2023-05-10\_17:52:15]R12 = 0x00000000  
[2023-05-10\_17:52:15]LR = 0x1000c8b9  
[2023-05-10\_17:52:15]PC = 0x1000f0b6  
[2023-05-10\_17:52:15]PSR = 0x6100000f  
[2023-05-10\_17:52:15]  
[2023-05-10\_17:52:15]Current:  
[2023-05-10\_17:52:15]EXC\_RETURN = 0xffffffb0  
[2023-05-10\_17:52:15]MSP = 0x10004f78  
[2023-05-10\_17:52:15]PSP = 0x1004b068  
[2023-05-10\_17:52:15]xPSR = 0xa0000003  
[2023-05-10\_17:52:15]CFSR = 0x01000000  
[2023-05-10\_17:52:15]HFSR = 0x40000000  
[2023-05-10\_17:52:15]DFSR = 0x00000000  
[2023-05-10\_17:52:15]MMFAR = 0x00000000  
[2023-05-10\_17:52:15]BFAR = 0x00000000  
[2023-05-10\_17:52:15]AFSR = 0x00000000  
[2023-05-10\_17:52:15]PriMask = 0x00000001  
[2023-05-10\_17:52:15]SVC priority: 0x00  
[2023-05-10\_17:52:15]PendSVC priority: 0xe0  
[2023-05-10\_17:52:15]Systick priority: 0xe0  
[2023-05-10\_22:25:36]  
[2023-05-10\_22:25:36]#  
[2023-05-10\_22:25:37]#  
[2023-05-10\_22:25:38]#  
[2023-05-10\_22:25:41]#  
[2023-05-10\_22:25:41]#

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<div class="post-metadata">

**Author:** ![dakamaster](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/dakamaster/32/3588_2.png) [@dakamaster](https://forum.amebaiot.com/u/dakamaster)\
**Post date:** [May 12, 2023, 1:33am UTC](https://forum.amebaiot.com/t/rtl8720df-hard-fault-patch-non-secure/1853/2 "2023-05-12T01:33:20Z")

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@peter 您好，

欢迎加入AmebaIoT论坛，也感谢您使用RTL872x系列。 😀

麻烦请您提供下面的信息以方便工程师帮忙复现并debug：

1. 使用sdk版本号（或下载地址）
2. 造成Hard Fault时使用的范例是什么？
3. 如果没有运行任何范例，请您提供可以复现上述报错的源代码

谢谢