多串口设备同时工作死机

发布于 2021-05-25 15:28:04 浏览：1561 订阅该版

[tocm]

项目上遇到的奇怪问题，两个月了没有进展，发这里大家支支招。
## 硬件平台
GD32F450VGT6（和STM32F407架构一样，用的STM32F407的HAL库）
## RTT版本
3.1.5
## 问题描述
我的系统上有5个串口设备，1-DEBUG口  2-串口屏  3-无  4-串口WIFI模块  5-串口电表  6-刷卡板，现在只要屏和WIFI同时工作，系统跑十个小时左右就会死机，有时候打印hardFault后死机，有时候连打印都没有直接挂死。
但是，只单独跑其中一个模块一点问题没有。我试过把WIFI模块去掉跑72小时没死，或者把屏去掉跑72小时也没事，其他串口设备保持工作状态。不知道是不是因为GD的库和STM32的库在串口上有差别，对照datasheet寄存器也没看出有啥特别的不同。
下面是hardFault的一个Log。有哪位大神遇到同样问题的给个思路，谢了！
```
r00: 0x20001af8
r01: 0x00000800
r02: 0x2101e9d4
r03: 0x2000e338
r04: 0x00000800
r05: 0x20003148
r06: 0x00000000
r07: 0x00000000
r08: 0x080b2828
r09: 0x20001af8
r10: 0x00000000
r11: 0x00000000
r12: 0xffffffff
 lr: 0x080aa9c7
 pc: 0x080ac4f2
hard fault on thread: main

thread   pri  status      sp     stack size max used left tick  error
-------- ---  ------- ---------- ----------  ------  ---------- ---
pt02      24  ready   0x00000530 0x00001000    53%   0x00000003 000
pt01      24  suspend 0x00000224 0x00002000    29%   0x00000002 000
pt00      24  ready   0x00000170 0x00000c00    59%   0x00000003 -02
tshell    20  suspend 0x0000020c 0x00001000    50%   0x00000006 000
esp_net   16  suspend 0x000001f8 0x00000800    67%   0x0000000d 000
at_clnt    9  suspend 0x000000f8 0x00000600    70%   0x00000004 000
sys_work  23  suspend 0x0000010c 0x00000800    66%   0x00000001 000
phy       30  ready   0x000000bc 0x00000200    36%   0x00000001 -02
tcpip     10  suspend 0x000000f0 0x00000400    58%   0x00000008 000
etx       12  suspend 0x000000b0 0x00000400    17%   0x0000000d 000
erx       12  suspend 0x000000b8 0x00000400    17%   0x00000010 000
tidle     31  ready   0x00000080 0x00000400    19%   0x00000004 000
main      10  ready   0x00000240 0x00001000    48%   0x00000010 000
FPU active!
bus fault:
SCB_CFSR_BFSR:0x82 PRECISERR SCB->BFAR:A4088A88
```
### 问题追加
刚开始我也很怀疑是内存不够了，专门打了内存信息出来，下面LOG是出问题前的内存信息。我的MCU内存是192K的，应该是够用的。
```
I/ocpprpc  [05-23 00:53:12] ocpp16.c....pt02---301...prebuffer=1024
I/ocpprpc  [05-23 00:53:12] ocpp16.c....pt02---305
I/ocpprpc  [05-23 00:53:12] >>> [2,"1621731192190","MeterValues",{"connectorId":1,"transactionId":16313,"meterValue":[{"timestamp":"2021-23T00:53:12Z","sampledValue":[{"value":"15520","context":"Sample.Periodic","measurand":"Energy.Active.Import.Register","unit":"Wh"},{"val:"0.9","context":"Sample.Periodic","measurand":"Current.Import","unit":"A"},{"value":"232.6","context":"Sample.Periodic","measurand":"Vole","unit":"V"},{"value":"51","context":"Sample.Periodic","measurand":"Temperature"}]}]}]
I/websocket [05-23 00:53:12] >>>>>> rws send 484 bytes
I/websocket [05-23 00:53:13] <<<<<<< rws recv 24 bytes
I/ocpprpc  [05-23 00:53:14] <<< [3,"1621731192190",{}]
I/ocpp16   [05-23 00:54:13] ocpp16.c.............Heartbeat1()
total memory: 187644
used memory : 92804
maximum allocated memory: 98556
available memory: 94840

memory heap address:
heap_ptr: 0x200022e4
lfree   : 0x2000d944
heap_end: 0x2002fff0
I/ocpprpc  [05-23 00:54:13] ocpp16.c....pt02---301...prebuffer=1024
I/ocpprpc  [05-23 00:54:13] ocpp16.c....pt02---305
I/ocpprpc  [05-23 00:54:13] >>> [2,"162173125396","Heartbeat",{}]
I/websocket [05-23 00:54:13] >>>>>> rws send 39 bytes
I/websocket [05-23 00:54:14] <<<<<<< rws recv 59 bytes
I/ocpprpc  [05-23 00:54:14] <<< [3,"162173125396",{"currentTime":"2021-05-23T00:54:16Z"}]
psr: 0x81000000
r00: 0x31333631
r01: 0x00000000
r02: 0x00000001
r03: 0x2000e400
r04: 0x00000000
r05: 0x20001b00
r06: 0x00000001
r07: 0x40030134
r08: 0x00000012
r09: 0x20001b00
r10: 0xa0000000
r11: 0x406d1999
r12: 0xa0da3332
 lr: 0x080abbdf
 pc: 0x080ad0b8
hard fault on thread: pt02

thread   pri  status      sp     stack size max used left tick  error
-------- ---  ------- ---------- ----------  ------  ---------- ---
pt03      24  suspend 0x0000032c 0x00000c00    62%   0x00000003 000
pt02      24  ready   0x0000041c 0x00001000    64%   0x00000005 000
pt01      24  suspend 0x00000198 0x00002000    30%   0x00000001 000
pt00      24  suspend 0x00000170 0x00000c00    53%   0x00000005 000
tshell    20  suspend 0x00000210 0x00001000    47%   0x00000006 000
ec20_net  16  suspend 0x00000204 0x00000800    64%   0x00000013 000
at_clnt    9  suspend 0x000000f8 0x00000600    70%   0x00000001 000
sys_work  23  suspend 0x0000010c 0x00000800    50%   0x00000007 000
phy       30  suspend 0x000000bc 0x00000200    47%   0x00000002 000
tcpip     10  suspend 0x000000f0 0x00000400    89%   0x00000006 000
etx       12  suspend 0x000000ac 0x00000400    17%   0x0000000e 000
erx       12  suspend 0x000000b4 0x00000400    62%   0x00000005 000
tidle     31  ready   0x00000064 0x00000400    12%   0x00000002 000
main      10  suspend 0x00000368 0x00001000    51%   0x00000002 000
FPU active!
bus fault:
SCB_CFSR_BFSR:0x82 PRECISERR SCB->BFAR:31333631
```