stm32 hartfault PRECISERR

发布于 2020-12-07 17:57:33 浏览：1706 订阅该版

在运行一段时间过后出现的问题：
```
psr: 0x01000000
r00: 0x00000000
r01: 0xffffffff
r02: 0x00008aa4
r03: 0x2b00687b
r04: 0x00000176
r05: 0xdeadbeef
r06: 0xdeadbeef
r07: 0x2000b930
r08: 0xdeadbeef
r09: 0xdeadbeef
r10: 0xdeadbeef
r11: 0xdeadbeef
r12: 0x00000064
 lr: 0x08001ef5
 pc: 0x08003dd0
hard fault on thread: uch_rq_t

thread   pri  status      sp     stack size max used left tick  error
-------- ---  ------- ---------- ----------  ------  ---------- ---
uch_rq_t   9  running 0x00000110 0x00000a00    69%   0x00000005 000
udpsch_t  10  ready   0x0000014c 0x00000400    71%   0x00000005 000
mqtt0     20  ready   0x000001aa 0x000017e2    21%   0x00000001 -02
tshell    10  suspend 0x00000180 0x00001000    09%   0x00000009 000
wiz_stat  28  ready   0x000000b8 0x00000800    16%   0x00000013 -02
wiz        5  suspend 0x000000a8 0x00000200    68%   0x00000013 000
ntp_sync  26  suspend 0x000000a0 0x00000600    94%   0x00000001 000
sys_work  10  suspend 0x00000084 0x00000800    63%   0x00000004 000
tidle0    31  ready   0x00000058 0x00000100    50%   0x00000004 000
timer      4  suspend 0x000000a8 0x00000200    37%   0x00000009 000
main      10  suspend 0x000000c0 0x00001000    61%   0x0000000e 000
bus fault:
SCB_CFSR_BFSR:0x82 PRECISERR SCB->BFAR:2B00687B
```
我通过PC寄存器的值定位map文件的指向的是 rt_malloc这个接口。但是怎么确定是rt_malloc发生了什么问题
![Dingtalk_20201207175146.jpg](/uploads/20201207/53d23442018645c5ac0d08339d7e4b45.jpg)