在这个函数mmcsd_send_request(card-&gt;host, &amp;req)进入bus fault

发布于 2024-07-16 16:35:21 浏览：300 订阅该版

在SDMMC初始化，执行 mmcsd_detect线程进入mmcsd_send_request(card->host, &req)事就会bus fault

```
msh />clock 0Hz busmode 1 powermode 1 cs 0 Vdd 23 width 0
clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 23 width 0
clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 23 width 0
clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 23 width 0
clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 15 width 0
clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 15 width 0
clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 15 width 0
clock 400000Hz busmode 2 powermode 2 cs 0 Vdd 15 width 0
[I/SDIO] SD card capacity 7761920 KB.
psr: 0x21000200
r00: 0xf00fe019
r01: 0x00000066
r02: 0x010001f7
r03: 0x00000001
r04: 0xdeadbeef
r05: 0xdeadbeef
r06: 0xdeadbeef
r07: 0xdeadbeef
r08: 0xdeadbeef
r09: 0xdeadbeef
r10: 0xdeadbeef
r11: 0xdeadbeef
r12: 0x24002a30
 lr: 0x0803ad75
 pc: 0x0800bcc2
hard fault on thread: mmcsd_detect

thread          pri  status      sp     stack size max used left tick   error  tcb addr
--------------- ---  ------- ---------- ----------  ------  ---------- ------- ----------
tshell           20  suspend 0x0000010c 0x00001000    07%   0x00000009 EINTRPT 0x240064b8
mmcsd_detect     22  running 0x00000368 0x00000800    42%   0x00000009 OK      0x24002328
tidle0           31  ready   0x00000074 0x00000100    54%   0x0000000f OK      0x240020b0
timer             4  suspend 0x000000cc 0x00000200    39%   0x00000009 EINTRPT 0x24000800
main             10  suspend 0x00000184 0x00000800    58%   0x00000002 EINTRPT 0x24003f98
FPU active!
bus fault:
SCB_CFSR_BFSR:0x04 IMPRECISERR
```