rtt出错时候的输出:
- psr: 0x000b0000
- r00: 0x00000001
- r01: 0x00000000
- r02: 0x00000010
- r03: 0x00000001
- r04: 0x00000000
- r05: 0x00000000
- r06: 0x00000000
- r07: 0x00000000
- r08: 0xdeadbeef
- r09: 0xdeadbeef
- r10: 0xdeadbeef
- r11: 0xdeadbeef
- r12: 0xffffffff
- lr: 0x08003185
- pc: 0x00000000
- hard fault on thread: main
- thread pri status sp stack size max used left tick error
- -------- --- ------- ---------- ---------- ------ ---------- ---
- at_clnt 9 suspend 0x00000100 0x00000800 14% 0x00000005 000
- tshell 20 suspend 0x000000cc 0x00001000 05% 0x00000009 000
- tidle0 31 ready 0x00000074 0x00000400 11% 0x0000001b 000
- main 10 running 0x000003a8 0x00000800 75% 0x00000003 000
- FPU active!
- usage fault:
- SCB_CFSR_UFSR:0x02 INVSTATE
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