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发表于 2017-11-14 10:02:58
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谢谢大神的回复,之前我用 STM32F207ZG 和 072RB 等 MCU 都没遇到问题,唯独使用 STM32F411RE 这一个型号有此问题。
今天终于发现问题所在了,因线接的太长,导致 SWCLK 移位了。在缩短接线和降速后就恢复了正常。
这件事儿让你费心了,谢谢哈!
Device "STM32F411RE" selected.
Connecting to target via SWD
Found SW-DP with ID 0x2BA01477
Found SW-DP with ID 0x2BA01477
Scanning AP map to find all available APs
AP[1]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 003BB002 DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 002BB003 FPB
ROMTbl[0][3]: E0000000, CID: B105E00D, PID: 003BB001 ITM
ROMTbl[0][4]: E0040000, CID: B105900D, PID: 000BB9A1 TPIU
ROMTbl[0][5]: E0041000, CID: B105900D, PID: 000BB925 ETM
Cortex-M4 identified.
J-Link>w4 0x20000000 12345678
Writing 12345678 -> 20000000
J-Link>mem32 0x20000000 4
20000000 = 12345678 F0009900 E7F9F993 304046EC
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