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之前都能连接，现在成这样了，求助 Connecting via USB to J-Link device 0 - J-Link firmware: V1.20 (J-Link ARM V8 compiled Aug 24 2011 17:23:32) - JTAG speed: 5 kHz (Fixed) - Initializing CPU core (Init sequence) ... - Initialized successfully - JTAG speed: 1000 kHz (Auto) - ERROR: Bad JTAG communication: Write to IR: Expected 0x1, got 0x0 (TAP Command : 10) @ Off 0xA. Wrong AHB ID (15:3). Expected 0x04770001 (Mask 0x0FFFFF0F), Found 0x00000000 - WARNING: Unexpected core ID. (Found: 0x00000000, Expected: 0x3BA00477, Mask: 0xFFFFFFFF) - J-Link found 1 JTAG device. Core ID: 0x00000000 (ARM9) - ERROR: Failed to connect 求助！！！！！