自己动手做了一块基于Xilinx XC5VLX110T FPGA的板子，但是在调试过程中遇到JTAG配置问题：使用ChipScope Pro Analyzer对FPGA进行在线配置，ChipScope可以识别芯片型号XC5VLX110T，如附件1图片所示
但点击Configure,配置进度条在100%之后，提示ERROR: Configuration failed或者INFO: Found 0 Core Units in the JTAG device Chain.总之就是配置成功，后来查看Configuration Status(配置寄存器参数)发现其状态总是Bits [31 ..0]: 0000 0000 0000 0000 0000 0000 0000 0000，具体的如下：Bit 31: 0
Bit 30: 0 RBCRC_ERROR
Bit 29: 0 IPROG_EVENT
Bit 28: 0 WRAP_ERROR
Bit 27: 0
Bit 26: 0 BUS_WIDTH
Bit 25: 0 BUS_WIDTH
Bit 24: 0 FS
Bit 23: 0 FS
Bit 22: 0 FS
Bit 21: 0
Bit 20: 0 STARTUP_STATE
Bit 19: 0 STARTUP_STATE
Bit 18: 0 STARTUP_STATE
Bit 17: 0
Bit 16: 0 DEC_ERROR
Bit 15: 0 ID_ERROR
Bit 14: 0 DONE
Bit 13: 0 RELEASE_DONE
Bit 12: 0 INIT_B
Bit 11: 0 INIT_COMPLETE
Bit 10: 0 MODE M2
Bit 9: 0 MODE M1
Bit 8: 0 MODE M0
Bit 7: 0 GHIGH_B
Bit 6: 0 GWE
Bit 5: 0 GTS_CFG_B
Bit 4: 0 EOS
Bit 3: 0 DCI_MATCH
Bit 2: 0 DCM_LOCK
Bit 1: 0 PART_SECURED
Bit 0: 0 CRC_ERROR
然而无论怎么改变FPGA的配置模式引脚M[2:0]的电平，上面紫色字体的模式始终不变，总的状态依然是：Bits [31 ..0]: 0000 0000 0000 0000 0000 0000 0000 0000，我觉得是FPGA的BGA焊接是不是出现了虚焊 ，请各位大神帮忙分析一下具体的原因，感谢大家多多帮忙！
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