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感觉GPIO引脚不够用，所以想用JTAG的P1.1和P1.2做为GPIO来用，初步尝试设置SEL0+SEL1寄存器，没有成功。请帮忙给点建议怎么设置寄存器。谢谢
P1.1和P1.2和jtag没关系吧
