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我现在在uboot模式下，我的gpio3_14连了一个led灯，想点亮它，只有操作寄存器去点亮它，但是我找不到gpio3_14的寄存器地址，能否告知在哪找，还有用什么命令去实现此功能，谢谢
请参考TRM25.4的GPIO寄存器描述
请看下这里：http://e2e.ti.com/support/arm/sitara_arm/f/791/t/194443.aspx
