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AM437x StarterWare中,GPIO管脚如何使用?

AM437x EVM的StarterWare的led_blink的例子中,驱动led的pinnum是通过对DEVICE_ID设置的。可是如果我想用其他的pin该怎么做呢,没有类似Gpio0Pin18这样的语句吗?谢谢指导!