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omap138设置VxWorks GPIO中断

怎么设置VxWorks GPIO bank 3 PIN14中断,需要配置哪些寄存器。目前,有人说,指需要将调用intConneted(),连接到中断好45和中断服务程序,然后再调用intenble(45)就可以了,但是,我发现无法触发中断。按照OMAP138手册的话,应该还要设置PSC和中断控制寄存器。我看了下,寄存器挺多的,有没有例程可以参考。