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急，求解，OMAPL138，串口1 跑38400报overrun错误，如何提高性能
Linux arago 2.6.33-rc4 #37 PREEMPT Fri Nov 18 00:53:33 PST 2016 armv5tejl unknown
http://www.deyisupport.com/question_answer/dsp_arm/omap_l1x/f/54/t/120130.aspx
