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am335利用GPMC DMA方式传送FPGA数据错误

Other Parts Discussed in Thread: SN74LVC16T245

am335的代码是参考这个写的:www.cnblogs.com/.../4122609.html

FPGA检测GPMC输出的OE信号,每来一次OE的下降沿,将16位数据输出,读取的数据是正确的,但有时候会出现下面数据漏掉的现象

用signaltap看发现漏掉的地方会出现一次短暂的OE信号,这个应该不会有的,使得后面的输出全部错位,具体如下: