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7x256,EMAC 将要使用7x256的网友注意了,它的数据手册EMAC部分的错误
问
本人在调试过程中发现AT91SAM7x256的数据手册EMAC部分存在错误,网络状态寄存器(EMAC_NSR)的IDLE位应该是置位表明PHY芯片工作结束,复位表明正在运行,但是它的数据手册正好相反(数据手册569页),本人的调试已经证明这点,希望各位网友注意。不过在数据手册的功能描述部分的PHY维护一节(559页),它对此的描述到是正确的,原文如下:
The PHY maintenance register is implemented as a shift register. Writing to the register starts a
shift operation which is signalled as complete when bit two is set in the network status register
(about 2000 MCK cycles later when bit ten is set to zero, and bit eleven is set to one in the network
configuration register).
看来ATMEL的人员做事也不是太严谨^_^,不过瑕不掩瑜,它的手册相对来说还是比较简介明了的。 答 1: Ding... 答 2: 研究一下,感谢龙一的无私奉献! 答 3: 学习了
The PHY maintenance register is implemented as a shift register. Writing to the register starts a
shift operation which is signalled as complete when bit two is set in the network status register
(about 2000 MCK cycles later when bit ten is set to zero, and bit eleven is set to one in the network
configuration register).
看来ATMEL的人员做事也不是太严谨^_^,不过瑕不掩瑜,它的手册相对来说还是比较简介明了的。 答 1: Ding... 答 2: 研究一下,感谢龙一的无私奉献! 答 3: 学习了
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1/1 1 跳转至页
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