大家好,请教下,dm365的usb当做devices,连接PC机时,怎么实现DM365原本所接的SD卡
数据被PC机直接读取?
就好像我们现在使用的手机都支持的,USB接PC机,直接拷贝手机里的SD卡数据。
什么原理?主要是软件上还是硬件处理?
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谢谢!我还是有点疑问。我看DM365芯片资料里面写着
USB Port with Integrated 2.0 High-Speed PHY
that Supports
– USB 2.0 High-Speed Device
– USB 2.0 High-Speed Host (mini-host,
supporting one external device)
– USB On The Go (HS-USB OTG)
它不是支持OTG吗,那它不就是可以当USB slave从设备与PCUSB host接口连接吗?
在TMS320DM36x DMSoC Universal Serial Bus User's Guide.pdf这份文档里具体写到
3 USB Controller Host and Peripheral Modes Operation
The USB controller can be used in a range of different environments. It can be used as either a
high-speed or a full-speed USB peripheral device attached to a conventional USB host (such as a PC). It
can be used as either host or peripheral device in point-to-point data transfers with another peripheral
device - or, if the other device also contains a Dual-Role Controller, the two devices can switch roles as
required. (This second device may be either a high-speed, full-speed or low-speed USB function.) Or the
controller can be used as the host to a range of such peripheral devices in a multi-point setup.