图2 - 8。在一个二级总线上对于一个设备的读请求的流程。
Figure 2-8. The flow of a read request for a device on a secondary bus.
用一个控制器硬件去识别总线请求并允许请求设备去访问总线。
A single hardware control unit will recognize a request and grant access to the bus to a requesting device.
通过“远程帧”发送请求，动态地获取各条总线上监测模块的信息，实时监测蓄电池设备。
The monitor station sends out the "the long-distance frame" to obtain dynamically an information of monitor module for battery in the each bus and monitors the battery equipments in good time.
在一个二级总线上对于一个设备的读请求的流程。
USB功能驱动程序由设备开发者编写，位于USB总线驱动程序的上层，通过向USB总线驱动程序发送USB请求包，来实现对USB设备信息的发送或接收。
USB Function device driver is designed by client, it lies the up layer of USB Bus device driver, it sends and receives information from USB device by send URB to USB Bus device driver.
USB功能驱动程序由设备开发者编写，位于USB总线驱动程序的上层，通过向USB总线驱动程序发送USB请求包，来实现对USB设备信息的发送或接收。
USB Function device driver is designed by client, it lies the up layer of USB Bus device driver, it sends and receives information from USB device by send URB to USB Bus device driver.
应用推荐