DrviUsARTAROPEN函数很难实现

我想我会警告其他人在Orthon的USAT驱动程序中遇到一个问题。在Hyrn（V1.09）动态USAT设备驱动程序中的“DrviUsARTAROPEN”函数很难实现，文档是误导的。如果我用DRVIIOION ITENTHY写这个函数，那是因为我只想把数据写入设备。然而，“DrviUsARTAROPEN”不检查“DVVIIOION ITENTHORY WORD”，并且配置了用于读取的设备，然后它积极地尝试接收数据，并可能产生停止执行的错误。我已经提交了一个案例，说明如果客户端只通过DRVIIOION ITENTHORY写入，设备将被调用。不能设置为接收，MHC不应该产生额外的冗余代码，这可能需要来自客户端的干预（只希望写入）。



      以下为原文

    Just thought I'd warn others about a problem in HARMony's USART driver.

The 'DRV_USART_Open' function in Harmony's (v1.09) dynamic USART device driver is poorly implemented and the documentation is misleading.

If I call that function with DRV_IO_INTENT_WRITE it's because I only want to WRITE data to the device. However, 'DRV_USART_Open' doesn't check for 'DRV_IO_INTENT_WRITE' and configures the device for reading anyway, then it actively tries receiving data and can generate errors which stop execution.

I've submitted a case suggesting that if the client passes in only DRV_IO_INTENT_WRITE, the device shouldn't be setup up to receive and the MHC shouldn't generate extra redundant code which potentially requires intervention from the client (which is only wanting to write).