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ACM Subclass
L8-3(1)
The class instance number created with USBD_ACM_SerialAdd() will serve
internally to the ACM subclass to route the transfer to the proper bulk OUT or
IN endpoint.
8
L8-3(2)
The application must ensure that the buffer provided to the function is large
enough to accommodate all the data. Otherwise, synchronization issues might
happen.
L8-3(3)
In order to avoid an infinite blocking situation, a timeout expressed in
milliseconds can be specified. A value of ‘0’ makes the application task wait
forever.
L8-3(4)
The application provides the initialized transmit buffer.
8-4-6 USING THE DEMO APPLICATION
Micriμm provides a demo application that lets you test and evaluate the class
implementation. Source template files are provided for the device.
CONFIGURING DEVICE APPLICATION
The serial demo allows you to send and/or receive serial data to and/or from the device
through a virtual COM port. The demo is implemented in the application file,
app_usbd_cdc.c , provided for μC/OS-II and μC/OS-III. app_usbd_cdc.c is located in
these two folders:
■
\Micrium\Software\uC-USB-Device-V4\App\Device\OS\uCOS-II
■
\Micrium\Software\uC-USB-Device-V4\App\Device\OS\uCOS-III
129
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