Silicon Laboratories SiM3U1xx Manual de usuario descargar pdf (Pagina 7)

AN758

Rev. 0.1 7

5. Detailed List of Functions

This section discusses the detailed function declarations in the CDC USB stack firmware example.

5.1. CDC Functions

This section focuses on the functions found in the CDCClassDevice.c and CDCClassDevice.h files

(AN758_USB_CDC\src\LUFA\Drivers\USB\Class\Device directory). This file implements the USB CDC device

class.

5.1.1. CDC_Device_Process_ControlRequest

Handle USB CDC special class request.

Syntax

void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* const

CDCInterfaceInfo)

Parameters

CDCInterfaceInfo: Pointer to CDC Class state structure

Return Value

None

Description

This function parses the USB control request to handle different USB CDC special class request. Update

CDCInterfaceInfo with data from USB host, or send data in CDCInterfaceInfo to USB host.

Example

USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =

{

.Config =

{

.ControlInterfaceNumber = 0,

.DataINEndpoint =

{

.Address = CDC_TX_EPADDR,

.Size = CDC_TXRX_EPSIZE,

.Banks = 1,

.DataOUTEndpoint =

{

.Address = CDC_RX_EPADDR,

.Size = CDC_TXRX_EPSIZE,

.Banks = 1,

.NotificationEndpoint =

{

.Address = CDC_NOTIFICATION_EPADDR,

.Size = CDC_NOTIFICATION_EPSIZE,

.Banks = 1,

};

CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);

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Silicon Laboratories SiM3U1xx Manual de usuario Pagina 7

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