Silicon Laboratories SiM3U1xx Manual do Utilizador descarregar pdf (Página 8)

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8 Rev. 0.1

5.1.2. CDC_Device_ConfigureEndpoints

USB CDC device endpoint configuration.

Syntax

bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* const

CDCInterfaceInfo)

Parameters

CDCInterfaceInfo: Pointer to CDC Class state structure

Return Value

True: if configuration success

False: if configuration failure

Description

This functions set data in/out endpoint as bulk type, and set notification endpoint as interrupt type.

Example

bool ConfigSuccess = true;

ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);

5.1.3. CDC_Device_SendData

USB CDC sends data to USB IN FIFO.

Syntax

uint8_t CDC_Device_SendData(USB_ClassInfo_CDC_Device_t* const CDCInter-faceInfo,

const char* const Buffer,const uint16_t Length)

Parameters

CDCInterfaceInfo: Pointer to CDC Class state structure

Buffer: Pointer to data buffer

Length: Transmit length

Return Value

Error code: definition can be found in EndpointStream.h

ENDPOINT_RWSTREAM_NoError

ENDPOINT_RWSTREAM_EndpointStalled

ENDPOINT_RWSTREAM_DeviceDisconnected

ENDPOINT_RWSTREAM_BusSuspended

ENDPOINT_RWSTREAM_Timeout

ENDPOINT_RWSTREAM_IncompleteTransfer

Description

This function sends data to USB IN FIFO. Transmit data size specified in Length.

Note: Endpoint_ClearIN() must be called to send data to USB host, otherwise, the data will keep in USB device FIFO.

Example

uint32_t recv_count;

recv_count = uart_get_data(in_buff);

if(recv_count)

{

CDC_Device_SendData(&VirtualSerial_CDC_Interface, (char *)in_buff, recv_count);

Endpoint_ClearIN();

}

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