USBD_HID_WrAsync

Description

Transmits data to host asynchronously through an interrupt IN endpoint.

Files

usbd_hid.h/usbd_hid.c

Prototype

void  USBD_HID_WrAsync (CPU_INT08U            class_nbr,
                        void                 *p_buf,
                        CPU_INT32U            buf_len,
                        USBD_HID_ASYNC_FNCT   async_fnct,
                        void                 *p_async_arg,
                        USBD_ERR             *p_err);

Arguments

class_nbr

Class instance number.

p_buf

Pointer to transmit buffer.

buf_len

Transmit buffer length, in octets.

async_fnct

Transmit callback.

p_async_arg

Additional argument provided by application for transmit callback.

p_err

Pointer to variable that will receive the return error code from this function.

USBD_ERR_NONE                   

USBD_ERR_NULL_PTR               

USBD_ERR_INVALID_ARG            

USBD_ERR_INVALID_CLASS_STATE    

USBD_ERR_FAIL                   

USBD_ERR_DEV_INVALID_NBR        

USBD_ERR_EP_INVALID_NBR         

USBD_ERR_DEV_INVALID_STATE      

USBD_ERR_EP_INVALID_TYPE        

USBD_ERR_EP_INVALID_STATE

Returned Value

None.

Callers

Application.

Notes / Warnings

This function is non-blocking and returns immediately after transfer preparation. Upon transfer completion, the callback provided is called to notify the application.