Description
Send data to host through Bulk IN endpoint. This function is blocking.
Files
usbd_vendor.h / usbd_vendor.c
Prototype
Arguments
class_nbr
Class instance number.
p_buf
Pointer to transmit buffer.
buf_len
Transmit buffer length in octets.
timeout
Timeout in milliseconds.
end
End-of-transfer flag.
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_DEV_INVALID_NBR
USBD_ERR_EP_INVALID_NBR
USBD_ERR_DEV_INVALID_STATE
USBD_ERR_EP_INVALID_TYPE
Returned Value
Number of octets sent, if NO error(s).
0, otherwise.
Callers
Application.
Notes / Warnings
If end-of-transfer flag is set and transfer length is multiple of maximum packet size, a zero-length packet is transferred to indicate the end of transfer to the host.