Description

Configure endpoint with buffer to receive data.

Files

Every device driver’s usbd_drv.c

Prototype

static  CPU_INT32U  USBD_DrvEP_RxStart (USBD_DRV    *p_drv,
                  	                    CPU_INT08U   ep_addr,
                                		CPU_INT08U  *p_buf,
                                		CPU_INT32U   buf_len,
                                		USBD_ERR    *p_err);

Arguments

p_drv

Pointer to USB device driver structure.

ep_addr

Endpoint address.

p_buf

Pointer to data buffer.

buf_len

Length of the buffer.

p_err

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

Returned Value

Maximum number of octets that will be received, if NO error(s).

0, otherwise.

Callers

USB device core layer.

Notes / Warnings

1. Typically, the function to configure the endpoint receive transaction performs the following operations:
   1. Determine maximum transaction length, given the specified length of the buffer (buf_len).
   2. Setup receive transaction.