USB_ReadEP

#include <usbhw.h>

U32 USB_ReadEP (
  U32 EPNum,                     /* Endpoint number and direction */
  U8  *pData);                   /* Pointer to buffer to write to */

The USB_ReadEP function reads data from the USB controller’s endpoint buffer to the local software buffer.

When new data are available, the USB_EndPointNumber function can call USB_ReadEP to obtain the data. The EPNum parameter contains the endpoint number (0-15) in the first 4 bits, and the direction in bit 7. Usually, the direction bit is 0, denoting an OUT endpoint. pData is the pointer to the buffer to store the data received from the endpoint.

It is not required to modify this function.

The USB_ReadEP function is part of the USB Device Controller Driver layer of the RL-USB Software Stack.

The USB_ReadEP function returns the number of bytes read from the endpoint buffer.

USB_EndPointNumber, USB_WriteEP

#include <usbhw.h>

void MSC_BulkOut (void)  {

  BulkLen = USB_ReadEP (MSC_EP_OUT, BulkBuf);
  switch (BulkStage)  {
    case MSC_BS_CBW:
      MSC_GetCBW ();
      break;
   …
  }
}