cls.get_last_error

#include <RTL.h>
#include <rl_usb.h>
#include "usb_for_lib.h"

U32 GetLastError (
  U8 ctrl,
  U8 dev_idx
);

The GetLastError function returns the last error that happened on requested dev_idx device instance on requested ctrl USB Host Controller.

You can modify this function to suit different class driver. This function will need to be changed for class that does not have driver provided.

The GetLastError function returns one of the following manifest constants.

• ERROR_SUCCESS
  Success.
• ERROR_USBH_HCI
  Indicates that requested host controller instance is invalid.
• ERROR_USBH_HCD
  Indicates that requested host controller driver instance is invalid.
• ERROR_USBH_DCD
  Indicates that requested device class driver instance is invalid.
• ERROR_USBH_MEM_ALLOC
  Indicates that memory block was not allocated.
• ERROR_USBH_MEM_DEALLOC
  Indicates that memory block was not deallocated.
• ERROR_USBH_PINS_CONFIG
  Indicates that pins were not configured.
• ERROR_USBH_INIT
  Indicates that host controller hardware was not initialized.
• ERROR_USBH_PORT_POWER
  Indicates that port was not powered on/off.
• ERROR_USBH_PORT_RESET
  Indicates that port was not reset.
• ERROR_USBH_EP_ADD
  Indicates that endpoint was not added.
• ERROR_USBH_EP_CONFIG
  Indicates that endpoint was not configured.
• ERROR_USBH_EP_REMOVE
  Indicates that endpoint was not removed.
• ERROR_USBH_URB_SUBMIT
  Indicates that transfer was not submitted.
• ERROR_USBH_URB_CANCEL
  Indicates that transfer was not cancelled.
• ERROR_USBH_URB_TRANSFER
  Indicates that transfer has failed due to transfer error.
• ERROR_USBH_URB_TOUT
  Indicates that transfer has failed due to timeout.
• ERROR_USBH_ENUMERATE
  Indicates that connected device was not enumerated.
• ERROR_USBH_UNINIT_DEVS
  Indicates that disconnected device resources were not uninitialized.
• ERROR_USBH_MSC
  Indicates that requested mass storage device instance is invalid.
• ERROR_USBH_MSC_SIG
  Indicates that mass storage device returned wrong signature in command status word.
• ERROR_USBH_MSC_TAG
  Indicates that mass storage device returned wrong tag in command status word.
• ERROR_USBH_MSC_RESID
  Indicates that mass storage device returned residue in command status word.
• ERROR_USBH_HID
  Indicates that requested human interface device instance is invalid.
• ERROR_USBH_CLS
  Indicates that requested custom device instance is invalid.

cls.config, cls.init, cls.unconfig, cls.uninit

/* MSC Class Driver Control Block */
USBH_DCD usbh_dcd_cls = {
  USB_DEVICE_CLASS_STORAGE,
  Config,
  UnConfig,
  Init,
  UnInit,
  GetLastError
};

static U32 GetLastError (U8 ctrl, U8 dev_idx) {

  return (usbh_dci_msc[ctrl*usbh_msc_num+dev_idx].LastError);
}