89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
/*----------------------------------------------------------------------------
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* U S B - K e r n e l
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*----------------------------------------------------------------------------
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* Name: usbcore.h
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* Purpose: USB Core Definitions
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* Version: V1.20
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*----------------------------------------------------------------------------
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* This software is supplied "AS IS" without any warranties, express,
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* implied or statutory, including but not limited to the implied
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* warranties of fitness for purpose, satisfactory quality and
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* noninfringement. Keil extends you a royalty-free right to reproduce
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* and distribute executable files created using this software for use
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* on NXP Semiconductors LPC microcontroller devices only. Nothing else
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* gives you the right to use this software.
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*
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* Copyright (c) 2009 Keil - An ARM Company. All rights reserved.
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*---------------------------------------------------------------------------*/
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#ifndef __USBCORE_H__
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#define __USBCORE_H__
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#include "usbcfg.h"
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/* USB Endpoint Data Structure */
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typedef struct _USB_EP_DATA {
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uint8_t *pData;
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uint16_t Count;
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} USB_EP_DATA;
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/* USB Core Global Variables */
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extern uint16_t USB_DeviceStatus;
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extern uint8_t USB_DeviceAddress;
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volatile extern uint8_t USB_Configuration;
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extern uint32_t USB_EndPointMask;
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extern uint32_t USB_EndPointHalt;
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extern uint32_t USB_EndPointStall;
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extern uint8_t USB_AltSetting[USB_IF_NUM];
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/* USB Endpoint 0 Buffer */
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extern uint8_t EP0Buf[USB_MAX_PACKET0];
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/* USB Endpoint 0 Data Info */
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extern USB_EP_DATA EP0Data;
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/* USB Setup Packet */
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extern USB_SETUP_PACKET SetupPacket;
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/* USB Core Functions */
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extern void USB_ResetCore (void);
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/* Newer C compilers make it really difficult to add
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* an integer to a pointer */
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static inline void UsbAddPtr(void **vpptr, uint32_t n);
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/*
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* Add a number of bytes to a pointer's address
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* Harder than you might think. Some compilers say:
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* Expected an lvalue -- Assignment expects its first operand to be
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* an lvalue. Please note that a cast removes the lvaluedness of an
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* expression.
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*
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* vpptr = void pointer to pointer
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* n = number of bytes to add to pointer
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* Call looks like: AddPtr((void **)&myPointer, 8);
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*/
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static inline void UsbAddPtr(void **vpptr, uint32_t n)
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{
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/* Declare a pointer to a pointer to a byte. Only a byte pointer
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* can be incremented by a number of bytes. Other pointers will
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* increment by a multiple of what they point to.
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*/
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uint8_t **bpptr;
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/* Convert our void pointer to a pointer to a byte pointer to a pointer */
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bpptr = (uint8_t **)vpptr;
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/* Add 'n' bytes to our pointer value */
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(*bpptr) += n;
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}
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#endif /* __USBCORE_H__ */
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