#ifndef __USBDMA_H__
#define __USBDMA_H__


/* LPC23xx DMA 引擎 DD 描述符結(jié)構(gòu)體  LPC23xx DMA engine DD descriptor structure */
typedef struct non_iso_dd_tag
{
	INT32U next_dd_addr;		/* 下一個(gè)DD地址 			next DD address */
	INT32U control;				/* DD控制字     			DD control word	*/
	INT32U start_addr;			/* DMA 緩沖區(qū)起始地址		DMA buffer start address */
	INT32U status;				/* DMA 引擎狀態(tài)				DMA engine status */
}DD_DESCRIPTOR;



/* 各端點(diǎn) DMA 緩沖區(qū)大小, 用戶可自行修改, 請注意總和不要大于 8K - 0.64K (LPC2148). 
   
   Each endpoint dma buffer size, user can modify it, please note the len can't be above 8K - 0.64K (LPC2148) */

#define EP02_DMA_BUFFER_LENGTH	 	0
#define EP03_DMA_BUFFER_LENGTH	 	0		
#define EP04_DMA_BUFFER_LENGTH	 	3584
#define EP05_DMA_BUFFER_LENGTH	 	3584


#define USB_RAM_ADDRESS 	0x7FD00000 									/* USB RAM 起始地址 	 Start address of USB RAM  */

#define DD_SIZE				sizeof(DD_DESCRIPTOR)						/* DD 結(jié)構(gòu)體大小		 DD size  				   */									

#define DD_BASE_ADDRESS 	(USB_RAM_ADDRESS + (4 * 32))				/* 32: LPC23xx 端點(diǎn)個(gè)數(shù)  32: the endpoint numbers  */
																
#define DD_ADDRESS_EP02		DD_BASE_ADDRESS								/* 物理端點(diǎn)2 DD地址		 DD address of endpoint 02 */
#define DD_ADDRESS_EP03		(DD_BASE_ADDRESS + (DD_SIZE * 1))			/* 物理端點(diǎn)3 DD地址		 DD address of endpoint 03 */
#define DD_ADDRESS_EP04		(DD_BASE_ADDRESS + (DD_SIZE * 2))			/* 物理端點(diǎn)4 DD地址 	 DD address of endpoint 04 */
#define DD_ADDRESS_EP05		(DD_BASE_ADDRESS + (DD_SIZE * 3))			/* 物理端點(diǎn)5 DD地址      DD address of endpoint 05 */


/* DMA 接收和發(fā)送緩沖區(qū)地址  DMA receive/transmit buffer address */ 
#define DMA_BUFFER_ADDR_EP02  	DD_BASE_ADDRESS + (DD_SIZE * 32)					/* 物理端點(diǎn)2 DMA緩沖區(qū)首址 */
#define DMA_BUFFER_ADDR_EP03  	DMA_BUFFER_ADDR_EP02 + EP02_DMA_BUFFER_LENGTH		/* 物理端點(diǎn)3 DMA緩沖區(qū)首址 */
	
#define DMA_BUFFER_ADDR_EP04  	DMA_BUFFER_ADDR_EP03 + EP03_DMA_BUFFER_LENGTH 		/* 物理端點(diǎn)4 DMA緩沖區(qū)首址 */
#define DMA_BUFFER_ADDR_EP05  	DMA_BUFFER_ADDR_EP04 + EP04_DMA_BUFFER_LENGTH		/* 物理端點(diǎn)5 DMA緩沖區(qū)首址 */


/* DMA 狀態(tài)宏定義  DMA status marco define  */
#define DDS_NOT_SERV		0x00
#define DDS_BEING_SERV		0x01

#define DDS_UNDER_RUN		0x03
#define DDS_SYS_ERR			0x09

#define DDS_OVER_RUN		0x11	//DATA over run     1,0001
#define DDS_NORMAL_COMP		0x05	//Normal completion 0,0101


/*
***********************************************************************
*		用戶可使用的API函數(shù)    API Function
***********************************************************************
*/

extern void USB_DMAInit(void);

extern INT32U USB_DMASetTransLength(INT8U endp, INT32U len);

extern void USB_DMAStart_IN(INT8U endp);

extern INT8U* USB_DMAGetBuffer(INT8U endp);


/*
***********************************************************************
*		DMA 中斷服務(wù)程序	 The Interrupt Service of the DMA 
***********************************************************************
*/
extern void USB_DMAService(void);

extern void USB_DMATransferEnd(void);
extern void USB_DMASystemError(void);
extern void USB_DMANewDDRequest(void);


/*
***********************************************************************
*		本文件用到的子程序	 The Subprogram used by this file 
***********************************************************************
*/

extern void USB_InitUdcaTable(void);

extern void USB_InitEndpointDD(INT8U endp);

extern DD_DESCRIPTOR *USB_GetDDPointer(INT8U endp);

#endif