/*	LPCUSB, an USB device driver for LPC microcontrollers		Copyright (C) 2006 Bertrik Sikken (bertrik@sikken.nl)	Redistribution and use in source and binary forms, with or without	modification, are permitted provided that the following conditions are met:	1. Redistributions of source code must retain the above copyright	   notice, this list of conditions and the following disclaimer.	2. Redistributions in binary form must reproduce the above copyright	   notice, this list of conditions and the following disclaimer in the	   documentation and/or other materials provided with the distribution.	3. The name of the author may not be used to endorse or promote products	   derived from this software without specific prior written permission.	THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 	INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*//*	This is a very simple custom device (not belonging to a specific USB	class). It implements primitive read and write in the ARM memory space.		Each transfer is initiated by a control transfer to inform the device	about the address and size of the following data transfer.	The data transfer takes place over a bulk endpoint (BULK_IN_EP for	reads and BULK_OUT_EP for writes).	This example can be used to measure USB transfer speed.*/#include "type.h"#include "usbdebug.h"#include "console.h"#include "usbapi.h"#include "startup.h"#define BULK_IN_EP		0x82#define BULK_OUT_EP		0x05#define MAX_PACKET_SIZE	64#define LE_WORD(x)		((x)&0xFF),((x)>>8)static const U8 abDescriptors[] = {/* Device descriptor */	0x12,              			DESC_DEVICE,       			LE_WORD(0x0200),		// bcdUSB		0xFF,              		// bDeviceClass	0x00,              		// bDeviceSubClass	0x00,              		// bDeviceProtocol	MAX_PACKET_SIZE0,  		// bMaxPacketSize	LE_WORD(0xFFFF),		// idVendor	LE_WORD(0x0004),		// idProduct	LE_WORD(0x0100),		// bcdDevice	0x01,              		// iManufacturer	0x02,              		// iProduct	0x03,              		// iSerialNumber	0x01,              		// bNumConfigurations// configuration	0x09,	DESC_CONFIGURATION,	LE_WORD(0x20),  		// wTotalLength	0x01,  					// bNumInterfaces	0x01,  					// bConfigurationValue	0x00,  					// iConfiguration	0x80,  					// bmAttributes	0x32,  					// bMaxPower// interface	0x09,   					DESC_INTERFACE, 	0x00,  		 			// bInterfaceNumber	0x00,   				// bAlternateSetting	0x02,   				// bNumEndPoints	0xFF,   				// bInterfaceClass	0x00,   				// bInterfaceSubClass	0x00,   				// bInterfaceProtocol	0x00,   				// iInterface// bulk in	0x07,   			DESC_ENDPOINT,   			BULK_IN_EP,				// bEndpointAddress	0x02,   				// bmAttributes = BULK	LE_WORD(MAX_PACKET_SIZE),// wMaxPacketSize	0,						// bInterval   		// bulk out	0x07,   			DESC_ENDPOINT,   			BULK_OUT_EP,			// bEndpointAddress	0x02,   				// bmAttributes = BULK	LE_WORD(MAX_PACKET_SIZE),// wMaxPacketSize	0,						// bInterval   		// string descriptors	0x04,	DESC_STRING,	LE_WORD(0x0409),	// manufacturer string	0x0E,	DESC_STRING,	'L', 0, 'P', 0, 'C', 0, 'U', 0, 'S', 0, 'B', 0,	// product string	0x1A,	DESC_STRING,	'M', 0, 'e', 0, 'm', 0, 'o', 0, 'r', 0, 'y', 0, 'A', 0, 'c', 0, 'c', 0, 'e', 0, 's', 0, 's', 0,	// serial number string	0x12,	DESC_STRING,	'D', 0, 'E', 0, 'A', 0, 'D', 0, 'C', 0, '0', 0, 'D', 0, 'E', 0,		// terminator	0};typedef struct {	U32		dwAddress;	U32		dwLength;} TMemoryCmd;static TMemoryCmd	MemoryCmd;static U8			abVendorReqData[sizeof(TMemoryCmd)];static void _HandleBulkIn(U8 bEP, U8 bEPStatus){	int iChunk;		iChunk = MIN(MAX_PACKET_SIZE, MemoryCmd.dwLength);	if (iChunk == 0) {		DBG("done\n");		return;	}		// send next part	USBHwEPWrite(bEP, (U8 *)MemoryCmd.dwAddress, iChunk);		MemoryCmd.dwAddress += iChunk;	MemoryCmd.dwLength -= iChunk;	// limit address range to prevent abort	MemoryCmd.dwAddress &= ~(-512 * 1024);}static void _HandleBulkOut(U8 bEP, U8 bEPStatus){	int iChunk;		// get next part	iChunk = USBHwEPRead(bEP, NULL, 0);		MemoryCmd.dwAddress += iChunk;	MemoryCmd.dwLength -= iChunk;		if (MemoryCmd.dwLength == 0) {		DBG("done\n");	}}/*************************************************************************	HandleVendorRequest	===================		Handles vendor specific requests			Control transfer fields:	* request:	0x01 = prepare memory read				0x02 = prepare memory write	* index:	ignored	* value:	ignored	* data:		U32 dwAddress				U32 dwLength		**************************************************************************/static BOOL HandleVendorRequest(TSetupPacket *pSetup, int *piLen, U8 **ppbData){	TMemoryCmd	*pCmd;		pCmd = (TMemoryCmd *)*ppbData;	switch (pSetup->bRequest) {		// prepare read	case 0x01:		MemoryCmd = *pCmd;		DBG("READ: addr=%X, len=%d\n", MemoryCmd.dwAddress, MemoryCmd.dwLength);		// send initial packet		_HandleBulkIn(BULK_IN_EP, 0);		*piLen = 0;		break;			// prepare write	case 0x02:		MemoryCmd = *pCmd;		DBG("WRITE: addr=%X, len=%d\n", MemoryCmd.dwAddress, MemoryCmd.dwLength);		*piLen = 0;		break;	default:		DBG("Unhandled class %X\n", pSetup->bRequest);		return FALSE;	}	return TRUE;}#define BAUD_RATE	115200/*************************************************************************	main	====**************************************************************************/int main(void){	// PLL and MAM	Initialize();	// init DBG	ConsoleInit(60000000 / (16 * BAUD_RATE));	DBG("Initialising USB stack\n");		// initialise stack	USBInit();		// register device descriptors	USBRegisterDescriptors(abDescriptors);	// override standard request handler	USBRegisterRequestHandler(REQTYPE_TYPE_VENDOR, HandleVendorRequest, abVendorReqData);	// register endpoints	USBHwRegisterEPIntHandler(BULK_IN_EP, _HandleBulkIn);	USBHwRegisterEPIntHandler(BULK_OUT_EP, _HandleBulkOut);	DBG("Starting USB communication\n");	// connect to bus	USBHwConnect(TRUE);	// call USB interrupt handler continuously	while (1) {		USBHwISR();	}		return 0;}