ezusb_jtag.h

linux下的jtag调试软件

/*
 * This file is part of Jelie,
 * (c) 2002 Julien Pilet <[e-mail]> and
 * Stephane Magnenat <[e-mail]>
 *
 * Jelie is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * Jelie is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Foobar; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*! \file
 *
 * This is the definition of the JTAG controller
 *
 * \author Julien Pilet <[e-mail]>
 * \author Stephane Magnenat <[e-mail]>
 */

#ifndef __EZUSB_JTAG_H
#define __EZUSB_JTAG_H

#include "ezusb_loader.h"
#include "jtag.h"

//! The implementation of JTAG Control for EzUSB
/*! This class inherits from JTAGControl as it's
	purprose is to implement a JTAG interface.
	It also inherits from EzUSB so all program upload
	facilities are already here. */
class EzUSBJTAG: public EzUSB, public JTAGControl
{
protected:
	//! Method used internally to send and receive a buffer
	void writeAndReadBuffer(unsigned char *buffer, int toWrite, int toRead, unsigned long delay=0);

	//! interneal queu for message queuing
	unsigned char queue[64];

	//! internal position in queu
	int queuePos;

public:
	//! The constructor, call EzUSB's one with empty file name and install signal handlers
	EzUSBJTAG();

	//! The destructor, remove signal handlers
	virtual ~EzUSBJTAG();

	//! Initialize the link with the connection device.
	// \return true on success, false on error.
	virtual bool init(int argc, char **argv);

	//! Read and write the jtag instruction register.
	virtual void ireg(unsigned char *data);

	//! Read and write the jtag data register.
	//
	// \param data a pointer to a buffer which will be exchanged with the
	// JTAG data register.
	// \param length number of bits to read/write.
	virtual void dreg(unsigned char *data, unsigned char length, bool writeOnly=false);

	//! Put the JTAG in run test/idle mode
	virtual void jtagReset(void);

	//! Assert or deassert the cpu reset line.
	virtual void cpuReset(bool state);

	//! Assert or deassert the TRST (the JTAG Reset line)
	virtual void trst(bool state);

	//! Idle for some TCKs in the run test/idle state.
	virtual void idle(unsigned int nbTCK);

	//! Flush the jtag write only command queue
	virtual void flushQueue(void);

	virtual const char *getName(void) const { return "ezusb"; }
};

#endif