jtag.h

arm7的JTAG调试工具源码

/*
 * jtag.h : the head file for jtag.c
 * 
 * This head file defines the connection between parallel port and JTAG.
 * Wiggler is supported by defaul. If you want to support other interfaces, 
 * please change the configuration by yourself.
 *
 * Copyright (C) 2004, OPEN-JTAG, All rights reserved.
 */
 

#ifndef XJTAG_JTAG_H
#define XJTAG_JTAG_H

#include "types.h"

#define WIGGLER

/*
 * The followint table shows the pin assignment of 25-pin  Parallel Printer Port. 
 * please refer to IEEE 1284 standard for detailed description.
 * data port (Out)		    status port (In)
 * bit[7] -- pin9 (Out)		bit[7] -- pin11 (In), busy (Hardware Inverted)
 * bit[6] -- pin8 (Out)		bit[6] -- pin10 (In), Ack
 * bit[5] -- pin7 (Out)		bit[5] -- pin12 (In), Paper out
 * bit[4] -- pin6 (Out)		bit[4] -- pin13 (In), Select
 * bit[3] -- pin5 (Out)		bit[3] -- pin15 (In), Error
 * bit[2] -- pin4 (Out)		bit[2] -- IRQ(Not)
 * bit[1] -- pin3 (Out)		bit[1] -- Reserved
 * bit[0] -- pin2 (Out)		bit[0] -- Reserved
 */


/* I/O address of parallet port */
#define PARAL_DATA_PORT 	0x378
#define PARAL_STAT_PORT		0x379
#define PARAL_INIT_DATA		0x0
#define PARAL_PIN_11		0x80	//A special pin (Hardware Inverted)		


/* Connection definition between JTAG & Parallel Port */

#ifdef WIGGLER

//WIGGLER
#define JTAG_NTRST_MASK		0x01 	// Pin2
#define JTAG_TMS_MASK		0x02	// Pin3
#define JTAG_TCK_MASK		0x04	// Pin4
#define JTAG_TDI_MASK		0x08	// Pin5
#define JTAG_TDO_MASK		0x80	// Pin11 Hardware Inverted
	
#else

//SDT JTAG
#define JTAG_NTRST_MASK		0x04 	// Pin4
#define JTAG_TMS_MASK		0x02	// Pin3
#define JTAG_TCK_MASK		0x01	// Pin2
#define JTAG_TDI_MASK		0x40	// Pin8
#define JTAG_TDO_MASK		0x10	// Pin13

#endif

extern int jtag_init(void);
extern int jtag_rd_rdo(void);
extern void jtag_wri_tck(void);
extern void jtag_wri_tms(u8 new_val);
extern void jtag_wri_tdi(u8 new_val);
extern void jtag_wri_ntrst(u8 new_val);



#endif
/* end of jtag.h */