1 /* Monitor JTAG signals instead of using physical cable
2
3 Copyright (C) 2004 Andrew Rogers
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
18
19
20
21 #include <stdio.h>
22
23 #include "iodebug.h"
24
25 using namespace std;
26
txrx(bool tms,bool tdi)27 bool IODebug::txrx(bool tms, bool tdi)
28 {
29 int tdo;
30 fprintf(stderr, "txrx(%d,%d) enter tdo>",tms,tdi);
31 scanf("%d",&tdo);
32 return tdo!=0;
33 }
34
tx(bool tms,bool tdi)35 void IODebug::tx(bool tms, bool tdi)
36 {
37 fprintf(stderr, "tx(%d,%d)\n",tms,tdi);
38
39 }
40
tx_tdi_byte(unsigned char tdi_byte)41 void IODebug::tx_tdi_byte(unsigned char tdi_byte) {
42 }
txrx_block(const unsigned char * tdi,unsigned char * tdo,int length,bool last)43 void IODebug::txrx_block(const unsigned char *tdi, unsigned char *tdo,
44 int length, bool last)
45 {
46 int i=0;
47 int j=0;
48 unsigned char tdo_byte=0;
49 unsigned char tdi_byte=tdi[j];
50 while(i<length-1){
51 tdo_byte=tdo_byte+(txrx(false, (tdi_byte&1)==1)<<(i%8));
52 tdi_byte=tdi_byte>>1;
53 i++;
54 if((i%8)==0){ // Next byte
55 tdo[j]=tdo_byte; // Save the TDO byte
56 tdo_byte=0;
57 j++;
58 tdi_byte=tdi[j]; // Get the next TDI byte
59 }
60 };
61 tdo_byte=tdo_byte+(txrx(last, (tdi_byte&1)==1)<<(i%8));
62 tdo[j]=tdo_byte;
63 return;
64 }
65
tx_tms(unsigned char * pat,int length,int force)66 void IODebug::tx_tms(unsigned char *pat, int length, int force)
67 {
68 int i;
69 unsigned char tms = pat[0];
70 for (i = 0; i < length; i++)
71 {
72 tx((tms & 0x01),false);
73 tms = tms >> 1;
74 }
75 }
76