Hardware Design: SIE
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1 | /* JTAG routines |
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 | #ifndef JTAG_H |
22 | #define JTAG_H |
23 | |
24 | #include <vector> |
25 | #include <stdio.h> |
26 | |
27 | #include "iobase.h" |
28 | |
29 | typedef unsigned char byte; |
30 | |
31 | class Jtag |
32 | { |
33 | private: |
34 | static const int MAXNUMDEVICES=1000; |
35 | protected: |
36 | struct chainParam_t |
37 | { |
38 | unsigned long idcode; // Store IDCODE |
39 | //byte bypass[4]; // The bypass instruction. Most instruction register lengths are a lot less than 32 bits. |
40 | int irlen; // instruction register length. |
41 | }; |
42 | std::vector<chainParam_t> devices; |
43 | IOBase *io; |
44 | int numDevices; |
45 | IOBase::tapState_t postDRState; |
46 | IOBase::tapState_t postIRState; |
47 | int deviceIndex; |
48 | FILE *logfile; |
49 | bool shiftDRincomplete; |
50 | public: |
51 | Jtag(IOBase *iob); |
52 | int getChain(); // Shift IDCODEs from devices |
53 | inline void setPostDRState(IOBase::tapState_t s){postDRState=s;} |
54 | inline void setPostIRState(IOBase::tapState_t s){postIRState=s;} |
55 | int setDeviceIRLength(int dev, int len); |
56 | unsigned long getDeviceID(int dev){ |
57 | if(dev>=devices.size())return 0; |
58 | return devices[dev].idcode; |
59 | } |
60 | int selectDevice(int dev); |
61 | void shiftDR(const byte *tdi, byte *tdo, int length, int align=0, bool exit=true);// Some devices use TCK for aligning data, for example, Xilinx FPGAs for configuration data. |
62 | void shiftIR(const byte *tdi, byte *tdo=0); // No length argumant required as IR length specified in chainParam_t |
63 | inline void longToByteArray(unsigned long l, byte *b){ |
64 | b[0]=(byte)(l&0xff); |
65 | b[1]=(byte)((l>>8)&0xff); |
66 | b[2]=(byte)((l>>16)&0xff); |
67 | b[3]=(byte)((l>>24)&0xff); |
68 | } |
69 | inline unsigned long byteArrayToLong(byte *b){ |
70 | return (b[3]<<24)+(b[2]<<16)+(b[1]<<8)+b[0]; |
71 | } |
72 | }; |
73 | |
74 | #endif //JTAG_H |
75 |
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