mirror of
git://projects.qi-hardware.com/nn-usb-fpga.git
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66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
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/* JTAG low level functions and base class for cables
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Copyright (C) 2004 Andrew Rogers
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#ifndef IOBASE_H
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#define IOBASE_H
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class IOBase
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{
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public:
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enum tapState_t{
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TEST_LOGIC_RESET=0,
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RUN_TEST_IDLE=1,
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SELECT_DR_SCAN=2,
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CAPTURE_DR=3,
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SHIFT_DR=4,
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EXIT1_DR=5,
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PAUSE_DR=6,
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EXIT2_DR=7,
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UPDATE_DR=8,
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SELECT_IR_SCAN=9,
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CAPTURE_IR=10,
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SHIFT_IR=11,
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EXIT1_IR=12,
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PAUSE_IR=13,
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EXIT2_IR=14,
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UPDATE_IR=15,
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UNKNOWN=999
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};
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protected:
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tapState_t current_state;
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virtual bool txrx(bool tms, bool tdi){}
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virtual void tx(bool tms, bool tdi){}
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int nextTapState(bool tms);
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public:
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IOBase();
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virtual int shiftTDITDO(const unsigned char *tdi, unsigned char *tdo, int length, bool last=true);
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virtual int shiftTDI(const unsigned char *tdi, int length, bool last=true);
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virtual int shiftTDO(unsigned char *tdo, int length, bool last=true);
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virtual int shift(bool tdi, int length, bool last=true);
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virtual int setTapState(tapState_t state);
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virtual void tapTestLogicReset();
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virtual void cycleTCK(int n, bool tdi=1);
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};
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#endif // IOBASE_H
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