mirror of
git://projects.qi-hardware.com/nn-usb-fpga.git
synced 2025-01-06 03:50:14 +02:00
a7c692d3f0
Adding FPGA sram hdl code and user space code Fixing some errors: LCD's pinout connector is swapped FPGA TDI SIGNAL must be routed to another pin (C14), right now is DQMH Remove R11 Check JZ4725 symbol's component (PORTD is wrong) Adding PB2 and PB3 wiring ADC's vref to external connector Adding power LED Adding CPU Led
120 lines
2.7 KiB
C++
120 lines
2.7 KiB
C++
/* JTAG GNU/Linux parport device io
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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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#include <stdio.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <linux/parport.h>
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#include <linux/ppdev.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include "ioparport.h"
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using namespace std;
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void IOParport::delay(int del)
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{
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struct timeval actualtime, endtime;
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gettimeofday( &actualtime, NULL );
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endtime.tv_usec=(actualtime.tv_usec+del)% 1000000;
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endtime.tv_sec=actualtime.tv_sec+(actualtime.tv_usec+del)/1000000;
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while(1){
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gettimeofday( &actualtime, NULL );
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if ( actualtime.tv_sec > endtime.tv_sec )
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return;
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if ( actualtime.tv_sec == endtime.tv_sec )
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if ( actualtime.tv_usec > endtime.tv_usec )
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return;
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}
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}
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IOParport::IOParport(const char *device_name) : IOBase()
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{
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fd = open (device_name, O_RDWR);
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if (fd == -1) {
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//perror ("open");
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error=true;
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return;
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}
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if (ioctl (fd, PPCLAIM)) {
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perror ("PPCLAIM");
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close (fd);
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error=true;
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return;
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}
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// Switch to compatibility mode.
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int mode = IEEE1284_MODE_COMPAT;
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if (ioctl (fd, PPNEGOT, &mode)) {
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perror ("PPNEGOT");
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close (fd);
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error=true;
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return;
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}
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error=false;
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}
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bool IOParport::txrx(bool tms, bool tdi)
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{
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unsigned char ret;
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unsigned char data=0x10; // D4 pin5 TDI enable
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if(tdi)data|=1; // D0 pin2
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if(tms)data|=4; // D2 pin4
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ioctl(fd, PPWDATA, &data);
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//delay(2);
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data|=2; // clk high D1 pin3
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ioctl(fd, PPWDATA, &data);
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ioctl(fd, PPRSTATUS, &ret);
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//delay(2);
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//data=data^2; // clk low
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//ioctl(fd, PPWDATA, &data);
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//delay(2);
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//ioctl(fd, PPRSTATUS, &ret);
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return (ret&0x10)!=0; // TDO pin13
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}
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void IOParport::tx(bool tms, bool tdi)
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{
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unsigned char data=0x10; // D4 pin5 TDI enable
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if(tdi)data|=1; // D0 pin2
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if(tms)data|=4; // D2 pin4
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ioctl(fd, PPWDATA, &data);
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//delay(2);
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data|=2; // clk high D1 pin3
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ioctl(fd, PPWDATA, &data);
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//delay(2);
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//data=data^2; // clk low
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//ioctl(fd, PPWDATA, &data);
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//delay(2);
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}
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IOParport::~IOParport()
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{
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ioctl (fd, PPRELEASE);
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close (fd);
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}
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