Added ppiwin.c: Windows parallel port driver.
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk@204 81a1dc3b-b13d-400b-aceb-764788c761c2
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Eric Weddington
parent
31332cf70a
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/*
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* avrdude - A Downloader/Uploader for AVR device programmers
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* Copyright (C) 2003 Eric B. Weddington <eric@umginc.net> or <eric@ecentral.com>
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*
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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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*
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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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*
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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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*/
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/*
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This is the parallel port interface for Windows built using Cygwin.
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In the ppi_* functions that access the parallel port registers,
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fd = parallel port address
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reg = register as defined in an enum in ppi.h. This must be converted
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to a proper offset of the base address.
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*/
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#if defined(__CYGWIN__)
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <windows.h>
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#include "ppi.h"
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extern char *progname;
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#define DEVICE_LPT1 "lpt1"
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#define DEVICE_LPT2 "lpt2"
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#define DEVICE_LPT1ALT "lpt1alt"
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#define DEVICE_MAX 3
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typedef struct
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{
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const char *name;
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int base_address;
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} winpp;
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static const winpp winports[DEVICE_MAX] =
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{
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{DEVICE_LPT1, 0x378},
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{DEVICE_LPT2, 0x278},
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{DEVICE_LPT1ALT, 0x3BC},
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};
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/* FUNCTION PROTOTYPES */
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static int winnt_pp_open(void);
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static unsigned short port_get(int fd, int reg);
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static unsigned char reg2offset(int reg);
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static unsigned char inb(unsigned short port);
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static void outb(unsigned char value, unsigned short port);
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/* FUNCTION DEFINITIONS */
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int ppi_open(char *port)
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{
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unsigned char i;
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int fd;
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fd = winnt_pp_open();
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if(fd < 0)
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{
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fprintf(stderr, "%s: can't open device \"giveio\"\n\n", progname);
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return(-1);
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}
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/* Search the windows port names for a match */
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fd = -1;
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for(i = 0; i < DEVICE_MAX; i++)
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{
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if(strcmp(winports[i].name, port) == 0)
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{
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/* Set the file descriptor with the Windows parallel port base address. */
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fd = winports[i].base_address;
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break;
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}
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}
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if(fd < 0)
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{
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fprintf(stderr, "%s: can't open device \"%s\"\n\n", progname, port);
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return(-1);
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}
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return(fd);
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}
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#define DRIVERNAME "\\\\.\\giveio"
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static int winnt_pp_open(void)
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{
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// Only try to use giveio under Windows NT/2000/XP.
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OSVERSIONINFO ver_info;
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memset(&ver_info, 0, sizeof(ver_info));
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ver_info.dwOSVersionInfoSize = sizeof(ver_info);
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if(!GetVersionEx(&ver_info))
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{
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return(-1);
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}
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else if(ver_info.dwPlatformId == VER_PLATFORM_WIN32_NT)
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{
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HANDLE h = CreateFile(DRIVERNAME,
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GENERIC_READ,
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0,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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if(h == INVALID_HANDLE_VALUE)
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{
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return(-1);
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}
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/* Close immediately. The process now has the rights it needs. */
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if(h != NULL)
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{
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CloseHandle(h);
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}
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}
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return(0);
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}
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void ppi_close(int fd)
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{
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return;
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}
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/*
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* set the indicated bit of the specified register.
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*/
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int ppi_set(int fd, int reg, int bit)
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{
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unsigned char v;
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unsigned short port;
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port = port_get(fd, reg);
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v = inb(port);
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v |= bit;
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outb(v, port);
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return 0;
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}
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/*
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* clear the indicated bit of the specified register.
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*/
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int ppi_clr(int fd, int reg, int bit)
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{
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unsigned char v;
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unsigned short port;
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port = port_get(fd, reg);
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v = inb(port);
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v &= ~bit;
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outb(v, port);
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return 0;
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}
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/*
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* get the indicated bit of the specified register.
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*/
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int ppi_get(int fd, int reg, int bit)
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{
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unsigned char v;
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v = inb(port_get(fd, reg));
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v &= bit;
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return(v);
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}
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/*
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* toggle the indicated bit of the specified register.
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*/
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int ppi_toggle(int fd, int reg, int bit)
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{
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unsigned char v;
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unsigned short port;
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port = port_get(fd, reg);
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v = inb(port);
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v ^= bit;
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outb(v, port);
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return 0;
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}
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/*
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* get all bits of the specified register.
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*/
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int ppi_getall(int fd, int reg)
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{
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unsigned char v;
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v = inb(port_get(fd, reg));
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return((int)v);
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}
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/*
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* set all bits of the specified register to val.
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*/
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int ppi_setall(int fd, int reg, int val)
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{
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outb((unsigned char)val, port_get(fd, reg));
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return 0;
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}
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/* Calculate port address to access. */
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static unsigned short port_get(int fd, int reg)
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{
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return((unsigned short)(fd + reg2offset(reg)));
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}
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/* Convert register enum to offset of base address. */
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static unsigned char reg2offset(int reg)
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{
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unsigned char offset = 0;
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switch(reg)
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{
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case PPIDATA:
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{
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offset = 0;
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break;
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}
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case PPISTATUS:
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{
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offset = 1;
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break;
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}
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case PPICTRL:
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{
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offset = 2;
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break;
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}
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}
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return(offset);
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}
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/* Read in value from port. */
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static unsigned char inb(unsigned short port)
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{
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unsigned char t;
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asm volatile ("in %1, %0"
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: "=a" (t)
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: "d" (port));
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return t;
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}
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/* Write value to port. */
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static void outb(unsigned char value, unsigned short port)
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{
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asm volatile ("out %1, %0"
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:
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: "d" (port), "a" (value) );
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}
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#endif
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