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https://github.com/mariusgreuel/avrdude.git
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In lieu of Michael Holzt, add his serbb serial bit-bang code so it
will be available in the upcoming avrdude release. His addition has been implemented by means of a generalized bit-bang interface that contains the common part between serial and paralle bit-bang devices, and specialed backends for the serial and parallel port connections. git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@515 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Joerg Wunsch
271
serbb_posix.c
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271
serbb_posix.c
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/*
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* avrdude - A Downloader/Uploader for AVR device programmers
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* Copyright (C) 2000, 2001, 2002, 2003 Brian S. Dean <bsd@bsdhome.com>
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* Copyright (C) 2005 Michael Holzt <kju-avr@fqdn.org>
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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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/* $Id$ */
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/*
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* Posix serial bitbanging interface for avrdude.
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*/
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#if !defined(WIN32NATIVE)
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#include "ac_cfg.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 <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#include "avr.h"
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#include "pindefs.h"
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#include "pgm.h"
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#include "bitbang.h"
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#undef DEBUG
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extern char *progname;
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struct termios oldmode;
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/*
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serial port/pin mapping
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1 cd <-
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2 rxd <-
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3 txd ->
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4 dtr ->
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5 dsr <-
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6 rts ->
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7 cts <-
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*/
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int serregbits[] =
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{ TIOCM_CD, 0, 0, TIOCM_DTR, TIOCM_DSR, TIOCM_RTS, TIOCM_CTS };
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#ifdef DEBUG
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char *serpins[7] =
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{ "CD", "RXD", "TXD ~RESET", "DTR MOSI", "DSR", "RTS SCK", "CTS MISO" };
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#endif
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void serbb_setpin(int fd, int pin, int value)
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{
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unsigned int ctl;
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if (pin & PIN_INVERSE)
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{
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value = !value;
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pin &= PIN_MASK;
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}
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if ( pin < 1 || pin > 7 )
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return;
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pin--;
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#ifdef DEBUG
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printf("%s to %d\n",serpins[pin],value);
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#endif
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switch ( pin )
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{
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case 2: /* txd */
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ioctl(fd, value ? TIOCSBRK : TIOCCBRK, 0);
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return;
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case 3: /* dtr, rts */
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case 5: ioctl(fd, TIOCMGET, &ctl);
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if ( value )
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ctl |= serregbits[pin];
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else
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ctl &= ~(serregbits[pin]);
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ioctl(fd, TIOCMSET, &ctl);
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return;
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default: /* impossible */
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return;
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}
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}
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int serbb_getpin(int fd, int pin)
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{
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unsigned int ctl;
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unsigned char invert;
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if (pin & PIN_INVERSE)
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{
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invert = 1;
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pin &= PIN_MASK;
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} else
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invert = 0;
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if ( pin < 1 || pin > 7 )
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return(-1);
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pin --;
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switch ( pin )
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{
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case 1: /* rxd, currently not implemented, FIXME */
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return(-1);
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case 0: /* cd, dsr, dtr, rts, cts */
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case 3:
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case 4:
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case 5:
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case 6: ioctl(fd, TIOCMGET, &ctl);
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if ( !invert )
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{
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#ifdef DEBUG
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printf("%s is %d\n",serpins[pin],(ctl & serregbits[pin]) ? 1 : 0 );
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#endif
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return ( (ctl & serregbits[pin]) ? 1 : 0 );
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}
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else
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{
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#ifdef DEBUG
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printf("%s is %d (~)\n",serpins[pin],(ctl & serregbits[pin]) ? 0 : 1 );
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#endif
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return (( ctl & serregbits[pin]) ? 0 : 1 );
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}
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default: /* impossible */
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return(-1);
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}
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}
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int serbb_highpulsepin(int fd, int pin)
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{
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if (pin < 1 || pin > 7)
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return -1;
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serbb_setpin(fd, pin, 1);
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#if SLOW_TOGGLE
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usleep(1000);
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#endif
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serbb_setpin(fd, pin, 0);
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#if SLOW_TOGGLE
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usleep(1000);
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#endif
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return 0;
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}
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void serbb_display(PROGRAMMER *pgm, char *p)
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{
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/* MAYBE */
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}
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void serbb_enable(PROGRAMMER *pgm)
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{
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/* nothing */
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}
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void serbb_disable(PROGRAMMER *pgm)
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{
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/* nothing */
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}
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void serbb_powerup(PROGRAMMER *pgm)
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{
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/* nothing */
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}
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void serbb_powerdown(PROGRAMMER *pgm)
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{
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/* nothing */
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}
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int serbb_open(PROGRAMMER *pgm, char *port)
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{
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struct termios mode;
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int flags;
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/* adapted from uisp code */
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pgm->fd = open(port, O_RDWR | O_NOCTTY | O_NONBLOCK);
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if ( pgm->fd > 0 )
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{
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tcgetattr(pgm->fd, &mode);
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oldmode = mode;
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cfmakeraw(&mode);
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mode.c_iflag &= ~(INPCK | IXOFF | IXON);
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mode.c_cflag &= ~(HUPCL | CSTOPB | CRTSCTS);
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mode.c_cflag |= (CLOCAL | CREAD);
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mode.c_cc [VMIN] = 1;
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mode.c_cc [VTIME] = 0;
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tcsetattr(pgm->fd, TCSANOW, &mode);
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/* Clear O_NONBLOCK flag. */
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flags = fcntl(pgm->fd, F_GETFL, 0);
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if (flags == -1)
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{
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fprintf(stderr, "%s: Can not get flags\n", progname);
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return(-1);
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}
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flags &= ~O_NONBLOCK;
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if (fcntl(pgm->fd, F_SETFL, flags) == -1)
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{
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fprintf(stderr, "%s: Can not clear nonblock flag\n", progname);
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return(-1);
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}
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}
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return(0);
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}
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void serbb_close(PROGRAMMER *pgm)
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{
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tcsetattr(pgm->fd, TCSADRAIN, &oldmode);
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return;
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}
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void serbb_initpgm(PROGRAMMER *pgm)
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{
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strcpy(pgm->type, "SERBB");
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pgm->rdy_led = bitbang_rdy_led;
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pgm->err_led = bitbang_err_led;
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pgm->pgm_led = bitbang_pgm_led;
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pgm->vfy_led = bitbang_vfy_led;
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pgm->initialize = bitbang_initialize;
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pgm->display = serbb_display;
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pgm->enable = serbb_enable;
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pgm->disable = serbb_disable;
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pgm->powerup = serbb_powerup;
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pgm->powerdown = serbb_powerdown;
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pgm->program_enable = bitbang_program_enable;
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pgm->chip_erase = bitbang_chip_erase;
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pgm->cmd = bitbang_cmd;
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pgm->open = serbb_open;
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pgm->close = serbb_close;
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/* this is a serial port bitbang device */
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pgm->flag = 1;
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}
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#endif /* WIN32NATIVE */
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