patch #7165 Add support for bitbanging GPIO lines using the Linux sysf GPIO interface
* doc/avrdude.texi,avrdude.1: added doc for linuxgpio * avrdude.conf.in: added template for linuxgpio programmer * config_gram.y: pin numbers restricted to [PIN_MIN, PIN_MAX] * pindefs.h: added PIN_MIN, PIN_MAX, removed unused LED_ON/OFF * configure.ac: configure option enable-linuxgpio, print of enabled options * linuxgpio.[ch]: new source for linuxgpio programmer * Makefile.am: added linuxgpio to sources list * pgm_type.c: added linuxgpio to programmer types list git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1132 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
rliebscher
parent
1b8fc9897d
commit
8d6f310736
12
ChangeLog
12
ChangeLog
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@ -1,3 +1,15 @@
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2013-01-09 Rene Liebscher <R.Liebscher@gmx.de>
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patch #7165 Add support for bitbanging GPIO lines using the Linux sysf GPIO interface
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* doc/avrdude.texi,avrdude.1: added doc for linuxgpio
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* avrdude.conf.in: added template for linuxgpio programmer
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* config_gram.y: pin numbers restricted to [PIN_MIN, PIN_MAX]
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* pindefs.h: added PIN_MIN, PIN_MAX, removed unused LED_ON/OFF
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* configure.ac: configure option enable-linuxgpio, print of enabled options
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* linuxgpio.[ch]: new source for linuxgpio programmer
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* Makefile.am: added linuxgpio to sources list
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* pgm_type.c: added linuxgpio to programmer types list
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2013-01-08 Joerg Wunsch <j.gnu@uriah.heep.sax.de>
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* jtagmkI.c (jtagmkI_prmsg): replace a putchar() by putc(...stderr)
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@ -31,6 +31,7 @@ EXTRA_DIST = \
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ChangeLog-2009 \
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ChangeLog-2010 \
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ChangeLog-2011 \
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ChangeLog-2012 \
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avrdude.1 \
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avrdude.spec \
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bootstrap
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@ -123,6 +124,8 @@ libavrdude_a_SOURCES = \
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jtag3.c \
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jtag3.h \
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jtag3_private.h \
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linuxgpio.c \
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linuxgpio.h \
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linux_ppdev.h \
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lists.c \
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lists.h \
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4
NEWS
4
NEWS
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@ -14,6 +14,10 @@ Current:
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- ATmega256RFR2, ATmega128RFR2, ATmega64RFR2
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* New programmers supported:
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- linuxgpio
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+ any (embedded) Linux system with 4 GPIOs available can be used
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as a programmer with little or no additional hardware.
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- avrftdi
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+ o-link (patch #7672 adding support for O-Link (FTDI based
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JTAG) as programmer)
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12
avrdude.1
12
avrdude.1
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@ -98,6 +98,18 @@ port.
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Connecting to a serial port emulated on top of USB is likely to not
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work at all, or to work abysmally slow.
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.Pp
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If you happen to have a Linux system with at least 4 hardware GPIOs
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available (like almost all embedded Linux boards) you can do without
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any additional hardware - just connect them to the MOSI, MISO, RESET
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and SCK pins on the AVR and use the linuxgpio programmer type. It bitbangs
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the lines using the Linux sysfs GPIO interface. Of course, care should
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be taken about voltage level compatibility. Also, although not strictrly
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required, it is strongly advisable to protect the GPIO pins from
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overcurrent situations in some way. The simplest would be to just put
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some resistors in series or better yet use a 3-state buffer driver like
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the 74HC244. Have a look at http://kolev.info/avrdude-linuxgpio for a more
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detailed tutorial about using this programmer type.
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.Pp
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Atmel's STK500 programmer is also supported and connects to a serial
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port.
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Both, firmware versions 1.x and 2.x can be handled, but require a
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@ -1142,7 +1142,28 @@ programmer
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@HAVE_PARPORT_END@
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#This programmer bitbangs GPIO lines using the Linux sysfs GPIO interface
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#
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#To enable it set the configuration below to match the GPIO lines connected to the
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#relevant ISP header pins and uncomment the entry definition. In case you don't
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#have the required permissions to edit this system wide config file put the
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#entry in a separate <your name>.conf file and use it with -C+<your name>.conf
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#on the command line.
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#
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#To check if your avrdude build has support for the linuxgpio programmer compiled in,
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#use -c?type on the command line and look for linuxgpio in the list. If it's not available
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#you need pass the --enable-linuxgpio=yes option to configure and recompile avrdude.
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#
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#programmer
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# id = "linuxgpio";
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# desc = "Use the Linux sysfs interface to bitbang GPIO lines";
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# type = "linuxgpio";
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# reset = ?;
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# sck = ?;
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# mosi = ?;
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# miso = ?;
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#;
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# some ultra cheap programmers use bitbanging on the
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# serialport.
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#
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@ -1346,11 +1346,11 @@ static int assign_pin(int pinno, TOKEN * v, int invert)
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value = v->value.number;
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free_token(v);
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if ((value <= 0) || (value >= 18)) {
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if ((value < PIN_MIN) || (value > PIN_MAX)) {
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fprintf(stderr,
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"%s: error at line %d of %s: pin must be in the "
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"range 1-17\n",
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progname, lineno, infile);
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"range %d-%d\n",
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progname, lineno, infile, PIN_MIN, PIN_MAX);
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exit(1);
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}
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if (invert)
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39
configure.ac
39
configure.ac
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@ -272,6 +272,18 @@ AC_ARG_ENABLE(
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esac],
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[enabled_parport=yes])
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AC_ARG_ENABLE(
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[linuxgpio],
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AC_HELP_STRING(
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[--enable-linuxgpio],
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[Enable the Linux sysfs GPIO interface programmer type]),
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[case "${enableval}" in
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yes) enabled_linuxgpio=yes ;;
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no) enabled_linuxgpio=no ;;
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*) AC_MSG_ERROR(bad value ${enableval} for enable-linuxgpio option) ;;
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esac],
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[enabled_linuxgpio=no])
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DIST_SUBDIRS_AC='doc windows'
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if test "$enabled_doc" = "yes"; then
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@ -340,6 +352,15 @@ else
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confsubst="-e /^@HAVE_PARPORT_BEGIN@/,/^@HAVE_PARPORT_END@/d"
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fi
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if test "$enabled_linuxgpio" = "yes"; then
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AC_DEFINE(HAVE_LINUXGPIO, 1, [Linux sysfs GPIO support enabled])
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confsubst="$confsubst -e /^@HAVE_LINUXGPIO_/d"
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else
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confsubst="$confsubst -e /^@HAVE_LINUXGPIO_BEGIN@/,/^@HAVE_LINUXGPIO_END@/d"
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fi
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# If we are compiling with gcc, enable all warning and make warnings errors.
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if test "$GCC" = yes; then
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ENABLE_WARNINGS="-Wall"
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@ -479,3 +500,21 @@ else
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echo "DON'T HAVE pthread"
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fi
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if test x$enabled_doc = xyes; then
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echo "ENABLED doc"
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else
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echo "DISABLED doc"
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fi
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if test x$enabled_parport = xyes; then
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echo "ENABLED parport"
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else
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echo "DISABLED parport"
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fi
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if test x$enabled_linuxgpio = xyes; then
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echo "ENABLED linuxgpio"
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else
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echo "DISABLED linuxgpio"
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fi
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@ -168,6 +168,18 @@ attached to a physical serial port. Connecting to a serial port
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emulated on top of USB is likely to not work at all, or to work
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abysmally slow.
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If you happen to have a Linux system with at least 4 hardware GPIOs
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available (like almost all embedded Linux boards) you can do without
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any additional hardware - just connect them to the MOSI, MISO, RESET
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and SCK pins on the AVR and use the linuxgpio programmer type. It bitbangs
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the lines using the Linux sysfs GPIO interface. Of course, care should
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be taken about voltage level compatibility. Also, although not strictrly
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required, it is strongly advisable to protect the GPIO pins from
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overcurrent situations in some way. The simplest would be to just put
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some resistors in series or better yet use a 3-state buffer driver like
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the 74HC244. Have a look at http://kolev.info/avrdude-linuxgpio for a more
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detailed tutorial about using this programmer type.
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The STK500, JTAG ICE, avr910, and avr109/butterfly use the serial port to communicate with the PC.
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The STK600, JTAG ICE mkII, AVRISP mkII, USBasp, avrftdi (and derivitives), and USBtinyISP
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programmers communicate through the USB, using @code{libusb} as a
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@ -0,0 +1,349 @@
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/*
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* avrdude - A Downloader/Uploader for AVR device programmers
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* Support for bitbanging GPIO pins using the /sys/class/gpio interface
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*
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* Copyright (C) 2013 Radoslav Kolev <radoslav@kolev.info>
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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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#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 "avrdude.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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#if HAVE_LINUXGPIO
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/*
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* GPIO user space helpers
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*
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* Copyright 2009 Analog Devices Inc.
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* Michael Hennerich (hennerich@blackfin.uclinux.org)
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*
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* Licensed under the GPL-2 or later
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*/
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/*
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* GPIO user space helpers
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* The following functions are acting on an "unsigned gpio" argument, which corresponds to the
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* gpio numbering scheme in the kernel (starting from 0).
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* The higher level functions use "int pin" to specify the pins with an offset of 1:
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* gpio = pin - 1;
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*/
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#define GPIO_DIR_IN 0
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#define GPIO_DIR_OUT 1
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static int linuxgpio_export(unsigned int gpio)
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{
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int fd, len, r;
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char buf[11];
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fd = open("/sys/class/gpio/export", O_WRONLY);
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if (fd < 0) {
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perror("Can't open /sys/class/gpio/export");
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return fd;
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}
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len = snprintf(buf, sizeof(buf), "%d", gpio);
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r = write(fd, buf, len);
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close(fd);
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return r;
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}
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static int linuxgpio_unexport(unsigned int gpio)
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{
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int fd, len, r;
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char buf[11];
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fd = open("/sys/class/gpio/unexport", O_WRONLY);
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if (fd < 0) {
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perror("Can't open /sys/class/gpio/unexport");
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return fd;
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}
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len = snprintf(buf, sizeof(buf), "%d", gpio);
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r = write(fd, buf, len);
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close(fd);
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return r;
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}
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static int linuxgpio_openfd(unsigned int gpio)
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{
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char filepath[60];
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snprintf(filepath, sizeof(filepath), "/sys/class/gpio/gpio%d/value", gpio);
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return (open(filepath, O_RDWR));
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}
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static int linuxgpio_dir(unsigned int gpio, unsigned int dir)
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{
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int fd, r;
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char buf[60];
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snprintf(buf, sizeof(buf), "/sys/class/gpio/gpio%d/direction", gpio);
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fd = open(buf, O_WRONLY);
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if (fd < 0) {
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perror("Can't open gpioX/direction");
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return fd;
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}
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if (dir == GPIO_DIR_OUT)
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r = write(fd, "out", 4);
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else
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r = write(fd, "in", 3);
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close(fd);
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return r;
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}
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static int linuxgpio_dir_out(unsigned int gpio)
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{
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return linuxgpio_dir(gpio, GPIO_DIR_OUT);
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}
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static int linuxgpio_dir_in(unsigned int gpio)
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{
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return linuxgpio_dir(gpio, GPIO_DIR_IN);
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}
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/*
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* End of GPIO user space helpers
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*/
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#define N_GPIO (PIN_MAX + 1)
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/*
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* an array which holds open FDs to /sys/class/gpio/gpioXX/value for all needed pins
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*/
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static int linuxgpio_fds[N_GPIO] ;
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static int linuxgpio_setpin(PROGRAMMER * pgm, int pin, int value)
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{
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int r;
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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 ( linuxgpio_fds[pin] < 0 )
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return -1;
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if (value)
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r = write(linuxgpio_fds[pin], "1", 1);
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else
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r = write(linuxgpio_fds[pin], "0", 1);
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if (r!=1) return -1;
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if (pgm->ispdelay > 1)
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bitbang_delay(pgm->ispdelay);
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return 0;
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}
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static int linuxgpio_getpin(PROGRAMMER * pgm, int pin)
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{
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unsigned char invert=0;
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char c;
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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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}
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if ( linuxgpio_fds[pin] < 0 )
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return -1;
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if (lseek(linuxgpio_fds[pin], 0, SEEK_SET)<0)
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return -1;
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if (read(linuxgpio_fds[pin], &c, 1)!=1)
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return -1;
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if (c=='0')
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return 0+invert;
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else if (c=='1')
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return 1-invert;
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else
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return -1;
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}
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static int linuxgpio_highpulsepin(PROGRAMMER * pgm, int pin)
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{
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if ( linuxgpio_fds[pin & PIN_MASK] < 0 )
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return -1;
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linuxgpio_setpin(pgm, pin, 1);
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linuxgpio_setpin(pgm, pin, 0);
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return 0;
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}
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static void linuxgpio_display(PROGRAMMER *pgm, const char *p)
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{
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/* MAYBE */
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}
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static void linuxgpio_enable(PROGRAMMER *pgm)
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{
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/* nothing */
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}
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static void linuxgpio_disable(PROGRAMMER *pgm)
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{
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/* nothing */
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}
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static void linuxgpio_powerup(PROGRAMMER *pgm)
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{
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/* nothing */
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}
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static void linuxgpio_powerdown(PROGRAMMER *pgm)
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{
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/* nothing */
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}
|
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|
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static int linuxgpio_open(PROGRAMMER *pgm, char *port)
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{
|
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int r, i, pin;
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|
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bitbang_check_prerequisites(pgm);
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|
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|
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for (i=0; i<N_GPIO; i++)
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linuxgpio_fds[i] = -1;
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//Avrdude assumes that if a pin number is 0 it means not used/available
|
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//this causes a problem because 0 is a valid GPIO number in Linux sysfs.
|
||||
//To avoid annoying off by one pin numbering we assume SCK, MOSI, MISO
|
||||
//and RESET pins are always defined in avrdude.conf, even as 0. If they're
|
||||
//not programming will not work anyway. The drawbacks of this approach are
|
||||
//that unwanted toggling of GPIO0 can occur and that other optional pins
|
||||
//mostry LED status, can't be set to GPIO0. It can be fixed when a better
|
||||
//solution exists.
|
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for (i=0; i<N_PINS; i++) {
|
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if ( pgm->pinno[i] != 0 ||
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i == PIN_AVR_RESET ||
|
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i == PIN_AVR_SCK ||
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i == PIN_AVR_MOSI ||
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i == PIN_AVR_MISO ) {
|
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pin = pgm->pinno[i] & PIN_MASK;
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if ((r=linuxgpio_export(pin)) < 0) {
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fprintf(stderr, "Can't export GPIO %d, already exported/busy?: %s",
|
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pin, strerror(errno));
|
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return r;
|
||||
}
|
||||
if (i == PIN_AVR_MISO)
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r=linuxgpio_dir_in(pin);
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else
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r=linuxgpio_dir_out(pin);
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||||
|
||||
if (r < 0)
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return r;
|
||||
|
||||
if ((linuxgpio_fds[pin]=linuxgpio_openfd(pin)) < 0)
|
||||
return linuxgpio_fds[pin];
|
||||
}
|
||||
}
|
||||
|
||||
return(0);
|
||||
}
|
||||
|
||||
static void linuxgpio_close(PROGRAMMER *pgm)
|
||||
{
|
||||
int i, reset_pin;
|
||||
|
||||
reset_pin = pgm->pinno[PIN_AVR_RESET] & PIN_MASK;
|
||||
|
||||
//first configure all pins as input, except RESET
|
||||
//this should avoid possible conflicts when AVR firmware starts
|
||||
for (i=0; i<N_GPIO; i++) {
|
||||
if (linuxgpio_fds[i] >= 0 && i != reset_pin) {
|
||||
close(linuxgpio_fds[i]);
|
||||
linuxgpio_dir_in(i);
|
||||
linuxgpio_unexport(i);
|
||||
}
|
||||
}
|
||||
//configure RESET as input, if there's external pull up it will go high
|
||||
if (linuxgpio_fds[reset_pin] >= 0) {
|
||||
close(linuxgpio_fds[reset_pin]);
|
||||
linuxgpio_dir_in(reset_pin);
|
||||
linuxgpio_unexport(reset_pin);
|
||||
}
|
||||
}
|
||||
|
||||
void linuxgpio_initpgm(PROGRAMMER *pgm)
|
||||
{
|
||||
strcpy(pgm->type, "linuxgpio");
|
||||
|
||||
pgm->rdy_led = bitbang_rdy_led;
|
||||
pgm->err_led = bitbang_err_led;
|
||||
pgm->pgm_led = bitbang_pgm_led;
|
||||
pgm->vfy_led = bitbang_vfy_led;
|
||||
pgm->initialize = bitbang_initialize;
|
||||
pgm->display = linuxgpio_display;
|
||||
pgm->enable = linuxgpio_enable;
|
||||
pgm->disable = linuxgpio_disable;
|
||||
pgm->powerup = linuxgpio_powerup;
|
||||
pgm->powerdown = linuxgpio_powerdown;
|
||||
pgm->program_enable = bitbang_program_enable;
|
||||
pgm->chip_erase = bitbang_chip_erase;
|
||||
pgm->cmd = bitbang_cmd;
|
||||
pgm->open = linuxgpio_open;
|
||||
pgm->close = linuxgpio_close;
|
||||
pgm->setpin = linuxgpio_setpin;
|
||||
pgm->getpin = linuxgpio_getpin;
|
||||
pgm->highpulsepin = linuxgpio_highpulsepin;
|
||||
pgm->read_byte = avr_read_byte_default;
|
||||
pgm->write_byte = avr_write_byte_default;
|
||||
}
|
||||
|
||||
const char linuxgpio_desc[] = "GPIO bitbanging using the Linux sysfs interface";
|
||||
|
||||
#else /* !HAVE_LINUXGPIO */
|
||||
|
||||
void linuxgpio_initpgm(PROGRAMMER * pgm)
|
||||
{
|
||||
fprintf(stderr,
|
||||
"%s: Linux sysfs GPIO support not available in this configuration\n",
|
||||
progname);
|
||||
}
|
||||
|
||||
const char linuxgpio_desc[] = "GPIO bitbanging using the Linux sysfs interface (not available)";
|
||||
|
||||
#endif /* HAVE_LINUXGPIO */
|
||||
|
|
@ -0,0 +1,36 @@
|
|||
/*
|
||||
* avrdude - A Downloader/Uploader for AVR device programmers
|
||||
* Copyright (C) 2013 Radoslav Kolev <radoslav@kolev.info>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
/* $Id: par.h 722 2007-01-24 22:43:46Z joerg_wunsch $ */
|
||||
|
||||
#ifndef linuxgpio_h
|
||||
#define linuxgpio_h
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
extern const char linuxgpio_desc[];
|
||||
void linuxgpio_initpgm (PROGRAMMER * pgm);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
|
@ -38,6 +38,7 @@
|
|||
#include "jtagmkI.h"
|
||||
#include "jtagmkII.h"
|
||||
#include "jtag3.h"
|
||||
#include "linuxgpio.h"
|
||||
#include "par.h"
|
||||
#include "pickit2.h"
|
||||
#include "ppi.h"
|
||||
|
|
@ -74,6 +75,7 @@ const PROGRAMMER_TYPE const programmers_types[] = {
|
|||
{"jtagice3_pdi", jtag3_pdi_initpgm, jtag3_pdi_desc},
|
||||
{"jtagice3_dw", jtag3_dw_initpgm, jtag3_dw_desc},
|
||||
{"jtagice3_isp", stk500v2_jtag3_initpgm, stk500v2_jtag3_desc},
|
||||
{"linuxgpio", linuxgpio_initpgm, linuxgpio_desc},
|
||||
{"par", par_initpgm, par_desc},
|
||||
{"pickit2", pickit2_initpgm, pickit2_desc},
|
||||
{"serbb", serbb_initpgm, serbb_desc},
|
||||
|
|
|
|||
|
|
@ -38,8 +38,7 @@ enum {
|
|||
};
|
||||
#define PIN_MASK (UINT_MAX>>1)
|
||||
#define PIN_INVERSE (~(PIN_MASK)) /* flag for inverted pin in serbb */
|
||||
|
||||
#define LED_ON(fd,pin) ppi_setpin(fd,pin,0)
|
||||
#define LED_OFF(fd,pin) ppi_setpin(fd,pin,1)
|
||||
#define PIN_MIN 1 /* smallest allowed pin number */
|
||||
#define PIN_MAX 255 /* largest allowed pin number */
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue