| 1 |
27 |
unneback |
# {{{ Banner
|
| 2 |
|
|
|
| 3 |
|
|
# ============================================================================
|
| 4 |
|
|
#
|
| 5 |
|
|
# watchdog.tcl
|
| 6 |
|
|
#
|
| 7 |
|
|
# Watchdog support for the eCos synthetic target I/O auxiliary
|
| 8 |
|
|
#
|
| 9 |
|
|
# ============================================================================
|
| 10 |
|
|
# ####COPYRIGHTBEGIN####
|
| 11 |
|
|
#
|
| 12 |
|
|
# ----------------------------------------------------------------------------
|
| 13 |
|
|
# Copyright (C) 2002 Bart Veer
|
| 14 |
|
|
#
|
| 15 |
|
|
# This file is part of the eCos host tools.
|
| 16 |
|
|
#
|
| 17 |
|
|
# This program is free software; you can redistribute it and/or modify it
|
| 18 |
|
|
# under the terms of the GNU General Public License as published by the Free
|
| 19 |
|
|
# Software Foundation; either version 2 of the License, or (at your option)
|
| 20 |
|
|
# any later version.
|
| 21 |
|
|
#
|
| 22 |
|
|
# This program is distributed in the hope that it will be useful, but WITHOUT
|
| 23 |
|
|
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
| 24 |
|
|
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
| 25 |
|
|
# more details.
|
| 26 |
|
|
#
|
| 27 |
|
|
# You should have received a copy of the GNU General Public License along with
|
| 28 |
|
|
# this program; if not, write to the Free Software Foundation, Inc.,
|
| 29 |
|
|
# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
| 30 |
|
|
#
|
| 31 |
|
|
# ----------------------------------------------------------------------------
|
| 32 |
|
|
#
|
| 33 |
|
|
# ####COPYRIGHTEND####
|
| 34 |
|
|
# ============================================================================
|
| 35 |
|
|
# #####DESCRIPTIONBEGIN####
|
| 36 |
|
|
#
|
| 37 |
|
|
# Author(s): bartv
|
| 38 |
|
|
# Contact(s): bartv
|
| 39 |
|
|
# Date: 2002/09/04
|
| 40 |
|
|
# Version: 0.01
|
| 41 |
|
|
# Description:
|
| 42 |
|
|
# Implementation of the watchdog device. This script should only ever
|
| 43 |
|
|
# be run from inside the ecosynth auxiliary.
|
| 44 |
|
|
#
|
| 45 |
|
|
# ####DESCRIPTIONEND####
|
| 46 |
|
|
# ============================================================================
|
| 47 |
|
|
|
| 48 |
|
|
# }}}
|
| 49 |
|
|
|
| 50 |
|
|
namespace eval watchdog {
|
| 51 |
|
|
|
| 52 |
|
|
# Was initialization successful?
|
| 53 |
|
|
variable init_ok 1
|
| 54 |
|
|
|
| 55 |
|
|
# Has the alarm triggered?
|
| 56 |
|
|
variable alarm_triggered 0
|
| 57 |
|
|
|
| 58 |
|
|
# The eCos application process id. This is needed to send a SIGPWR signal
|
| 59 |
|
|
# if the watchdog triggers, and to access /proc/<pid>/stat to obtain
|
| 60 |
|
|
# timing information. Strictly speaking _ppid is not exported by
|
| 61 |
|
|
# the I/O auxiliary.
|
| 62 |
|
|
if { ! [info exists synth::_ppid] } {
|
| 63 |
|
|
synth::report_error "Watchdog initialization failed, _ppid variable required"
|
| 64 |
|
|
return ""
|
| 65 |
|
|
}
|
| 66 |
|
|
variable ecos_pid $synth::_ppid
|
| 67 |
|
|
|
| 68 |
|
|
# Resolution, i.e. how long to go between checks. Currently this is hard-wired
|
| 69 |
|
|
# to one second, or 1000 ms. This may become configurable, either on the
|
| 70 |
|
|
# target-side via CDL or on the host-side via the target definition file.
|
| 71 |
|
|
# Note that currently the watchdog device and the GUI get updated via the
|
| 72 |
|
|
# same timer. If the resolution is changed to e.g. 10 seconds then it might
|
| 73 |
|
|
# be a good idea to update the GUI more frequently, although there are
|
| 74 |
|
|
# arguments for keeping the animation in step with the real work.
|
| 75 |
|
|
variable resolution 1000
|
| 76 |
|
|
|
| 77 |
|
|
# Options from the target definition file
|
| 78 |
|
|
variable use_wallclock 0
|
| 79 |
|
|
variable window_pack "-in .main.n -side right"
|
| 80 |
|
|
variable sound_file ""
|
| 81 |
|
|
variable sound_player "play"
|
| 82 |
|
|
|
| 83 |
|
|
if { [synth::tdf_has_device "watchdog"] } {
|
| 84 |
|
|
if { [synth::tdf_has_option "watchdog" "use"] } {
|
| 85 |
|
|
set _use [synth::tdf_get_option "watchdog" "use"]
|
| 86 |
|
|
if { "wallclock_time" == $_use } {
|
| 87 |
|
|
set watchdog::use_wallclock 1
|
| 88 |
|
|
} elseif { "consumed_cpu_time" == $_use } {
|
| 89 |
|
|
set watchdog::use_wallclock 0
|
| 90 |
|
|
} else {
|
| 91 |
|
|
synth::report_error "Invalid entry in target definition file $synth::target_definition\n\
|
| 92 |
|
|
\ Device watchdog, option \"use\" should be \"wallclock_time\" or \"consumed_cpu_time\"\n"
|
| 93 |
|
|
}
|
| 94 |
|
|
unset _use
|
| 95 |
|
|
}
|
| 96 |
|
|
if { [synth::tdf_has_option "watchdog" "watchdog_pack"] } {
|
| 97 |
|
|
set watchdog::window_pack [synth::tdf_get_option "watchdog" "watchdog_pack"]
|
| 98 |
|
|
# Too complicated to validate here, instead leave it to a catch statement
|
| 99 |
|
|
# when the window actually gets packed
|
| 100 |
|
|
}
|
| 101 |
|
|
if { [synth::tdf_has_option "watchdog" "sound"] } {
|
| 102 |
|
|
set _sound_file [synth::tdf_get_option "watchdog" "sound"]
|
| 103 |
|
|
# Look for this sound file in the install tree first, then absolute or relative
|
| 104 |
|
|
if { [file exists [file join $synth::device_install_dir $_sound_file] ] } {
|
| 105 |
|
|
set _sound_file [file join $synth::device_install_dir $_sound_file]
|
| 106 |
|
|
}
|
| 107 |
|
|
if { ![file exists $_sound_file] } {
|
| 108 |
|
|
synth::report_error "Invalid entry in target definition file $synth::target_definition\n\
|
| 109 |
|
|
\ Device watchdog, option \"sound\", failed to find $_sound_file\n"
|
| 110 |
|
|
} elseif { ! [file readable $_sound_file] } {
|
| 111 |
|
|
synth::report_error "Invalid entry in target definition file $synth::target_definition\n\
|
| 112 |
|
|
\ Device watchdog, option \"sound\", no read access to file $_sound_file\n"
|
| 113 |
|
|
} else {
|
| 114 |
|
|
set watchdog::sound_file $_sound_file
|
| 115 |
|
|
}
|
| 116 |
|
|
unset _sound_file
|
| 117 |
|
|
}
|
| 118 |
|
|
if { [synth::tdf_has_option "watchdog" "sound_player"] } {
|
| 119 |
|
|
set watchdog::sound_player [synth::tdf_get_option "watchdog" "sound_player"]
|
| 120 |
|
|
}
|
| 121 |
|
|
}
|
| 122 |
|
|
|
| 123 |
|
|
# There is no point in creating the watchdog window if any of the image files are missing
|
| 124 |
|
|
if { $synth::flag_gui } {
|
| 125 |
|
|
foreach _image [list "doghouse.gif" "alarm.gif" "eye.gif" "asleep.gif"] {
|
| 126 |
|
|
variable image_[file rootname $_image]
|
| 127 |
|
|
if { ! [synth::load_image "watchdog::image_[file rootname $_image]" [file join $synth::device_install_dir $_image]] } {
|
| 128 |
|
|
synth::report_error "Watchdog device, unable to load image $_image\n\
|
| 129 |
|
|
\ This file should have been installed in $synth::device_install_dir\n"
|
| 130 |
|
|
set watchdog::init_ok 0
|
| 131 |
|
|
}
|
| 132 |
|
|
}
|
| 133 |
|
|
}
|
| 134 |
|
|
if { $synth::flag_gui && $watchdog::init_ok } {
|
| 135 |
|
|
canvas .watchdog -width [image width $image_doghouse] -height [image height $image_doghouse] \
|
| 136 |
|
|
-borderwidth 0
|
| 137 |
|
|
variable background [.watchdog create image 0 0 -anchor nw -image $image_doghouse]
|
| 138 |
|
|
|
| 139 |
|
|
# Eye positions inside the doghouse. The eye is an 8x10 gif,
|
| 140 |
|
|
# mostly white but transparent around the corners
|
| 141 |
|
|
variable left_eye_x 48
|
| 142 |
|
|
variable left_eye_y 70
|
| 143 |
|
|
variable right_eye_x 58
|
| 144 |
|
|
variable right_eye_y 70
|
| 145 |
|
|
|
| 146 |
|
|
# Pupil positions relative to the eye. The pupils are 3x3 rectangles.
|
| 147 |
|
|
# The dog can look in one of nine different directions, with both eyes
|
| 148 |
|
|
# looking in the same direction (if visible)
|
| 149 |
|
|
variable pupil_positions { { 1 6 } { 1 5 } { 1 3 } { 3 1 } { 3 4 } { 3 6 } { 4 3 } { 4 5 } { 4 6 } }
|
| 150 |
|
|
|
| 151 |
|
|
# Which eyes are currently visible: none, left, right or both
|
| 152 |
|
|
variable eyes "none"
|
| 153 |
|
|
# What is the current pupil position?
|
| 154 |
|
|
variable pupils 4
|
| 155 |
|
|
|
| 156 |
|
|
variable left_eye [.watchdog create image $left_eye_x $left_eye_y -anchor nw -image $image_eye]
|
| 157 |
|
|
variable right_eye [.watchdog create image $right_eye_x $right_eye_y -anchor nw -image $image_eye]
|
| 158 |
|
|
|
| 159 |
|
|
variable left_pupil \
|
| 160 |
|
|
[.watchdog create rectangle \
|
| 161 |
|
|
[expr $left_eye_x + [lindex [lindex $pupil_positions $pupils] 0]] \
|
| 162 |
|
|
[expr $left_eye_y + [lindex [lindex $pupil_positions $pupils] 1]] \
|
| 163 |
|
|
[expr $left_eye_x + [lindex [lindex $pupil_positions $pupils] 0] + 2] \
|
| 164 |
|
|
[expr $left_eye_y + [lindex [lindex $pupil_positions $pupils] 1] + 2] \
|
| 165 |
|
|
-fill black]
|
| 166 |
|
|
variable right_pupil \
|
| 167 |
|
|
[.watchdog create rectangle \
|
| 168 |
|
|
[expr $right_eye_x + [lindex [lindex $pupil_positions $pupils] 0]] \
|
| 169 |
|
|
[expr $right_eye_y + [lindex [lindex $pupil_positions $pupils] 1]] \
|
| 170 |
|
|
[expr $right_eye_x + [lindex [lindex $pupil_positions $pupils] 0] + 2] \
|
| 171 |
|
|
[expr $right_eye_y + [lindex [lindex $pupil_positions $pupils] 1] + 2] \
|
| 172 |
|
|
-fill black]
|
| 173 |
|
|
|
| 174 |
|
|
|
| 175 |
|
|
# The dog is asleep until the eCos application activates the watchdog device
|
| 176 |
|
|
.watchdog lower $left_eye $background
|
| 177 |
|
|
.watchdog lower $right_eye $background
|
| 178 |
|
|
.watchdog lower $left_pupil $background
|
| 179 |
|
|
.watchdog lower $right_pupil $background
|
| 180 |
|
|
|
| 181 |
|
|
# Prepare for an alarm, but obviously the alarm picture should be hidden for now.
|
| 182 |
|
|
variable alarm [.watchdog create image 30 56 -anchor nw -image $image_alarm]
|
| 183 |
|
|
.watchdog lower $alarm $background
|
| 184 |
|
|
|
| 185 |
|
|
# Start asleep
|
| 186 |
|
|
variable asleep [.watchdog create image 48 70 -anchor nw -image $image_asleep]
|
| 187 |
|
|
|
| 188 |
|
|
# Now try to pack the watchdog window using the option provided by the
|
| 189 |
|
|
# user. If that fails, report the error and pack in a default window.
|
| 190 |
|
|
if { [catch { eval pack .watchdog $watchdog::window_pack } message] } {
|
| 191 |
|
|
synth::report_error "Watchdog device, failed to pack window in $watchdog::window_pack\n $message"
|
| 192 |
|
|
pack .watchdog -in .main.n -side right
|
| 193 |
|
|
}
|
| 194 |
|
|
|
| 195 |
|
|
# Updating the display. This happens once a second.
|
| 196 |
|
|
# If neither eye is visible, choose randomly between
|
| 197 |
|
|
# left-only, right-only or both. Otherwise there is
|
| 198 |
|
|
# a one in eight chance of blinking, probably switching
|
| 199 |
|
|
# to one of the other eye modes
|
| 200 |
|
|
#
|
| 201 |
|
|
# Also, the visible pupil(s) will move every second, to one
|
| 202 |
|
|
# of nine positions
|
| 203 |
|
|
proc gui_update { } {
|
| 204 |
|
|
|
| 205 |
|
|
if { "none" == $watchdog::eyes} {
|
| 206 |
|
|
set rand [expr int(3 * rand())]
|
| 207 |
|
|
if { 0 == $rand } {
|
| 208 |
|
|
set watchdog::eyes "left"
|
| 209 |
|
|
.watchdog raise $watchdog::left_eye $watchdog::background
|
| 210 |
|
|
.watchdog raise $watchdog::left_pupil $watchdog::left_eye
|
| 211 |
|
|
} elseif { 1 == $rand } {
|
| 212 |
|
|
set watchdog::eyes "right"
|
| 213 |
|
|
.watchdog raise $watchdog::right_eye $watchdog::background
|
| 214 |
|
|
.watchdog raise $watchdog::right_pupil $watchdog::right_eye
|
| 215 |
|
|
} else {
|
| 216 |
|
|
set watchdog::eyes "both"
|
| 217 |
|
|
.watchdog raise $watchdog::left_eye $watchdog::background
|
| 218 |
|
|
.watchdog raise $watchdog::left_pupil $watchdog::left_eye
|
| 219 |
|
|
.watchdog raise $watchdog::right_eye $watchdog::background
|
| 220 |
|
|
.watchdog raise $watchdog::right_pupil $watchdog::right_eye
|
| 221 |
|
|
}
|
| 222 |
|
|
} else {
|
| 223 |
|
|
if { 0 == [expr int(8 * rand())] } {
|
| 224 |
|
|
set watchdog::eyes "none"
|
| 225 |
|
|
.watchdog lower $watchdog::left_eye $watchdog::background
|
| 226 |
|
|
.watchdog lower $watchdog::right_eye $watchdog::background
|
| 227 |
|
|
.watchdog lower $watchdog::left_pupil $watchdog::background
|
| 228 |
|
|
.watchdog lower $watchdog::right_pupil $watchdog::background
|
| 229 |
|
|
|
| 230 |
|
|
# There is no point in moving the pupils if both eyes are shut
|
| 231 |
|
|
return
|
| 232 |
|
|
}
|
| 233 |
|
|
}
|
| 234 |
|
|
|
| 235 |
|
|
set watchdog::pupils [expr int(9 * rand())]
|
| 236 |
|
|
set new_pupil_x [lindex [lindex $watchdog::pupil_positions $watchdog::pupils] 0]
|
| 237 |
|
|
set new_pupil_y [lindex [lindex $watchdog::pupil_positions $watchdog::pupils] 1]
|
| 238 |
|
|
|
| 239 |
|
|
if { ("left" == $watchdog::eyes) || ("both" == $watchdog::eyes) } {
|
| 240 |
|
|
.watchdog coords $watchdog::left_pupil \
|
| 241 |
|
|
[expr $watchdog::left_eye_x + $new_pupil_x] \
|
| 242 |
|
|
[expr $watchdog::left_eye_y + $new_pupil_y] \
|
| 243 |
|
|
[expr $watchdog::left_eye_x + $new_pupil_x + 2] \
|
| 244 |
|
|
[expr $watchdog::left_eye_y + $new_pupil_y + 2]
|
| 245 |
|
|
}
|
| 246 |
|
|
if { ("right" == $watchdog::eyes) || ("both" == $watchdog::eyes) } {
|
| 247 |
|
|
.watchdog coords $watchdog::right_pupil \
|
| 248 |
|
|
[expr $watchdog::right_eye_x + $new_pupil_x] \
|
| 249 |
|
|
[expr $watchdog::right_eye_y + $new_pupil_y] \
|
| 250 |
|
|
[expr $watchdog::right_eye_x + $new_pupil_x + 2] \
|
| 251 |
|
|
[expr $watchdog::right_eye_y + $new_pupil_y + 2]
|
| 252 |
|
|
}
|
| 253 |
|
|
}
|
| 254 |
|
|
|
| 255 |
|
|
# Cancel the gui display when the eCos application has exited.
|
| 256 |
|
|
# The watchdog is allowed to go back to sleep. If the application
|
| 257 |
|
|
# exited because of the watchdog then of course the alarm picture
|
| 258 |
|
|
# should remain visible, otherwise it would be just a flash.
|
| 259 |
|
|
proc gui_cancel { } {
|
| 260 |
|
|
.watchdog lower $watchdog::left_eye $watchdog::background
|
| 261 |
|
|
.watchdog lower $watchdog::right_eye $watchdog::background
|
| 262 |
|
|
.watchdog lower $watchdog::left_pupil $watchdog::background
|
| 263 |
|
|
.watchdog lower $watchdog::right_pupil $watchdog::background
|
| 264 |
|
|
if { ! $watchdog::alarm_triggered } {
|
| 265 |
|
|
.watchdog raise $watchdog::asleep $watchdog::background
|
| 266 |
|
|
}
|
| 267 |
|
|
}
|
| 268 |
|
|
|
| 269 |
|
|
# Raise the alarm. This involves hiding the eyes and raising
|
| 270 |
|
|
# the alarm picture. If sound is enabled, the sound player
|
| 271 |
|
|
# should be invoked
|
| 272 |
|
|
proc gui_alarm { } {
|
| 273 |
|
|
.watchdog lower $watchdog::asleep $watchdog::background
|
| 274 |
|
|
.watchdog lower $watchdog::left_eye $watchdog::background
|
| 275 |
|
|
.watchdog lower $watchdog::right_eye $watchdog::background
|
| 276 |
|
|
.watchdog lower $watchdog::left_pupil $watchdog::background
|
| 277 |
|
|
.watchdog lower $watchdog::right_pupil $watchdog::background
|
| 278 |
|
|
.watchdog raise $watchdog::alarm $watchdog::background
|
| 279 |
|
|
|
| 280 |
|
|
if { "" != $watchdog::sound_file } {
|
| 281 |
|
|
# Catch errors on the actual exec, e.g. if the sound player is
|
| 282 |
|
|
# invalid, but play the sound in the background. If there are
|
| 283 |
|
|
# problems actually playing the sound then the user should
|
| 284 |
|
|
# still see a message on stderr. Blocking the entire auxiliary
|
| 285 |
|
|
# for a few seconds is not acceptable.
|
| 286 |
|
|
if { [catch { eval exec -- $watchdog::sound_player $watchdog::sound_file & } message] } {
|
| 287 |
|
|
synth::report_warning "Watchdog device, failed to play alarm sound file\n $message\n"
|
| 288 |
|
|
}
|
| 289 |
|
|
}
|
| 290 |
|
|
}
|
| 291 |
|
|
|
| 292 |
|
|
set _watchdog_help [file join $synth::device_src_dir "doc" "devs-watchdog-synth.html"]
|
| 293 |
|
|
if { ![file readable $_watchdog_help] } {
|
| 294 |
|
|
synth::report_warning "Failed to locate synthetic watchdog documentation $_watchdog_help\n\
|
| 295 |
|
|
\ Help->Watchdog target menu option disabled.\n"
|
| 296 |
|
|
set _watchdog_help ""
|
| 297 |
|
|
}
|
| 298 |
|
|
if { "" == $_watchdog_help } {
|
| 299 |
|
|
.menubar.help add command -label "Watchdog" -state disabled
|
| 300 |
|
|
} else {
|
| 301 |
|
|
.menubar.help add command -label "Watchdog" -command [list synth::handle_help "file://$_watchdog_help"]
|
| 302 |
|
|
}
|
| 303 |
|
|
}
|
| 304 |
|
|
|
| 305 |
|
|
# Now for the real work. By default the watchdog is asleep. The eCos
|
| 306 |
|
|
# application can activate it with a start message, which results
|
| 307 |
|
|
# in an "after" timer. That runs once a second to check whether or not
|
| 308 |
|
|
# the watchdog should trigger, and also updates the GUI.
|
| 309 |
|
|
#
|
| 310 |
|
|
# The target-side code should perform a watchdog reset at least once
|
| 311 |
|
|
# a second, which involves another message to this script and the
|
| 312 |
|
|
# setting of the reset_received flag.
|
| 313 |
|
|
#
|
| 314 |
|
|
# The update handler gets information about the eCos application using
|
| 315 |
|
|
# /proc/<pid>/stat (see man 5 proc). The "state" field is important:
|
| 316 |
|
|
# a state of T indicates that the application is stopped, probably
|
| 317 |
|
|
# inside gdb, so cannot reset the watchdog. The other important field
|
| 318 |
|
|
# is utime, the total number of jiffies (0.01 seconds) executed in
|
| 319 |
|
|
# user space. The code maintains an open file handle to the /proc file.
|
| 320 |
|
|
|
| 321 |
|
|
variable reset_received 0
|
| 322 |
|
|
variable after_id ""
|
| 323 |
|
|
variable proc_stat ""
|
| 324 |
|
|
variable last_jiffies 0
|
| 325 |
|
|
|
| 326 |
|
|
set _filename "/proc/[set watchdog::ecos_pid]/stat"
|
| 327 |
|
|
if { [catch { open $_filename "r" } proc_stat ] } {
|
| 328 |
|
|
synth::report_error "Watchdog device, failed to open $_filename\n $proc_stat\n"
|
| 329 |
|
|
set watchdog::init_ok 0
|
| 330 |
|
|
}
|
| 331 |
|
|
unset _filename
|
| 332 |
|
|
|
| 333 |
|
|
proc update { } {
|
| 334 |
|
|
set watchdog::after_id [after $watchdog::resolution watchdog::update]
|
| 335 |
|
|
if { $synth::flag_gui } {
|
| 336 |
|
|
watchdog::gui_update
|
| 337 |
|
|
}
|
| 338 |
|
|
seek $watchdog::proc_stat 0 "start"
|
| 339 |
|
|
set line [gets $watchdog::proc_stat]
|
| 340 |
|
|
scan $line "%*d %*s %s %*d %*d %*d %*d %*d %*lu %*lu %*lu %*lu %*lu %lu" state jiffies
|
| 341 |
|
|
|
| 342 |
|
|
# In theory it is possible to examine the state field (the third argument).
|
| 343 |
|
|
# If set to T then that indicates the eCos application is traced or
|
| 344 |
|
|
# stopped, probably inside gdb, and it would make sense to act as if
|
| 345 |
|
|
# the application had sent a reset. Unfortunately the state also appears
|
| 346 |
|
|
# to be set to T if the application is blocked in a system call while
|
| 347 |
|
|
# being debugged - including the idle select(), making the test useless.
|
| 348 |
|
|
# FIXME: figure out how to distinguish between being blocked inside gdb
|
| 349 |
|
|
# and being in a system call.
|
| 350 |
|
|
#if { "T" == $state } {
|
| 351 |
|
|
# set watchdog::reset_received 1
|
| 352 |
|
|
# return
|
| 353 |
|
|
#}
|
| 354 |
|
|
|
| 355 |
|
|
# If there has been a recent reset the eCos application can continue to run for a bit longer.
|
| 356 |
|
|
if { $watchdog::reset_received } {
|
| 357 |
|
|
set watchdog::last_jiffies $jiffies
|
| 358 |
|
|
set watchdog::reset_received 0
|
| 359 |
|
|
return
|
| 360 |
|
|
}
|
| 361 |
|
|
|
| 362 |
|
|
# We have not received a reset. If the watchdog is using wallclock time then
|
| 363 |
|
|
# that is serious. If the watchdog is using elapsed cpu time then the eCos
|
| 364 |
|
|
# application may not actually have consumed a whole second of cpu time yet.
|
| 365 |
|
|
if { $watchdog::use_wallclock || (($jiffies - $watchdog::last_jiffies) > ($watchdog::resolution / 10)) } {
|
| 366 |
|
|
set watchdog::alarm_triggered 1
|
| 367 |
|
|
# Report the situation via the main text window
|
| 368 |
|
|
synth::report "Watchdog device: the eCos application has not sent a recent reset\n Raising SIGPWR signal.\n"
|
| 369 |
|
|
# Then kill off the eCos application
|
| 370 |
|
|
exec kill -PWR $watchdog::ecos_pid
|
| 371 |
|
|
# There is no point in another run of the timer
|
| 372 |
|
|
after cancel $watchdog::after_id
|
| 373 |
|
|
# And if the GUI is running, raise the alarm visually
|
| 374 |
|
|
if { $synth::flag_gui } {
|
| 375 |
|
|
watchdog::gui_alarm
|
| 376 |
|
|
}
|
| 377 |
|
|
}
|
| 378 |
|
|
}
|
| 379 |
|
|
|
| 380 |
|
|
# When the eCos application has exited, cancel the timer and
|
| 381 |
|
|
# clean-up the GUI. Also get rid of the open file since the
|
| 382 |
|
|
# /proc/<pid>/stat file is no longer meaningful
|
| 383 |
|
|
proc exit_hook { arg_list } {
|
| 384 |
|
|
if { "" != $watchdog::after_id } {
|
| 385 |
|
|
after cancel $watchdog::after_id
|
| 386 |
|
|
}
|
| 387 |
|
|
if { $synth::flag_gui } {
|
| 388 |
|
|
watchdog::gui_cancel
|
| 389 |
|
|
}
|
| 390 |
|
|
close $watchdog::proc_stat
|
| 391 |
|
|
}
|
| 392 |
|
|
synth::hook_add "ecos_exit" watchdog::exit_hook
|
| 393 |
|
|
|
| 394 |
|
|
proc handle_request { id reqcode arg1 arg2 reqdata reqlen reply_len } {
|
| 395 |
|
|
if { 0x01 == $reqcode } {
|
| 396 |
|
|
# A "start" request. If the watchdog has already started,
|
| 397 |
|
|
# this request is a no-op. Otherwise a timer is enabled.
|
| 398 |
|
|
# This is made to run almost immediately, so that the
|
| 399 |
|
|
# GUI gets a quick update. Setting the reset_received flag
|
| 400 |
|
|
# ensures that the watchdog will not trigger immediately
|
| 401 |
|
|
set watchdog::reset_received 1
|
| 402 |
|
|
if { "" == $watchdog::after_id } {
|
| 403 |
|
|
set watchdog::after_id [after 1 watchdog::update]
|
| 404 |
|
|
}
|
| 405 |
|
|
if { $synth::flag_gui } {
|
| 406 |
|
|
.watchdog lower $watchdog::asleep $watchdog::background
|
| 407 |
|
|
}
|
| 408 |
|
|
} elseif { 0x02 == $reqcode } {
|
| 409 |
|
|
# A "reset" request. Just set a flag, the update handler
|
| 410 |
|
|
# will detect this next time it runs.
|
| 411 |
|
|
set watchdog::reset_received 1
|
| 412 |
|
|
}
|
| 413 |
|
|
}
|
| 414 |
|
|
|
| 415 |
|
|
proc instantiate { id name data } {
|
| 416 |
|
|
return watchdog::handle_request
|
| 417 |
|
|
}
|
| 418 |
|
|
}
|
| 419 |
|
|
|
| 420 |
|
|
if { $watchdog::init_ok } {
|
| 421 |
|
|
return watchdog::instantiate
|
| 422 |
|
|
} else {
|
| 423 |
|
|
synth::report "Watchdog cannot be instantiated, initialization failed.\n"
|
| 424 |
|
|
return ""
|
| 425 |
|
|
}
|
