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Philo.toit
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Philo.toit
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import log
import gpio
import pixel_strip show *
import bitmap show bytemap_zap
import monitor
// NeoPixel RGB-Led-Ring
GPIO_LED_STRIP ::= 13 // 2 //13
NUM_PIXELS ::= 24
NUM_PHILOSOPHS ::= 5
r := ByteArray NUM_PIXELS
g := ByteArray NUM_PIXELS
b := ByteArray NUM_PIXELS
ledPixels /PixelStrip := ?
PIXELS ::= List NUM_PIXELS: it
PIXELS_PHILOSOPH ::= [4, 8, 12, 16, 20]
PIXELS_LEFT_FORK ::= [6, 10, 14, 18, 22]
PIXELS_RIGHT_FORK ::= [2, 6, 10, 14, 18]
startSignal := monitor.Signal // to start all tasks synchronised
class Fork:
id /int
pixel /int
lock /monitor.Semaphore
logger_ /log.Logger
static COLOR_FREE ::= [0,0,8]
static COLOR_USED ::= [0,0,8]
constructor --.id/int --.pixel/int:
logger_ = log.default.with_name "Fork-$(id+1)"
lock = monitor.Semaphore --count=1 --limit=1
//display
//sleep --ms=500
isUsed -> bool:
return not isFree
isFree -> bool:
return lock.count > 0
take:
logger_.debug "take"
lock.down
display
give:
logger_.debug "give"
lock.up
display
display:
setPixelColor pixel (isFree? COLOR_FREE : COLOR_USED)
if pixel == PIXELS_RIGHT_FORK[0]:
setPixelColor PIXELS_LEFT_FORK[4] (isFree? COLOR_FREE : COLOR_USED)
ledPixels.output r g b
logger_.debug (isFree ? "free" : "used")
class Philosoph:
static STATE_UNKNOWN /int ::= 0
static STATE_THINKING /int ::= 1
static STATE_HUNGRY /int ::= 2
static STATE_EATING /int ::= 3
static STATE_FEDUP /int ::= 4
static COLOR_BLACK ::= [0,0,0]
static COLOR_ARMS ::= [8,8,8]
static COLOR_STATE ::= [[0,100,100], [0,255,0], [255,100,0], [255,255,0], [0,64,0]]
static STATE_MESSAGE ::= [ "absent", "thinking", "hungry", "eating", "fed up"]
id /int
leftFork /Fork
rightFork /Fork
state /int := STATE_UNKNOWN
pixel /int
logger_ /log.Logger
constructor
--.id/int
--.leftFork/Fork
--.rightFork/Fork
--.pixel/int
:
logger_ = log.default.with_name "Phil-$(id+1)"
task := task ::
display
leftFork.display
rightFork.display
logger_.debug "takes a seat"
startSignal.wait
while true:
state = STATE_THINKING
display
sleep --ms= 1000 * (random 1 15)
//---------------------------------------
state = STATE_HUNGRY
display
//sleep --ms=1000
// how to wait for the forks
strategy ::= 4
if strategy == 1:
takeRightFork
takeLeftFork
else if strategy == 2:
takeLeftFork
takeRightFork
else if strategy == 3:
if leftFork.isFree:
logger_.debug "left fork free"
takeLeftFork
takeRightFork
else if rightFork.isFree:
logger_.debug "right fork free"
takeRightFork
takeLeftFork
else:
logger_.debug "no fork free"
takeLeftFork
takeRightFork
else if strategy == 4:
while leftFork.isUsed or rightFork.isUsed:
//logger_.debug "no fork free"
sleep --ms=100
takeRightFork
takeLeftFork
//---------------------------------------
state = STATE_EATING
display
sleep --ms= 1000 * (random 5 10)
// put forks away
setPixelColor pixel - 1 COLOR_BLACK
setPixelColor pixel + 1 COLOR_BLACK
ledPixels.output r g b
leftFork.give
rightFork.give
//---------------------------------------
state = STATE_FEDUP
display
sleep --ms=1000
takeRightFork:
rightFork.take
setPixelColor pixel - 1 COLOR_ARMS
display
takeLeftFork:
leftFork.take
setPixelColor pixel + 1 COLOR_ARMS
display
display:
setPixelColor pixel COLOR_STATE[state]
ledPixels.output r g b
logger_.debug STATE_MESSAGE[state]
fork := List NUM_PHILOSOPHS
philosoph := List NUM_PHILOSOPHS
setPixelColor pixel/int color/List:
r[pixel] = color[0]
g[pixel] = color[1]
b[pixel] = color[2]
testPixels:
WAIT ::= 50
NUM_PIXELS.repeat: | pixel |
setPixelColor pixel [ 255, 0, 0]
ledPixels.output r g b
sleep --ms=WAIT
setPixelColor pixel [ 0, 255, 0]
ledPixels.output r g b
sleep --ms=WAIT
setPixelColor pixel [ 0, 0, 255]
ledPixels.output r g b
sleep --ms=WAIT
setPixelColor pixel [ 32, 32, 32]
ledPixels.output r g b
PIXELS.do --reversed: | pixel |
setPixelColor pixel [ 0, 0, 0]
ledPixels.output r g b
sleep --ms=WAIT/2
clearPixels:
NUM_PIXELS.repeat: | pixel |
setPixelColor pixel [ 0, 0, 0]
// ==============================================
main:
ledPixels = PixelStrip.uart NUM_PIXELS --pin=(gpio.Pin GPIO_LED_STRIP)
//testPixels
//createForks
NUM_PHILOSOPHS.repeat:
fork[it] = Fork --id=it --pixel=PIXELS_RIGHT_FORK[it]
//createPhilosophs
NUM_PHILOSOPHS.repeat:
philosoph[it] = Philosoph
--id=it
--leftFork=(fork[(it+1) % NUM_PHILOSOPHS])
--rightFork=fork[it]
--pixel=PIXELS_PHILOSOPH[it]
// start it
sleep --ms=1000
startSignal.raise
print "started"