00:00:04.880
okay Okay Thank you very much for coming uh my session So uh first uh please
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remember this microcontroller board So later I des I explain this one uh microcontroller board Okay Okay
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Later Okay Uh so let's start my session My topic is about MVC and data flow
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programming environment So uh first of me I'm Tanaka from Kushu
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Institute of Technology Japan I'm a faculty member Yes And I have a lecture
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about data structure algorithm image processing sensors and so on And also
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I'm researching about uh ML system so small microcontroller operating system
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realtime operating system and so on and also IoT IoT systems and uh recently I
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research about uh wireless communication low power wireless communication and also I have uh I
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belongs to some uh association and some activities I am now doing uh Ruby
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association thank you very much Ruby association and Ruby forum in Fukoka Mub forum in Fukoka and Ruby business
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council that is named uh as as well known as uh Rubiko Yes And uh also MV
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and MVC commit So uh before starting my topic uh
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recent topic is the virus communication local virus communication Uh that's
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stands for the LPWA virus communication I'm now researching uh this virus
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communication is maybe opposite side of the 5G or 6G or next generation virus
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communication very opposite side uh like uh zerog very very uh opposite side
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because the band uh the the transmitting speed is very low about
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one kilo bit per second or very low and uh but low power consumption And also
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the wide range wide area is covered about 50 15 20 kilometer by one small
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module Uh they very good good for the IoT devices Uh so I'm uh this technology
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apply to the local government virus communication Uh because usually local government is no money So they want to
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use such low cost virus communication for local government
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monitoring Uh this uh activity is applying for the disaster prevention in
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Japan You know the many many disasters uh strong rains landslide typhoon or
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something something earthquake or something many things Uh so uh local government want to uh get a sensor value
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from local area local government area field but uh no money So low cost virus
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comation is applying to this area This is my mark p experiment of this work So
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this is a W module and battery solar panel and so on and getting a sensor
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value usually uh rain strength wind meter uh
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temperature light sensor or something getting denser values and transmit to the uh local government office
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headquarter local government office then the local staff analyze the sensor value
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and next uh action uh They died This one this this explan
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explanation is now ongoing in Fukuoka and Fukushima and Miyagi
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prefecture Okay Uh so the topic uh the topic is about M Ruby and uh data flow
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uh programming environment So this is a programming environment First uh I show you the
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demonstration This one this one is a so this one is a just blinking LED two LEDs
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red and green LEDs are blinking that's all uh that is interesting or not maybe
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not interesting but uh I talk about this uh mechanism of this uh device and the
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mechanism of the MB and data flow programming okay demo is okay so that's
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blinking I then uh I talk about uh these topics Uh first what is MVC mv or MVC
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this is a like Ruby language Yes And data flow programming What is data flow
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programming uh next topic And uh finally I uh talk about integrating
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MLBC execution environment and data flow programming Okay First uh first
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is MVC So Mub MC is designated for the small
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devices Uh Ruby language as you know languages are using in web application
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web server or some computing server or some some places that they has many many
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memories many processing powers that is a very uh rich environment uh but uh my
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focusing point is uh that is small devices IoT devices that area that is
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usually the memory processing server power power is processing power is
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limited So uh we we m and mcg developer
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uh uh how to adapt such a ruby language into small devices Then uh we uh
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implement MB and MBC So MBC is a more smaller Ruby like
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smaller V concept of MB uh is the uh so reduce the memory consumption memory uh
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footprint in execution time That is a point uh the laptop developing
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environment is a laptop or PC that is a very rich environment So no need to uh
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such restriction no need to carrying about such memories and process powers
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but in execution environment that are small devices So we must reduce the
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memory and uh reduce the process power that is a concept in execution time only
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execution time Okay And uh source code is developing in PC that is okay
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Execution time is a compiled code Compiled code is the uh compiled in
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development environment PC and generated by code should be transmitted to the
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microcontroller Then uh the microcontroller is executed by this ber
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machine MB batch machine and also MB has many many uh
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libraries Uh MRB gem MRB M Ruby gem MB
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gem uh C Ruby gem very similar but design are very different Uh MB gem we
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have many many MB gem MRB gem libraries
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Okay here is the compression with Ruby M Ruby M Rubyc Here Ruby is
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a usually requires one megabyte or more memories maybe maybe and MV is more
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smaller about 120 kilobyte that you needed kilo kilobyte and MVC is a more smaller uh
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one uh 20 kilobyte or uh around that very smaller memory uh consumption The
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targeting devices rubies of course that the server or PC laptop anything Uh MLB
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is one board computer like a Raspberry Pi one board microcontroller and MVC is targeting to
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targeting targeting MBC is one chip microcontroller one chip So memory and
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processing unit and some other uh IOS are uh integrated in one circuit That is
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a one chip microcontroller very small microcontroller So uh targeting is a
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small devices uh low power low cost Low power is low cost and low power is low
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memory uh sorry small memory consumption is long time uh operation Uh because the
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uh you know the uh the CPU CPU and memory the
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combination is the base of the uh processing computer microcontroller processing uh CPU is uh we can cut the
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CPU power that that uh low power consumption or deep sleep mode or
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something then CPU can uh stop we can stop the CPU uh processing
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that is a very low power consumption that is okay but a problem is memory
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memory is uh always always consume the powers uh electricity powers uh so
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memory is S RAM or D RAM both memory is they are consuming always consuming
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powers So small memory is good for the small devices and small uh IoT devices
00:09:59.279
So memory memory space equals to memory consumption in small
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microcontroller Okay So uh MVC provides win features uh memory management uh in
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this microcontroller we don't have operating system so uh bameal
00:10:19.839
implementation so memory management is inside MBC machine and also power
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management of course power management uh cut the CPU power the PC CPU power and so on
00:10:34.519
controlling and also the uh realtime processing uh semi-real time processing
00:10:40.800
uh real time processing is required in this device is sometimes used for MVC is
00:10:47.120
sometimes using for the uh so controlling uh so machinery controlling
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in such area the uh realtime processing is necessary so semi-realtime processing
00:11:00.480
is uh a available byc virtual machine so this This is a hardboard MLB
00:11:08.959
uh MC microcontroller This one is also uh this one is a very small memory You
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see the SRAMM is 64 kilobyte kiloby very small uh flash memory is
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256 kilobyte kilobyte very small and uh several iOS
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here Okay Uh this is Mubc execution diagram So first we implement
00:11:40.000
Ruby code uh so MV code Ruby code M and Ruby code is the same M Ruby code and
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compiled into by code By code is a binary code uh compiled by code but uh
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but this B code is device independent independent device independent code So
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uh this B code can transmit to the any uh microcontrollers any uh architectures
00:12:04.880
no problem and uh in the small devices transmitted m code is executed by a
00:12:11.200
virtual machine This virtual machine is uh already
00:12:16.600
implement deployed as a firmware like this Uh so hardware and
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hard is hardware absoration layer is provided from MBC and MBC machine B
00:12:32.399
machine is a processing b machine and by code So by code is executed on uh MBC MV
00:12:41.120
and MBC virtual machine Okay So uh what is hard hardware social layer so uh we
00:12:48.240
want to uh port uh many many devices into many many devices Uh this one is
00:12:53.760
the one example but another devices devices we want to port deploy to many
00:13:00.560
devices So we also provide uh hard
00:13:05.600
hardware abstraction layer some libraries hardware accessible
00:13:10.800
accessing libraries is prepared provided the battery machine
00:13:17.200
and h so many several hub is available uh so ESP32 processing hardware
00:13:25.680
absorption layer libraries or uh several libraries uh MLBC is providing So you
00:13:33.040
can choose uh which library free is applied to the your virtual machine then
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build then uh you can get uh your own virtual machine for your own
00:13:45.560
devices they available on GitHub Okay this is the MVC So uh
00:13:52.720
conclude about the MVC MVC is a Ruby language for small devices my small
00:13:59.160
microcontrollers and uh compiled on the laptop and by code generated by code
00:14:04.800
should be transmitted to the microcontroller then execute that all that is the MVC
00:14:11.560
environment Okay Next is uh data flow programming data flow So uh recently
00:14:19.360
some educ educational field like junior high school high school student want to
00:14:25.680
learn about the information uh subject uh in the high school uh junior high
00:14:31.519
school uh at at such uh schools uh sometimes visual
00:14:38.000
programming is using uh they they are popular visual programming environment uh the website
00:14:45.360
is block programming like a scratch or blocky or some some v
00:14:51.279
programming environment is we can use and right side is data flow programming
00:14:57.360
This is a node environment or some environment is available So they are
00:15:03.360
very uh useful for the education because they can understand by seeing the blocks
00:15:11.760
seeing nodes uh then then they can understand they will understand the
00:15:18.240
behavior or logics of the programs after that uh they uh code into the
00:15:25.880
coding Okay So uh first uh block programming this is named small Ruby Uh
00:15:32.240
so block programming environment for Ruby language is small Ruby Uh this is
00:15:37.600
mainly using at the educational environment schools and so on So this is
00:15:44.000
a very entry of the procedure programming procedure programming So step by step line by line that's a
00:15:50.720
procedure programming is the base of the uh recent programming language Ruby C
00:15:57.040
language Java anything anything they are procedure programming So uh like this
00:16:03.279
one uh this figure is showing about the blocks left side blocks block is this is
00:16:09.199
a repeating block and uh some uh sentence and delays or something is
00:16:17.120
here and uh directly convert it into the Ruby language here Then uh we we we uh
00:16:25.920
write a Ruby code without knowing the Ruby syntax Ruby uh grammars and so on
00:16:32.240
Uh so block is a very easy to uh understand easy to implement the uh some
00:16:39.680
programming program software Yeah like this But I I I know the uh
00:16:47.040
some some student in junior high school uh they are first uh they implement by
00:16:54.079
the block arranging block arranging the wrong program they want to write but as
00:16:59.279
soon uh they tired because many many blocks should be
00:17:04.679
dra many many places and uh so ordering change the ordering or some moving
00:17:10.480
moving or something something very uh tired They tired Then finally uh they
00:17:17.600
change to the coding just coding copy paste copy paste they easy to understand
00:17:25.039
but uh initial entry point is uh block is very good because the logic they
00:17:31.039
understand the student understand but that is very tired soon uh they uh go or
00:17:39.520
enter to the uh coding style copy paste like this So this is a is a one visual
00:17:46.240
programming environment block programming environment This is also popular and next one is a
00:17:59.200
environment data pro programming environment is a benefit fit uh to the
00:18:04.960
IoT programming because IoT is a sensing some some sensors sensing processing and
00:18:12.960
output uh storing uh the storage or actuating or something something sensing
00:18:19.919
processing uh actuate something something so that is the data flow data is created
00:18:28.440
generated process processing and pass to the uh so next node process process like
00:18:36.080
this this is the data programming is a very uh good for the such IoT programming then that's why so I I'm
00:18:43.440
researching about this uh topic this is a node environment in n environment we
00:18:50.400
have uh two items one is a node node is this uh block is a node called node and
00:18:59.200
wires wire is connected to the connected between the two nodes via connected So
00:19:06.559
some data is generated in the uh the left inject node that is the generating
00:19:13.760
creating generating the new data new data or a new packet at the first point
00:19:21.200
that is a data source then uh pass to the next node process pass to the next
00:19:28.000
node process that is a series of the node and node then that's a IoT problem
00:19:35.760
like I IoT programming like this Okay So uh how to how to implement uh
00:19:43.360
implementation okay Implementation is okay So that is arranging blocks and connecting the wire that is okay So how
00:19:49.919
to uh execute this program is the next problem Okay Uh this uh node environment
00:19:58.160
is on the browser We can execute that is okay and server side that is okay But uh
00:20:04.400
my target is small devices How to execute such program in in the uh
00:20:11.600
microcontroller is my topic my research topic So I am talking about uh talking
00:20:17.880
today about this topic Uh so how to how to uh execute this data flow design
00:20:28.200
implementation on the microcontroller The answer is very simple Answer is uh
00:20:35.280
that passing the data pass the data from the one node and second node first node
00:20:40.480
passing data data is stored in Q some Q
00:20:45.520
stored and uh NQ uh sorry the Q the Q from the Q and then analyze dispatch the
00:20:53.280
uh Q packet then next process So inject inject node that is a data source is NQ
00:21:00.880
into the queue global Q and uh the Q
00:21:06.159
from the queue and analyze uh this patch then uh process that's all so uh two
00:21:13.600
phases only two phases uh the inject that is a data source in Q to the global Q and second
00:21:22.400
is uh processing node other node other nodes are uh the queue from the global
00:21:28.480
queue and analyze dispatch execute that all so uh that repeating this uh sense
00:21:35.760
then uh this uh node or uh data flow programming environment uh data
00:21:41.679
discretion in the microcontroller that is uh realized by this uh
00:21:49.080
idea Okay So integrating integrating uh this MVC environment microcontroller and
00:21:56.080
data flow uh discretion how to integrate how to how to how to uh this answer is
00:22:02.720
very very simple this one So I already uh node to M Ruby So this uh script uh
00:22:10.720
can generate uh the uh m ruby code m code uh from the node uh data flow
00:22:19.440
discretion So input is a data flow discretion that is creating the node node node node v that is a discretion of
00:22:27.919
the node uh data flow description that is input and output is uh ruby code or
00:22:36.000
rub by bite code mv by code is generated this is node or data
00:22:43.440
description here first node this is a first node uh many many information is
00:22:50.400
uh listed But uh uh in execution time only this red line enough Other items
00:22:58.000
other properties they are placing the uh location size color or something
00:23:04.400
something that is no meaning in execution uh so uh we uh remove such
00:23:10.840
uh not necessary information entries properties and
00:23:18.679
uh so and and convert into the MV code So uh this is a demo program first
00:23:26.720
demo program This one first de program this de program is two series of the
00:23:32.640
data flow two data flows Uh first data flow is blinking green LED This one is
00:23:39.840
one second each blinking one second each this one So first node is uh creating uh
00:23:47.320
generating timing the injection data source data source data generated as the
00:23:53.600
first node and second node is this is like uh D flip-flop So you know the
00:24:01.919
flip pop is the signal is to trigger coming to the this triga node then uh
00:24:08.640
first time output one second time out of zero first third time out of the one so
00:24:14.960
one zero is a flipped this is this trigger node uh middle node that one
00:24:20.559
that is a work behavior is the same as D flip-flop and final case is LED green
00:24:29.440
LED the blinking And the second floor is uh 2.5 seconds
00:24:36.159
each The timing is 2 seconds 5 seconds to trigger and to is deep flip-flop flip
00:24:44.400
one zero flipping flipping flip flop Then finally uh blinking turn on and
00:24:50.159
turn off the red LED So this is a very interesting behavior uh because this
00:24:56.320
microcontroller is a single core of course single core and single program
00:25:01.520
only uh by the way MVC can uh MLBC is
00:25:06.880
supporting multiprogramming Okay But in this in this case only one program is executing on this micro microcontroller
00:25:15.120
But uh like asynchronous uh application like a asynchronous application two LEDs
00:25:22.400
linking so independently like independently but only one
00:25:28.520
program Okay This is a generated sh program uh like a sh program Uh so sorry
00:25:34.880
the the character is very small The point is that three point sorry three
00:25:40.080
point one point is a injection data injection that is a data source is a
00:25:45.120
generate one packet into the queue NQ NQ NQ each timing each timing 1.0 0 second
00:25:52.799
2.5 seconds and so injection and second node is uh second point is uh processing
00:26:00.559
so inq from the global queue and analyze dispatch uh which behavior sometimes
00:26:07.600
drip prop sometimes uh toga or sometimes threshold or something something Ruby
00:26:13.600
code is also okay Ruby implementation is also okay uh so some some behavior some execution in the second step and the
00:26:21.200
third One is uh so you can you see the the last line sleep
00:26:30.640
uh the sleep state uh statement is that is a sleeping as a as a Ruby has a sleep the
00:26:38.960
same as a sleep but uh but in microcontroller sleep sentence
00:26:45.000
is goes to the deep sleep model in CPU CPU goes to deep sleep mode and for a
00:26:53.120
while interval time after interval time then wake up the CPU then work again go
00:27:00.679
again So uh this one is also uh so asynchronous execution is done by this
00:27:08.400
mechanism and also uh the deep uh so power consumption low power consumption
00:27:13.600
is real by the final line three uh line So that is a h good for the IoT devices
00:27:22.080
Okay Uh I now conclude my uh topic Uh
00:27:27.840
this mark is now continuing not not uh closed not not completed now continuing
00:27:34.480
So future work and uh that's idea is the uh dispatching performance Dispatching
00:27:42.159
is a not so good performance the lower performance uh so so I want to uh adapt
00:27:48.559
or improve this processing and maybe IoT is something directed to the uh
00:27:55.279
distributing distributed systems like edge computing or central centralized
00:28:00.320
computing or some node computing or something that is very uh related to the
00:28:06.960
uh distributing system So uh this node or data flow programming is sometimes
00:28:14.080
adapt can be adapted to the such distributing distributed system So I
00:28:19.200
want to adapt uh or do something uh that idea and uh
00:28:26.080
deploying uh so in such distributed system so how to deploy each program to
00:28:31.200
the devices main devices how to deploy is another problem uh so recent program
00:28:36.960
another problem So I have no idea about that distributing system distributed uh
00:28:42.840
so bad distributing in the distributed system but maybe that is an interesting
00:28:48.799
topic of the uh my research I think so uh finally thank you very much for many
00:28:55.279
many persons related to the MLB and MBC mainly so MVC developers I'm thank you
00:29:02.320
for everything uh so Higan and Hashmission very very thank Thank you
00:29:08.240
for virtual machine implementation and uh I I talk that is a local government
00:29:14.799
research center is supporting this uh research and also QC is my my
00:29:21.360
institution Q students so student work some something sometimes student work is
00:29:27.320
related student work and also u national institute of technology mat professor
00:29:34.799
ski professor and also the student in there many many uh help is many many
00:29:41.600
supporting from the such student thank you very much and uh this references so
00:29:47.840
if you are interested in MVC please refer this GitHub site or uh I'm uh
00:29:54.640
after after I'm joined to the uh official party tonight so if any
00:29:59.760
questions or any advice to me please find me find me at the conference party
