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Download "GERADOR DE SINAL TIPO ESCADA | Assembly para PIC #065"

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Previous video: CRONÔMETRO COM PIC18 | Curso de PIC #103Next video: ENTRADAS DIGITAIS | Curso de PIC #004
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00:00:00
Hey guys, beauty here is Wagner hambo
00:00:02
from WR kits Channel and this is another
00:00:04
video from our assembly course for
00:00:06
microcontrollers pic in the last class
00:00:09
we learned how to generate a voltage at the output
00:00:11
ra2 an analog voltage with piic 628 to
00:00:14
16f 628 today we will implement a
00:00:17
ladder-type signal generator useful in
00:00:20
various laboratory tests, very
00:00:23
interesting, you will see that code in
00:00:25
simple assemble and you can change
00:00:26
several parameters and compose an
00:00:30
arbitrary function generator, gradually assembling it with
00:00:32
different types of signals, safe
00:00:37
[Music]
00:00:44
then and there this video is offered by
00:00:47
Felipe flop go to filipeflop.com and
00:00:49
check out all the products there is an
00:00:51
Arduino line embedded piqu sensors motors
00:00:54
robotics display prototyping
00:00:56
Wireless sources measurement modules and books here
00:00:59
on the pique line You already know the pick kit
00:01:01
3 the pique recorder you find here
00:01:03
filipeflop.com link in the description
00:01:06
I present to you a possible
00:01:08
ladder generator hardware we will use the
00:01:10
ra2 as output a
00:01:12
support capacitor here from the fard and you
00:01:15
can apply it in different amplifier circuits
00:01:17
to reinforce the
00:01:20
current and power gain of the signal in
00:01:22
practice, I'm going to test it just with the capacitor
00:01:24
itself to show you the signal
00:01:26
being generated, but here's an example
00:01:28
of an amplifier,
00:01:30
our 741. There's just one little detail missing
00:01:34
here, connecting pin 4 here to gnd, otherwise it
00:01:38
won't work, so the 741 has at its
00:01:41
input an amplitude adjustment, a
00:01:43
100k logarithmic potentiometer, a
00:01:46
network of two resistors with 15 kohm and then
00:01:51
a gain equal to that of an offset adjustment,
00:01:54
here varying the reference, turn it on at 12 v
00:01:58
and you have at the output the adjustment of your signal.
00:02:00
type of
00:02:01
ladder giving a play you see the
00:02:04
oscilloscope here and we will observe
00:02:08
our voltage ladder being
00:02:12
generated improve here the
00:02:16
zoom
00:02:18
on channel one we can see the ladder
00:02:21
being generated So there are 16
00:02:24
voltage levels very interesting see that it is
00:02:27
working if you have to be here at the
00:02:30
output I will leave it as an exercise for
00:02:32
you to vary the amplitude and vary the offset
00:02:35
to check what happens Okay,
00:02:38
so the hardware is this, it is simple for
00:02:40
you to develop and the software is very
00:02:44
simple, as well as everything commented, the
00:02:46
files are for download here in the
00:02:48
description click on show more
00:02:50
remembering to leave this video running
00:02:52
until the end huh Let's increase the
00:02:54
channel's audience retention So leave it running
00:02:56
until the end if you don't watch it all
00:02:58
at least mute it it keeps it running
00:03:00
until the last second This will help us
00:03:02
to Damn, you're a fan here of the
00:03:04
channel, I know it will help us, so
00:03:08
initializing the registers
00:03:10
again cmcon = 7 to turn off the
00:03:14
comparators, I put everything in TR state in
00:03:18
tra, ra2 must be configured as
00:03:20
input to be at high impedance and
00:03:22
generate this
00:03:24
voltage initialize the VR with E7 but the
00:03:27
initialization here doesn't matter much
00:03:29
as it is in the infinite loop. Note
00:03:32
that you have to leave
00:03:34
memory bank one selected to change the
00:03:36
contents of the
00:03:38
vrc register if you happen to select bank
00:03:42
zero and don't go back for bank one if
00:03:45
you try to update the vrc here in the
00:03:48
infinite loop it won't
00:03:50
work So have you already seen what
00:03:52
is happening in the infinite loop if
00:03:54
you are following the course and
00:03:57
studying see that I am Starting at f the
00:04:01
least
00:04:03
significant nibel I wait for half a
00:04:06
second I put the e I wait for half a
00:04:09
second, I put the d and it goes like this until
00:04:12
zero, it reached zero, back to F Well, it's
00:04:16
go to loop And there is our very
00:04:20
simple and very interesting ladder, I start with
00:04:22
the highest voltage level and
00:04:25
lower it every half second and That's why
00:04:27
we have this staircase effect
00:04:30
changing as you saw now, so to
00:04:33
change the frequency you change the time by
00:04:37
designing a different delay routine,
00:04:40
I used half a second to
00:04:42
illustrate, or design a system
00:04:46
that changes the VR content with a less
00:04:49
significant D each timer overflow
00:04:51
due to interruption that you have also
00:04:54
learned here in the course. So use the
00:04:56
knowledge acquired over the
00:04:58
weeks to improve our
00:05:00
suggested projects for you, basically that's
00:05:04
it, there's not much else to say about
00:05:06
the software, as you saw, we load the
00:05:09
registers initially And then just
00:05:11
change the value of the vrc and generate our
00:05:14
discard effect, it's more interesting to see in
00:05:17
practice, right, on the bench on the oscilloscope,
00:05:19
so without wasting any more time, let's go
00:05:22
there, come with
00:05:28
me
00:05:32
circuit mounted on the bench paradoxus
00:05:34
pepto the capacitor here and we have ra2
00:05:38
generating our reference voltage
00:05:40
our ladder type signal generator
00:05:42
remember to turn off the LEDs if you are going to
00:05:44
use the pepto paradox as one of the
00:05:47
LEDs is connected to ra2 So you have
00:05:49
to put this Jumper in the off position
00:05:52
we are monitoring the signal with an oscilloscope
00:05:54
let's go Now check on the
00:05:56
oscilloscope then on the screen the ladder-type signal
00:05:59
generated And there you have it guys,
00:06:02
the ladder-type signal works
00:06:04
as you can see, we have 16
00:06:07
voltage levels generated with the
00:06:12
vrc recorder working properly, so this
00:06:15
type of signal can be used with
00:06:18
tracers of curves and other
00:06:20
test instruments, a very cool signal,
00:06:22
a signal available in
00:06:25
arbitrary function generators for those who don't know,
00:06:28
so great, another project completed
00:06:31
here in our assemble course And how do
00:06:33
you change the frequency,
00:06:35
very simple You can change the routine
00:06:38
delay, we have already taught you how to design
00:06:40
delay routines here in this same course
00:06:42
or implement a system that changes the
00:06:45
value of the VR with each interruption. So
00:06:49
it's an exercise for you to play
00:06:51
with this project in assembly and
00:06:53
change these parameters of the ladder-type signal.
00:06:56
hello another little project
00:06:59
for you this was another video from
00:07:01
our assembly course for pic leave
00:07:03
that like favorite the video share
00:07:05
with the guys subscribe to the channel if you
00:07:08
are not subscribed yet below there is the
00:07:10
red subscribe button Click on it
00:07:12
bookmark the Bell to receive
00:07:13
updates this engineering
00:07:16
intentional use of science Thank you for
00:07:18
watching follow us on social media
00:07:21
too and follow us in all the
00:07:23
videos here is a video Every day always
00:07:26
Thank you for that hug and see you
00:07:36
next time [Applause]

Description:

Apoio: https://www.makerhero.com/?src=youtube Se inscreva em nossa nova plataforma de vídeos: https://www.dailymotion.com/wrkits Contribua com o projeto WR Kits: https://www.patreon.com/wrkits https://apoia.se/wrkits Loja WR Kits: https://wrkits.com.br/ Fanpage: https://www.facebook.com/unsupportedbrowser Twitter/Instagram/Snapchat: @WagnerRambo Confira como gerar um sinal tipo escada utilizando a tensão de referência do PIC16F628A programado em Assembly! Arquivos para download: Opção 1 https://github.com/wagner-rambo/arquivos/raw/master/Assembly_PIC_065_WR_files.rar Opção 2 https://mega.nz/#!SMI2BSQb!a-e-IIEnh8psBDi-TakbMxUHH7DjiGbbbfxYQvXOkSw SE INSCREVA AGORA NO CANAL: www.youtube.com/canalwrkits?sub_confirmation=1

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