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Robotic control via TV remote control
I just found out about this website. So, this information may be too late to use.
On the other hand, your original post was on Jan 15, 2009.
Microchip has an application note, AN657, that shows you how to decode TV remote control signals. The application note includes source code.
You make a table of the decoded codes for the buttons you want to use.
Then write simple subroutines for each task you need to do.
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Can you please post the link????
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Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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Okay, deadlines are this saturday. I got the chips communicating with a wired connection. On a 16F684 I used the pin portc.1 to communicate. I got it to send a variable (but now I just changed it to two word sized variables (movement1 for forward and reverse motors, and movement2 for turns). When I did one veriable, it worked perfectly by using this:
and this to receive:Code:TRAIN VAR BYTE movement1 var word movement2 var word PORTc.1 = 1 'turn enable pin high TRAIN=$55 SEROUT PORTc.1,T2400,[TRAIN,TRAIN,TRAIN,TRAIN,TRAIN,9,movement1,movement2] goto get_actions goto start
*movement1 and 2 have been declared in the beginning of code
the last labels are where my actions to route power to the motors will go...that will be the simpler part I suppose.Code:TRAIN VAR BYTE Start: PORTc.1 = 1 'turn communication pin high TRAIN=$55 SERIN PORTC.1,T2400,[9],movement1,movement2 gosub get_actions goto start forward: forwardleft: forwardright: backward: backwardleft: backwardright: turnleft: turnright: nomov:
Also, I want to add buttons to my remote control. It will simple momentary tact buttons but I still do not understand what will need to be hooked up to make this stuff work. Basically, I will need around 6 buttons or so...maybe all in the porta pins. That will be the basic way to do it...given each direction a button (e.g. L, R, FL, FR, Rl, RR). But now I am thinking of using the two movement word variables (movement1 & movement2) to do two things at once. So, when I press R and the forward button (almost like a dpad), it will send out those two variables to the chip in the car. But Idk how to make those two variables run at the same time. Like...if I am doing left and forward, then I want left and forward to be enabled at the same time.
*actually...wouldn't tris and port commands do this quicky?
It's late and I am tired...
anyways, here is what I have for the buttons as described above...will this section of code work work with momemtary tact switches like I said? Or do I have to use the button command? If I am missing or doing something wrong in any part of this...please, please help me out. Also, if you have any tuts or previous codes your wrote and don't mind PMing me...then please do.
*the serout command is located after startCode:get_actions: if leftbutton = 0 then turns = 1 ;turns = 1 means a left turn else turns = 0 ;no turn at all endif if rightbutton = 0 then turns = 2 ;turn = 2 means a right turn else turns = 0 ;no turn at all endif if backwards = 0 then forwardsandback = 1 else forwardsandback = 0 endif if forward = 0 then forwardsandback = 2 else forwardsandback = 0 endif goto start ;now we have all the buttons pressed at this small ;interval of time...we need to send it.
I have been working on this for a long time and have spent so much money that I decided to buy those rentron transmitter and receiver pair. I did next day shipping on it too as I need them fast.
If I were to use tho...will I have to encode anything or can I just connect the transmitter to the remote control pin and the receiver to the car?
Oh, I bought these:
1 - RXLC-315-LR High-Performance RF Receiver Module
http://www.rentron.com/remote_control/RXLC-434LR.htm
1 - TXLC-315-LR High-Performance RF Transmitter Module
http://www.rentron.com/remote_control/TXLC-XXX-LR.htm
I got the full code compiling but just a few things I am not sure about stilll...I have the chassis and also ordered some motors from...well...for now I forgot the place. But it was like 10 DC motors and stuff...
ONE MAJOR QUESTION!!!!
How do I make my car stop? I mean, using a DC motor...if u take the currect away from it, the car will still keep on rolling...how can I make it so that it locks up and stops? Is it possible by reading the adc or something and making it go postive, then negative then positive (pulse???) make it stop?
Please give me something to work on that above guys.
Regards,
n0rig
P.S. Pin diagram attached is not final...just something that I keep on erasing and stuff...then changing it again.
P.S.S. Help me because this is my first time using PicBasic
Last edited by .n0rig.; - 3rd February 2009 at 07:29.
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some funny thing that happened...I ordered some wireless transceiver RF chips from mouser.com (great place
http://www.mouser.com/Search/Product...579-MCP201-E/P
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To make a PM motor brake, short the power leads together, so the current the motor is generating works to stop the rotation. Obviously you would disconnect power firstOriginally Posted by .n0rig.
If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
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Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
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There simply is no "Happy Spam" If you do it you will disappear from this forum.
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.nOrig.,
Unfortunately, the MCP201 ICs you ordered from Mouser aren't RF tranceivers. These are
bidirectional serial interface ICs. See section 1.0 device overview in the MCP201 data
sheet: http://ww1.microchip.com/downloads/e...Doc/21730d.pdf
P.S.
Thanks for the order. I'll have a free copy of our RF code examples CD included/shipped
with your order today.
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Wow bruce Thanks. I did receive it today and I am planning on working on it later tonight (the cd was in there and those files look very helpful). I am going to attach what I have as of now for both my receiving and transmitting chip (both 16F684). I would like you guys to correct me on some stuff because I had it working the day prior to yesterday (but it was just the serin and serout without the "get_direction" label and the forward, backwards, left, right labels as well), but now it has stopped working.
Here is the code for the 16F684 that will be connected to the transmitter:
*also, how can I make a circuit with about 4 buttons using my 7mm tact switches so that I can get the values and send them out over serout?
**what is needed...I am still unclear on this, is it a 10k resistor or something. A simple diagram would be helpful (maybe with an accompanying piece of code
***keep in mind that this is my first project ever in PBP, I have pieced stuff together from other's posts and stuff I have read. I have managed to get the somewhat good amount of knowledge that I possess of assembly programming (and all the stuff that you may learn from it) to better understand my code.
Transmitter chip code (beta - malfunctioning?):
*I was playing with the data being sent out and making it my own numbers so it is just a loop between start and the serout command...so I can test the receiver pic...which isn't working for some reason
Code:'**************************************************************** '* Name : Electric car (4 motors and remote controlled) for Science Olympiad* '* Author : GiroTechs * '* Notice : Copyright (c) 2009 GiroTechs * '* : All Rights Reserved * '* Date : 1/14/2009 * '* Version : 1.0 * '* Notes : this is a single attempt to make a remote controller electric * '* : vehicle with both reverse and forward plus steering * '* : capabilities as well as a stop button. * '* major code piece that baffled me came from: '*http://www.picbasic.co.uk/forum/showthread.php?p=50584#post50584 '* THANK YOU n qwerty! '**************************************************************** ' ' power ^ ground ' RA5 RA0 ' RA4 RA1 ' RA3 RA2 ' RC5 RC0 ' RC4 RC1 ' RC3 RC2 ' Include "modedefs.bas" ' ' ——-[ Equates ]———————————————————————————- ' FLbutton var porta.0 ;left side forward FRbutton var porta.5 'right side forwad BLbutton var porta.1 ;left side backwards BRbutton var porta.4 ;right side backwards rightbutton var portc.5 ;just turn right leftbutton var porta.2 ;just turn left act1 var word act2 var word ;Create a changing pulsewidth signal from 10 usec wide to 655 ;msec wide. pulsewidth var word ;end equates ;Main start start: TRISA=%00000000 TRISC=%00000010 OPTION_REG.7=0 'Enable Pull-Up's on PORTB ANSEL = 0 'turns off analogue inputs OSCCON =$60 'sets internal osc to 4MHz TRAIN VAR BYTE movement1 VAR WORD movement2 var word direction var word turns var word PORTc.1 = 1 'turn enable pin high TRAIN=$55 movement1 = 4 movement2 = 1 direction = movement1 turns = movement2 SEROUT PORTc.1,T2400,[TRAIN,TRAIN,TRAIN,TRAIN,TRAIN,9,movement1,movement2] goto start END ; ;subroutines ; get_actions: if leftbutton = 0 then turns = 1 ;turns = 1 means a left turn else turns = 0 ;no turn at all endif if rightbutton = 0 then turns = 2 ;turn = 2 means a right turn else turns = 0 ;no turn at all endif if FLbutton = 0 then direction = 1 else direction = 0 endif if Frbutton = 0 then direction = 2 else direction = 0 endif goto start ;now we have all the buttons pressed at this small ;interval of time...we need to send it. ;***RAN out of space on this post, you will need to get this part of code ;from the next one below. ;
My Receiving pic's code:
*in the previous code, I set it up to send fixed data so I can see if the pins are being enabled or not. As it turns out, my code isnt working for some reason. 2 days ago I had it working but idk what could be wrong because I know that "movement1" and "movement2" are being received (wired connection). Any help by looking over my if then statements and all that would be apreciated
Code:'**************************************************************** '* Name : Electric car (4 motors and remote controlled) for Science Olympiad* '* Author : GiroTechs * '* Notice : Copyright (c) 2009 GiroTechs * '* : All Rights Reserved * '* Date : 1/14/2009 * '* Version : 1.0 * '* Notes : this is a single attempt to make a remote controller electric * '* : vehicle with both reverse and forward plus steering * '* : capabilities as well as a stop button. * '* major code piece that baffled me came from: '*http://www.picbasic.co.uk/forum/showthread.php?p=50584#post50584 '* THANK YOU n qwerty! '**************************************************************** ' ' power ^ ground ' RA5 RA0 ' RA4 RA1 ' RA3 RA2 ' RC5 RC0 ' RC4 RC1 ' RC3 RC2 ' Include "modedefs.bas" ' ' ——-[ Equates ]———————————————————————————- ' forwardL var porta.0 ;left side forward forwardR var porta.5 'right side forwad backwardL var porta.1 ;left side backwards backwardR var porta.4 ;right side backwards right var portc.5 ;just turn right left var porta.2 ;just turn left rec var portc.1 ;receiver pin action var byte B1 var byte movement1 VAR WORD movement2 var word direction var word turns var word ;Create a changing pulsewidth signal from 10 usec wide to 655 ;msec wide. pulsewidth var word ;end equates ;Main start TRISA=%00000000 TRISC=%00000010 OPTION_REG.7=0 'Enable Pull-Up's on PORTB ANSEL = 0 'turns off analogue inputs OSCCON =$60 'sets internal osc to 4MHz TRAIN VAR BYTE Start: PORTc.1 = 1 'turn communication pin high TRAIN=$55 SERIN PORTC.1,T2400,[9],movement1,movement2 movement1 = direction movement2 = turns goto checkdirection goto start forward: if turns = 0 then goto forwardgo if turns = 1 THEN goto forwardleft if turns = 2 then goto forwardright endif endif endif forwardgo: high forwardl high forwardr pause 500 low forwardl low forwardr goto start forwardleft: forwardright: backward: if turns = 1 then goto backwardleft if turns = 2 then goto backwardright endif endif high backwardl high backwardr pause 500 low backwardl low backwardr goto start backwardleft: backwardright: turnleft: high left low right pause 500 low right low left goto start if turns = 0 then goto start if turns = 1 THEN goto checkturns if turns = 2 then goto turnright endif endif endif goto turnright turnright: low left high right pause 500 low left low right if turns = 0 then goto start if turns = 1 THEN goto turnleft if turns = 2 then goto checkturns endif endif endif goto turnright nomov: goto start ; ;subroutines ; checkdirection: ;forward and backwards if direction = 0 then goto start if direction = 1 THEN goto forward if direction = 2 then goto backward endif endif endif checkturns: ;forward and backwards if turns = 0 then goto start start_turn: if turns = 1 THEN goto turnleft if turns = 2 then goto turnright endif endif endif goto start ;left and right turns return end ;Subroutines nap18ms: clearwdt ;let us make these nap intervals accurate by resetting the nap 0 ;the watch dog timer on the PIC itself. return nap54ms: gosub nap18ms gosub nap18ms gosub nap18ms return nap108ms: gosub nap54ms gosub nap54ms return nap216ms: gosub nap108ms gosub nap108ms return nap540ms: gosub nap108ms gosub nap108ms gosub nap108ms gosub nap108ms gosub nap108ms return nap1080ms: gosub nap540ms gosub nap540ms return nap1512ms: gosub nap1080ms gosub nap108ms gosub nap108ms return
Thanks guys for helping me out, and bruce...for some reason you taking the care to responding to this thread and knowing that it was me that ordered the other day really shows that ye top you guys are at the top of your game around here. I am wanting to talk to you about something I want to do...it involves selling chips and stuff.
Just get back to me at my email "GiroTechs [at] gmail".
Thanks for your help all!
Regards,
n0rig
P.S. If you can help me out with my code please, please do it quickly as I will need to have a working piece with a remote control (transmitter chip connected to tact switches to designate what the motors connected to the receiving chip will do).
Last edited by .n0rig.; - 4th February 2009 at 21:06.
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