Remote Control Encoder

pusink

HOW TO MAKE IR ENCODER USING SX28.

Post Edited By Moderator (Bean (Hitt Consulting)) : 6/5/2007 5:31:07 PM GMT

JonnyMac

The devil is in the details and your post is lacking.... which protocol, for example?

pusink

I WANT MAKE MY OWN REMOTE CONTROL TRANSMITER USING 8 BUTTON AND TRANSMIT WITH IR DIODE. THE RECIEVER CIRCUIT, I'M USING Sony IRCS Decoding EXAMPLE INSIDE SXB SOFTWARE. I PREFER USING SXB. TQ.

JonnyMac

The SIRCS protocol is well-documented, and there are any number of approaches; what I would probably do is use an ISR to modulate the LED and take care of base timing, with a subroutine setup for taking the bits from the value you intend to transmit and loading the appropriate timer.

EDIT: I've attached an untested program to get you started.

EDIT #2: I've updated the program to add an ISR-based frame timer so that the frame timing can be consistent, regardless of the value(s) transmitted.

Post Edited (JonnyMac) : 6/5/2007 6:43:26 PM GMT

DosManDan

Man, I learn a ton from your code Jonny....thanks!

Dan

pusink

ANYBODY CAN EXPLAIN THIS SXB CODE FOR ME.................

' Use: Tx_SIRCS irWord
' -- transmit 12-bit (device + command) SIRCS code
' -- sends three frames

SUB Tx_SIRCS
tmpW2 = __WPARAM12 ' capture code

FOR tmpB1 = 1 TO 3 ' send three frames
' start bit
IrAnode = IR_ENABLE ' activate IR LED
Delay MS_24 ' wait 2.4 ms
IrAnode = IR_DISABLE ' deactivate IR LED
Delay MS_06 ' wait 0.6 ms

' clock the bits, LSB first
tmpW3 = tmpW2 ' make copy of ir word
FOR tmpB2 = 1 TO 12 ' send 12 bits
IrAnode = IR_ENABLE ' activate IR LED
IF tmpW3.0 = 1 THEN ' if 1
Delay MS_12 ' wait 1.2 ms
ELSE ' otherwise
Delay MS_06 ' wait 0.6 ms
ENDIF
IrAnode = IR_DISABLE ' deactivate IR LED
Delay MS_06
tmpW3 = tmpW3 >> 1 ' get next bit
NEXT
Delay_MS 33 ' pad for ~45 frame time
NEXT
ENDSUB

Bean

It looks like it is pretty well documented to me ???
What part of it doesn't make sense ?

Bean.

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pusink

FOR tmpB2 = 1 TO 12 ' send 12 bits
IrAnode = IR_ENABLE ' activate IR LED
IF tmpW3.0 = 1 THEN ' if 1
Delay MS_12 ' wait 1.2 ms
ELSE ' otherwise
Delay MS_06 ' wait 0.6 ms
ENDIF
IrAnode = IR_DISABLE ' deactivate IR LED
Delay MS_06
tmpW3 = tmpW3 >> 1 ' get next bit
NEXT
Delay_MS 33 ' pad for ~45 frame time
NEXT

WHAT IS VALUE 12-BIT DATA TRANSMIT (dEVICE + COMMAND)?

JonnyMac

Okay, KEELOQ, you're going to have to do a bit more reading. The SIRCS protocol is documented all over the Internet -- go do a Google search and read up on it; that's what I did to write that demo for you. If you happen to have Parallax's "IR Remote for the Boe-Bot" it's explained in there as well, though that book deals with decoding so you'll need additional information on encoding.

What you'll want to look for, specifically, is information on Sony's 12-bit protocol; the lower seven bits are called the command code, the upper five bits are called the device code; you have to load a word with the appropriate bits before transmitting. The receiver code you cited (which I also wrote when I worked for Parallax) expects to receive 12 bits and splits them into the LSB and MSB of the return value.

Bean

Here is a link to the book Jon mentioned: http://www.parallax.com/dl/docs/prod/sic/WebIR-%20v1.1.pdf

Only Parallax would make all their books free downloads...

Bean.


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“The United States is a nation of laws -· poorly written and randomly enforced.” - Frank Zappa

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
www.hittconsulting.com
·