Wired remote for Alpine

[HenrikOlsson]

Exactly, take the complete bitstream and fill the array with that, make sure you have the correct numbers of bits and then call SendBits. Because the actuall commads seem to be of different length the n*8 may not be true, make sure to count the actual number of bits in the packet.

Regarding the other comment....It totaly depends on the actual hardware you're using but since you indicate that you're using a transistor between the PIC and the actual unit I think you need to DRIVE that transistor base high AND low, not float it by setting TRIS - again, depends on how your hardware is done.

/Henrik.

[fratello]

Since I have no results with this code, I made this "PICKit2 IR capture tool" , from here : PIC Kit 2 IR capture tool « Spiralbrain's Blog
The signals captured with this tool are totally different !!! I build even an IR widget for analyzing the IR signal...My conclusions : my remote, JVC RM-RK252, send a different code than that presented till now in this topic......I post the picture of all my captures, using AND an IR_Widget with IR_Scope (yes, I build this one too !)
So : this is how the volume_up signal is ! The red part (in pdf) it's the part common for all commands ; the black part is proper command.
Can I use Mr.Henrik examples for writting the new code ?! I have some questions : 415, 560 and 1400 are values by itselfs ...How can I put them in code ? Using something like this : "Data 560, 1400 ( this in hex ?), 560,1400,560,415,560,415, so on, so on ...." ?
Thanks in advance for support and I apologize for my ignorance ...

[fratello]

Can be done in this way ???:

;
;          testing code for new JVC Remote
;                       march, 31

@ DEVICE PIC16F684, HS_OSC, WDT_OFF, PWRT_OFF, BOD_OFF, MCLR_OFF, PROTECT_ON
DEFINE OSC 20
include "ALLDIGITAL.pbp"
                          
PORTA= 000011
TRISA= 000011

PORTC= 000000
TRISC= 111110
                
CMCON0 = 000111              'Disable analog comparators.     
VRCON  = 000000               ' Disable Comparator Voltage Reference
ANSEL  = 000000               ' Set pin (AN2) to analog input, the rest to digital
ADCON0 = 000000               ' Set up A/D converter - Right Just., VDD REF., CH 3, ON

Pause 1000


i VAR BYTE
j VAR BYTE
pulse con 560

main:

if porta.0 = 0 then gosub VolUp

Pause 100 ' do it for 0.1 sec

goto main


VolUp :
TRISC.0 = 1
pauseus 4000
TRISC.0 = 0
pauseus 1900
TRISC.0 = 1
pauseus pulse
TRISC.0 = 0
pauseus 1400
TRISC.0 = 1
pauseus pulse
TRISC.0 = 0
pauseus 1400
TRISC.0 = 1
pauseus pulse

for i = 0 to 30
          Lookup i,[$BE,$8C,$8C,$2A,$2A,$2A,$2A,$2A,$2A,_
                    $8C,$2A,$2A,$2A,$2A,$2A,$2A,$2A,$2A,_
                    $8C,$2A,$2A,$2A,$8C,$2A,$2A,$2A,$2A,_
                    $2A,$2A,$8C,$8C] ,j 
TRISC.0 = 0 
PauseUs j*10
TRISC.0 = 1 
PauseUs pulse  
next i 
Return

In Proteus it's ok ; just the "preamble" part so far.
Any advice will be wellcome !

[fratello]

This code :

i VAR BYTE
j VAR BYTE
pulse con 560

main:

if porta.0 = 0 then  gosub volup
TRISC.0 = 1
goto main


VolUp :
Gosub Preamble
FOR I = 0 TO 17
            Lookup i,[$8C,$2A,$2A,$8C,$2A,$2A,$2A,$8C,$2A,$8C,_
                      $2A,$2A,$2A,$2A,$8C,$8C,$8C,$8C ] ,j
TRISC.0 = 0 
PauseUs j*10
TRISC.0 = 1 
PauseUs pulse  
next i
PauseUs 4500 
RETURN

Preamble :
TRISC.0 = 1
Pauseus 4000
for i = 0 to 30
          Lookup i,[$BE,$8C,$8C,$2A,$2A,$2A,$2A,$2A,$2A,_
                    $8C,$2A,$2A,$2A,$2A,$2A,$2A,$2A,$2A,_
                    $8C,$2A,$2A,$2A,$8C,$2A,$2A,$2A,$2A,$2A,$2A,_
                    $8C,$8C ] , j
TRISC.0 = 0 
PauseUs j*10
TRISC.0 = 1 
PauseUs pulse  
next i 
Return

give me, in Proteus (!), the code I need ...The next step it's hardware testing !

[fratello]

I put all the values into one command :

pulse con 567

MAIN :
if porta.0 = 0 then  
PORTC.0 = 0
pauseus 4032

for i = 0 to 48
lookup i,   [value, value, value, ....], j
PORTC.0 = 1 
PauseUs j
PORTC.0 = 0 
PauseUs pulse
next i

PORTC.0 = 0
PauseUs 4500
PORTC.0 = 1
ENDIF

PAUSE 25
goto main

...but testing hardware I have no results , despite the "full similarity" with code captured with IR_Scope !
Somebody has more experience with IR remote control ? It's the "lenght" of each pulse so critical ?
I don't understand what I do wrong ...

[fratello]

Still no good news ... Cycle " for ...next" generate a "big" delay ?

[gadelhas]

Hi fratello;

I dind't read the hole thread, but are you trying to reproduce a IV remote control??
If so, i see on your last post that your reproducing the pulses, but you are not using modulation, and you must use modulation when using IV. Probably 36Khz, or 38Khz, or 40Khz.

[HenrikOlsson]

Hi,
The actual FOR-NEXT construct will add some additional delay due to the fact that it is a jump isntruction and it has to make the comparison. Add to that the execution time of the LOOKUP instruction you're using. Why don't you just measure it and adjust the pulse constant so it matches the capture of the working remote?

/Henrik.