Serout problem

[mister_e]

just my 2 cents, not on the code but... RF and breadboard are poor friends.. you really want to monitor what goes out of your receiver before using it. You may need to clean the signal before.

Once again, RF and breadboard are poor friends.

[lerameur]

I am going to pause and start on it on friday or saturday,
I will come back with a ll the details, I also want to do some more reading before going on further.
I have been told that bread board do create a capacitive effect. But if I am getting something good with the encoders, I guess should be able to get something good also without the encoders.
I just saw a similar kit here:
http://www.robotshop.ca/home/product...ity-tx-rx.html
I might try them out just for fun

ken

[skimask]

just my 2 cents, not on the code but... RF and breadboard are poor friends.. you really want to monitor what goes out of your receiver before using it. You may need to clean the signal before.

Once again, RF and breadboard are poor friends.

True, but I've made some really sloppy stuff with the Rentron RF Tx and Rx modules (sloppy as in electrically sloppy, not to mention the wiring looked like a rats nest), and it's always worked fine, albiet the range suffered because of the way it was put together. And the RF itself is constrained to the modules, it doesn't flow onto the breadboard (well, except for whatever is induced).
I'm almost positive there is something more fundamental, more basic, going on with the way he's setting things up (kinda like the familiar 'not turning off the comparators' thing).
Hopefully, we'll get it ironed out soon...
JDG

[lerameur]

ok here the code:

Include "modedefs.bas"
DEFINE OSC 20 '20Mhz Oscillator was used

ADCON0 = 0 'AD MODULE OFF & CONSUMES NO CURRENT
ADCON1=7
CMCON = 7 'COMPARATORS OFF
TRISB = %00000000 'PORTB OUTPUTS

START:
serout portb.2,n2400,[$AA]
Pause 100
GOTO START

When I change the serout to serout2 , its worst. I am not getting a lot out the output pin, I also tried pin9 for output.

I have a outpu 20Mhz crstal on port 15 and 16
MCLR with a resistor to Vdd
Vdd on 14
ground on 5
wire from 8 to input of TX module

ken

[skimask]

ok here the code:

Include "modedefs.bas"
DEFINE OSC 20 '20Mhz Oscillator was used

ADCON0 = 0 'AD MODULE OFF & CONSUMES NO CURRENT
ADCON1=7
CMCON = 7 'COMPARATORS OFF
TRISB = %00000000 'PORTB OUTPUTS

START:
serout portb.2,n2400,[$AA]
Pause 100
GOTO START

When I change the serout to serout2 , its worst. I am not getting a lot out the output pin, I also tried pin9 for output.

I have a outpu 20Mhz crstal on port 15 and 16
MCLR with a resistor to Vdd
Vdd on 14
ground on 5
wire from 8 to input of TX module

ken

I see the problem right away. Remember when I said that the receiver needs to be trained (take a bit of time and read back there somewhere)? Well, you're sending one character, waiting 100ms, then sending another, waiting another 100ms...etc.
That 100ms is WAYYYY too long. Change that pause to less than 5ms, and then look at your datastream at the receiver.

Try this-----


START:
serout portb.2, n2400, [ $aa, $aa, $aa, $aa, $aa ]
Pause 1
serout portb.2, n2400, [ $0F, $F0 ]
Pause 1
GOTO START

The 4 $AA's will take 16.6ms to transmit and probably won't match the transmitter output very well. Do not worry about that, it's ok, that's why we're training the receiver. It's completely normal.

After a few cycles, the $0F and $F0 should be clearly visible and practically match the transmitter output (because we've trained the receiver). The $0F and $F0 will take about 8.3ms to complete, then there will be a 1 ms pause, then the sequence will start over.

You should be able to see an obvious difference between the $AA's and the $0F and $F0.
This should work just fine. Let me know what happens...
JDG

[lerameur]

yes its working, Thank You !!!
I just assumed that because I dont have a receiver chip i did not need the training session .
I tried it without just to see and it works, But I will use it.

Also , I did not see any pause in your code
serout2 dataout , 84 , [ REP key \ 2 ] 'serout2
how does yours work ?
also i wandered around on google and did see anyone using a pause that long. Like here, they use 1 sec pause:http://www.imagesco.com/articles/lcd/05.html

Ken

[lerameur]

O my !
I just realize there button edit on this site
I was sure you put this pause
PauseUS 1660 '<----notice the change to pauseUS
and I could not see it anymore, then I saw the edit button,
I thought for a while I was in an episode of the twilight zone..
unless you did not edit it....

k

[skimask]

yes its working, Thank You !!!
I just assumed that because I dont have a receiver chip i did not need the training session .
I tried it without just to see and it works, But I will use it.

Also , I did not see any pause in your code
serout2 dataout , 84 , [ REP key \ 2 ] 'serout2
how does yours work ?
also i wandered around on google and did see anyone using a pause that long. Like here, they use 1 sec pause:http://www.imagesco.com/articles/lcd/05.html

Ken

The first pause is just to let the LCD startup, you only need it once. The second one is there for no reason other than to be there and provide a bit of delay so you can see what is going on.
As far as the code goes, what you see is what you get. I don't have anything hidden in there, nothing special is going on...
JDG

[lerameur]

I,,
I was looking at your receiving code, and I could not see any serial in command. What are you using instead ?

ken