Stable ADC readings

[mister_e]

Never trust a sim... as simple as that. They're on the market for laziness and to make good money out of it. Good enough to replace any xBox, Nintendo... or some porn.

You tie the resistor like the guy in that previous thread. One side on the PIC the other side are tied together and sent to the Radio.

[mazoul72]

Hi Steeve,

i test intensity value with some résistors tie together to one led.

But with your program , trisb stay at 255 , i put some select case for test but no trisbx.0 work (255 always)
I will try to my test platine .
I understand your "voodoo formule" , it is for have only one button put on , no action with 2,3 .. together .

Regards.
Hervé

[mazoul72]

i repeat my question :
how tie the resistors on the side of PIC together to have a resultant resistor in parallele ?
i agree that the other side is tie together to the radio , but on the ground ,yes
but the +5V for PIC RBx ?

Regards.

Hervé

[mazoul72]

in fact , the simulator isn't reactif with adc , i must go slowly with an0/an1 choice .
But step by step around button(i) , it works.

I must add six other buttons in programm and .

[mazoul72]

Can i use btn as word variable for a select case like 1110111111111111 ?
(with your formule dcd(i).... )
i can't for the moment ...
i use adcchannel 0 to 3 .

Regards.
Hervé

[mister_e]

pbp 3 manual section 2.12

[mazoul72]

Hello,

it works all !
great and many thanks.

I made another "formule" in addition to yours (to work with 12 buttons and 4 channels__3 buttons on a wire)
It is perhaps not proper .
I add to this : PIC Simulator IDE 6.91 works great , all test with it and great.


. btn = ((DCD i) << (ADCChannel*3))^255
. if ADcchannel = 3 and btn = %11111111 then btn = (btn - (3*adcchannel)) << i
. gosub choose
..
..
ADCChannel = ADCChannel + 1 'Switch to the other ADC channel
if ADCchannel = 4 then adcchannel = 0
..
..
choose:
select case btn
' first bloc of 6 buttons
case %11111011 ' AN0-270 --- 47k and 5k = 4.6k
TRISB.0 = 0 ' 5k and 5k = 2.5k
TRISB.1 = 0
case %11111101 ' AN0-164 --- 47k and 10k = 8.2k
TRISB.1 = 0 ' 5k and 5k = 2.5k
TRISB.2 = 0 ' 47k and 47k = 22k
case %11111110 ' AN0-90 --- 47k and 22k = 15k
........


Regards
Hervé