Problem with a program...

[hawk72501]

I have made the following program:

INCLUDE "modedefs.bas"

TRISB=%11111111
TRISC=%00001010

W1 VAR WORD
W2 VAR WORD
loop:
Count PORTB.7,3000,W1
Count PORTB.6,3000,W2

SerOut2 PORTC.0,84,["TIMES COUNTSa:",DEC W1,13,10]
SerOut2 PORTC.0,84,["TIMES COUNTSb:",DEC W2,13,10]

GoTo loop

In pins B.7 and B.6 i have connected the 2 channels of an incremental quadrate encoder.The problem is that channel A(PortB.7) shows the right pulses but channel B(PortB.6) shows always 0 !I am sure that i have made the right connections .Do you know what goes wrong?

Thank you in advance.Don't hesitate to answer me.I am desperate!

[mister_e]

how you connect the encoder? Pull-up, PUll-down resistor are there??

[Ingvar]

Are you rotating the encoder for all six seconds? If you only rotate it while counting pulses on PortB.7, you will miss the pulses on portB.6.

[Acetronics2]

You're right, ingvar ...

as PBP can't do two things at a time ...it reads Portb.7 for 3 seconds and THEN Portb.6 for the 3 following seconds ...

No hope this way ...

Alain

[hawk72501]

Ingavr and acetronics thanks for replying!Have you any idea how to make it working to count simultaneously the 2 channels?

Mister_e thanks for replying.If i use a pull-up resistor of 2.7K is that ok?Should i turn the internal pull-ups off?

[Acetronics2]

Hi Hawk,

another thread is still open on this subject ... SEARCH function !!!

11 results ... no less !!!

Alain