LCD BARgraphs

[Ioannis]

Currently the 16F877. I have handy also other to try. Maybe a 18F452.

To be sure that Portb.0 is OK, I tested with a simple loop of the kind:

while portb.0=1
wend
high LED1

and worked OK. So electrically there is no problem.

PICDEM2+ is connected to ICD2 working in programmer mode only. So, there is for sure no other source of interference.

Skimask: could you post the link you mentioned? Thanks

Ioannis

[Acetronics2]

Skimask: could you post the link you mentioned? Thanks

Ioannis

Hi, Ioannis

There : http://www.picbasic.co.uk/forum/showthread.php?t=6574

<< While trying to develop my project using your interrupts, I stuck on, I think for sure, stupid one. The attached sample code does not respond to PORTB.0 interrupt. Is there any mistake I 've made and can't see? >>

Thanks to PbP ... TRISB = 255 and led on PORTB.2 will work ...

BUT does your PORTB.0 change state when button ( ?) pushed ... in other words, is the pullup or pulldown resistor the OTHER side of the Pushbutton ... ( yes, I know it's a really stupid mistake ...but ...)


have a nice day

Alain

[Ioannis]

Thanks Alain for the link.

About the portb I did not really understood what you meant.

I test the portb.0 independently from the Interrupts and when pressed the program really see it. Like that:

while portb.0=1
wend
high led1

If button on Portb.0 is NOT pressed the program loops in the While-wend. If pressed then the LED1 lights, showing that there is no problem in the Setup or connections.

But when trying the Interrupts nothing happens. Really annoying...

Ioannis

[Acetronics2]

Hi,

For Portb.1 ...

you've declared it as an Input ... and drive a led with it ... so, it's an OUTPUT !!!

...

I think the Interrupt problem could be here ... I remember a thread explainining a Change in the I/Os disabled the Pullups ...

YESS it is !!! ... just over Fig 3.3 of the Datasheet ...

Tadaaaaaaa ..... one RTFM for you !!!

Alain

[Ioannis]

The LED is on portb.2. Portb is set as all outputs except bit 1. See the trisb=1

So, where is the ... Tadaaa?? :-)

Ioannis

[Acetronics2]

The LED is on portb.2. Portb is set as all outputs except bit 1. See the trisb=1

So, where is the ... Tadaaa?? :-)

Ioannis

No tadaaaaaa ... just read a bit too quickly ( TRISx = %00000001 is so much easier to look at ...)

Strange ... i tried DT interrupts quite the same way ... no problems.

[Ioannis]

I think I am,

trisb=1 is equal to:

trisb=%00000001

Isn't this bit 0 of port b set as input?

Ioannis