LCD BARgraphs

[Ioannis]

AND a level detector output at pin 13 ....

AND it works down to audio frequencies too ...

AND NE604 an CA3089 show same functionnal blocks ( of interest here ...) inside

Alain

Well, I tested NE604 and was amazed at Audio freqs. A nearly 65dB range was obtainable on a breadborad! Incredible! So the LCD_Bargraph has now a friend for audio signals making great VU-meter. One catch is that NE604 is expensive one. Here about 10 Euros in small qts. Thanks Alain for the tip.

C/O Darrel:

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?

Ioannis

[Acetronics2]

Hi, Darrel

Yes, ... I know the big problem at "high speed" is unequal calculating times upon the place pointed at ...
but we must remember it's not a GLCD ... "some holes in the somewhere" ...

Your picture's really nice !!! ...

By the way ... I have a beautiful 122x32 GLCD here ... hmmmmmm, I might give a look to that !!!

read you soon

Alain

[skimask]

By the way ... I have a beautiful 122x32 GLCD here ... hmmmmmm, I might give a look to that !!!
Alain

I've got some 'pre-fab' code for the 122x32 types. Nothing wild, just the basic setup/configure routines, some basic 'x,y' plotting, and some text output routines. But it works great for me...

EDIT: I just started a new thread with the code described above attached. Again, nothing fancy, but I've been using the same block of code for a couple of years now...

[Darrel Taylor]

C/O Darrel:

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?

Ioannis

Possibly...

OPTION_REG = $81 ; Set TMR0 Prescaler to /2, RBPU on

The comment says RBPU on, but it's actually leaving the pull-ups turned off.
<br>

[Ioannis]

Thanks Darrel, but it really doesn't matter since there is a real resistor for Pull-up on the pcb (Picdem2+).

I have not found why is not responding...

Ioannis

[Darrel Taylor]

Ioannis,

I can't see any other problems with the program. Or, any reason why it wouldn't work with the PICDEM2+.

Which PIC are you using with the PICDEM?
<br>

[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