Need help in code

[camolas]

Hi,

Im traing to macke a code in PBP for a 18f877a (to add more things in futer) and im very new at this sow i can not macke one that works well one month traing .

I need 2 condictions to light the led (2 push buttons comands or input)
first only goto to secund if on (input=1)
secund waits intill is of (input=0)
then after 40s light the led for 3s
then off the led and goto to first condiction.


Thanks in advance and sory for my bad Inglish.

[Acetronics2]

Hi, Camolas

Welcome here ... and do not be sorry for your English.

YOU made this effort ... some don't dare.

Back to our subject, Her you won't find "already cooked" code ... except if you do a search over the forums ... for existing applications.


The habit is : YOU try to make something run ( by the way learn how the processor works , and which PicBasic commands you have to use ....) - and then , we help you.


The first thing you'll have to do is CONFIGURE your processor:

- Which will be the Inputs and Outputs ?

- How to disable Unwanted features like comparators and ADC ... that could interfere with PORTs

for that ... the '877 is not the simplest ! ... would you own an old 16F84 ??? ( not compulsory - do not buy one ... but would help you a lot ! )


And, once that done, begin to translate your " text" program into successive elementary PbP ( PicbasicPro ...) commands.

So, you'll need :

1) the 16F877a Datasheet ( from Microchip site )
2) the PicbasicPro Manual corresponding to your release ( which one ? 2.50 ? )
3) some paper sheets to note the 877 registers and data for the config.
4) a good pencil and rubber
5) a HUGE coffee cup (hot is better ...)
6) LOTs of patience

...

Welcome aboard and read you soon.

Alain

[JD123]

Alain, you forgot one...

7) A swear jar

You too can retire rich!

Camolas, in a month's time you should have some code. Post it so we can take a look at it.

[camolas]

Hi,

Thanks for the starting hellp

PicbasicPro 2.50





My code

@ DEVICE pic16F877A, WDT_ON ' Watchdog Timer
@ DEVICE pic16F877A, PWRT_ON ' Power-On Timer
@ DEVICE pic16F877A, BOD_ON ' Brown-Out Detect
@ DEVICE pic16F877A, LVP_OFF ' Low-Voltage Programming
@ DEVICE pic16F877A, CPD_OFF ' Data Memory Code Protect
@ DEVICE pic16F877A, PROTECT_OFF ' Program Code Protection
@ DEVICE pic16F877A, WRT_OFF ' Flash Memory Word Enable

TRISB.0=1
TRISB.1=1
TRISC.7=0
LED var PORTC.7

inicio:

if PORTB.0 = 0 then
GOSUB liga
else
low LED
endif
goto inicio

liga:
if PORTB.1=1 then
high LED
PAUSE 200
low LED
else
low LED
endif
goto inicio


end

[JD123]

At first glance, replace the "goto inicio" at the end of the program with "return" (it was called under a "gosub").

[camolas]

I got 2 problems 1 de led dont turn of afther the periode and 2 i need the code to do like a cicle and stops when led off and only start again when "switch" 1 is on again.