I have made a script to Power up 2 7 segment displays (common anode)
with
Port A to control the common anode part using a 2N3906 pnp BJT.
Port B power up the cathode part of the 7 seg.
Is this script correct? Its my first time programming one, and none of the lights light up. I am having a headache now. lolz.

;*******************************;
; Pressure Sensor Program ;
; Oretega 6/4/2008 ;
;*******************************;
list p=16F877A
#include p16F877A.inc
; The start of the main program
Main:
__CONFIG _CP_OFF & _WDT_OFF & _HS_OSC & _LVP_OFF & _BODEN_OFF
org 0
PORTA equ 00h
PORTB equ FFh
END

 

I have made a script to Power up 2 7 segment displays (common anode)
with
Port A to control the common anode part using a 2N3906 pnp BJT.
Port B power up the cathode part of the 7 seg.
Is this script correct? Its my first time programming one, and none of the lights light up. I am having a headache now. lolz.

;*******************************;
; Pressure Sensor Program ;
; Oretega 6/4/2008 ;
;*******************************;
list p=16F877A
#include p16F877A.inc
; The start of the main program
Main:
__CONFIG _CP_OFF & _WDT_OFF & _HS_OSC & _LVP_OFF & _BODEN_OFF
org 0
PORTA equ 00h
PORTB equ FFh
END

First you have to set the oscillator frequency and setup your timers. Then set which I/O you want to be inputs and which to be outputs. Also you have to use a while condition like this
while (true)
{
your code
}

to have an infinite loop of operation.

Look at this website http://www1.ceit.es/asignaturas/robots/datasheets/CCS.pdf

It says the instructions to program in C language

Here is a part of the beginning of a program of mine in C:

#include <16f819.h>

#fuses NOWDT, INTRC_IO, NOPUT, NOMCLR, NOBROWNOUT, NOLVP, NOCPD, NOWRT, NODEBUG, NOPROTECT

#use fast_io(A)
#use fast_io(B)

void main()
{
setup_oscillator(OSC_8MHZ);

set_TRIS_B(0b00000000); //determine which pins are inputs and which are outputs
set_TRIS_A(0b00111111);

SETUP_TIMER_0(RTCC_DIV_128);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);

while (true)
{
your code
}

 

I have learned c++ in college 2 years ago, quite blurry in my mind now. But think it will be easier than assembly language. Can teach me how to use it with mplab?

 

I have learned c++ in college 2 years ago, quite blurry in my mind now. But think it will be easier than assembly language. Can teach me how to use it with mplab?

Read the attached pdf file.