pic16f628a interfaced with 7segment

[nxt_]

i am trying to interface pic16f628a with seven segment display common cathod. my wiring is okay (i guess).. -segment is attatched to portb with series resistors 300 ohm, the program is supposed to display the number of high pulses enter PORTA.0, from 0~9 i write it in picbasic (proton). when i start the program it just display 0 as there is no high pulses enter porta.0, although i keep connect porta.0 to 5v and no respond. and onther issue; is uptill now 3 ics are damaged. don't know the reason. the connection are okay . Vss to gnd, vdd to 4.5v, mclr to 4.5v, crystal is 4mhz in the osc1,osc2 pins and 10kpulldown resistor on porta.0 and the rest are the button and the 7segment. so any help? is there any addiotional intialization i should do before i start the program.

Many Thanks For Your Attention.

 

[cubanflyer]

Can you post your code and a schematic, for people to view and maybe help?

 

[Tahmid]

Hi,
You should upload your work so far, so that it can be checked. You could check this link for info and reference: A thread on a similar topic

Hope this helps.
Tahmid.

 

[rajudp]

post your code then only we can check it