The worst programmer ever to grace this forum - ME!

[Archangel]

Can someone explain what's actually going on with the looping part though....

main:
portc = 0
pause 500
for i = 1 to 15
portC = i
pause 150
next i
goto main

It looks like it's setting port C output to be low, waiting 500 (milliseconds?), the making PRT C = i .....what's that "i" melarkey all about?!!


Still no sign of life from the LED on my PICkit 2 board though (though I'm figuring Port C needs to be set high at some stage ....by the way, why no use of PORTC.0 or PRTC.1 here...ie nominating the actual chip pin RC0, RC1 etc?)

tks,
Hank.

Last things first, The code assumes the port arrangement is from lowest order portc.0 to highest order portc.7 in its display of count. The i is just a name for the variable storing the count, you can rename it HankMcSpank and it will work the same, it is just easier to use i. So you have a variable storing a binary count to 15, the i=i<<1 is there to alter the light sequence so you do not have any dark leds in between lit ones. Try commenting it out and you will see it count in binary. Change the 15 to seven and it will only light 3 LEDs.
<br> Now as for no signs of life from your LEDs, in the PICkit2 programmer software there is a check box that must be selected to power your demo board, unless you rig a separate power line to it.
<br>__config MyConfig is a trick I picked up from Darrel so as to avoid having my config statement run off the reservation (the page). This is especially helpful if you print your code for archival purpose. You can, and most do put it all on one line like so:<br>@ __CONFIG _INTRC_OSC_NOCLKOUT & _WDT_OFF & _PWRTE_ON & _MCLRE_ON & _BOR_OFF

Edit: I initially misunderstood last question.