Hi,
Have you measured the pins with a voltage meter?
Have you calculated the current through the LED with 10k? Is it enough?
Maarten
> I'm confident its user error, but I seem to be unable to program my
> PIC16F628A (it's my first foray into the world of PICs, been working with
> arm M4's). All I'm trying to do is turn on LED outputs, but I this doesn't
> seem to be working. I'm trying to use the internal 4MHz oscillator, all
> the
> port A and B pins (so everything except for VDD and VSS) are connected to
> a
> 10K resistor and LED. This is all done on a breadboard, so it's possible
> there is an error in the wiring, but it appears to be correct.
>
> I'm using a PicKIT 2 to program it (and it can correctly auto identify the
> device as a PIC16F628A) and believes it successfully flashes the device.
> This leads to me to believe I have a good chip, and the ICSP worked out
> correctly.
>
> I'm attempting to build with SDCC, with the appended code, but I don't get
> any thing on any of the output pins, it simply sits there after power on.
> Are there any obvious errors here?
>
> Thanks for your time.
>
>
> /////////////////////////////////////////////////////////////////////////////////////
> #include "pic16f628a.h"
>
> unsigned int __at 0x2007 __CONFIG = _INTOSC_OSC_NOCLKOUT & //
> Internal
> oscillator
> _WDT_OFF & // No Watchdog
> _LVP_OFF & // No Low-Volt
> Program.
> _DATA_CP_OFF & // No Code Protect
> _PWRTE_ON;
>
> static unsigned char count;
>
> void main(void) {
> CMCON |= 0x07; // Disable comparators. NEEDED FOR NORMAL PORTA
> TRISB = 0x00; // Set port B as all outputs
> TRISA = 0x00; // Set port A as all outputs
> PORTA = 0xFF;
> PORTB = 0xFF;
>
> while(1) {}
> }
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