16f628 for all outputs

[Max_Gauss]

I have tried about everything i know to get a 16f628 to blink my led. But to no avail. Is there some special config i need to set to have this action take place? I am just applying power, using the internal osc. set my comparator mode to 7. is there something else i should be doing?

[skimask]

I have tried about everything i know to get a 16f628 to blink my led. But to no avail. Is there some special config i need to set to have this action take place? I am just applying power, using the internal osc. set my comparator mode to 7. is there something else i should be doing?

Are you using the PIC16F628 or the PIC16F628A?
There's enough of a difference between the two to keep things from working.
And post some code, a schematic, something, anything.
For all I know you've got 3 buckets of grass clippings, 2 rocks, and a jar of mustard.

[Pic_User]

Are you using the PIC16F628 or the PIC16F628A?
There's enough of a difference between the two to keep things from working.
And post some code, a schematic, something, anything.
For all I know you've got 3 buckets of grass clippings, 2 rocks, and a jar of mustard.

Hi skimask,
Here is a circuit attachment I found online you might find helpful.


hth
-Adam-

[mister_e]

<table><td><img SRC="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=1629&stc=1&d=117919107 7"></td>
<td>

• Jar of mustard = +5V
• RCK 1, RCK 2 = Gnd
• GCB1, GCB2, GCB3 = LED + 330 OHM Resistor
• PIC16F84 = something that should be removed from the market since 10 years, can happilly be replace by a 16F628. If you do it, remove the crystal + both 22pF capacitor and try the code bellow

</td></table>

<font color="#000000">        <font color="#008000">'
        '       Pic Configuration
        '       =================
                '
                '       Here we will set the PIC configuration fuses
                '       to use the internal PIC oscillator and disable the MCLR
                '       pin.
        </font>@ __CONFIG  _INTRC_OSC_NOCLKOUT &amp; _MCLRE_OFF  &amp;  _LVP_OFF &amp; _WDT_OFF &amp; _PWRTE_ON  &amp; _BODEN_ON  
                <font color="#008000">'
                '       This assume you're using MPASM to compile your code
                '       For detailed information about Configuration fuse setting, 
                '       have a look to &quot;Presetting Configuration Fuses (PIC Defines)&quot; thread
                '       in the forum FAQ section.
                '           http://www.picbasic.co.uk/forum/showthread.php?t=543

        '                      
        '       Hardware assignment
        '       ===================
        </font>GCB_1   <font color="#000080">VAR </font>PORTB.0
        GCB_2   <font color="#000080">VAR </font>PORTB.1
        GCB_3   <font color="#000080">VAR </font>PORTB.2
                        
        <font color="#008000">'
        '       Hardware configuration
        '       ======================
        </font>TRISB = 0               <font color="#008000">' Configure all PORTB i/o to output
        
        '
        '       Software/Hardware initialisation
        '       ================================
        </font>PORTB = 0
               
        <font color="#008000">'------------------------------&lt; Main program &gt;-----------------------------------
        '
</font>Start:  <font color="#008000">'
        '       Here will do the 'buckets of grass clippings' light show
        '       using a simple method... not the best
        '
        </font>GCB_1 = 1
        <font color="#000080">PAUSE </font>500
        GCB_2 = 1
        <font color="#000080">PAUSE </font>500
        GCB_3 = 1
        <font color="#000080">PAUSE </font>500
        GCB_1 = 0
        <font color="#000080">PAUSE </font>500
        GCB_2 = 0
        <font color="#000080">PAUSE </font>500
        GCB_3 = 0
        <font color="#000080">PAUSE </font>500
        <font color="#000080">GOTO </font>Start
        <font color="#008000">'
        '---------------------------------------------------------------------------------
</font>

[skimask]

Hi skimask,
Here is a circuit attachment I found online you might find helpful.

hth
-Adam-

Good answer!
Oh Man! I near fell outta my chair!

[Max_Gauss]

Thanks be to you all and my Lord Jesus..
Each one of you have help me and i do so appreciate it. My 628 is now operable, and it is so wonderful.
This was my problem.
I was initially programming the 16f84 using MPLAB Assem. with PicStart Plus with upgrade. Then i bought PBP, which is so nice, and i changed to the 16f628. then using MIcroCode Studio i wrote a very simple piece to blink my LED. BUT .. NO blink.. I tried the 16f84.. NO blink.. WOW whats wrong. I tried 45 or 55 times .. NO. blink. I peruse to manuals. I went on internet. I called PBP, You've got to love them for they put up with such as i am. I joined this forum. I wrote the code in MicroCode Studio then selected "compile/Program". It would compile, then started up my MPLAB and leave me in the MPLAB screen. I would select my file. Set my config bits, and select my programmer, then program. There were NO errors, no issues. Also..NO blink. What it programmed into the chip, I have no idea. but it did programm and verify with no errors. What i did WRONG. When PBP brought up my MPLAB and I set my config bits, and selected my programmer.. I DID NOT compile my project in MPLAB.When PBP sends you to MPLAB, YOU have to compile the project. If you do not compile, it will programme something i know not what to the chip, but it will not work.. NOW my LED blinks.. Praise the Lord and thanks to you gentlemen soo much..
jlittle