Re: Starting with a pic

[s1495]

Hello people

I am a n00b to the PICs so far - just got it few days ago off ebay. Soldered onto the board, checked my wiring - no shorts - voltage at the pins is correct. Using this diagram...

**broken link removed**

Using 5 volt DC to drive it off spare computer power supply...
**broken link removed**

I just need to find out if this whole contraption is working.

I've been using IC-Prog 1.05E and trying multiple hex files tried to probe the pins with the yellow wire (hence it sits a pin 1 without being attached firmly). Tried many things without success.

I can program & read data back from the chip using IC-Prog without issues but on it's own in the proto-board - the chip just sits there and doesn't do anything. I turned off the watchdog option and used the XT oscillator in the IC-Prog but still no results.

Could someone suggest a reliable 16f84a(p) HEX program file that would cause all the I/O ports to go high so that I could verify whether this is working with the tiny led. Also - what pic programmer would you guys recommend for use with JDM api.

I just want the simplest reliable way to get this working first.

Any help would be appreciated.

Thanks guys!

 

[3v0]

There is a Newcomers, please read! (PIC regarded) Upd. 0xD sticky thread at the top of the micro controller forum on this board that you should read.

What you are looking for is a blink program.

See for HEX file.
SparkFun also has what you are looking for here. Look for blinkin then the line

16F84A (Hex, Asm, C) - Works with the P18 boards, the PIC-PG4B, and In-Circuit" (note: P18 is PIC 18 pin here)

BlueRoomElectronics has a with ASM source code for a blink and a schematics for setting up the 16F84A.

has good tutorials on his WinPicProg site but uses the 16F628. The 16F84A is quite dated and expensive.

 

[s1495]

Awesome! I appreciate your help so much!

I'll try the new information.

Thanks 3vo!

 

[s1495]

Discovered the issue ...

Have been using ICProg - nice software but writes the hex incorrectly to the chip...

Used PicPgm.. I'm all blinked out

 

[3v0]

How did you discover that ICProg was the problem ?

 

[s1495]

Well, I bought all the components again and used a pin-socket prototyping board this time and kept checking, measuring and staring at the PIC, but I figured before I'd report back here and whine - I'll try few more configurations, voltages, etc.

I noticed verification was working fine right after it programmed but as soon as I told it to accept new configuration and wrote that to the chip, verification started failing tonight.

I found this thread and some other similar info on it with other users having similar error message.

https://www.yelloworb.com/orbblog/?p=221


Switched to PicPGM and it worked right away for any voltage 3 - 9. I also got WinPic and now trying to compile first program in MPLab.