Dear Sir,
I'm looking for the technical support to solve my problem. I've just
involved in using PIC to develop a product. I've just bought the PIC start
plus dev. kit from Farnell (Malaysia). I'm failed for the first project and
discover a very funny problem. I'm currently using P16c84 controller
because it is eeprom base so that I could reprogrammed as many time as I
like.
I used the MPLAB for windows to compile and programmed the chip which come
together with the package. I was building a simple control to monitor to
output at portB and was running under 4MHz crystal. Before I programe the
chip I tested using the simulator and it work. Then I choose the oscillator
type to XT as I'm using crystal to provide the clock. To my dissappointment
The work system just refused to work with all the LED of portB lit up
constantly. While I'm trying to write a flicker LED output at portB with
certain delay(no matter how long I put).
But it really supprised me it work when I touch the crystal with my hand,
bear in mind that I programed the chip with the oscillator option set to
RC. I suppose the clock must be generated from the RC network from our
body. If the oscillator option is set to XT it refused to work even if I
touch the crystal.
Maybe you must be thinking that, the flickering is too fast therefore I
coldn't see the changes. But to prove that, I write another simple program
to test it. This time I wrote a trigger input to change the output. It is a
real simple programme and it still don't work. Therefore I'm writing this
email to seek for help so that to get me through my first project in order
for me to gain back my confident. I used to write assembly programme in the
pass, therefore I do have experience with this low level language.
Or if you have any simple programme for me to try out, please forward it to
me. Beside this, I wonder if the MPLAB got any bug? This is my only last
question asking to myself.
Please help. I urgently required help from you or anybody who can advice
me.

Many thanks in advance.

Sincerely
Alvin Yow