18F2431 Learning Curve

[Demon]

Oscillator speed?

Or is that not required any more with v3.0 (I'm still on v2.60).

Robert

[Aussie Barry]

I am using the internal oscillator which defaults to 8MHz
I also tried the program with

DEFINE OSC 8

preceeding the LCD definition statements, all to no avail

I was even more disappointed that my Blinky LED program didn't work

TRISA = 0               ' Set PORTA as output

LED    VAR  PORTA.0     ' Assign name "LED" to PORTA.0

mainloop:
   High LED             ' Turn on LED connected to PORTA.0
   Pause 500            ' Delay for .5 seconds

   Low LED              ' Turn off LED connected to PORTA.0
   Pause 500            ' Delay for .5 seconds

   Goto mainloop        ' Go back to loop and blink LED forever
   
   End

I have +5V connecteds to pins 7 and 20 (AVdd and Vdd) and 0V connected to pins 8 and 19 (AVss and Vss). I have a 10k pull-up resistor from MCLR (Pin 1) to +5V and 330R in series with LED connected from RA0 (Pin 2) to 0V. I even tried fliping the LED just in case I put it in backwards!

Any ideas on why this thing won't work as expected?
Perhaps the default for RA0/AN0 is an analog input pin? I thought the TRISA = 0 statement would overide...

Cheers
Barry
VK2XBP

[mackrackit]

How are the configs setup?

[Demon]

I always stay away from analog pins until I get a basic program running.

Robert

[Aussie Barry]

Thanks Robert - Unfortunatley this device has so many options per pin. If I stay away from the analog pins then I run into PWM pins, motion feedback pins and others that I haven't got my head around yet. I thought the RA0/AN0 option was the path of leas resistance.

Dave, I am using my MeProgrammer to configure the device at time of programming.
Details are as follows:
Oscillator = INTRC
Inernal External Switch Over = Enabled
Fail-Safe Clock Monitor - Enabled
Power-Up Timer = Disabled
Brown-Out Reset = Enabled
Brown-Out Reset Voltage = 2.0V
Watchdog Timer = Enabled
Watchdog Timer Postscaler = 1:512
Watchdog Timer Window = Enabled
PWM Pins = Disabled on Reset
Low-Side Transistor Polarity = Active High
High-Side Transistor Polarity = Active High
Special Event Reset = Disabled
MCLR Pin Function = Reset
Stack Overflow/Underflow Reset = Enabled
Low Voltage Programming = Disabled

All other memory options are "Not Protected"

Cheers
Barry
VK2XBP

[Aussie Barry]

Update:

I have added the following lines to my Blinky LED program:

ANSEL0 = 0              ' Set all PORTA as digital I/O
ADCON0.0 = 0            ' Disable A/D module
TRISA = 0               ' Set PORTA as output

I was confident I would see a blinking LED after these changes but was sadly mistaken...

Cheers
Barry
VK2XBP

[mackrackit]

Some will disagree, but I have never trusted the programmer to set the configs.
What version of PBP are you running?