Clear Command stops 18F4525 dead

[Bruce]

Does it work if you change OSCCON = %01110001 to OSCCON = %01110000?

P.S. Assuming you have an older version of PBP, you might be missing a BANK15 declaration in
18F4525.BAS.

Open 18F4525.BAS and make sure it has BANK15 $0F00, $0F7F just after BANK14 $0E00, $0EFF.

[khufumen]

Bruce,
I checked the bas file and it has the line of code in it that you thought might be missing. I'm running
the lastest PicBasicPro with the Long variable capabilities. I took out the 18F4525 and replaced it
with an 18F458 and everything runs fine. This should eliminate the possibility that it was the board I'm
using. I noticed that the 18F4525 cannot make use of the DEBUG command. Maybe there is
something else in the 18F4525 that doesn't like the CLEAR command. hmmm..........

[Bruce]

Comment out DEBUG EQU H'0FD4' in the P18F4525.INC file. Then you can use DEBUG.

[khufumen]

Eliminating that Debug issue works great! Thanks... It was a pain writing all those SEROUT2
commands. I'm just going to ignore the Clear command issue I'm having and just zero out my
variables manually. I tried using an an 8Mhz external oscillator as opposed to the internal one I was
using in the code above and I still got a problem with the clear command.

[Bruce]

CLEAR should still work! What are your config settings when using the 18F4525?

[khufumen]

Configuration commands I am using are:

Oscillator = INTRC (INTIO2)
Fail Safe Clock Monitor = Disabled
Internal External Switchover = Disabled
The configuration settings I am using are:

Powerup Timer = Disabled
Browout Reset = Enabled, SBOREN Disabled
Brownout Reset Voltage = 4.2V
Watchdog Timer = Enabled
Watchdog Timer Postscaler = 1:2
CPP2 Multiplexed with B3
PORT B Reset State = Digital I/O
Low Power Timer1 Oscillator = Higher Power
MCLR Pin Function = Input Pin
Stack Overflow / Underflow Reset = Enabled
Low Voltage Programming = Disabled
Enhanced CPU = Disabled

[Bruce]

See if CLEAR works with the watchdog timer disabled. With a WDT postscaler of 1:2 and a WDT timeout period of 4mS x the postscaler, you only have ~8mS before the WDT times-out and causes a reset.

The CLEAR macro doesn't have clrwdt instructions, and it takes ~9.91mS to clear all RAM in this part, so it resets before it has time to clear RAM. You can also bump-up the postscaler to something > 10mS, and it should work.