12f675_fuse_about_to_blow!

[LEDave]

Hi mackrackit

I've metered GPIO.0 out to the pot, it does seem to be connected(getting some strange readings though).

I then changed the cable from GPIO.0 to GPIO.4 (and the program to reflect the change) when I send from the serial communicator two LED's briefly flash on then off ( pretty quick though).

I increased the pause time from 250 to 2000, still only a brief flash but definately
flashing!

Dave

[mackrackit]

Two LEDs ???

GPIO.4 is connected to a LED ?

If you have a 14 pin chip try it. I think some of the pins from a 14 will go directly to the J3 header.

Making progress though!!!

[LEDave]

Hi mackrackit

Was getting there, I say was because every time I try and load a program now 'checksum verify failed' appears.Any ideas on that one.

Dave

[mackrackit]

Disconnect the serial cable from the PC?

[LEDave]

Disconnect the serial cable from the PC?

Cured 10-10 mackrackit

I'll change chips in a mo'

Dave

[mackrackit]

GPIO.0 and 1 are programming pins.

At times they need isolated when squirting the code into the chip.

[LEDave]

Here's the latest code, doesn't work though

Is it ok to leave the PIC - pc cable unplugged? If not where should it go?

The PIC is a 16F684

 ANSEL   = %00000000    'Disable analog select so ports work as digital i/o.
CMCON0  = %00000111    'Disable analog comparators.
TRISA   = %00000000    'Set PORTA as OUTPUT.
PORTA   = %00000000    'Set PORTA pins all low.
TRISC   = %00000000    'Set PORTC as OUTPUT.
PORTC   = %00000000    'Set PORTC pins all low.

MYVAR  VAR BYTE 
 
MAIN:
PAUSE 250
SERIN2 PORTA.0, 16780, [DEC MYVAR] '2400 INVERTED
IF MYVAR = 3 THEN HIGH PORTA.5
PAUSE 250
GOTO MAIN

Dave