RA6 & RA7 I/O setting on the 16F88

[peterdeco1]

I have an idea. Copy this code exactly and tell us if RA6 and RA7 ports flash an LED. Put about 100 ohms on 1 side of the LED. I just tried it with a 16F88 and it works for me.

OSCCON = $60 'set int osc to 4mhz
ANSEL = 0 'ALL DIGITAL
CMCON = 7 'COMPARATORS OFF

TRISA = %00000000 'ALL OUTPUTS
TRISB = %00000000 'ALL OUTPUTS
PORTA = 0 'PORTA LOW

@ DEVICE MCLR_OFF, INTRC_OSC, WDT_ON, LVP_OFF, BOD_OFF, PWRT_ON, PROTECT_ON
Pause 100 'SETTLE DOWN

START:
High PORTA.6 'ON LED
High PORTA.7
Pause 1000
Low PORTA.6 'OFF LED
Low PORTA.7
Pause 1000
GoTo START 'REPEAT FOREVER

[skimask]

I have an idea. Copy this code exactly and tell us if RA6 and RA7 ports flash an LED. Put about 100 ohms on 1 side of the LED. I just tried it with a 16F88 and it works for me.

One question is left unanswered though...is this with or without a modified 16f88.INC file?
And I'm not sure if an LED will flash with +5v on both sides and ground on both sides

[peterdeco1]

Sorry if I wasn't clear. It works for me without a modified inc file. And the LED's connect from the port pins to ground. Now come on. You knew that didn't you Skimask?

[skimask]

Sorry if I wasn't clear. It works for me without a modified inc file. And the LED's connect from the port pins to ground. Now come on. You knew that didn't you Skimask?

Yep, just quietly pointing out a few 'options'!

[leisryan]

If using MPASM use this!!! Use both config!!!

; To use the Configuration Bits, place the following lines in your source code
; in the following format, and change the configuration value to the desired
; setting (such as CP_OFF to CP_ALL). These are currently commented out here
; and each __CONFIG line should have the preceding semicolon removed when
; pasted into your source code.

;Program Configuration Register 1
; __CONFIG _CONFIG1, _CP_OFF & _CCP1_RB0 & _DEBUG_OFF & _WRT_PROTECT_OFF & _CPD_OFF & _LVP_OFF & _BODEN_OFF & _MCLR_OFF & _PWRTE_OFF & _WDT_OFF & _HS_OSC

;Program Configuration Register 2
; __CONFIG _CONFIG2, _IESO_OFF & _FCMEN_OFF

[leisryan]

;************************************************* ***************
;* 16F88.INC *
;* *
;* By : Leonard Zerman, Jeff Schmoyer *
;* Notice : Copyright (c) 2004 microEngineering Labs, Inc. *
;* All Rights Reserved *
;* Date : 01/07/04 *
;* Version : 2.45 *
;* Notes : *
;************************************************* ***************
don't forget to comment out the following in the 16F88.INC file


NOLIST
ifdef PM_USED
LIST
include 'M16F88.INC' ; PM header
; device pic16F88, hs_osc, wdt_on, lvp_off, protect_off
XALL
NOLIST
else
LIST
LIST p = 16F88, r = dec, w = -302
INCLUDE "P16F88.INC" ; MPASM Header
; __config _CONFIG1, _HS_OSC & _WDT_ON & _LVP_OFF & _CP_OFF
NOLIST
endif
LIST

[PICante]

Thanks guys,

Just returned from my vacation!

>leisryan: I tried your suggestion but I get two warnings compiling and the PIC hangs if I program it despite the warnings.

Is there no possible way to set the CONFIG1 (FOSC) bit 4, 1 and 0 to (%1XX00) in the code without disturbing other settings?

Thank you!