pic12F683 , gpio.5 not accessible...

[flipper_md]

Hello all

I've got my project quickly up n running thanks to Darrel's Instant Interrupts, but now I would like to use all pins on the 12F683 and my GPIO is just the most useless i've ever seen!!


-I've try two different chip, same result
-hack of options and settings, nothing, niet, nada

ANSEL = %00000000 ' No Analog input, set all digital
CMCON0 = %00000111 ' turn comparators off 07H
TRISIO = %011100 ' inputs, outputs
GPIO = %000000 ' outputs low << very important it seems!!
OSCCON = %01110000 ' Internal 8MHz osc set speed


I just want to use it as a button, or serial out, but no can do so far, it gives zEro volts, and react to nothing as a digital pin...unless I got a stupid mistake in my settings.

others GPIO works fine (0to4), i get my serialLCD going no prob on GPIO.1


thnx for help.


So here is some more of the code, in case youd see the obvious bug:

include "DT_INTS-14.bas" ;' DT Instant interrupt routines
include "Elapsed_INT.bas" ;' Timer routines


include "ReEnterPBP" ;' code is begin me to add this...

Include "modedefs.bas" ' Serial port routines

define OSC 8

; settings in INC file
' set in INC file => device pic12F683, intrc_osc_noclkout, wdt_off, mclr_off, protect_off ; FOR INSTANT INTERRUPT

INTCON = 0 'Do not use PBP interrupts

ANSEL = %00000000 ' No Analog input, set all digital
CMCON0 = %00000111 ' turn comparators off 07H
TRISIO = %011100 ' inputs, outputs
GPIO = %100000 ' outputs low << very important it seems!!
OSCCON = %01110000 ' Internal 8MHz osc set speed


' ******** Instant Interrupt setup ***************************
ASM
INT_LIST macro ; IntSource, Label, Type, ResetFlag?
INT_Handler INT_INT, _DetectSendLaps, PBP, yes
INT_Handler TMR1_INT, _ClockCount, PBP, yes
endm
INT_CREATE ; Creates the interrupt processor

INT_ENABLE INT_INT ; enable external (INT) interrupts
INT_ENABLE TMR1_INT ; Enable Timer 1 Interrupts
ENDASM

; OPTION_REG = OPTION_REG & $80 | 1 ; Set TMR0 Prescaler to 256, leave RBPU alone, adjust for Xtal freqz

LED1 VAR GPIO.0
LCDport VAR GPIO.5 'LCD*communication port

Output GPIO.0
Output GPIO.1
Input GPIO.2
Input GPIO.3
Input GPIO.4
Output GPIO.5

pause 1200 'let the LCD boot

'Custom character for LCD
'Empty heart
serout LCDport, N9600, [18, 64, $0A, $15, $11, $0A, $04, $00, $00, $00 ]
'Filled heart
serout LCDport, N9600, [18, 72, $0A, $1F, $1F, $0E, $04, $00, $00, $00 ]

serout LCDport, N9600, [ 12 ]
serout LCDport, N9600, [ 12 ]

[mackrackit]

GPIO = %000000 ' outputs low << very important it seems!!

I just want to use it as a button, or serial out, but no can do so far, it gives zEro volts, and react to nothing as a digital pin...unless I got a stupid mistake in my settings.

Try setting as an input.

GPIO = %000001

[flipper_md]

well, I went aroudn trying pretty much every combination possible...

TRISIO = %101100
GPIO = %100001

TRISIO = %101100
GPIO = %000001

TRISIO = %001100
GPIO = %000001

TRISIO = %101100
GPIO = %000000

there's just no way to turn on a LEd on that GPIO.5

reading the spec sheet, it's a TLL cmos like all other ports... I can't see the missing link :<


any working code that use that port as digital IO?


tnx Dave for the quick reply

[Archangel]

flipper_md
>>well, I went around trying pretty much every combination possible...

TRISIO = %101100 <font color=red>= Ports 2,3,5 AS INPUTS 0,1,4 as outputs</font color>
GPIO = %100001 GPIO sets ports high or low if outputs, not if inputs. . . .

TRISIO = %101100
GPIO = %000001

TRISIO = %001100 Here port.5 is an output, 2-3 as inputs
GPIO = %000001 Port zero is output high

TRISIO = %101100
GPIO = %000000

there's just no way to turn on a LEd on that GPIO.5

reading the spec sheet, it's a TLL cmos like all other ports... I can't see the missing link :<


any working code that use that port as digital IO?

http://ww1.microchip.com/downloads/e...Doc/41211C.pdf

[Darrel Taylor]

; settings in INC file
' set in INC file => device pic12F683, intrc_osc_noclkout, wdt_off, mclr_off, protect_off ; FOR INSTANT INTERRUPT

If you're using Instant Interrupts, the program has to be assembled with MPASM.

Look at the __CONFIG line in the 12F683.inc file, not the device line.
<br>

[Archangel]

If you're using Instant Interrupts, the program has to be assembled with MPASM.

<br>

Hi Darrel,
I thought he was as he did not report any compiler errors, doesn't PM choke on DT_I.I.?