config help please?

[karenhornby]

Hi all, and before I go any further I want to say thanks to everyone who has helped me before
The previous problem I had about trying to work a serial LCD, I've left that to one side for the moment, however for now... could anyone would be so kind as to look over my code and tell me what they see as obvious ( and not so obvious) mistakes.
The bits I'm not sure about is the config fuses/settings. I'm going to make a seperate mini board to plug a pickit 2 into with basically a 5v psu, 18 pin socket and the pic and any other bits needed like diode, resistor etc.
So ALL the programming will be done OFF the main board and all pins are being used as inputs or outputs only! (All digital)

Ra2
RA3
RA4
RA5 are ALL inputs (digital)

RA1
RA0 outputs to transistor switches
RB6
RB7 Outputs to LED's
so basically all pins are outputs apart from ra2,3,4 and 5 which are inputs.

the pic will be a 16F88
2 X DS18B20 dq from each going to 2 seperate pins ( porta.4 and porta.5 )
LCD 4 bit mode
RS is on portB0
E is PORTB1
Data pins PORTB.2 LCD D7
Data pins PORTB.3 LCD D6
Data pins PORTB.4 LCD D5
Data pins PORTB.5 LCD D4

Really not sure about ALSO the bits parked with ****** in the code i.e. ansel adcon trisa trisb and so on, (or the config fuses) it will be using an 8Mhz ceramic resonator as thats what I've got handy
The other thing I'm not sure about is the actual DS18B20's I dont know if I can have 2 each on a different port and address them as I have done, and IF I can,
How do I set this? DS18B20_12bit CON %01111111 ; 750ms, 0.0625°C resolution?
Sorry it wouldn't let me attach it as code (too big)

[mackrackit]

When setting the TRIS? =%????????
0 is for output
1 is for input

This best explains about setting things to digital.
http://www.picbasic.co.uk/forum/showthread.php?t=561

And when using a resonator the config would be HS.

[karenhornby]

Think i MIGHT have that sorted now

    CCP1CON = %00000000         ; Disable CCP Module
    SSPCON.5 = 0                ; Disable SSP Module
    TXSTA.5 = 0                 ; Disable AUSART Tx
    RCSTA.7 = 0                 ; Disable Serial Port
    CMCON =   %00000111          ; Turn off comparator
    TRISA =    %00111100
    TRISB =    %00000000
    ANSEL =   %00000000  ; Set analog ports to digital mode 
    ADCON1 = %00000111 

Port B is all outputs PortA is where I MAY be going wrong, RA0 in, RA1, in,
RA2 out, RA3out, RA4 out RA5 out 
RA6 and RA7 clock/resonator not sure what they should be?

Although I'm not certain about the TRISA as pins RA6 and RA7 have the resonator connected and not sure if I should have that configured there or not... but every little teaches me more

[mackrackit]

If memory serves me for your chip. It has an internal OSC option. When using the internal then A6 and A7 can be used for I/Os. You are using an external OSC . So your TRIS for this now will only have six bits. PINs 0 through 5.

[karenhornby]

If memory serves me for your chip. It has an internal OSC option. When using the internal then A6 and A7 can be used for I/Os. You are using an external OSC . So your TRIS for this now will only have six bits. PINs 0 through 5.

AHH now that makes sense.. I just wasn't sure what I should do with the pics when using them as ext OSC
Thanks

Apart from that, does the code look ok?
and any ideas on how to set the higher resolution of the ds18B20 with the configuration I have?

[mackrackit]

From memory again. I think the USART on this chip is PORTB.2 and PORTB.5?
And I think PORTA.5 is MCLR.
Check the data sheet to be sure, but I think those parts are wrong in your code.
As for the ds18B20. I can not help with this.

[karenhornby]

Changed it thanks. Hopefully it's right now.

Anyoe know how I program it so the mclr input only works as an input pin and not mclr?
still stuck on the ds too

CCP1CON = %00000000         ; Disable CCP Module
    SSPCON.5 = 0                ; Disable SSP Module
    TXSTB.5 = 0                 ; Disable AUSART Tx
    RCSTB.2 = 0                 ; Disable Serial Port
    CMCON =  %00000111          ; Turn off comparator
    TRISA =  %00111111
    TRISB =  %00000000
    ANSEL =  %00000000  ; Set analog ports to digital mode 
    ADCON1 = %00000111

[mackrackit]

At the same place you set the OSC for HS, either in the *.inc or in code, add this
& _MCLRE_OFF
You chip may not have the "E" on the end. I guess I should pull up the data sheet.

In the MPASM directory there is anothe *.inc file that MPASM uses. Open it and near the bottom it has a listing of all the fuse settings.
This is from that file: Nope, no "E" on this one.

;==========================================================================
;
;       Configuration Bits
;
;==========================================================================

_CONFIG1                    EQU     H'2007'
_CONFIG2                    EQU     H'2008'

;Configuration Byte 1 Options
_CP_ALL                      EQU     H'1FFF'
_CP_OFF	                     EQU     H'3FFF'
_CCP1_RB0		    		 EQU     H'3FFF'
_CCP1_RB3                    EQU     H'2FFF'
_DEBUG_OFF                   EQU     H'3FFF'
_DEBUG_ON                    EQU     H'37FF'
_WRT_PROTECT_OFF             EQU     H'3FFF'	;No program memory write protection
_WRT_PROTECT_256             EQU     H'3DFF'	;First 256 program memory protected
_WRT_PROTECT_2048            EQU     H'3BFF'	;First 2048 program memory protected
_WRT_PROTECT_ALL             EQU     H'39FF'	;All of program memory protected
_CPD_ON                      EQU     H'3EFF'
_CPD_OFF                     EQU     H'3FFF'
_LVP_ON                      EQU     H'3FFF'
_LVP_OFF                     EQU     H'3F7F'
_BODEN_ON                    EQU     H'3FFF'
_BODEN_OFF                   EQU     H'3FBF'
_MCLR_ON		   		     EQU     H'3FFF'
_MCLR_OFF                    EQU     H'3FDF'
_PWRTE_OFF                   EQU     H'3FFF'
_PWRTE_ON                    EQU     H'3FF7'
_WDT_ON                      EQU     H'3FFF'
_WDT_OFF                     EQU     H'3FFB'
_EXTRC_CLKOUT		    	 EQU     H'3FFF'
_EXTRC_IO		    		 EQU     H'3FFE'
_INTRC_CLKOUT                EQU     H'3FFD'
_INTRC_IO		    		 EQU     H'3FFC'
_EXTCLK			    		 EQU     H'3FEF'
_HS_OSC                      EQU     H'3FEE'
_XT_OSC                      EQU     H'3FED'
_LP_OSC                      EQU     H'3FEC'

;Configuration Byte 2 Options
_IESO_ON                     EQU     H'3FFF'
_IESO_OFF                    EQU     H'3FFD'
_FCMEN_ON                    EQU     H'3FFF'
_FCMEN_OFF                   EQU     H'3FFE'



; 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

[mackrackit]

BTW, have you seen this thread?
http://www.picbasic.co.uk/forum/showthread.php?t=543
I keep it bookmarked myself

[karenhornby]

No that was one I missed actually, many thanks, it's good interesting reading, Melanie must be a complete genius

[mackrackit]

No that was one I missed actually, many thanks, it's good interesting reading, Melanie must be a complete genius

She does seem to be always correct.

[Darrel Taylor]

Melanie must be a complete genius

That's a good word too ...
But I'm sticking with the label she's carried for the last few years ... "Goddess"

DT