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