16f886

[skimask]

I upgraded from 16F689 to 16F886 due to memory space......
comparators are off, ADC are off. I tried everything else getting all RA's LOW.

The controlling registers for the comparators and the ADC are a bit different between the '689 and the '886, different values are required in the registers themselves. So, if you're using the same code and expecting it to work, it probably won't.
But, we'll never know without seeing some code!

[hvacrtech]

Here is the code,

Similar idea as first post and still cant get LED flashing even after adding a line for device, i do get RA.6 low but still dont flash yet. without this device line, the pin stays high.



@ INCLUDE "16F886.INC"
Include "bs2defs.bas"

@ DEVICE PIC16F886, INTOSCIO,WDT_ON,MCLR_OFF,LVP_OFF,PROTECT_OFF,BOD_O FF,CPD_OFF,IESO_OFF,FCMEN_OFF,PWRT_OFF 'Device line
define osc 4
OSCCON=%01100000
'ANSEL=0
'ANSELH=0
' ADCON1=$0F ' all digital
'adcon0.0 = %0
ANSEL=%00000000
trisa= %00000000 '%00011100 used in upgrade
'porta=%00000000
' ADCON0 = $00
'cm1con0.7=0
'cm2con0.7=0
'CM1CON0=0 ' need it?
'CM2CON0=0 ' need it?




'CM1CON0 = 0
'CM2CON0 = 0

run:
high 6
pause 1000
low 6
pause 1000
goto run

[skimask]

@ INCLUDE "16F886.INC"

SHOULDN'T need this line...

Include "bs2defs.bas"
@ DEVICE PIC16F886, INTOSCIO,WDT_ON,MCLR_OFF,LVP_OFF,PROTECT_OFF,BOD_OFF,CPD_OFF,IESO_OFF,FCMEN_OFF,PWRT_OFF 'Device line
DEFINE OSC 4 <-ALL DEFINES MUST BE IN CAPS,
'but 4Mhz is the default so it doesn't help or hurt here
OSCCON=$60 : ANSEL=0 : ANSELH=0 : ADCON1=$0F
adcon0=0 : trisa=0 : porta=0
run:
porta.6=1 : pause 1000 : porta.6=0 : pause 1000 : goto run
END <- good practice

[hvacrtech]

My code works. This is really interesting difference between typing in ports on 16F689 and 16F886 like 6 on 16F689 while porta.6 on 16F886 (lower cap works!) and will be sure all are Upper Cap.

I could see the 'Scope high/low.

I copied your code and it produce errors with OSC registery and I rem some, still producing errors.

[hvacrtech]

I need help on 16F886, is there config to disable MSSP?

[mister_e]

Here's some suggestion in case of doubt

1. Open the datasheet under the Pin diagram section (Page 5)
2. See what else your pin may have on (ADCs, Comparator etc etc)
3. if so refer to each section of the extra module you want to disable, or see if they're already enable at POR

Here you don't have anything else than MSSP Pins... so let's see section 13 and it's related Registers.

Register 13-1: SSPSTAT
Nothing in the list seems to enable/disable the module, let's go to the next one

Register 13-2: SSPCON
SSPEN bit 5

bit 5 SSPEN: Synchronous Serial Port Enable bit
In both modes, when enabled, these pins must be properly configured as input or output

In SPI mode:
1 = Enables serial port and configures SCK, SDO, SDI and SS as the source of the serial port pins
0 = Disables serial port and configures these pins as I/O port pins

In I2 C mode:
1 = Enables the serial port and configures the SDA and SCL pins as the source of the serial port pins
0 = Disables serial port and configures these pins as I/O port pins

this bit should be =0 to disable the MSSP port, the POR values says it's already 0. Good practice to clear it yourself for safety sake, while not 100% needed.

same for all other register.. if there's any other

HTH

[hvacrtech]

Somehow the RA.5 randomly stays high since I use RA.5 as pulseout. Even that ADC is disabled, comparator disabled.

Include "bs2defs.bas"
define lcd_dreg portc
define lcd_dbit 0 '0
define lcd_rsreg portc
define lcd_rsbit 4
define lcd_ereg portc
define lcd_ebit 5
define lcd_bits 4
define lcd_lines 2
define lcd_commandus 1500 '1500 2000
define lcd_dataus 44 '44
PAUSE 1000
ADCON1=$0F ' all digital
ANSEL=%00000000

ADCON0 = $00
anselh = %0010 'Convert from Analog input to Digital input.
trisb = %0010 '0=output, 1=input in analog.
anselh = %01000000 'sets portc.6 as input
trisc =%01000000 'sets portc.6 as input
start:

lcdout $FE,1,"TEST THE LCD"

lcdout $FE,$C0," TEST"
PAUSE 1000
high porta.2
pause 500
low porta.2
pause 500
high portb.5
pause 500
low portb.5
lcdout $FE,1,"RESETTING"
pulsout porta.5,1000
pause 1000
pulsout porta.5,1000
pause 1000
goto start



Above program works, but when in big program, RA.5 stays high.

in other program, the following list is added

ANSEL=%00100100 'Rev E
TRISA=%00000011 'Rev E
ADCON1 = %1
ADCON0 = %01000101 'Rev E
CM1CON0.7 = 0 'disables comp1
CM2CON0.7 = 0 'disables comp2
SSPCON.5 = 0 'disables MSSP
'ADCON1=$0F

and those line
pulsout porta.5,1000


that way randomly staying high and no longer getting pulsout. strange.