Trying to get LCD to work on 18f45k22 and portB and EasyPic V7 - no luck

[richard]

your config is incorrect for those settings

ASM
  __config  _CONFIG1H, _FOSC_HSHP_1H & _PLLCFG_ON_1H & _PRICLKEN_OFF_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
  __config  _CONFIG2L, _PWRTEN_OFF_2L & _BOREN_SBORDIS_2L & _BORV_190_2L
  __config  _CONFIG2H, _WDTEN_ON_2H & _WDTPS_32768_2H
  __config  _CONFIG3H, _CCP2MX_PORTC1_3H & _PBADEN_OFF_3H & _CCP3MX_PORTB5_3H & _HFOFST_ON_3H & _T3CMX_PORTC0_3H & _P2BMX_PORTD2_3H & _MCLRE_EXTMCLR_3H
  __config  _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L & _DEBUG_OFF_4L
  __config  _CONFIG5L, _CP0_OFF_5L & _CP1_OFF_5L & _CP2_OFF_5L & _CP3_OFF_5L
  __config  _CONFIG5H, _CPB_OFF_5H & _CPD_OFF_5H
  __config  _CONFIG6L, _WRT0_OFF_6L & _WRT1_OFF_6L & _WRT2_OFF_6L & _WRT3_OFF_6L
  __config  _CONFIG6H, _WRTC_OFF_6H & _WRTB_OFF_6H & _WRTD_OFF_6H
  __config  _CONFIG7L, _EBTR0_OFF_7L & _EBTR1_OFF_7L & _EBTR2_OFF_7L & _EBTR3_OFF_7L
  __config  _CONFIG7H, _EBTRB_OFF_7H
ENDASM

and you need a


define OSC 32

statement in your code

why use a xtal ? why run at 8MHz ?
when the chip has a int osc that can do 64mhz

[dbachman]

Well that worked fine.....
Well the board has a crystal hook up but can be strapped in and out.
I did try just the define osc 32 with my config and it also worked...
as you probably surmised, I am pretty much a newbie..so why the ocs 32 define and say not 16 or 8?

By the way thanks a bunch

[richard]

define OSC 32
tells the compiler to perform all timing calculations for a clock speed of 32 MHz
it defaults to 4 MHz if omitted , it should match the real clock speed used
using 8 or 16 is simply wrong


_PLLCFG_ON with a 8mhz xtal yields a 32 MHz clock

no point guessing read the manual, read the data sheet

[dbachman]

Soif I was using an internal oscillator, I would define it in Config1h and further in OSCCON?

[richard]

using an internal oscillator, I would define it in Config1h and further in OSCCON?

yes

not forgetting if and when the pll is engaged
and setting define OSC appropriately

there is a tool called meconfig , look it up and download a copy , it makes life easier.
pity is that melabs don't update things much anymore so newer chips are missing , its still useful though

[dbachman]

Ok Richard Thank you but it looks like meconfig is not anywhere.. at least I couldn't find it to download..I will keep looking but ME labs has a posting that is discontinued and end of life....

[richard]

I couldn't find it to download.

me either, thats a shame . i better not have another pc crash or that may be the end of it


welcome to the Death Spiral of legacy software

seems the spiral is tightening