4550 osc

[Macgman2000]

First we need some info....What chip body? What compiler version? Is it a 20Mhz crystal or resonator?

Nick

[MyBuddy]

18f4550 is the chip, 40 pin dip. I'm using PicBasic Pro 2.46. And it's a quartz crystal.

[comwarrior]

have you put capacitors between the oscilator pins and ground?

[MyBuddy]

Yes, did that. 22pF

Reset is high, too.

[comwarrior]

ok, cool, thaught i'd ask a stupid question...

i used the 18F4550 myself and i also use the same OSC so, i'll run through my settings, however, i'm using winpic800 with a JDM programmer...

OSC: HS oscillator, PLL enabled, HS used by USB
CPU system clock: 96MHz PLL dev 5
Oscilator selection: Devide by 5 (20MHz input)
Vbor: 2.7V
Brown-out restet: Enabled in hardware only
Watchdog: 1:32768
FCMEM enabled
IESO enabled
WDTEN enabled
PWRTEN disabled
CCP2MX enabled
PBADEN enabled
LPT1OSC enabled
MCLRE disabled
DEBUG disabled
STVREN enabled
LVP enabled
ICPORT enabled
XINST enabled
USBPLL enabled
VREGEN enabled

All CP's are disabled
All EBT's disabled
All WRT's disabled

Acording to oshonsoft's pic18 simulator IDE the BASIC code for those options are asfollows...

Define CONFIG1L = 0x3C
Define CONFIG1H = 0xCE
Define CONFIG2L = 0x17
Define CONFIG2H = 0x1F
Define CONFIG3L = 0x00
Define CONFIG3H = 0x07
Define CONFIG4L = 0xE1
Define CONFIG4H = 0x00
Define CONFIG5L = 0x0F
Define CONFIG5H = 0xC0
Define CONFIG6L = 0x0F
Define CONFIG6H = 0xE0
Define CONFIG7L = 0x0F
Define CONFIG7H = 0x40

Hopefully, some of that will help...
if not, can you post a screen shot of your programmers config options screen?

Thanks

[MyBuddy]

Hmm, I was hoping I wouldn't have to learn what a .asm file was...

[mackrackit]

Hmm, I was hoping I wouldn't have to learn what a .asm file was...

What ASM?
This is all about setting the configs like you would with any PIC.

[comwarrior]

Hmm, I was hoping I wouldn't have to learn what a .asm file was...

This has nothing to do with ASM (assembler)
Take a screen cap of your programmer screen with all your osc config options on and i'll look see if you have anything set wrong...

:edit
I've just sorted out my fuse options for use with MPASM... Been meaning to do them but couldn't previously be botherd...

Now, assuming your using MPASM for compiling this needs to be the first line in your BAS file...

@ __config _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L & _FOSC_HSPLL_HS_1H & _FCMEN_ON_1H & _IESO_ON_1H & _PWRT_ON_2L & _BOR_ON_2L & _BORV_2_2L & _VREGEN_ON_2L & _WDT_ON_2H & _WDTPS_32768_2H & _MCLRE_OFF_3H & _LPT1OSC_ON_3H & _PBADEN_OFF_3H & _CCP2MX_ON_3H & _STVREN_OFF_4L & _LVP_OFF_4L & _ICPRT_OFF_4L & _XINST_ON_4L & _DEBUG_OFF_4L & _CP0_OFF_5L & _CP1_OFF_5L & _CP2_OFF_5L & _CP3_OFF_5L & _CPB_OFF_5H & _CPD_OFF_5H & _WRT0_OFF_6L & _WRT1_OFF_6L & _WRT2_OFF_6L & _WRT3_OFF_6L & _WRTB_OFF_6H & _WRTC_OFF_6H & _WRTD_OFF_6H & _EBTR0_OFF_7L & _EBTR1_OFF_7L & _EBTR2_OFF_7L & _EBTR3_OFF_7L & _EBTRB_OFF_7H

The list of fuse options avaliable for MPASM can be found in C:\Program Files\Microchip\MPASM Suite
The INC file for the pic contains the fuse options, so for the 18F4550 you need to open the file C:\Program Files\Microchip\MPASM Suite\P18F4550.INC in notepad or Microcode studio or with MPLAB...
If you don't know what the options are for, thats where searching the datasheet comes in...