strange problem ! pic18f4550 & pic16f84a serial communication .

[leelion]

Hi Rob:
if pic18f4550 use 16Mhz crystal , how to set 'Config1L to get precise output timing ?

'Config1L
' Full-speed USB Clock Source Selection: Clock Source from 96MHz PLL/2
' CPU System Clock Postscaler: Prescaler Divide by 5 for 20MHz Crystal
' 96MHz Prescaler: Divide by 5 (20MHz Input)
@ __CONFIG _CONFIG1L, _USBDIV_2_1L & _CPUDIV_OSC1_PLL2_1L & _PLLDIV_5_1L

'Config1H
'Oscillator: HS oscillator, PLL enabled, HS used by USB
'Fail-Safe Clock Monitor Enable: Enabled
'Internal External Switch Over Mode: Disabled
@ __CONFIG _CONFIG1H, _FOSC_HSPLL_HS_1H & _FCMEM_ON_1H & _IESO_OFF_1H

thanks , regards
Lee

[richard]

first off this thread has been inactive for 9 years , is it even relevant to your problem ?

if pic18f4550 use 16Mhz crystal , how to set 'Config1L to get precise output timing ?

what output timing ?

what cpu clock are you aiming for ?
do you need usb clock ?

what version of pbp ?
setting config like this is ancient history

@ __CONFIG _CONFIG1L, _USBDIV_2_1L & _CPUDIV_OSC1_PLL2_1L & _PLLDIV_5_1L

why not start a new more relevant thread

[leelion]

first off this thread has been inactive for 9 years , is it even relevant to your problem ?




what output timing ?

what cpu clock are you aiming for ?
do you need usb clock ?

what version of pbp ?
setting config like this is ancient history


why not start a new more relevant thread

hello,
my complier is PBP3 gold 3.0.9.0
16Mhz crystal work with Pic18f4550
output timing means : if I toggle portB.4 200 , led should toggle every 200ms , but it output toggle only every 20ms , how can i set exactly config to get precise output ? thanks

Lee

[richard]

maybe you should post the actual code you are trying

toggle portB.4 200

is not a valid pbp statement

@ __CONFIG _CONFIG1L, _USBDIV_2_1L & _CPUDIV_OSC1_PLL2_1L & _PLLDIV_5_1L

is not a valid pbp3 statement


what cpu clock are you aiming for ?
do you need usb clock ?

did you define OSC?