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HI,
I TRY to set up to run the osc internal @64Mhz, but fail.
conf_1H: FOSC_INTIO67 (or FOSC_INTIO7) ;OTHER config's of 1H are off
OSCCON = $70 (16MHZ selected)
OSCTUNE = $40 (enable PLL)
the output @portb.6 fail (no power)-and data out from other pins runs fast
OSCTUNE =$40 {omitted)
data out from portb runs well, but slow and low power @ output
i also try to set OSCTUNE TO $CF, maximum frequency and PLL enable, but portb.6 still lost power
so what wrong?
any help i do appriciate
tks in ad.
try osccon.1 =1
failing that post your code and tell us what version of pbp you are using
This could help.
Attachment 7406
OSCCON 6:4 need setting for 16 MHZ which is $70, which is what you have.
OSCTUNE 6 needs setting to connect internal oscillator to 4xPLL $40, which you have.
Looking at the Internal Oscillator Block OSCCON 1:0 have an effect and from the datasheet.
bit 1-0 SCS<1:0>: System Clock Select bits
1x = Internal oscillator block
01 = Secondary (Timer1) oscillator
00 = Primary clock (determined by CONFIG1H[FOSC<3:0>]).
which tells me, if I understand correctly, that OSCCON 1 needs setting. Which is what Richard said.
Which now makes OSCCON $72.
Last there is config1H for HSPLL and HFINTOSC/PLL
_FOSC_HSPLL_1H EQU H'F6' ; HS oscillator, PLL enabled (Clock Frequency = 4 x FOSC1)
_FOSC_INTIO67_1H EQU H'F8' ; Internal oscillator block, port function on RA6 and RA7
_FOSC_INTIO7_1H EQU H'F9' ; Internal oscillator block, CLKOUT function on RA6, port function on RA7
which I leave to you or others to explain, I use boot loader and never used configs.
THANSKS alot for your help.
yes, i try
OSCCON = $72,
OSCTUNE = $40
the problem still persises.
portb.6 lost power. but it runs faster
-------------------------------------------------------------------------------
here is the conf.
__CONFIG _CONFIG1H, _FOSC_INTIO7_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
__CONFIG _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H' __CONFIG _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _HFOFST_ON_3H & _MCLRE_ON_3H
__CONFIG _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L
OSCCON = $72,
OSCTUNE = $40
-----------------------------------------------------------------------------
portb = 0
latb = 0
trisb = 0
----------------------------------------------------
about the SCS it is automatic set to 00- becasue in the CONFI_1h --- FOSC_INRIO67- (IT IS determined by primary osc in the 1H line)
here is the explaination in the data sheet
------------------------------------------============
2.9.1 SYSTEM CLOCK SELECT
(SCS<1:0>) BITS
The System Clock Select (SCS<1:0>) bits of the
OSCCON register select the system clock source that
is used for the CPU and peripherals.
• When SCS<1:0> = 00, the system clock source is
determined by configuration of the FOSC<2:0>
bits in the CONFIG1H Configuration register.
• When SCS<1:0> = 10, the system clock source is
chosen by the internal oscillator frequency
selected by the INTSRC bit of the OSCTUNE
register and the IRCF<2:0> bits of the OSCCON
register.
• When SCS<1:0> = 01, the system clock source is
the 32.768 kHz secondary oscillator shared with
Timer1.
After a Reset, the SCS<1:0> bits of the OSCCON
register are always cleared.
-----------------------------------------------------------
the version, of pbp. it is 2.6c
i read the post of: http://www.microchip.com/forums/m730158.aspx-
also mentioned the same issue- but the PLLCFG is not recognized in the PBP
thanks for your concern,
regards
try a __CONFIG _CONFIG4L, _DEBUG_OFF in your configs
as henrik wrote yesterday in a similar post the config option's syntax can be found in the pic18f26k20.inc file in your relevant version mpasm directory
interestingly there is a PLLCFG = ON in the pbp3 device reference config options
look like a _PLLCFG_ON_1H is what you need
HELLO,
thanks for your guide,
YES i try & _DEBUG_OFF_4L
OSCCON = $72 (OR $70)
OSCTUNE = $40
PROBLEM PERSIS (slow)
i will see the inc directory of mpas
is it effected by the hc595?
i found that its max freq. is 25MHz
however, i test the 595 runs well @40mhz
thanks a gain for your contribution
regards
Very interesting thanks.Quote:
Yes one of the settings that worked in the above link is.
__CONFIG _CONFIG1H, _FOSC_INTIO67_1H
OSCCON = $70
OSCTUNE = $40
Is that not what you started with?
Y]hello,
yes the above is work.
..
osccon = $70 or (60)
osctune = $40
for single leds
i move to drive 595 then there r problem- lost power or low speed @ out put
now i try to clean the pbp to see waht happen'
thenak for your help.
regards
HI ALL,
the pic run well @ 4mhz ,HSPLL; 8, 10mhz ... problem (HSPLL).
the conf. remains unchanged
__CONFIG _CONFIG1H, _FOSC_HSPLL_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
__CONFIG _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H
__CONFIG _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _HFOFST_ON_3H & _MCLRE_ON_3H
__CONFIG _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L & _DEBUG_OFF_4L
where is the problem?
thanks all for your help
regards
minhle
quite a lot here seems to be lost in the translation somehow
what does this mean ?Quote:
the output @portb.6 fail (no power)-and data out from other pins runs fast
have you now changed to using an external xtal ?Quote:
the conf. remains unchanged
__CONFIG _CONFIG1H, _FOSC_HSPLL_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
__CONFIG _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H
__CONFIG _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _HFOFST_ON_3H & _MCLRE_ON_3H
__CONFIG _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L & _DEBUG_OFF_4L
what is a 595 ? do you mean a 74hc595 ?Quote:
i move to drive 595 then there r problem- lost power or low speed @ out put
if so a "595" can clock in data @100mhz which will be at least 10x greater than a bit banged routine could achieve even at 64mhz clock
can I suggest you just try to "blink a led" on say portb.6 and see if it blinks at the correct rate , if not then post your complete code for further evaluation
The conf. has changed from #4Quote:
Originally Posted by MINHLE
also you saidQuote:
here is the conf.
__CONFIG _CONFIG1H, _FOSC_INTIO7_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
__CONFIG _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H' __CONFIG _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _HFOFST_ON_3H & _MCLRE_ON_3H
__CONFIG _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L
If it works for single leds then it works and all of your code needs checking. So please post your code so we can help.Quote:
yes the above is work.
..
osccon = $70 or (60)
osctune = $40
for single leds
i move to drive 595 then there r problem- lost power or low speed @ out put
HI,
thanks for your help.
i suspect st wrong,
i test the whole port b. it runs well (8 leds) - FOSC_INTIO67 (16x4mhz)
However, when attaching portb to the 74hc595 - then 1 of the port pin lost power.
just last week, the system run well @40mhz. (external osc).
now problem is data to send out is not right
i will spend 1 more time to check, and will send the program to you
regards
I'm not really sure what this means , its rather ambiguousQuote:
when attaching portb to the 74hc595 - then 1 of the port pin lost power.
perhaps a schematic diagram (or a photo) of your setup would be in order
HI,,
thANKS A LOT RICHARD,
I MOVE TO USE 18F4620, THE PREVIOUS CONF. IS FINE (internal osc*4 = 32 mhz)
the program runs well @40mhz (external osc) then there are problems
i.e. data output randomly- (due to dirty breadboard)
line appears on the screen (same cause above).
i will going back to see the 18f26k20.next week.
thanks again
regards
As requested by others, post your complete code and a schematic of your circuit.
Have you disabled analog features on any pins you use as digital?
Robert
HI ALL
THANKS for all
the program actually runs well, but the pause time is not correct and the current supply is not adequate ( due to dirty breadboar...)
at high frequency, some of the port pins is measured = 0, (when the port drives other ic) look like there is no power at all.
the set up is right:
_FOSC_INTIO67_1H
OSCTUNE = $40
OSCCON = $70
the PBADEN = OFF, so the portb is digital I/O
thanks a gain for all
regards