Re: [Flashforth-devel] strange answer from UART

[Thomas B. <bus...@gm...>]

Hallo, sorry for disturbing - but thats are my further test results:

Freq - OSC - Baud = Status
-------------------------------
16 MHz - HSPPL - 9600 = working
16 MHz - HSPPL - 38400 = working
8 MHz - INTIO67 - 9600 = working (without oszi)
32 MHz - INTIO67 - 9600 = working (without oszi and PPLEnable)
32 MHz - INTIO67 - 38400 = working (without oszi and PPLEnable)

It seems I test the last weekend everytime with a wrong configuration :-)

Thank You all

Bye Thomas



2014-03-17 19:24 GMT+01:00 Mikael Nordman <mik...@pp...>:

> Hello !
> With the 4 MHz external clock the following should work:
>
> HSPLL , 9600 ,  constant clock=d'16000000'
> HSPLL , 38400 ,  constant clock=d'16000000'
>
>
> FlashForth always configures the internal clock to run at 8 MHz.
> With the internal oscillator the following should work.
> INTIO67 , 9600, constant clock=d'8000000'
>
> The INTIO67 with PLL requires that the PLL is enabled in software.
> There is a define missing in the processor configuration file for that.
>
> The INTIO67 with PLL requires that you define in
> p18f2525-2620-4525-4620.cfg
> ;;; Activate 4xPLL from SW for INTOSC modes in FlashForth 5.0
> #define PLL ENABLE             ; ENABLE or DISABLE
>
> and then these should also work
>
> INTIO67 , 9600 , constant clock=d'32000000'
> INTIO67 , 38400 , constant clock=d'32000000'
>
> BR Mike
>
> On 03/17/2014 06:14 PM, Thomas Buschhardt wrote:
> > Hallo now I was able to run it :-)
> >
> > Here are my tested configs
> > OSC - Baud = Status
> > -----------------------------------
> > ECIO6 - 9600 = working
> > ECIO6 - 14400 = not working
> > ECIO6 - 38400 = not working
> > INTIO7 - 9600 = not working (without oszi)
> > INTIO67 - 9600 = not working (without oszi)
> > HSPLL - 9600 = not working
> > HSPLL - 38400 = not working
> >
> > Thank you all very much
> > Thomas
> >
> >
> > 2014-03-17 13:03 GMT+01:00 Peter Jacobs <pe...@me...
> > <mailto:pe...@me...>>:
> >
> >     Thomas,
> >     Looking at sections 2.x in the datasheet, it seems to me that the
> >     PLL is not exclusively for crystals and resonators; it available
> >     to the 4 and 8MHz internal oscillator.  Figure 2.8 shows it
> >     limited to these options.  That figure is (presumably) a
> >     simplified diagram and I don't know enough to be sure what would
> >     happen if you set OSC=HSPLL and drive the OSC1 pin with your
> >     external oscillator.  Would you be abusing the silicon?  You
> >     wouldn't be able to use RA6 as an IO pin but that might be OK
> >     since you don't show it in use on your diagram.
> >     Peter J.
> >
>
>
>
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