82C54 on BS2e
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Posts: 46,084
Does anybody know how to control 82C54 Programable Timer from Bs2e?
Is possible to use BS2e I/O pins as 82C54 data bus and address bus?
if Anybody have a sample code or documentation about this question,
please send me.
thank's
Vanderson
Is possible to use BS2e I/O pins as 82C54 data bus and address bus?
if Anybody have a sample code or documentation about this question,
please send me.
thank's
Vanderson
Comments
using it as a high-speed interface to a PC, instead of the clunky serial
port method. I have some pretty basic Mode-0 I/O working already talking to
a PORT-A bus. I haven't attempting using interrupt signaling yet....I
should give it a whirl in the next day or two. I'll post my results when I
have some.
- Ted
Original Message
From: kloggerr [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=SbQ_KH0YV7osjCJ-yIA8EM1MkF4afJZb35Ahlp5757WBk3aMI854tJ2OC4mEQKYaB7WixriQw4lzdwQHhw]loggerr@b...[/url
Sent: Thursday, April 10, 2003 7:21 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] 82C54 on BS2e
Does anybody know how to control 82C54 Programable Timer from Bs2e?
Is possible to use BS2e I/O pins as 82C54 data bus and address bus?
if Anybody have a sample code or documentation about this question,
please send me.
thank's
Vanderson
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structure. The *INTerrupt pin from the 8255 can only
go into a discrete I/O pin which is then _polled_ for
the active level.
kevin
--- Ted Larson <ted@l...> wrote:
>
> I have just started fooling with talking to an 8255
> from an BS2SX. I am
> using it as a high-speed interface to a PC, instead
> of the clunky serial
> port method. I have some pretty basic Mode-0 I/O
> working already talking to
> a PORT-A bus. I haven't attempting using interrupt
> signaling yet....I
> should give it a whirl in the next day or two. I'll
> post my results when I
> have some.
>
>
> - Ted
>
>
>
Original Message
> From: kloggerr [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=xpLjwbhsyvBYv4bKu9udFmFfQhSLuYprpGVmMO7-QlFJhD9jar-4z5Wap1Zg06EaiqKV-I-idxlYUA]loggerr@b...[/url
> Sent: Thursday, April 10, 2003 7:21 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] 82C54 on BS2e
>
>
>
>
> Does anybody know how to control 82C54 Programable
> Timer from Bs2e?
>
>
> Is possible to use BS2e I/O pins as 82C54 data bus
> and address bus?
>
>
> if Anybody have a sample code or documentation about
> this question,
> please send me.
>
>
>
>
> thank's
>
>
>
>
> Vanderson
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed.
> Text in the Subject and
> Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed.
> Text in the Subject and Body of the message will be
> ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
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I just started working on the 82C54 PIT and a BS2p24, but through a pair of
PCF8574 I2C I/O extenders (one for the data bus, and the other for the
remaining address and control lines, for I/O limitations), but actually I'm
just writing the program codes and didn't try any test.
If you have I/O enough for directly controlling the PIT, you can do it.
Anyway I suggest you to put a 74HC... buffer through the lines used for the
data bus, mainly for the safety of the Stamp (the PIT data bus is
bi-directional). Second, remember that when powered on the PIT has its
internal registers in an unknown condition (it isn't provided by a reset
pin), therefore you have to set them anyway.
I'm following only the data sheet of the PIT, that seems something plain to
me. If you tell me what application you are working around (that is, what
operating modes of the internal counters do interest you), maybe I can be of
any help for you.
I.e., I'm using the PIT in two PWM controller boards, one for AC and one for
DC motor, and that requires two counters - with different modes - in each
board.
Alberto, IZ2EWV.
Original Message
From: "kloggerr" <loggerr@b...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, April 11, 2003 4:20 AM
Subject: [noparse][[/noparse]basicstamps] 82C54 on BS2e
> Does anybody know how to control 82C54 Programable Timer from Bs2e?
>
> Is possible to use BS2e I/O pins as 82C54 data bus and address bus?
>
> if Anybody have a sample code or documentation about this question,
> please send me.
>
> thank's
>
> Vanderson
mode 2 and counter 1/2 on mode 1 to control a 50 Hz PWM motor.
Now, I am using almost all I/O pins from my BS2e for 82C54 control.
It's very bad, I'll need more I/O or another Bs2e !!
I would like to use a any IC for expand Bs2e I/O pins.Do you know
anything to make that?
Vanderson
--- In basicstamps@yahoogroups.com, "Alberto Calderara"
<albertocalderara@t...> wrote:
> Ciao,
>
> I just started working on the 82C54 PIT and a BS2p24, but through a
pair of
> PCF8574 I2C I/O extenders (one for the data bus, and the other for
the
> remaining address and control lines, for I/O limitations), but
actually I'm
> just writing the program codes and didn't try any test.
>
> If you have I/O enough for directly controlling the PIT, you can do
it.
> Anyway I suggest you to put a 74HC... buffer through the lines used
for the
> data bus, mainly for the safety of the Stamp (the PIT data bus is
> bi-directional). Second, remember that when powered on the PIT has
its
> internal registers in an unknown condition (it isn't provided by a
reset
> pin), therefore you have to set them anyway.
>
> I'm following only the data sheet of the PIT, that seems something
plain to
> me. If you tell me what application you are working around (that is,
what
> operating modes of the internal counters do interest you), maybe I
can be of
> any help for you.
>
> I.e., I'm using the PIT in two PWM controller boards, one for AC and
one for
> DC motor, and that requires two counters - with different modes - in
each
> board.
>
> Alberto, IZ2EWV.
>
>
Original Message
> From: "kloggerr" <loggerr@b...>
> To: <basicstamps@yahoogroups.com>
> Sent: Friday, April 11, 2003 4:20 AM
> Subject: [noparse][[/noparse]basicstamps] 82C54 on BS2e
>
>
> > Does anybody know how to control 82C54 Programable Timer from
Bs2e?
> >
> > Is possible to use BS2e I/O pins as 82C54 data bus and address
bus?
> >
> > if Anybody have a sample code or documentation about this
question,
> > please send me.
> >
> > thank's
> >
> > Vanderson
to Parallel set of signals?
(Use SHIFTOUT to control)
(AND you can put multiples in series!)
74HC165 for Parallel in to Serial set of signals?
(Again, use SHIFTIN )
--- In basicstamps@yahoogroups.com, "kloggerr" <loggerr@b...> wrote:
> My project require only one 82C54 PIT on basic PWM arrange,counter0
on
> mode 2 and counter 1/2 on mode 1 to control a 50 Hz PWM motor.
>
>
> Now, I am using almost all I/O pins from my BS2e for 82C54 control.
> It's very bad, I'll need more I/O or another Bs2e !!
>
>
> I would like to use a any IC for expand Bs2e I/O pins.Do you know
> anything to make that?
>
>
>
>
>
>
> Vanderson
>
>
>
>
>
>
> --- In basicstamps@yahoogroups.com, "Alberto Calderara"
> <albertocalderara@t...> wrote:
>
>
> > Ciao,
>
>
> >
>
>
> > I just started working on the 82C54 PIT and a BS2p24, but through
a
> pair of
>
>
> > PCF8574 I2C I/O extenders (one for the data bus, and the other
for
> the
>
>
> > remaining address and control lines, for I/O limitations), but
> actually I'm
>
>
> > just writing the program codes and didn't try any test.
>
>
> >
>
>
> > If you have I/O enough for directly controlling the PIT, you can
do
> it.
>
>
> > Anyway I suggest you to put a 74HC... buffer through the lines
used
> for the
>
>
> > data bus, mainly for the safety of the Stamp (the PIT data bus is
>
>
> > bi-directional). Second, remember that when powered on the PIT
has
> its
>
>
> > internal registers in an unknown condition (it isn't provided by
a
> reset
>
>
> > pin), therefore you have to set them anyway.
>
>
> >
>
>
> > I'm following only the data sheet of the PIT, that seems
something
> plain to
>
>
> > me. If you tell me what application you are working around (that
is,
> what
>
>
> > operating modes of the internal counters do interest you), maybe
I
> can be of
>
>
> > any help for you.
>
>
> >
>
>
> > I.e., I'm using the PIT in two PWM controller boards, one for AC
and
> one for
>
>
> > DC motor, and that requires two counters - with different modes -
in
> each
>
>
> > board.
>
>
> >
>
>
> > Alberto, IZ2EWV.
>
>
> >
>
>
> >
Original Message
>
>
> > From: "kloggerr" <loggerr@b...>
>
>
> > To: <basicstamps@yahoogroups.com>
>
>
> > Sent: Friday, April 11, 2003 4:20 AM
>
>
> > Subject: [noparse][[/noparse]basicstamps] 82C54 on BS2e
>
>
> >
>
>
> >
>
>
> > > Does anybody know how to control 82C54 Programable Timer from
> Bs2e?
>
>
> > >
>
>
> > > Is possible to use BS2e I/O pins as 82C54 data bus and address
> bus?
>
>
> > >
>
>
> > > if Anybody have a sample code or documentation about this
> question,
>
>
> > > please send me.
>
>
> > >
>
>
> > > thank's
>
>
> > >
>
>
> > > Vanderson