i am looking for a 5 volt signal
I'm looking for a 5 volt signal.
I have wires plugged into pins 2 and 25 of the parallel port.
I have written a small program:
#include
#include
#include
int main()
{
int fd;
while(1)
{
ioctl(fd, PPISDATA, 255);
}
}
and have it executing...
I have a multi-meter with the positive lead touching the pin 2 wire and the negative
lead touching pin 25 wire, but i am not registering any voltage.
=(
I am sad.
I have recompiled my kernel to disable plip and enable ppi. The following is a snipet
of my kernel configuration:
# Parallel port
device ppc0at isa? irq 7
device ppbus # Parallel port bus (required)
device lpt # Printer
#
# 2002 oct 27 - removed plip and added ppi.
#
#device plip# TCP/IP over parallel
device ppi # Parallel port interface device
#device vpo # Requires scbus and da
any help would be very much appreciated
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Re: i am looking for a 5 volt signal
Shouldn't the fact that the signal is in a while loop keep the 5 volt
signal going? Isn't the parallel port being blasted with the
value 255 over and over again?
The serial port will not fulfill what i am ultimately trying to achive. I
am trying to have the parallel port to control 8 relays each turing
on/off based upon which bit i send out to the port.
On Sun, 27 Oct 2002 [EMAIL PROTECTED] wrote:
> try using also the serial port and a logical buffer
>
> the 5 volt signal is very fast and your multimeter is maybe not to fast
>
> > I'm looking for a 5 volt signal.
> >
> > I have wires plugged into pins 2 and 25 of the parallel port.
> >
> > I have written a small program:
> >
> > #include
> > #include
> > #include
> >
> > int main()
> > {
> > int fd;
> > while(1)
> > {
> > ioctl(fd, PPISDATA, 255);
> > }
> > }
> >
> > and have it executing...
> >
> > I have a multi-meter with the positive lead touching the pin 2 wire and
> > the negative lead touching pin 25 wire, but i am not registering any
> > voltage.
> >
> > =(
> >
> > I am sad.
> >
> > I have recompiled my kernel to disable plip and enable ppi. The
> > following is a snipet of my kernel configuration:
> >
> > # Parallel port
> > device ppc0at isa? irq 7
> > device ppbus # Parallel port bus (required)
> > device lpt # Printer
> > #
> > # 2002 oct 27 - removed plip and added ppi.
> > #
> > #device plip# TCP/IP over parallel
> > device ppi # Parallel port interface device
> > #device vpo # Requires scbus and da
> >
> > any help would be very much appreciated
> >
> >
> > To Unsubscribe: send mail to [EMAIL PROTECTED]
> > with "unsubscribe freebsd-hackers" in the body of the message
>
>
>
> -
> "UNIXMEXICO la comunidad *nix en todo México!"
> http://www.unixmexico.org/
>
>
>
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Re: i am looking for a 5 volt signal
I'm having problems just using 1 bit fromt he parallel port at this time.
On Sun, 27 Oct 2002 [EMAIL PROTECTED] wrote:
> the parallel port then is ok
> now you can use a logical multiplexer
>
> and from the paralel port you can use just 3 bits
>
> take a look to the data sheets ot this multiplexer
>
> http://www.cs.utah.edu/classes/cs3700/handouts/pdf/MM74C150.pdf
>
> the input of the multiplexer will be
>
> 000
> 001
> 010
> 011
> 100
> 101
> 110
> 111
>
> and at the ouput you will have a leched 1 or 0 ( 5volts or 0 volts) the
> ones you can aply to your relays
>
>
> > Shouldn't the fact that the signal is in a while loop keep the 5 volt
> > signal going? Isn't the parallel port being blasted with the
> > value 255 over and over again?
> >
> > The serial port will not fulfill what i am ultimately trying to achive.
> > I am trying to have the parallel port to control 8 relays each turing
> > on/off based upon which bit i send out to the port.
> >
> > On Sun, 27 Oct 2002 [EMAIL PROTECTED] wrote:
> >
> >> try using also the serial port and a logical buffer
> >>
> >> the 5 volt signal is very fast and your multimeter is maybe not to
> >> fast
> >>
> >> > I'm looking for a 5 volt signal.
> >> >
> >> > I have wires plugged into pins 2 and 25 of the parallel port.
> >> >
> >> > I have written a small program:
> >> >
> >> > #include
> >> > #include
> >> > #include
> >> >
> >> > int main()
> >> > {
> >> > int fd;
> >> > while(1)
> >> > {
> >> > ioctl(fd, PPISDATA, 255);
> >> > }
> >> > }
> >> >
> >> > and have it executing...
> >> >
> >> > I have a multi-meter with the positive lead touching the pin 2 wire
> >> and the negative lead touching pin 25 wire, but i am not registering
> >> any voltage.
> >> >
> >> > =(
> >> >
> >> > I am sad.
> >> >
> >> > I have recompiled my kernel to disable plip and enable ppi. The
> >> following is a snipet of my kernel configuration:
> >> >
> >> > # Parallel port
> >> > device ppc0at isa? irq 7
> >> > device ppbus # Parallel port bus (required)
> >> > device lpt # Printer
> >> > #
> >> > # 2002 oct 27 - removed plip and added ppi.
> >> > #
> >> > #device plip# TCP/IP over parallel
> >> > device ppi # Parallel port interface device
> >> > #device vpo # Requires scbus and da
> >> >
> >> > any help would be very much appreciated
> >> >
> >> >
> >> > To Unsubscribe: send mail to [EMAIL PROTECTED]
> >> > with "unsubscribe freebsd-hackers" in the body of the message
> >>
> >>
> >>
> >> -
> >> "UNIXMEXICO la comunidad *nix en todo México!"
> >> http://www.unixmexico.org/
> >>
> >>
> >>
> >
> >
> > To Unsubscribe: send mail to [EMAIL PROTECTED]
> > with "unsubscribe freebsd-hackers" in the body of the message
>
>
>
> -
> "UNIXMEXICO la comunidad *nix en todo México!"
> http://www.unixmexico.org/
>
>
>
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Re: i am looking for a 5 volt signal
: :Shouldn't the fact that the signal is in a while loop keep the 5 volt :signal going? Isn't the parallel port being blasted with the :value 255 over and over again? : :The serial port will not fulfill what i am ultimately trying to achive. I :am trying to have the parallel port to control 8 relays each turing :on/off based upon which bit i send out to the port. : :.. :> try using also the serial port and a logical buffer :> :> the 5 volt signal is very fast and your multimeter is maybe not to fast :> :> > I'm looking for a 5 volt signal. Uh guys. Parallel port digital outputs do not generally have a whole lot of drive. I really doubt a parallel port output could drive a relay. And it's probably TTL level equivalents, not CMOS. Even if you ganged the output bits together I doubt you would get enough drive out of them. A serial port output (+/-12 but you may see +/-10 or -5 and +12 or other out-of-spec combinations) is far more likely to be useful in driving a relay, though again there will not be much drive. It would be far better to supply the power you need from another source, like a +5V power supply. Or just get a wallwart with DC output and run it through a linear regulator. At least then you aren't likely to burn the house down :-) -Matt To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: i am looking for a 5 volt signal
Matthew Dillon wrote: > Uh guys. Parallel port digital outputs do not generally have a whole > lot of drive. I really doubt a parallel port output could drive a > relay. Depends on the amperage the relay draws. 8-). I used to use the paralell port output to drive a pulse dialer and "off hook" for a modem that didn't have the capability itself (a 300 baud accoustic couple modem). One of the reasons I laugh when I see the "war dialer" scene in War Games. That said, you damn well better not draw any real current from the parallel port, if you want to avoid cooking it. In other words, do *not* use it to power something external, and if you are using it for a 1/0 signal to something that wangts to switch a lot of volts and amps from a real power supply, consider using an SCR, instead. > > And it's probably TTL level equivalents, not CMOS. Even if you ganged > the output bits together I doubt you would get enough drive out of > them. > > A serial port output (+/-12 but you may see +/-10 or -5 and +12 or other > out-of-spec combinations) is far more likely to be useful in driving > a relay, though again there will not be much drive. It would be far > better to supply the power you need from another source, like a +5V > power supply. Or just get a wallwart with DC output and run it through > a linear regulator. At least then you aren't likely to burn the house > down :-) Get a brick and use an SCR to switch the brick. -- Terry To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: i am looking for a 5 volt signal
On Sun, Oct 27, 2002 at 11:19:15AM -0800, Matthew Dillon wrote: > > : > :Shouldn't the fact that the signal is in a while loop keep the 5 volt > :signal going? Isn't the parallel port being blasted with the > :value 255 over and over again? > : > :The serial port will not fulfill what i am ultimately trying to achive. I > :am trying to have the parallel port to control 8 relays each turing > :on/off based upon which bit i send out to the port. > : > :.. > :> try using also the serial port and a logical buffer > :> > :> the 5 volt signal is very fast and your multimeter is maybe not to fast > :> > :> > I'm looking for a 5 volt signal. > > Uh guys. Parallel port digital outputs do not generally have a whole > lot of drive. I really doubt a parallel port output could drive a > relay. Get a solid state relay. Parallel ports used to be build with TTL chips, but these days drive power is probably much less. > And it's probably TTL level equivalents, not CMOS. Even if you ganged > the output bits together I doubt you would get enough drive out of > them. Yup. -- | / o / /_ _ [EMAIL PROTECTED] |/|/ / / /( (_) Bulte Arnhem, the Netherlands To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: i am looking for a 5 volt signal
On Sun, 27 Oct 2002 11:19:15 -0800 (PST) Matthew Dillon <[EMAIL PROTECTED]> wrote: > > : > :Shouldn't the fact that the signal is in a while loop keep the 5 volt > :signal going? Isn't the parallel port being blasted with the > :value 255 over and over again? > : > :The serial port will not fulfill what i am ultimately trying to achive. I > :am trying to have the parallel port to control 8 relays each turing > :on/off based upon which bit i send out to the port. > : > :.. > :> try using also the serial port and a logical buffer > :> > :> the 5 volt signal is very fast and your multimeter is maybe not to fast > :> > :> > I'm looking for a 5 volt signal. > > Uh guys. Parallel port digital outputs do not generally have a whole > lot of drive. I really doubt a parallel port output could drive a > relay. > > And it's probably TTL level equivalents, not CMOS. Even if you ganged > the output bits together I doubt you would get enough drive out of > them. > > A serial port output (+/-12 but you may see +/-10 or -5 and +12 or other > out-of-spec combinations) is far more likely to be useful in driving > a relay, though again there will not be much drive. It would be far > better to supply the power you need from another source, like a +5V > power supply. Or just get a wallwart with DC output and run it through > a linear regulator. At least then you aren't likely to burn the house > down :-) > > -Matt > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-hackers" in the body of the message > Two things here... One, most multimeters do not have the senistivity to monitor a pulse like this, they will just see 0 volts. You really need a scope or a probe to see this. Second, you'll can't drive an analog relay off of Pport without a latch or something. A transistor setup would work just fine. Check out http://www.circuitcellar.com/ for stuff that would work... GB -- GB Clark II | Roaming FreeBSD Admin [EMAIL PROTECTED] | General Geek CTHULU for President - Why choose the lesser of two evils? To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: i am looking for a 5 volt signal
: :Matthew Dillon wrote: :> Uh guys. Parallel port digital outputs do not generally have a whole :> lot of drive. I really doubt a parallel port output could drive a :> relay. : :Depends on the amperage the relay draws. 8-). : :I used to use the paralell port output to drive a pulse dialer and :"off hook" for a modem that didn't have the capability itself (a :300 baud accoustic couple modem). One of the reasons I laugh when :I see the "war dialer" scene in War Games. : :That said, you damn well better not draw any real current from the :parallel port, if you want to avoid cooking it. In other words, do :*not* use it to power something external, and if you are using it :for a 1/0 signal to something that wangts to switch a lot of volts :and amps from a real power supply, consider using an SCR, instead. : :-- Terry Huh. I would have expected you to use the current loop on the phone line to power the dialer. There's a significant amount of power available there, though you would have to isolate the circuit since the common mode could be upwards of one or two hundred volts. In anycase, I can only concur on the danger of ganging the parallel power output bits. A single chip is driving those outputs and is almost certainly not rated to deal with a maximal current draw from all of them at once for long periods of time. It could fry. Though if it's a TTL output there isn't much current there anyway (TTL can sink a lot of current but it can't source it, the equivalent resistance to VCC is fairly high). Serial port pins are a much better bet. Serial port outputs can handle shorts far better then parallel port outputs and since the voltages are higher you can draw a good chunk of current out of them. Use diodes to rectify the serial port outputs (be sure to orient them properly, BAR side is positive. Flip the orientation for the negative supply). -o--o positive supply to circuit | (bar) | (around +10V) DIODE DIODE | | serial-pin serial-pin | | DIODE DIODE (OPTIONAL IF YOU NEED A NEGATIVE | (bar) | SUPPLY) -o--o negative supply to circuit (around -10V) Then: positive supply to circuit -[LINREG] +5V to circuit Use a 100uF (or more), a 10uF, and 0.1uF capacitor on the input side of the regulator and a 0.1uF capacitor on the output side of the regulator. The 0.1's should be as close to the linear regulator as possible. i.e.: ---supplyo-oo[LINREG]--o +5V supply | || 5V | CAP CAP CAPCAP | || | gnd gnd gndgnd 100 10 0.1 0.1 You can gang the serial outputs (by wire-dioding them together). The driver chips are far better able to handle that sort of thing, and since the output is +12V (well, usually +9 to +12) you can pull more current before it drops down to < 5V, so you can power 5V circuitry from it (up to a point). I expect you can get at least 20mA @ 5V out of ganged serial port outputs, possibly more. You could use an SCR but linear regulators are far, far better (a little 3-pin TO92 package linear regulator). And linear regulators have overcurrent protection as well (for themselves, not for whatever is powering them). It's fairly difficult to blow one up. -Matt Matthew Dillon <[EMAIL PROTECTED]> To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: i am looking for a 5 volt signal
Matthew Dillon wrote: > Huh. I would have expected you to use the current loop on the > phone line to power the dialer. There's a significant amount > of power available there, though you would have to isolate the > circuit since the common mode could be upwards of one or two > hundred volts. Telephone is 24 volts DC, which generally falls off to 18v at the customer permises. Ring is AC line voltage, to support mechanical ringers (e.g. 120v AC between ring, 24v DC between tip and ring). I worked as a lineman on private phone systems starting around age 14. 8-). > You could use an SCR but linear regulators are far, far better > (a little 3-pin TO92 package linear regulator). And linear regulators > have overcurrent protection as well (for themselves, not for whatever > is powering them). It's fairly difficult to blow one up. My SCR suggestion was based on the idea that you wanted to switch lots of volts/amps using Vcc chip levels to do it. THere are actually two threads here now: doing that, and lighting up a small number of LEDs (mention hardware projects, and the EE hobbiest wannabes come out of teh woodwork to ask for circuits... 8-)). Here is a good beginning parallel port project site: LED:http://www.free-hosting.lt/stech/lights/lights.htm Relay: http://www.armory.com/~rstevew/Public/Tutor/SolidStateRelaysDIY.txt Or a kit you can buy, with schematics: http://www.u-net.com/epr/electron/issue2/feat0302.htm Or more serious prebuilt stuff: http://www.lptek.com/io.htm And here is a wider selection, that has parallel port and serial port projects: http://ourworld.compuserve.com/homepages/Bill_Bowden/ ...and I'm disclaiming any responsibility, if you cook something with any of this... -- Terry To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: i am looking for a 5 volt signal
> In anycase, I can only concur on the danger of ganging the parallel > power output bits. A single chip is driving those outputs and is > almost certainly not rated to deal with a maximal current draw from > all of them at once for long periods of time. It could fry. The output signals don't go straight from the chip - do they? I've seen few KOhms resistors on most boards for each output pin. 27.10.2002; 19:32:00 [SorAlx] http://cydem.zp.ua/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: i am looking for a 5 volt signal
On Sun, Oct 27, 2002 at 09:12:33AM -0800, David Nicholas Kayal wrote:
> I'm looking for a 5 volt signal.
>
> I have wires plugged into pins 2 and 25 of the parallel port.
>
> I have written a small program:
>
> #include
> #include
> #include
>
> int main()
> {
> int fd;
> while(1)
> {
> ioctl(fd, PPISDATA, 255);
> }
> }
PPISDATA actually takes an int* argument. (The man page may be a tad
confusing here.)
Try
int main() {
int fd;
int d = 255;
fd = open( "/dev/ppi0", O_RDWR );
ioctl( fd, PPISDATA, &d );
return 0;
}
The port should hold the last value you send to it, there's no need
to continually refresh it.
--Joe
--
Joe Sunday <[EMAIL PROTECTED]> http://www.csh.rit.edu/~sunday/
Computer Science House, Rochester Inst. Of Technology
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Re: i am looking for a 5 volt signal
On Mon, Oct 28, 2002 at 08:56:35AM -0500, Joe Sunday wrote:
> On Sun, Oct 27, 2002 at 09:12:33AM -0800, David Nicholas Kayal wrote:
>
> > I'm looking for a 5 volt signal.
> >
> > I have wires plugged into pins 2 and 25 of the parallel port.
> >
> > I have written a small program:
> >
> > #include
> > #include
> > #include
> >
> > int main()
> > {
> > int fd;
> > while(1)
> > {
> > ioctl(fd, PPISDATA, 255);
> > }
> > }
>
> PPISDATA actually takes an int* argument. (The man page may be a tad
> confusing here.)
No it takes an u_int8_t* exactly as written in the manpage.
Using an int doesn't work in all cases.
I have no idea what part of the manpage is confusing.
> Try
> int main() {
> int fd;
> int d = 255;
u_int8_t d = 255;
> fd = open( "/dev/ppi0", O_RDWR );
>
> ioctl( fd, PPISDATA, &d );
>
> return 0;
> }
--
B.Walter COSMO-Project http://www.cosmo-project.de
[EMAIL PROTECTED] Usergroup [EMAIL PROTECTED]
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Re: i am looking for a 5 volt signal
On Tue, Oct 29, 2002 at 05:08:45PM +0100, Bernd Walter wrote:
> On Mon, Oct 28, 2002 at 08:56:35AM -0500, Joe Sunday wrote:
> > On Sun, Oct 27, 2002 at 09:12:33AM -0800, David Nicholas Kayal wrote:
> >
> > > I'm looking for a 5 volt signal.
> > >
> > > I have wires plugged into pins 2 and 25 of the parallel port.
> > >
> > > I have written a small program:
> > >
> > > #include
> > > #include
> > > #include
> > >
> > > int main()
> > > {
> > > int fd;
> > > while(1)
> > > {
> > > ioctl(fd, PPISDATA, 255);
> > > }
> > > }
> >
> > PPISDATA actually takes an int* argument. (The man page may be a tad
> > confusing here.)
>
> No it takes an u_int8_t* exactly as written in the manpage.
> Using an int doesn't work in all cases.
> I have no idea what part of the manpage is confusing.
>
> > Try
> > int main() {
> > int fd;
> > int d = 255;
> u_int8_t d = 255;
>
> > fd = open( "/dev/ppi0", O_RDWR );
> >
> > ioctl( fd, PPISDATA, &d );
> >
> > return 0;
> > }
My bad. Yeah, it takes a u_int8_t* argument, not an int* (Serves me right for
doing it off the top of my head instead of looking at my code). However,
the original poster had it simply taking some integer value rather than
a pointer.
The man page says this:
Each command takes a single u_int8_t argument, transferring one
byte of data.
Which, to me at first glance, can read as a u_int8_t argument, rather
than a u_int8_t* argument if you're new to using ioctls. The example
further down the man page has it properly taking an pointer.
--Joe
--
Joe Sunday <[EMAIL PROTECTED]> http://www.csh.rit.edu/~sunday/
Computer Science House, Rochester Inst. Of Technology
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Re: i am looking for a 5 volt signal
:The output signals don't go straight from the chip - do they? :I've seen few KOhms resistors on most boards for each output pin. : :27.10.2002; 19:32:00 :[SorAlx] http://cydem.zp.ua/ It depends on the chip. Most modern serial driver chips have series resistors on the outputs, inside the chip, and do not need any external current limiting (which is what the resistor does in effect). Parallel port chips typically do not have output resistors and instead depend on beefy TTL output stages, and a good motherboard manufacturer will put series resistors on those pins. All modern chips have diode protection on their outputs but you can still zap them (static shock it to death). Serial pins tend to be far, far more robust then parallel port pins due to having to go through level converters to get the right voltages on outputs and to be able to handle +/-12V on inputs. For example, most serial driver chips can handle up to +/-25V on their inputs before they blow up. Try putting even +12V on a parallel port pin and you will likely fry the chip, even with an external series resistor, and an external series resistor alone will not stop a big static shock, only a Zener diode is fast enough to do that. An external series resistor is there strictly for current limiting purposes. -Matt Matthew Dillon <[EMAIL PROTECTED]> To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: i am looking for a 5 volt signal
> :The output signals don't go straight from the chip - do they? > :I've seen few KOhms resistors on most boards for each output pin. > An external series resistor is there strictly for current > limiting purposes. Yep, that's why I asked if manufacturers usually put external resistors. I tried to short all the wires together and on the ground :) from an old ISA paraller port controller card - it didn't blow up. So the message to the author of this thread: check for resistors on your mboard, if it's the old one, in series with the outputs, so that you can be sure that you won't kill the controller during experiments... 28.10.2002; 18:05:15 [SorAlx] http://cydem.zp.ua/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: i am looking for a 5 volt signal
On Sun, 27-Oct-2002 at 09:12:33 -0800, David Nicholas Kayal wrote:
> I'm looking for a 5 volt signal.
>
> I have wires plugged into pins 2 and 25 of the parallel port.
>
> I have written a small program:
>
> #include
> #include
> #include
>
> int main()
> {
> int fd;
> while(1)
> {
> ioctl(fd, PPISDATA, 255);
> }
> }
>
I had at least one machine where I had to drive the STROBE signal
to actually get the data appear on the bus. The program attached
below did the trick. It does a little bit more so here is a quick
explanation:
I wanted to physically push the RESET button of another machine
(running Windoze, btw. :-)). To make things a bit more robust
I used all 8 lines of data which are attached to a HC 688 (iirc)
whose second 8 bit input is hardwired to the value 0x5A. Its
output drives an optocoupler whose output is connected to the
RESET connector of the Windoze box. The power was supplied by
all output capable lines of the parallel port (8 data, strobe,
some control lines) which are all connected via diodes and a
resistor to a capacitor. The program first drives the 8 databits
high to charge the capacitor for 5 seconds. It then puts the
0x5A word on the wire for one second. This is when the HC 688's
output goes high and drives the optocoupler to reset the windoze
box.
If you look at the program you'll find that every dataoutput
is surrounded by the apprpropriate STROBE action.
Hth,
-Andre
#include
#include
#include
#include
#include
#include
#include
int Fd;
void send( u_int8_t byte )
{
u_int8_t myc, tmp;
printf( "Sending %02X\n", byte );
if( ioctl( Fd, PPIGCTRL, &myc ) == -1 ) // save old control
err( EX_IOERR, "save control" );
myc &= ~STROBE & ~PCD;// strobe high
tmp = myc;
if( ioctl( Fd, PPISCTRL, &tmp )== -1 )
err( EX_IOERR, "set control" );
if( ioctl( Fd, PPISDATA, &byte ) == 1 ) // set my code
err( EX_IOERR, "set data" );
tmp = myc | STROBE; // strobe low
if( ioctl( Fd, PPISCTRL, &tmp )== -1 )
err( EX_IOERR, "set control" );
tmp = myc;
if( ioctl( Fd, PPISCTRL, &tmp )== -1 )// strobe high
err( EX_IOERR, "set control" );
}
int main( int argc, const char* argv[] )
{
if( (Fd = open( "/dev/ppi0", O_RDWR)) <= 0 )
err( EX_IOERR, "open /dev/ppi0" );
send( 0xFF ); // charge C
sleep( 5 );
send( 0x5A ); // send code
sleep( 1 );
send( 0xFF ); // disable code
return( 0 );
}
