H
hybrid_snyper
Guest
Thank you very much for that, I will plod on with that and see what i
can come up with. If i have any problems i will let you know.
can come up with. If i have any problems i will let you know.
C
Charles Schuler
Guest
"koko" <joanneo0322@gmail.com> wrote in message
news:1163406208.449940.267000@m73g2000cwd.googlegroups.com...
news:1163406208.449940.267000@m73g2000cwd.googlegroups.com...
No, and it so far off topic that it is _____________.
C
Charles Schuler
Guest
Go away, Koko.
J
JeffM
Guest
javithkhan@ gmail.com wrote:
http://www.google.com/search?q=define:bluetooth
If it is something you want defined:
http://www.google.com/search?q=define:bluetooth
C
Costas Vlachos
Guest
Tim Auton wrote:
won't work. For a PC <--> PIC connection you don't really need level
shifting but you must invert the signals. I don't know how the T28
serial works. If it's non-standard, the above might work, but I suspect
inversion will be necessary. Two transistors should do the trick.
--
Regards,
Costas
_________________________________________________
Costas Vlachos Email: c-X-vlachos@hot-X-mail.com
SPAM-TRAPPED: Please remove "-X-" before replying
I think the signals may need to be inverted, in which case the above
won't work. For a PC <--> PIC connection you don't really need level
shifting but you must invert the signals. I don't know how the T28
serial works. If it's non-standard, the above might work, but I suspect
inversion will be necessary. Two transistors should do the trick.
--
Regards,
Costas
_________________________________________________
Costas Vlachos Email: c-X-vlachos@hot-X-mail.com
SPAM-TRAPPED: Please remove "-X-" before replying
P
petrus bitbyter
Guest
"Tim Auton" <tim.auton@uton.borg.invalid> schreef in bericht
news:7o9n24-9up.ln1@bertha.auton.me.uk...
Hmmm. I carefully reread the original question. The OP tells he knows how to
connect the COM port of its PC to the phone. If he did so and the phone has
3.3V or 5V logic inputs, it's blown by now. So I concluded the phone to have
an RS232 interface. I agree, it's not very likely the phone to have this
build in, but you can buy interface cables. The ones I'm aware of have a
MAX3232 or similar in their connector. So you are right, it will end up
converting two times. 5V <--> RS232 <--> 3V3. Which will be the most safe
way for someone asking questions like this.
petrus bitbyter
news:7o9n24-9up.ln1@bertha.auton.me.uk...
Hmmm. I carefully reread the original question. The OP tells he knows how to
connect the COM port of its PC to the phone. If he did so and the phone has
3.3V or 5V logic inputs, it's blown by now. So I concluded the phone to have
an RS232 interface. I agree, it's not very likely the phone to have this
build in, but you can buy interface cables. The ones I'm aware of have a
MAX3232 or similar in their connector. So you are right, it will end up
converting two times. 5V <--> RS232 <--> 3V3. Which will be the most safe
way for someone asking questions like this.
petrus bitbyter
T
Tim Auton
Guest
Costas Vlachos <c-X-vlachos@hot-x-mail.com> wrote:
things. I would be very surprised if the T28 had on-board circuitry to
generate RS232 levels - ie something like a MAX232 on board. Mobile
phones are too cost, size and power sensetive for that. So I expect on
the connector on the bottom of the phone there is a standard
(non-inverted) logic-level UART connection, which you could connect to a
PIC directly. However, if there is a cable with a DB9 plug on the end to
connect to a PC serial port (ie RS232) I would expect that to provide
RS232 levels, with the conversion provided by something like a MAX232 or
DS276 (like a MAX232 but steals power from the signal lines) inside the
cable. I was talking about the phone end of that cable, you seem to be
talking about the PC end.
So, if the OP has a cable with a DB9 plug designed to plug into a PC and
wants to connect it to their PIC they would need a MAX232. I was
assuming they just had a connector, so wouldn't need one (or an inverter).
Tim
Thinking about this more I think we might be talking about different
things. I would be very surprised if the T28 had on-board circuitry to
generate RS232 levels - ie something like a MAX232 on board. Mobile
phones are too cost, size and power sensetive for that. So I expect on
the connector on the bottom of the phone there is a standard
(non-inverted) logic-level UART connection, which you could connect to a
PIC directly. However, if there is a cable with a DB9 plug on the end to
connect to a PC serial port (ie RS232) I would expect that to provide
RS232 levels, with the conversion provided by something like a MAX232 or
DS276 (like a MAX232 but steals power from the signal lines) inside the
cable. I was talking about the phone end of that cable, you seem to be
talking about the PC end.
So, if the OP has a cable with a DB9 plug designed to plug into a PC and
wants to connect it to their PIC they would need a MAX232. I was
assuming they just had a connector, so wouldn't need one (or an inverter).
Tim
C
Costas Vlachos
Guest
Tim Auton wrote:
phone cable, then he should be able to do it like you said in your first
post (direct connection, resistors for protection). It makes sense for
the phone manufacturer to move the MAX232 or similar IC outside of the
phone for size/cost issues. The OP can connect directly like you said
and see what happens. If it doesn't work, invert the signals and try
again. I don't think level shifting will be necessary for such a small
device anyway (it definitely isn't for modern PCs). I was just assuming
that the Tx/Rx signals from the phone would match the standard polarity
of the RS-232 in which case inversion would be necessary. I suppose he
could measure the phone's Tx line when idle to determine whether
inversion is needed.
--
Regards,
Costas
_________________________________________________
Costas Vlachos Email: c-X-vlachos@hot-X-mail.com
SPAM-TRAPPED: Please remove "-X-" before replying
I see what you mean. If the inversion/level-shifting is done in the
phone cable, then he should be able to do it like you said in your first
post (direct connection, resistors for protection). It makes sense for
the phone manufacturer to move the MAX232 or similar IC outside of the
phone for size/cost issues. The OP can connect directly like you said
and see what happens. If it doesn't work, invert the signals and try
again. I don't think level shifting will be necessary for such a small
device anyway (it definitely isn't for modern PCs). I was just assuming
that the Tx/Rx signals from the phone would match the standard polarity
of the RS-232 in which case inversion would be necessary. I suppose he
could measure the phone's Tx line when idle to determine whether
inversion is needed.
--
Regards,
Costas
_________________________________________________
Costas Vlachos Email: c-X-vlachos@hot-X-mail.com
SPAM-TRAPPED: Please remove "-X-" before replying
R
Roger
Guest
joanneo0322@hotmail.com wrote:
calories in SPAM anyway?
I can barely imagine how small a study it actually was. How many
calories in SPAM anyway?
P
Puckdropper
Guest
"Roger" <roger.howell3@gmail.com> wrote in news:1163506835.417581.36490
@h54g2000cwb.googlegroups.com:
Puckdroppe
--
Wise is the man who attempts to answer his question before asking it.
To email me directly, send a message to puckdropper (at) fastmail.fm
@h54g2000cwb.googlegroups.com:
Only a few, that's why there's so much.
Puckdroppe
--
Wise is the man who attempts to answer his question before asking it.
To email me directly, send a message to puckdropper (at) fastmail.fm
H
hybrid_snyper
Guest
Costas Vlachos wrote:
So direct connection is the way to go. I found these two links a while
back. The first is what I believe to be the circuitry within the
datacable and to which would allow me to eliminate the cable.
http://pinouts.ru/CellularPhonesCables/ericsson_cable_pinout.shtml
this next link shows a guy which has a Tiny12 connected directly via a
datacable to his MCU. I take it would be a similar setup to this. He
has the data entering the MCU fed direct with a 4700 resistor in
between. However he has added circuitry to create a true bi-polar
signal. Im not sure what this means.
http://www.riccibitti.com/tinyplanet/tiny_article.htm
So direct connection is the way to go. I found these two links a while
back. The first is what I believe to be the circuitry within the
datacable and to which would allow me to eliminate the cable.
http://pinouts.ru/CellularPhonesCables/ericsson_cable_pinout.shtml
this next link shows a guy which has a Tiny12 connected directly via a
datacable to his MCU. I take it would be a similar setup to this. He
has the data entering the MCU fed direct with a 4700 resistor in
between. However he has added circuitry to create a true bi-polar
signal. Im not sure what this means.
http://www.riccibitti.com/tinyplanet/tiny_article.htm
J
John Larkin
Guest
On Mon, 13 Nov 2006 18:18:12 -0500, "Charles Schuler"
<charleschuler@comcast.net> wrote:
And most of the organic stuff tastes horrible.
John
<charleschuler@comcast.net> wrote:
Chocolate is an essential component of professional electronic design.
And most of the organic stuff tastes horrible.
John
C
Costas Vlachos
Guest
hybrid_snyper wrote:
link it's clear that there's no need to invert the signals when you
connect the phone *directly* to the PIC (i.e., *without* using the
special Ericsson cable which has circuitry inside). If you do it like
this you should be fine using only resistors for protection (as Tim
Auton suggested earlier):
Phone Tx -----\/\/\----- PIC Rx
Phone Rx -----\/\/\----- PIC Tx
Phone GND --------------- PIC GND
I don't know about the voltage levels of the T28. Are they 5V or 3.3V?
Probably the latter. As Tim said, run the PIC at the same voltage. I
don't think you need to worry about true bipolar signals, the other guy
in the second link probably uses the proper Ericsson cable (with the
circuit inside) and so has to deal with negative voltages (hence the
Zener), and uses the transistor to "steal" negative voltage from the
incoming signal to generate his own bipolar Tx signal. The transistor
also inverts the MCU's Tx signal. He probably does the inversion of the
Rx signal in s/w (inside the MCU - no h/w UART used).
So, to recap, if you're somehow connecting the phone directly to the PIC
(no cable) or you're using just a passive connector or a dummy cable (no
circuitry involved) then use the above wiring (PIC's voltage same as
phone's logic levels, 5V or 3.3V). If you *are* using the proper
Ericsson cable (with the level shifter/inverter inside), then you need
to invert the signals again so that the PIC & phone can talk to each
other. Hope this is now clearer.
--
Regards,
Costas
_________________________________________________
Costas Vlachos Email: c-X-vlachos@hot-X-mail.com
SPAM-TRAPPED: Please remove "-X-" before replying
OK, these are nice links relating to what you want to do. From the first
link it's clear that there's no need to invert the signals when you
connect the phone *directly* to the PIC (i.e., *without* using the
special Ericsson cable which has circuitry inside). If you do it like
this you should be fine using only resistors for protection (as Tim
Auton suggested earlier):
Phone Tx -----\/\/\----- PIC Rx
Phone Rx -----\/\/\----- PIC Tx
Phone GND --------------- PIC GND
I don't know about the voltage levels of the T28. Are they 5V or 3.3V?
Probably the latter. As Tim said, run the PIC at the same voltage. I
don't think you need to worry about true bipolar signals, the other guy
in the second link probably uses the proper Ericsson cable (with the
circuit inside) and so has to deal with negative voltages (hence the
Zener), and uses the transistor to "steal" negative voltage from the
incoming signal to generate his own bipolar Tx signal. The transistor
also inverts the MCU's Tx signal. He probably does the inversion of the
Rx signal in s/w (inside the MCU - no h/w UART used).
So, to recap, if you're somehow connecting the phone directly to the PIC
(no cable) or you're using just a passive connector or a dummy cable (no
circuitry involved) then use the above wiring (PIC's voltage same as
phone's logic levels, 5V or 3.3V). If you *are* using the proper
Ericsson cable (with the level shifter/inverter inside), then you need
to invert the signals again so that the PIC & phone can talk to each
other. Hope this is now clearer.
--
Regards,
Costas
_________________________________________________
Costas Vlachos Email: c-X-vlachos@hot-X-mail.com
SPAM-TRAPPED: Please remove "-X-" before replying
B
Bob Myers
Guest
"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in message
news:rkqjl2dcefctgp8m7pqtknmipj8akkdb7n@4ax.com...
put such things as McDonald's chocolate shakes into the
"probably inorganic" category....;-)
Bob M.
news:rkqjl2dcefctgp8m7pqtknmipj8akkdb7n@4ax.com...
I'm pretty sure it's all organic, John. Although I would
put such things as McDonald's chocolate shakes into the
"probably inorganic" category....;-)
Bob M.
M
Michael A. Terrell
Guest
Roger wrote:
Regular SPAM is 1044 calories per can, 822 calories from fat.
SPAM Lite is 660 calories per can, 420 calories from fat.
SPAM Turkey is 480 calories per can, 210 calories from fat.
The Armour version is 1080 calories per can, 840 calories from fat.
Serving size is 1/6 of a SPAM. ;-)
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
Regular SPAM is 1044 calories per can, 822 calories from fat.
SPAM Lite is 660 calories per can, 420 calories from fat.
SPAM Turkey is 480 calories per can, 210 calories from fat.
The Armour version is 1080 calories per can, 840 calories from fat.
Serving size is 1/6 of a SPAM. ;-)
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
M
Michael A. Terrell
Guest
John Larkin wrote:
That's because its made from old drafting paper, used coffee grounds
and held together with used 10W30 motor oil.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
That's because its made from old drafting paper, used coffee grounds
and held together with used 10W30 motor oil.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
P
petrus bitbyter
Guest
"petrus bitbyter" <pieterkraltlaatditweg@enditookhccnet.nl> schreef in
bericht news:4557bdb1$0$26967$e4fe514c@dreader32.news.xs4all.nl...
Memory fails. The next code should be correct:
num1 equ 64
num2 equ 65
num3 equ 66
num4 equ 67
clr c
mov a,num1
rlc a
xrl num1,a
mov a,num2
rlc a
xrl num2,a
mov a,num3
rlc a
xrl num3,a
mov a,num4
rlc a
xrl num4,a
end
petrus bitbyter
bericht news:4557bdb1$0$26967$e4fe514c@dreader32.news.xs4all.nl...
Oops,
Memory fails. The next code should be correct:
num1 equ 64
num2 equ 65
num3 equ 66
num4 equ 67
clr c
mov a,num1
rlc a
xrl num1,a
mov a,num2
rlc a
xrl num2,a
mov a,num3
rlc a
xrl num3,a
mov a,num4
rlc a
xrl num4,a
end
petrus bitbyter
H
hybrid_snyper
Guest
If you *are* using the proper
so im going to be better off using some copper wire some resistors and
try and wire the phone pins to the PIC pins directly. I bought the data
cable on the assumption it would be the simpler option, connect the
data cable to a RS232 port wired to the PIC. But in this case it is
not, its def not the simpler way,
Thanks for that guys I appreciate it, i will be in touch with the
outcome
So to use the proper connector is going to require the max232 anyway,
so im going to be better off using some copper wire some resistors and
try and wire the phone pins to the PIC pins directly. I bought the data
cable on the assumption it would be the simpler option, connect the
data cable to a RS232 port wired to the PIC. But in this case it is
not, its def not the simpler way,
Thanks for that guys I appreciate it, i will be in touch with the
outcome
D
David L. Jones
Guest
John Larkin wrote:
this afternoon...
really beat that extra added and processed chemical taste. Organic
chocolate prices are insane though, I would rather have a 300g family
block of Cadbury which costs less than a 40g organic bar.
One organic bar you can get in Oz is associated with some save the
animal fund, so you can rid yourself of chemicals, save the polar bear
and feel good about yourself at the same time, so you don't notice
paying 10 times the regular price.
Dave
Agreed. Now where is my vending machine money, I have a design review
this afternoon...
Some of the organic stuff here in Oz is pretty good, but you can't
really beat that extra added and processed chemical taste. Organic
chocolate prices are insane though, I would rather have a 300g family
block of Cadbury which costs less than a 40g organic bar.
One organic bar you can get in Oz is associated with some save the
animal fund, so you can rid yourself of chemicals, save the polar bear
and feel good about yourself at the same time, so you don't notice
paying 10 times the regular price.
Dave
J
John Fields
Guest
On 14 Nov 2006 17:37:29 -0800, "David L. Jones" <altzone@gmail.com>
wrote:
I like Cadbury and Nestlés Perugina well enough for sophistication,
smoothness, and all of that, but when push comes to shove and I
just want some kick-ass chocolate, Hershey's Special Dark Chocolate
does it for me.
--
JF
wrote:
---
I like Cadbury and Nestlés Perugina well enough for sophistication,
smoothness, and all of that, but when push comes to shove and I
just want some kick-ass chocolate, Hershey's Special Dark Chocolate
does it for me.
--
JF