On Mon, 23 Jul 2007 16:58:31 +1000, Clifford Heath
wrote:

Joerg wrote:
Or get a 16-bitter like the MSP430 with a HW multiplier. That ought to
do it.

The MSP430 has slow pin-toggle instructions, which bit me when trying
to do high-speed One-wire(tm) interface. Four cycles of a clock for
each half-cycle on the output :-(. Had to raise the internal clock
speed (a lot).

Clifford Heath.

You can do stuff like this: pre-load registers with patterns and then
just slam them into the ports. See the last part of this 68K code...



.SBTTL . UPOKE : PROGRAM AN FPGA

; THIS IS ACTUALLY THE CODE PROTOTYPE; THE REAL ROUTINE IS
; CACHED AND EXECUTED IN CPU RAM.

; THIS VERSION UNPACKS RLL:0 CONFIGS FURNISHED BY THE BRICK /RLL SWITCH

; SINCE IRQ'S AREN'T RUNNING YET, WE OWN PORT E.

; CALL THIS WITH A0 POINTING TO XILINX CONFIG DATA START

; OICDSMMM ; SDO SDI SCLK DS SYSR- MUX MUX MUX

UPOKE: MOVE.B # 00000000b, D1 ; D1 : CLK 0, DATA 0
MOVE.B # 00100000b, D2 ; D2 : CLK 1, DATA 0
MOVE.B # 10000000b, D3 ; D3 : CLK 0, DATA 1
MOVE.B # 10100000b, D4 ; D4 : CLK 1, DATA 1

MOVEA.W # PORTE, A2 ; AIM AT THE FPGA I/O PORT
MOVEA.W # SWSR, A5 ; AND MAKE POINTER TO THE WATCHDOG

XBYTE: MOVE.B (A0)+, D0 ; GET A BYTE FROM THE CONFIG
FILE.
BEQ.S XNULL ; DETOUR FOR 0 BYTE

; THIS IS AN ORDINARY, NON-ZERO CONFIG BYTE...

MOVEQ.L # 8-1, D7 ; LET'S DO 8 BITS HERE

XBIT: ASL.B # 1, D0 ; TEST A BIT:
BCC.S XLO ; SKIP FOR DATA LOW

XHI: MOVE.B D3, (A2) ; CLOCK LOW, DATA HIGH
MOVE.B D4, (A2) ; CLOCK HIGH, DATA HIGH
DBF D7, XBIT ; FINISH THE BYTE

MOVE.B # 055h, (A5) ; SERVICE THE WATCHDOG
MOVE.B # 0AAh, (A5) ; TIMER, SORTA RANDOMLY
BRA.S XBYTE

XLO: MOVE.B D1, (A2) ; CLOCK LOW, DATA LOW
MOVE.B D2, (A2) ; CLOCK HIGH, DATA LOW
DBF D7, XBIT ; FINISH THE BYTE
BRA.S XBYTE


; HERE, WE HAVE A ZERO BYTE

XNULL: MOVE.B (A0)+, D7 ; NEXT BYTE IS REPEAT COUNT
BEQ.S XBAIL ; DOUBLE-0 IS END OF FILE!

; IT'S A RUN, AND D0 IS THE RUN LENGTH. BANG OUT EIGHT ZERO BITS:

ZRUN: MOVE.B D1, (A2) ; 1 CLOCK LOW, DATA LOW
MOVE.B D2, (A2) ; CLOCK HIGH, DATA LOW
MOVE.B D1, (A2) ; 2
MOVE.B D2, (A2) ;
MOVE.B D1, (A2) ; 3
MOVE.B D2, (A2) ;
MOVE.B D1, (A2) ; 4
MOVE.B D2, (A2) ;
MOVE.B D1, (A2) ; 5
MOVE.B D2, (A2) ;
MOVE.B D1, (A2) ; 6
MOVE.B D2, (A2) ;
MOVE.B D1, (A2) ; 7
MOVE.B D2, (A2) ;
MOVE.B D1, (A2) ; 8
MOVE.B D2, (A2) ;

SUBQ.B # 1, D7 ; DING OUR RUN-LENGTH COUNTER
BNE.S ZRUN ; AND FINISH THE RUN

BRA.S XBYTE

XBAIL: CLR.B (A2) ; LEAVE WITH ALL PORT E BITS
LOW!
RTS

UPSIZE = {$ - UPOKE} / 2 ; SIZE OF UPOKE ROUTINE, IN WORDS

"Chuck Harris" wrote in message
news

Do you care to share your schematics and code Chuck?

You might be able to talk me into posting an earlier version that
did pretty much everything I said, but used an 8 bit ADC in a PIC16C73.

I did that one as a prototype for the US ARMY. It was a little brutal on
the LiION batteries, as 8 bits doesn't give you a whole lot of resolution
on your CV/CI regulator.

-Chuck

Until the most recent amateur radio convention in Plano, I was charging
my HT batteries with my bench supply.

Seeing as how your design can do lead acid and Nimh, that would be nice.

I don't have any lithium batteries in the radios though I did note the new
HT designs used them...Man, are they pricey and small.

Lord Garth wrote:

"Chuck Harris" wrote in message
news

Do you care to share your schematics and code Chuck?

You might be able to talk me into posting an earlier version that
did pretty much everything I said, but used an 8 bit ADC in a PIC16C73.


Yes!

pant, pant, drool ...

But only if that for sure doesn't get you into hot water.


I did that one as a prototype for the US ARMY. It was a little brutal on
the LiION batteries, as 8 bits doesn't give you a whole lot of resolution
on your CV/CI regulator.


PWM resolution is another concern. Not so much for a charger but for a
regular switcher. Otherwise it'll go into a "burpy" mode if, for
example, you want to run the PWM at 500kHz but the timer clock can't be
more than 10MHz or so.


-Chuck


Until the most recent amateur radio convention in Plano, I was charging
my HT batteries with my bench supply.

Seeing as how your design can do lead acid and Nimh, that would be nice.

I don't have any lithium batteries in the radios though I did note the new
HT designs used them...Man, are they pricey and small.


I wish that radios, cordless phones, drills and whatnot would be run off
regular AA cells. But no, one has to plunk down big bucks the instant
the battery dies. I'd rather forego the increased capacity of LiIon.

Right now all (!) my power sticks for the hand tools are dead. Here goes
another $60 for a capacity the equivalent of $5 worth of AA-NiMH.

--
Regards, Joerg

http://www.analogconsultants.com

"Joerg" wrote in message
t...



Until the most recent amateur radio convention in Plano, I was charging
my HT batteries with my bench supply.

Seeing as how your design can do lead acid and Nimh, that would be nice.

I don't have any lithium batteries in the radios though I did note the
new
HT designs used them...Man, are they pricey and small.


I wish that radios, cordless phones, drills and whatnot would be run off
regular AA cells. But no, one has to plunk down big bucks the instant
the battery dies. I'd rather forego the increased capacity of LiIon.

Right now all (!) my power sticks for the hand tools are dead. Here goes
another $60 for a capacity the equivalent of $5 worth of AA-NiMH.


Then there seems to be the upgrade game. I can't find 12V packs for my
Ryobi drill unless I buy another drill. I can get 18V packs however. These
will become the source for the required sub C cells as they are most cost
effective.

Unknown is the cost to get them spot welded into the required configuration.

It just MIGHT be cheaper to buy a new drill with two battery packs and sell
the old one for a small offset.

Joerg wrote:
Lord Garth wrote:

"Chuck Harris" wrote in message
news

Do you care to share your schematics and code Chuck?

You might be able to talk me into posting an earlier version that
did pretty much everything I said, but used an 8 bit ADC in a PIC16C73.


Yes!

pant, pant, drool ...

But only if that for sure doesn't get you into hot water.

No problem there, I own the design, and the company.

I did that one as a prototype for the US ARMY. It was a little
brutal on
the LiION batteries, as 8 bits doesn't give you a whole lot of
resolution
on your CV/CI regulator.


PWM resolution is another concern. Not so much for a charger but for a
regular switcher. Otherwise it'll go into a "burpy" mode if, for
example, you want to run the PWM at 500kHz but the timer clock can't be
more than 10MHz or so.

The resolution is a problem for the feedback loop. I measure the supply
voltage using the PIC's 8 bit ADC with the help of a stupid simple range
selector.

The charger had to handle batteries from a couple of volts up to 28V.

The LiION batteries need the voltage held to a fairly close value, so
I adjusted the ADC's reference just for them. NiCAD's, and NiMH are more
interested in relative voltage levels, so they aren't at all critical.


-Chuck


Until the most recent amateur radio convention in Plano, I was charging
my HT batteries with my bench supply.

Seeing as how your design can do lead acid and Nimh, that would be nice.

I don't have any lithium batteries in the radios though I did note the
new
HT designs used them...Man, are they pricey and small.


I wish that radios, cordless phones, drills and whatnot would be run off
regular AA cells. But no, one has to plunk down big bucks the instant
the battery dies. I'd rather forego the increased capacity of LiIon.

There is something to be said for using standardized power sources. LiIon
are available in the usual A, AA, AAA sizes as are NiCads.

-Chuck

"Chuck Harris" wrote in message
...
Joerg wrote:
Lord Garth wrote:

"Chuck Harris" wrote in message
news

Do you care to share your schematics and code Chuck?

You might be able to talk me into posting an earlier version that
did pretty much everything I said, but used an 8 bit ADC in a
PIC16C73.


Yes!

pant, pant, drool ...

But only if that for sure doesn't get you into hot water.

No problem there, I own the design, and the company.

I did that one as a prototype for the US ARMY. It was a little
brutal on
the LiION batteries, as 8 bits doesn't give you a whole lot of
resolution
on your CV/CI regulator.


PWM resolution is another concern. Not so much for a charger but for a
regular switcher. Otherwise it'll go into a "burpy" mode if, for
example, you want to run the PWM at 500kHz but the timer clock can't be
more than 10MHz or so.

The resolution is a problem for the feedback loop. I measure the supply
voltage using the PIC's 8 bit ADC with the help of a stupid simple range
selector.

The charger had to handle batteries from a couple of volts up to 28V.

The LiION batteries need the voltage held to a fairly close value, so
I adjusted the ADC's reference just for them. NiCAD's, and NiMH are more
interested in relative voltage levels, so they aren't at all critical.


-Chuck


Until the most recent amateur radio convention in Plano, I was charging
my HT batteries with my bench supply.

Seeing as how your design can do lead acid and Nimh, that would be
nice.

I don't have any lithium batteries in the radios though I did note the
new
HT designs used them...Man, are they pricey and small.


I wish that radios, cordless phones, drills and whatnot would be run off
regular AA cells. But no, one has to plunk down big bucks the instant
the battery dies. I'd rather forego the increased capacity of LiIon.

There is something to be said for using standardized power sources. LiIon
are available in the usual A, AA, AAA sizes as are NiCads.

-Chuck

Is there any difference between LiION and LiPoly charging?

Lord Garth wrote:

I wish that radios, cordless phones, drills and whatnot would be run off
regular AA cells. But no, one has to plunk down big bucks the instant
the battery dies. I'd rather forego the increased capacity of LiIon.
There is something to be said for using standardized power sources. LiIon
are available in the usual A, AA, AAA sizes as are NiCads.

-Chuck

Is there any difference between LiION and LiPoly charging?

I don't know, I haven't looked into it. LiION basically wants
to be charged from a constant voltage source, but with the caviot
that the current must never be allowed to exceed the specified
maximum, and the voltage must never be allowed to exceed the
specified charge value... not even a little bit... it isn't so
much that the cell cares, but rather that the protection circuits
built in to the batteries get upset and permanently shut the battery
down.

SLA's really like being constant current charged with a burp, just
like NiCADs.

-Chuck

Chuck Harris wrote:

Joerg wrote:

Lord Garth wrote:

"Chuck Harris" wrote in message
news

Do you care to share your schematics and code Chuck?


You might be able to talk me into posting an earlier version that
did pretty much everything I said, but used an 8 bit ADC in a PIC16C73.


Yes!

pant, pant, drool ...

But only if that for sure doesn't get you into hot water.


No problem there, I own the design, and the company.

I did that one as a prototype for the US ARMY. It was a little
brutal on
the LiION batteries, as 8 bits doesn't give you a whole lot of
resolution
on your CV/CI regulator.


PWM resolution is another concern. Not so much for a charger but for a
regular switcher. Otherwise it'll go into a "burpy" mode if, for
example, you want to run the PWM at 500kHz but the timer clock can't
be more than 10MHz or so.


The resolution is a problem for the feedback loop. I measure the supply
voltage using the PIC's 8 bit ADC with the help of a stupid simple range
selector.

The charger had to handle batteries from a couple of volts up to 28V.


That's a tall order, especially for LiIon.


The LiION batteries need the voltage held to a fairly close value, so
I adjusted the ADC's reference just for them. NiCAD's, and NiMH are more
interested in relative voltage levels, so they aren't at all critical.


Hopefully the on-chip ADC is quiet enough all the time.



-Chuck



Until the most recent amateur radio convention in Plano, I was charging
my HT batteries with my bench supply.

Seeing as how your design can do lead acid and Nimh, that would be nice.

I don't have any lithium batteries in the radios though I did note
the new
HT designs used them...Man, are they pricey and small.


I wish that radios, cordless phones, drills and whatnot would be run
off regular AA cells. But no, one has to plunk down big bucks the
instant the battery dies. I'd rather forego the increased capacity of
LiIon.


There is something to be said for using standardized power sources. LiIon
are available in the usual A, AA, AAA sizes as are NiCads.


To me mainstream means when you can buy them at CostCo, Walmart and at
the major tourist places for a reasonable price ;-)

--
Regards, Joerg

http://www.analogconsultants.com

Joerg wrote:


The charger had to handle batteries from a couple of volts up to 28V.


That's a tall order, especially for LiIon.

Tall orders are what I specialize in ;-)

The charger had coded adapter cables that keyed into a database that had
the charge parameters, and what algorithm to use.

The entire charger module was on a 3 x 4 inch card using through hole.
The Army used it to recharge any of their small batteries, such as
the BB590 from surplus primary (Magnesium) battery packs. It was a
2 hour quick charger.

The LiION batteries need the voltage held to a fairly close value, so
I adjusted the ADC's reference just for them. NiCAD's, and NiMH are more
interested in relative voltage levels, so they aren't at all critical.


Hopefully the on-chip ADC is quiet enough all the time.

I didn't see any problems with internal ADC noise. There 10 bit chips
are quiet too... if you give them time to settle.

-Chuck

Chuck Harris wrote:
Lord Garth wrote:
Do you care to share your schematics and code Chuck?
You might be able to talk me into posting an earlier version that
did pretty much everything I said, but used an 8 bit ADC in a PIC16C73.

Sooo... have we been persuasive enough yet?

Clifford Heath wrote:
Chuck Harris wrote:
Lord Garth wrote:
Do you care to share your schematics and code Chuck?
You might be able to talk me into posting an earlier version that
did pretty much everything I said, but used an 8 bit ADC in a PIC16C73.

Sooo... have we been persuasive enough yet?

Thus far, only 2 or 3 people have wanted the info. I will have to get to
it as I can. But I will make it available. First I have to make it
presentable, and write something up on winding the transformer.

-Chuck