Micro Progamming help-CLARIFICATION

[hamilton]

I quoted that because there isn't a great deal of work if I use the MSP430
watch. TI has the time and date routines in their application literature, so
it's mainly a question of putting them together and modifying the existing
display code slightly. There is no hardware development required.

Leon

I checked TIs site and could not find the watch from the seminar.
Is it still available and how much does it cost ?

 

[Leon Heller]

I checked TIs site and could not find the watch from the seminar.
Is it still available and how much does it cost ?

They gave them away to attendees, but they haven't got any to sell, AFAIK. I
doubt if they have any left, and all the info on it seems to disappeared
from the TI web site. Your best bet is to join the MSP430 Yahoo group:
http://groups.yahoo.com/group/msp430/ and see if anyone wants to part with
theirs.

I've got all the info about the 'watch', which includes the schematic and
the source code, if you want them. It was made by Softbaugh for TI, and uses
an LCD that they sell, so it would be quite easy to design a PCB and make
something similar. It actually has a lot of functionality as it uses the
MSP430F437 which includes a 12-bit ADC (brought out to a header), and can
measure the ambient temperature with the on-chip sensor, record sound, etc.

Leon

Leon

 

[Jonathan Kirwan]

They gave them away to attendees, but they haven't got any to sell, AFAIK. I
doubt if they have any left, and all the info on it seems to disappeared
from the TI web site. Your best bet is to join the MSP430 Yahoo group:
http://groups.yahoo.com/group/msp430/ and see if anyone wants to part with
theirs.

I've got all the info about the 'watch', which includes the schematic and
the source code, if you want them. It was made by Softbaugh for TI, and uses
an LCD that they sell, so it would be quite easy to design a PCB and make
something similar. It actually has a lot of functionality as it uses the
MSP430F437 which includes a 12-bit ADC (brought out to a header), and can
measure the ambient temperature with the on-chip sensor, record sound, etc.

See upper right sidebar of:

http://www.softbaugh.com/

MSP430 Retro Watch LCD
MSP430-Day Attendees get the LCD on the 430 Retro Watch

Also see the LCD itself at $9.50 ea in 1's:

http://www.softbaugh.com/ProductPage.cfm?strPartNo=SBLCDA4

Is this it, Leon?

Jon

 

[Leon Heller]

See upper right sidebar of:

http://www.softbaugh.com/

MSP430 Retro Watch LCD
MSP430-Day Attendees get the LCD on the 430 Retro Watch

Also see the LCD itself at $9.50 ea in 1's:

http://www.softbaugh.com/ProductPage.cfm?strPartNo=SBLCDA4

Is this it, Leon?

Yes, that's the beast.

Leon

 

[YD]

Actually, it would count 5s, 10s, 15s, 20s, 25s, 30s, 35s, 40s, 45s,
50s,55s, 1m, 1m5sec,1m10s........1m,55s,
2m.....59m55sec,1h.............................etc

The first counter can be a simple toggle FF to drive the display, 0 =
0, 1 = 5. Since segments a, c, d and f are always on just drive them
with resistors. Connect b and e to !Q, g to Q and you're done.

The rest of the counter chain is a rather standard clock circuit, look
up the 7490 app notes, ISTR there's an example there. You can even
save a bit by using the A divider for the first digit and the B
divider for the 0 to 5 counter. Oooops, no !Qa output on it, use an
inverter.

Of course, the 7490 is prehistoric now, and hardly optimized for space
nor power, so just do what everyone else seems to do, throw a PIC at
it.

Note: !Q is Q-bar.

- YD.

 

[Rich Grise]

The first counter can be a simple toggle FF to drive the display, 0 =
0, 1 = 5. Since segments a, c, d and f are always on just drive them
with resistors. Connect b and e to !Q, g to Q and you're done.

The rest of the counter chain is a rather standard clock circuit, look
up the 7490 app notes, ISTR there's an example there. You can even
save a bit by using the A divider for the first digit and the B
divider for the 0 to 5 counter. Oooops, no !Qa output on it, use an
inverter.

Of course, the 7490 is prehistoric now, and hardly optimized for space
nor power, so just do what everyone else seems to do, throw a PIC at
it.

Note: !Q is Q-bar.

FWIW, the 7492 had a divide-by two and a divide-by-SIX, which was handy
for 60 minutes or 12 hours.

Cheers!
Rich