SV: [basicstamps] Please help clearing my doubts
Archiver
Posts: 46,084
Greetings!
1. you will need some sort of external clock.
(Someone will no boubt recomment one made for the Stamp :-)
2. You may be able to get away with just the storage space on the BS2...
4 events a day for a week is 28.
- Time can be stored as two Bytes, Hour and minutes, and
- Date can be stored as YY:MM[noparse]:D[/noparse]T, three Bytes. Possibly, you could even
scrunch the three bytes into 2, but lets say 3 for now. (For a low number of
events the scrunching procedure will take up more program space than you
save :-)
That gives a total of 5 Bytes multiplied by 28 which is 140Bytes in total.
The BS2 have 2KB of storage, so there should be room to spare for your
program...
(PBasic makes for very compact code :-)
:-)
Trygve
Opprinnelig melding
Fra: chongkhaishin <800205015763@n...>
[noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=J5Q0AinQJn7EekWC8uXlUP4l7-8x_KZDJNRxaozok3_kpWg8NJue8ONE8UcP15uSzDaalczOxF7V6MpV19Mt]800205015763@n...[/url
Sendt: 11. desember 2002 04:14
Til: basicstamps@yahoogroups.com
Emne: [noparse][[/noparse]basicstamps] Please help clearing my doubts
Situation: new to BS, having a BS2 module
Task: log date and time upon triggered of sensor, 4 sets of date &
time per day for a week. Size ia a problem for this porject.
Doubts:
1. Can i achieve this without a Real Time Clock & External EEPROM?
2. Do i need to write/get a program that count year, month, day,
hour, min and download to BS2?
3. Any better suggestion?
Thanks pals, and have a nice day!
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1. you will need some sort of external clock.
(Someone will no boubt recomment one made for the Stamp :-)
2. You may be able to get away with just the storage space on the BS2...
4 events a day for a week is 28.
- Time can be stored as two Bytes, Hour and minutes, and
- Date can be stored as YY:MM[noparse]:D[/noparse]T, three Bytes. Possibly, you could even
scrunch the three bytes into 2, but lets say 3 for now. (For a low number of
events the scrunching procedure will take up more program space than you
save :-)
That gives a total of 5 Bytes multiplied by 28 which is 140Bytes in total.
The BS2 have 2KB of storage, so there should be room to spare for your
program...
(PBasic makes for very compact code :-)
:-)
Trygve
Opprinnelig melding
Fra: chongkhaishin <800205015763@n...>
[noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=J5Q0AinQJn7EekWC8uXlUP4l7-8x_KZDJNRxaozok3_kpWg8NJue8ONE8UcP15uSzDaalczOxF7V6MpV19Mt]800205015763@n...[/url
Sendt: 11. desember 2002 04:14
Til: basicstamps@yahoogroups.com
Emne: [noparse][[/noparse]basicstamps] Please help clearing my doubts
Situation: new to BS, having a BS2 module
Task: log date and time upon triggered of sensor, 4 sets of date &
time per day for a week. Size ia a problem for this porject.
Doubts:
1. Can i achieve this without a Real Time Clock & External EEPROM?
2. Do i need to write/get a program that count year, month, day,
hour, min and download to BS2?
3. Any better suggestion?
Thanks pals, and have a nice day!
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.
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Comments
only need save a nibble (4 bits) for how many days after the test
started each measurement was made. That still gives 15 days of
coverage. It also saves bytes instead of saving the whole date each
time.
Harry
Stamp Robotics to the next level
www.bluebelldesign.com
--- In basicstamps@yahoogroups.com, Trygve Henriksen
<trygve.henriksen@v...> wrote:
> Greetings!
>
> 1. you will need some sort of external clock.
> (Someone will no boubt recomment one made for the Stamp :-)
>
> 2. You may be able to get away with just the storage space on the
BS2...
>
> 4 events a day for a week is 28.
> - Time can be stored as two Bytes, Hour and minutes, and
> - Date can be stored as YY:MM[noparse]:D[/noparse]T, three Bytes. Possibly, you could
even
> scrunch the three bytes into 2, but lets say 3 for now. (For a low
number of
> events the scrunching procedure will take up more program space
than you
> save :-)
>
> That gives a total of 5 Bytes multiplied by 28 which is 140Bytes in
total.
> The BS2 have 2KB of storage, so there should be room to spare for
your
> program...
> (PBasic makes for very compact code :-)
>
> :-)
> Trygve
>
>
>
Opprinnelig melding
> Fra: chongkhaishin <800205015763@n...>
> [noparse][[/noparse]mailto:800205015763@n...]
> Sendt: 11. desember 2002 04:14
> Til: basicstamps@yahoogroups.com
> Emne: [noparse][[/noparse]basicstamps] Please help clearing my doubts
>
>
> Situation: new to BS, having a BS2 module
>
> Task: log date and time upon triggered of sensor, 4 sets of date &
> time per day for a week. Size ia a problem for this porject.
>
> Doubts:
> 1. Can i achieve this without a Real Time Clock & External EEPROM?
> 2. Do i need to write/get a program that count year, month, day,
> hour, min and download to BS2?
> 3. Any better suggestion?
>
> Thanks pals, and have a nice day!
>
>
> 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/