* [ECOS] RTC format
@ 2001-07-16 14:09 Trenton D. Adams
2001-07-16 14:14 ` Trenton D. Adams
0 siblings, 1 reply; 3+ messages in thread
From: Trenton D. Adams @ 2001-07-16 14:09 UTC (permalink / raw)
To: 'eCos Discussion'
Is there a standard format for RTCs? I don't know what to write to the
RTC 32-bit register to set it. I came up with my own hh:mm:ss.xxx
format for storage in a 32 bit register, but I wonder if it's
compatible? After all, I certainly hope it's not based on ms from some
date because it would only store 49.xxx days then.
bit | measurement
_________________
27-23 | hours
22-17 | minutes
16-10 | seconds
9-0 | milliseconds
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: [ECOS] RTC format
2001-07-16 14:09 [ECOS] RTC format Trenton D. Adams
@ 2001-07-16 14:14 ` Trenton D. Adams
0 siblings, 0 replies; 3+ messages in thread
From: Trenton D. Adams @ 2001-07-16 14:14 UTC (permalink / raw)
To: 'Trenton D. Adams', 'eCos Discussion'
I just noticed it's a 1Hz clock so I assume it's stored in seconds from
1980? I don't think 49,710 years will be a problem! :)
> -----Original Message-----
> From: ecos-discuss-owner@sources.redhat.com
> [ mailto:ecos-discuss-owner@sources.redhat.com ] On Behalf Of
> Trenton D. Adams
> Sent: Monday, July 16, 2001 3:10 PM
> To: 'eCos Discussion'
> Subject: [ECOS] RTC format
>
>
> Is there a standard format for RTCs? I don't know what to
> write to the RTC 32-bit register to set it. I came up with
> my own hh:mm:ss.xxx format for storage in a 32 bit
> register, but I wonder if it's compatible? After all, I
> certainly hope it's not based on ms from some date because
> it would only store 49.xxx days then.
>
> bit | measurement
> _________________
> 27-23 | hours
> 22-17 | minutes
> 16-10 | seconds
> 9-0 | milliseconds
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: [ECOS] RTC format
@ 2001-07-16 14:55 Trenton D. Adams
0 siblings, 0 replies; 3+ messages in thread
From: Trenton D. Adams @ 2001-07-16 14:55 UTC (permalink / raw)
To: 'Trenton D. Adams', 'eCos Discussion'
I forgot to divide by 365! :) So, it's actually 136 years if anyone
cares. I doubt they do.
> -----Original Message-----
> From: Trenton D. Adams [ mailto:tadams@extremeeng.com ]
> Sent: Monday, July 16, 2001 3:15 PM
> To: 'Trenton D. Adams'; 'eCos Discussion'
> Subject: RE: [ECOS] RTC format
>
>
> I just noticed it's a 1Hz clock so I assume it's stored in
> seconds from 1980? I don't think 49,710 years will be a problem! :)
>
> > -----Original Message-----
> > From: ecos-discuss-owner@sources.redhat.com
> > [ mailto:ecos-discuss-owner@sources.redhat.com ] On Behalf Of
> > Trenton D. Adams
> > Sent: Monday, July 16, 2001 3:10 PM
> > To: 'eCos Discussion'
> > Subject: [ECOS] RTC format
> >
> >
> > Is there a standard format for RTCs? I don't know what to
> > write to the RTC 32-bit register to set it. I came up with
> > my own hh:mm:ss.xxx format for storage in a 32 bit
> > register, but I wonder if it's compatible? After all, I
> > certainly hope it's not based on ms from some date because
> > it would only store 49.xxx days then.
> >
> > bit | measurement
> > _________________
> > 27-23 | hours
> > 22-17 | minutes
> > 16-10 | seconds
> > 9-0 | milliseconds
> >
> >
>
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