On Mon, 4 May 2009, David Kelly wrote: > On Mon, May 04, 2009 at 10:21:50PM +0930, Daniel O'Connor wrote: > > On Mon, 4 May 2009, Bob Paddock wrote: > > > > ? ? ? ? ? ? ? ?uint16_t voltage[24]; ? // adc counts of 24 > > > > channels in an array } ED; ? ? ? ? ? // total data = 58 bytes > > > > > > Because of issues of structure packing it is better to define > > > structure items from the largest to the smallest, ie. uint16_t > > > should be first. This is more important on 32bit processors and > > > up than on the 8bit AVRs. > > I suspect this is a homework assignment and the structure was > provided.
Ah hmm.. The typedef names are fairly poor practise then. > If I was defining the ED structure then I'd store 4 bytes of seconds > since some epoch rather than 6 bytes of year, month, day, hour, > minute, second. Much simpler, and routines to convert from seconds > are readily available in OS's and spreadsheets. It's OK so long as you don't have to deal with leap seconds :( (ie dictate that it is in UTC, and make the recipient of your data do the work) -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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