writing word variables to data memory

[malc-c]

Guys (and gals)

Following on from This Thread , I've spent best part of this evening searching the forum and web for examples of how to save a word variable to the PICs memory so that it reads them back when the PIC should the power fail.

Can anyone put me out of my misery

[rsocor01]

Guys (and gals)

Following on from This Thread , I've spent best part of this evening searching the forum and web for examples of how to save a word variable to the PICs memory so that it reads them back when the PIC should the power fail.

Can anyone put me out of my misery

What exactly are you trying to write to memory? From your other thread, you said it is a combination of words and bytes. What variables are bytes and which ones are words?

Robert

[malc-c]

Sorry I might not of got the point over

lightsetHR[fn]
lightsetMN[fn]
lightoffHR[fn]
lightoffMN[fn]
droptemp[fn]
normtemp[fn]
StartHour[fn]
StartMin[fn]
StopHour[fn]
StopMin[fn]
alarmhigh[fn]
alarmlow[fn]

They are all WORD variables, but as all those in blue have values that are typically two digits (eg Hours will be between 00 and 23, with minutes being 00 to 59). they get saved and read OK for some reason. All those in red will be three digit values, eg 327, 150 and it's these that don't get saved. Each Word variable has 4 elements for example ,

alarmhigh[0]
alarmhigh[1]
alarmhigh[2]
alarmhigh[3]

These will have different values depending on what has been set in a previous section
eg:

alarmhigh[0]=340
alarmhigh[1]=360
alarmhigh[2]=400
alarmhigh[3]=370

Hope that helps clarify my issue

[Acetronics2]

Hi, Malc

Did you simply tried to Open the Holy Manual ???

supposing you use the PBP 2.60a Version ... it is at page 175 ...

supposing you use previous version ( 2.50b ) ... it is at page 162 ...

examples for WORDs given.

You also should have a look to $ 4.4 p 25 " Aliases " ... where it is shown how to " slice " your values ...

Alain

[malc-c]

Hi, Malc

Did you simply tried to Open the Holy Manual ???



Alain

http://www.picbasic.co.uk/forum/show...2176#post92176

Just don't quite understand it... (sorry I'm thick ! - care to actually explain how I would do this " Aliases " ... where it is shown how to " slice " your values thing ?)

[Acetronics2]

http://www.picbasic.co.uk/forum/show...2176#post92176

Just don't quite understand it... (sorry I'm thick ! - care to actually explain how I would do this " Aliases " ... where it is shown how to " slice " your values thing ?)

Ok Malc ...

let's make it easy :

The last PBP2.60 Version has introduced a Qualifier that permits you NOT to care with slicing your variables ...
so, if you own a v2.60 ( and You SHOULD ) ... the link you gave me becomes ... obsolete.

as you, NOW, just have to write:

WRITE Location, Word AlarmHigh[1] , Word AlarmHigh[2] , Word AlarmHigh[3] ,...

READ Location, Word AlarmHigh[1], Word AlarmHigh[2] , Word AlarmHigh[3], WA[1],WA[2],WA[3]

BUT remember a word need 2 EEPROM locations ... so,

WRITE Location +6 , Word AlarmHigh[4]
READ Location +6 , Word AlarmHigh[4] ,WA4

Alain

PS: of course, you can keep on using the " old method "

WRITE Location, AlarmHigh[1].Lowbyte
WRITE Location+1, AlarmHigh[1].Highbyte
WRITE Location+2, AlarmHigh[2].Lowbyte
WRITE Location+3, AlarmHigh[2].Highbyte
WRITE Location+4, AlarmHigh[3].Lowbyte
WRITE Location+5, AlarmHigh[3].Highbyte
WRITE Location+6, AlarmHigh[4].Lowbyte
WRITE Location+7, AlarmHigh[4].Highbyte

... but, is it really reasonnable ???