How do I discern Maidenhead Locator from GPS lat long info.

[richard]

the only thing I might add is that the conversion from utc to local time only needs to be done if and when the hour changes , its not needed in every loop.
a flag can be set when the utc hour now is != current utc hour , then the flag can be cleared when the conversion is done

[astanapane]

the only thing I might add is that the conversion from utc to local time only needs to be done if and when the hour changes , its not needed in every loop.
a flag can be set when the utc hour now is != current utc hour , then the flag can be cleared when the conversion is done

Hi Richard, once again thanks a lot for your kind help and time.

I work on this very slow, because i need to understand the code, and then i need to test the code every time i change something.

Now i need to fix the months. Please give me some time. I will upload the code and then we can discuss what might need to be done.

As i have it in mind, i need to create a label. Under the label i need to speciafy which month has 30 days and which has 31 at the begging. For the month February i need to specify which YEAR is 28 days and which is 29.

Then i will connect the code:

ay_added = 0
hh = hh + 3
if  hh > 23 then
day_added = 1
endif
hh = hh//24
if day_added = 1 then
day = day + 1
if day > num_date then ; i havent done anything to this up to now. I need to figure out how to tell the programm about the num_date (No of the day today in this month)
day = 1
if month > 12 then
month = 1
year = year +1
    endif
      endif
        endif

to the Label which has all the info for each month.

Is that right?

[richard]

getting the number of day in month can be achieved in a few ways

simple is lookup
but resource hungryLOOKUP Index,[Constant{,Constant...}],Var

lookup month,[0,31,28,31,30,,,,,,,,,,,,,],numberofdays

an array
more efficient but uses more sram
arraywrite ndays,[0,31,28,31,30,,,,,,,,,,,,,]
numberofdays=ndays[month]


leap years
are

if ((year//4 = 0) and (year//400 !=0))
if month=2 then numberofdays=numberofdays+1
endif

[astanapane]

Hi Richard,

thanks! i need some time, as at work we need to be prepared for a surgery at a 1 day old baby. I have to design the heart model for pre-surgical planning. But this weekend i will try to fix the code with either lookup or arrays .

[astanapane]

i try to understand the "Arraywrite".

So we that command, we set the Months from January to December with values (how many days each months have).

Please let me undestand if that is right:

At the beggining of the program i need to create an array called 'ndays'

ndays   VAR    BYTE [12] 'create an array with 12 byte location for months values

Then i might need to create an ALIAS the location for each month?

January  VAR   ndays[0]
February  VAR   ndays[1]
March  VAR   ndays[2]
April  VAR   ndays[3]
May  VAR   ndays[4]
June  VAR   ndays[5]
July  VAR   ndays[6]
August  VAR   ndays[7]
September  VAR   ndays[8]
October  VAR   ndays[9]
November  VAR   ndays[10]
December  VAR   ndays[11]

But i guess that i need to specify somewhere how many days each month have.

nday[0] = 31
ndays[1] = 28
ndays[2] = 31
ndays[3] = 30
ndays[4] = 31
ndays[5] = 30
ndays[6] = 31
ndays[7] = 31
ndays[8] = 30
ndays[9] = 31
ndays[10] = 30
ndays[11] = 31

Up to here is that right?

[richard]

ndays VAR BYTE [13] 'create an array with 12 byte location for months values
nday[0] = 0
nday[1] = 31
ndays[2] = 28
ndays[3] = 31
......
ndays[11] = 30
ndays[12] = 31

ps its easier to arraywrite ndays,[0,31,28....]


reason , when you get the month from the nmea sentence you will store the month as a number from 1 to 12
for the sake of one byte why add the complication of needing to calculate an offset into the lookup table ?

num_days_this_mth = ndays[month] where month = 1 to 12

January VAR ndays[0]
February VAR ndays[1]
March VAR ndays[2]
April VAR ndays[3]
May VAR ndays[4]
June VAR ndays[5]
July VAR ndays[6]
August VAR ndays[7]
September VAR ndays[8]
October VAR ndays[9]
November VAR ndays[10]
December VAR ndays[11]

all of these aliases are just a pointless typing exercise ,unless you have something else in mind for them

[astanapane]

ndays VAR BYTE [13] 'create an array with 12 byte location for months values
nday[0] = 0
nday[1] = 31
ndays[2] = 28
ndays[3] = 31
......
ndays[11] = 30
ndays[12] = 31

ps its easier to arraywrite ndays,[0,31,28....]


reason , when you get the month from the nmea sentence you will store the month as a number from 1 to 12
for the sake of one byte why add the complication of needing to calculate an offset into the lookup table ?

num_days_this_mth = ndays[month] where month = 1 to 12


all of these aliases are just a pointless typing exercise ,unless you have something else in mind for them

For now,i wont use the Aliases, i thought i could use the name instead of the numbers.

Apart from that i think i need to read more about arraywrite and see more examples if there are in this forum.