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suibaf
Joined: 03 Oct 2004
Posts: 32
Location: Lecce
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 Posted: Mon Apr 14, 2014 6:16 pm Post subject: array error |
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To avoid unpleasant reproaches I tryed to search for my problem, but I have not found the answer. If there is, can you sign me please?
In the help file there is :
| Code: | 'the empty () indicated that an array will be passed
Declare Sub Teststr(b As Byte , Dl() As String)
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In my case I have a sub that I have declared:
| Code: | Declare Sub Lcd_message(byval Indice_messaggio As Byte , Byval Message_array() As Byte) |
and then I tryed to use with no success:
| Code: | Lcd_message(1 , Ric_idcard()) |
I tryed with call, without with different message error as you can see at row 276 and 312
Apologize if the question is fool, but I don't understand something.
BR
(BASCOM-AVR version : 2.0.7.7 )
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albertsm
Joined: 09 Apr 2004
Posts: 5921
Location: Holland
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| Posted: Mon Apr 14, 2014 6:59 pm Post subject: |
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| Code: | Declare Sub Lcd_message(byval Indice_messaggio As Byte , Message_array() As Byte)
dim ar(10) as Byte , b as byte
for b = 1 to 10
ar(b) = b
next
lcd_message 3 , ar(1)
Sub Lcd_message(byval Indice_messaggio As Byte , Message_array() As Byte)
print message_array(Indice_messaggio)
end sub |
in the declare you use () but when passing data, you need to pass the first element.
also notice that arrays are passed byref.
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suibaf
Joined: 03 Oct 2004
Posts: 32
Location: Lecce
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| Posted: Mon Apr 14, 2014 9:32 pm Post subject: |
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Mr. Alberts,
you are right, and in the file help is wrote, only now I have read. But I use also in this mode without warning message:
| Code: | Ceck_ric_reader_rfid Rcv_buff() |
Where is the difference?
BR
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albertsm
Joined: 09 Apr 2004
Posts: 5921
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| Posted: Mon Apr 14, 2014 9:55 pm Post subject: |
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when you omit an element, the first will be used. but it is much better to be specific.
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suibaf
Joined: 03 Oct 2004
Posts: 32
Location: Lecce
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| Posted: Tue Apr 15, 2014 10:17 pm Post subject: |
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| Quote: | | also notice that arrays are passed byref. |
OK thank you Mr. Alberts, it's clear. But I've notice that if I have a sub:
| Code: | Declare Sub Lcd_message(byval Indice_messaggio As Byte , Message_array() As Byte) |
Message_array is passed byref. But inside sub when I use Message_array i have no correct value! (strange value that i no understand). So only for test inside sub I used original array and the value is correct!
Is there some concept that i lose?
BR
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albertsm
Joined: 09 Apr 2004
Posts: 5921
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| Posted: Tue Apr 15, 2014 10:39 pm Post subject: |
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without code it is hard to tell.
but the concept of passing an array is simple : you pass byreference which means you pass the address of the array.
in the sub you refer to this array with the name you used to pass.
| Code: | dim ar(10) as byte
declare sub test(some() as byte)
sub test(some() as byte)
print some(1) 'will print content of ar(1)
end sub
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if the content is not right, test if the passed array is still ok.
you should post some code that demos your problem. (no screen shots)
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suibaf
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albertsm
Joined: 09 Apr 2004
Posts: 5921
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| Posted: Thu Apr 17, 2014 10:14 pm Post subject: |
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when you call the sub, use : Lcd_message 1 , Rcv_buff(1)
that is, the first array element.
if you get strange values, it might be because of an interrupt. in that case, increase $hwstack
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