Michael K: /* Siehe auch */

2013-03-01T17:30:05Z

Siehe auch

Michael K: /* Siehe auch */

2013-02-20T14:42:43Z

Siehe auch

Michael K: /* Beispiel */

2013-02-19T18:38:51Z

Beispiel

Michael K: /* Action */

2013-02-19T15:31:04Z

Action

Michael K at 14:46, 19 February 2013

2013-02-19T14:46:21Z

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Admin: 1 revision

2013-02-15T19:06:57Z

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Admin: Created page with "= Action
= This statement reads the number of 1wire devices attached to the bus. ..."

2013-02-01T12:52:25Z

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== (**COPIED FROM ENGLISH PAGE**) === Action =

This statement reads the number of 1wire devices attached to the bus.

 

 

= Syntax =

var2 = 1WIRECOUNT()

var2 = 1WIRECOUNT( port , pin)

 

 

= Remarks =
<div style="text-align: left; text-indent: 0px; padding: 0px 0px 0px 0px; margin: 0px 0px 0px 4px">
{| style="border: solid 2px #000000; border-spacing:0px; border-collapse: collapse" border="1" cellpadding="1" cellspacing="0" width="604"
|- style="text-align:left; vertical-align:top"
| style="width:17%; border: solid 1px #000000" valign="top" width="17%" |
var2

| style="width:100%; border: solid 1px #000000" valign="top" width="100%" |
A WORD variable that is assigned with the number of devices on the bus.

|- style="text-align:left; vertical-align:top"
| style="width:17%; border: solid 1px #000000" valign="top" width="17%" |
port

| style="width:100%; border: solid 1px #000000" valign="top" width="100%" |
The PIN port name like PINB or PIND.

|- style="text-align:left; vertical-align:top"
| style="width:17%; border: solid 1px #000000" valign="top" width="17%" |
pin

| style="width:100%; border: solid 1px #000000" valign="top" width="100%" |
The pin number of the port. In the range from 0-7. May be a numeric constant or variable.

|}
</div>
 

The variable must be of the type word or integer.

You can use the 1wirecount() function to know how many times the 1wsearchNext() function should be called to get all the Id's on the bus.

 

The 1wirecount function will take 4 bytes of SRAM.

 

___1w_bitstorage , Byte used for bit storage :

lastdeviceflag bit 0

id_bit bit 1

cmp_id_bit bit 2

search_dir bit 3

___1wid_bit_number, Byte

___1wlast_zero, Byte

___1wlast_discrepancy , Byte

 

 

 

 

= ASM =

The following asm routines are called from mcs.lib.

 

_1wire_Count : (calls _1WIRE, _1WIRE_SEARCH_FIRST , _1WIRE_SEARCH_NEXT)

 

Parameters passed : R24 : pin number, R30 : port , Y+0,Y+1 : 2 bytes of soft stack, X : pointer to the frame space

 

Returns Y+0 and Y+1 with the value of the count. This is assigned to the target variable.

 

 

= See also =

[[1WWRITE]] , [[1WRESET]] , [[1WREAD|1WREAD ]], [[1WSEARCHFIRST]], [[1WSEARCHNEXT]] , [[Using the 1 WIRE protocol|Using the 1wire protocol]]

 

 

 

= Example =

<source lang="bascomavr">
'--------------------------------------------------------------------------------
'name : 1wireSearch.bas
'copyright : (c) 1995-2005, MCS Electronics
'purpose : demonstrates 1wsearch
'micro : Mega48
'suited for demo : yes
'commercial addon needed : no
'--------------------------------------------------------------------------------

$regfile = "m48def.dat"
$crystal = 4000000

$hwstack = 32 ' default use 32 for the hardware stack
$swstack = 10 'default use 10 for the SW stack
$framesize = 40 'default use 40 for the frame space

Config 1wire = Portb.0 'use this pin
'On the STK200 jumper B.0 must be inserted

'The following internal bytes are used by the scan routines
'___1w_bitstorage , Byte used for bit storage :
' lastdeviceflag bit 0
' id_bit bit 1
' cmp_id_bit bit 2
' search_dir bit 3
'___1wid_bit_number, Byte
'___1wlast_zero, Byte
'___1wlast_discrepancy , Byte
'___1wire_data , string * 7 (8 bytes)

'[DIM variables used]
'we need some space from at least 8 bytes to store the ID
Dim Reg_no(8) As Byte

'we need a loop counter and a word/integer for counting the ID's on the bus
Dim I As Byte , W As Word

'Now search for the first device on the bus
Reg_no(1) = 1wsearchfirst()

For I = 1 To 8 'print the number
Print Hex(reg_no(i));
Next
Print

Do
'Now search for other devices
Reg_no(1) = 1wsearchnext()
For I = 1 To 8
Print Hex(reg_no(i));
Next
Print
Loop Until Err = 1

'When ERR = 1 is returned it means that no device is found anymore
'You could also count the number of devices
W = 1wirecount()
'It is IMPORTANT that the 1wirecount function returns a word/integer
'So the result variable must be of the type word or integer
'But you may assign it to a byte or long too of course
Print W

'as a bonus the next routine :
' first fill the array with an existing number
Reg_no(1) = 1wsearchfirst()
' unremark next line to chance a byte to test the ERR flag
'Reg_no(1) = 2
'now verify if the number exists
1wverify Reg_no(1)
Print Err
'err =1 when the ID passed n reg_no() does NOT exist
' optinal call it with pinnumber line 1wverify reg_no(1),pinb,1

'As for the other 1wire statements/functions, you can provide the port and pin number as anoption
'W = 1wirecount(pinb , 1) 'for example look at pin PINB.1
End
</source> {{Languages}}

[[Category:BASCOM_Language_Reference/de]]

@@ Line 101: / Line 101: @@
 = <span class="f_Header">Siehe auch</span><br/> =
-[[1WWRITE]] , [[1WRESET]] , [[1WREAD|1WREAD ]] , [[1WSEARCHFIRST]] , [[1WSEARCHNEXT]] , [[1WVERIFY]] , [[Using the 1 WIRE protocol|Using the 1wire protocol]]
+[[CONFIG 1WIRE]] , [[1WWRITE]] , [[1WRESET]] , [[1WREAD|1WREAD ]] , [[1WSEARCHFIRST]] , [[1WSEARCHNEXT]] , [[1WVERIFY]] , [[Using the 1 WIRE protocol|Using the 1wire protocol]]
 <span style="font-family: 'Arial';  color: #000000">&nbsp;</span>

@@ Line 101: / Line 101: @@
 = <span class="f_Header">Siehe auch</span><br/> =
-[[1WWRITE]] , [[1WRESET]] , [[1WREAD|1WREAD ]], [[1WSEARCHFIRST]], [[1WSEARCHNEXT]] , [[Using the 1 WIRE protocol|Using the 1wire protocol]]
+[[1WWRITE]] , [[1WRESET]] , [[1WREAD|1WREAD ]] , [[1WSEARCHFIRST]] , [[1WSEARCHNEXT]] , [[1WVERIFY]] , [[Using the 1 WIRE protocol|Using the 1wire protocol]]
 <span style="font-family: 'Arial';  color: #000000">&nbsp;</span>

@@ Line 186: / Line 186: @@
 ' zuerst das Array mit einer existierenden ID füllen
 Reg_no(1) = 1wsearchfirst()
-' um ein Byte zu änern und das Err-Flag zu testen, nächste Zeile auskommentieren
+' um ein Byte zu ändern und das Err-Flag zu testen, nächste Zeile auskommentieren
 'Reg_no(1) = 2
 'jetzt eine Prüfung, ob die ID existiert

← Older revision		Revision as of 15:31, 19 February 2013
Line 1:		Line 1:
−	= <span class="f_Header">~~Action~~</span><br/> =	+	= <span class="f_Header">Funktion</span><br/> =

	Dieser Befehl ermittelt die Anzahl von 1wire-Slaves am Bus.		Dieser Befehl ermittelt die Anzahl von 1wire-Slaves am Bus.

1WIRECOUNT/de - Revision history

Michael K: /* Siehe auch */

Michael K: /* Siehe auch */

Michael K: /* Beispiel */

Michael K: /* Action */

Michael K at 14:46, 19 February 2013

Admin: 1 revision

Admin: Created page with "= Action = This statement reads the number of 1wire devices attached to the bus. ..."

Admin: Created page with "= Action
= This statement reads the number of 1wire devices attached to the bus. ..."