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ENCODER

 
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sielcon

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Joined: 16 Mar 2006
Posts: 62
Location: Argentina

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PostPosted: Wed Sep 18, 2019 9:30 pm    Post subject: ENCODER Reply with quote

Hello everyone. I was trying to use the Keyes encoder and it really didn't work well with the ENCODER function, I did a small routine in interruptions per level that left me very satisfied.
I leave them in case someone can be useful.
Regards

Code:

'-------------test encoder rotativo Keyes ------------------------------------------

$regfile = "m328pdef.dat"
$crystal = 16000000
$baud = 19200
$swstack = 128
$framesize = 128

Config Submode = New


Dim Actu As Byte
Portb = &B111
Rota Alias Pinb.0
Rotb Alias Pinb.1
Config Button = Input
Config Rota = Input
Config Rotb = Input

Enable Interrupts
Enable Pcint0
On Pcint0 Isr_pcint0
Pcmsk0 = &B0000011
'------------------------------------------------------------------------------------------------------------------
Actu = 0

Do
Loop

End
'----------------------------------
Isr_pcint0:
If Rota = 0 Then
   Do
   Loop Until Rotb = 0
   Incr Actu
   Print Actu
   Goto Isr1
End If

If Rotb = 0 Then
   Do
   Loop Until Rota = 0
   Decr Actu
   Print Actu
End If
Isr1:
Do
   Rotab = Pinb
   Rotab = Rotab And 3
Loop Until Rotab = 3
Waitms 5
Return

 
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Arek2014

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Joined: 30 Dec 2014
Posts: 22
Location: Kielce

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PostPosted: Wed Sep 25, 2019 8:28 pm    Post subject: Reply with quote

Code:
config pind.1 = input

Config Int1 = Falling
On Int1 enkoder

dim a as byte

enable interrupts
enable int1

Do
Loop

enkoder:
If Pind.1 = 0 Then
Incr A
End If
If Pind.1 = 1 Then
Decr A
End If
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sielcon

Bascom Member



Joined: 16 Mar 2006
Posts: 62
Location: Argentina

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PostPosted: Fri Sep 27, 2019 3:50 am    Post subject: Reply with quote

Yes, this is the way to do it, but I use Int0 and Int1 for another application
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CBailey

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Joined: 07 May 2015
Posts: 41

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PostPosted: Mon Jan 23, 2023 5:53 am    Post subject: Reply with quote

Sorry to dig up an old thread. I'm trying to use an encoder on a Mega328p. I have it working fine using ENCODER, but it just sits there waiting for input. I tried compiling the above code, but got a bunch of errors I couldn't figure out. Should I just configure ENCODER to not wait, and put it in my Do-Loop, or are interrupts the way to go? I'll probably be using interrupts for timers later.
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albertsm

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Joined: 09 Apr 2004
Posts: 5657
Location: Holland

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PostPosted: Mon Jan 23, 2023 10:17 am    Post subject: Reply with quote

encoder() must be called in a loop, or be triggered by an interrupt, for example a timer. but when you have pcint interrupt you could use that as well.
it depends a bit on the encoder and your app.
when you have problems, you always best show a small as possible piece of code of what you tried. the code posted earlier should work for you too.

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O-Family

Bascom Expert



Joined: 23 May 2010
Posts: 294
Location: Japan

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PostPosted: Mon Jan 23, 2023 11:12 am    Post subject: Reply with quote

Two rotary encoders are available.
Attach a pull-up resistor and a CR noise filter to the encoder input.
If the main routine goes around fast enough, it can be used without interrupts.
Code:

$regfile = "m88pdef.dat"
$crystal = 8000000
   '
$hwstack = 64
$swstack = 32
$framesize = 24

   '
   '  * Port name definition *
   '
   Encoder_1a Alias Pind.0                                  'Connection port for [A] pin of rotary encoder [1].
   Encoder_1b Alias Pind.1                                  'Connection port for [B] pin of rotary encoder [1].
   Encoder_2a Alias Pind.2                                  'Connection port for [A] pin of rotary encoder [2].
   Encoder_2b Alias Pind.3                                  'Connection port for [B] pin of rotary encoder [2].
   '
   '  * Declaring variables *
   '
   Dim Encoder1temp As Byte                                 'Saves the state before the change of the rotary encoder [1]. (b1,b0)
   Dim Encoder2temp As Byte                                 'Saves the state before the change of the rotary encoder [2]. (b1,b0)
   Dim Encoder1sta As Byte                                  'Rotation detection flag for rotary encoder[1]. (Rotate right: [1000_0111], Rotate left: [0100_1011])
   Dim Encoder2sta As Byte                                  'Rotation detection flag for rotary encoder[2]. (Rotate right: [1000_0111], Rotate left: [0100_1011])
   Dim Testdata1 As Byte                                    'Test data for rotary encoder [1].
   Dim Testdata2 As Byte                                    'Test data for rotary encoder [2].
   Dim Temp1 As Byte
   Dim Temp2 As Byte

   '
   '  * LCD initial settings *
   '
   Config Lcdmode = Port
   Config Lcdbus = 4
   Config Lcdpin = Pin , Db4 = Portb.3 , Db5 = Portb.2
   Config Lcdpin = Pin , Db6 = Portb.1 , Db7 = Portb.0
   Config Lcdpin = Pin , E = Portb.4 , Rs = Portb.5
   Config Lcd = 16 * 2
   Cursor Off
   Cls

   '
   Testdata1 = 0                                            'Initialize test data.
   Testdata2 = 0

Main:
   Do
      Gosub Encoderread                                     'Detects the rotation of a rotary encoder.

      '
      '  * Processing Rotary Encoder [1] *
      '
      Select Case Encoder1sta
         Case &B1000_0111 :                                 'If the rotary encoder [1] is rotating clockwise.
            Incr Testdata1
            Locate 1 , 1
            Lcd Testdata1 ; "  "
            Encoder1sta = 0
            '
         Case &B0100_1011 :                                 'If the rotary encoder [1] is rotating counterclockwise.
            Decr Testdata1
            Locate 1 , 1
            Lcd Testdata1 ; "  "
            Encoder1sta = 0
      End Select

      '
      '  * Processing Rotary Encoder [2] *
      '
      Select Case Encoder2sta
         Case &B1000_0111 :                                 'If the rotary encoder [2] is rotating clockwise.
            Incr Testdata2
            Locate 2 , 1
            Lcd Testdata2 ; "  "
            Encoder2sta = 0
            '
         Case &B0100_1011 :                                 'If the rotary encoder [2] is rotating counterclockwise.
            Decr Testdata2
            Locate 2 , 1
            Lcd Testdata2 ; "  "
            Encoder2sta = 0
      End Select
   Loop

   '
   '  ********************************************
   '  * Detects the rotation of a rotary encoder *
   '  ********************************************
   '
Encoderread:
   Temp1 = Encoder_1a                                       'Read pin of rotary encoder [1].
   Temp1.1 = Encoder_1b
   Temp2 = Encoder1temp Xor Temp1                           'Compare with the previous state.
   If Temp2 <> 0 Then                                       'Has the rotary encoder [1] changed?
      Encoder1temp = Temp1                                  'Store the state of the change.
      Shift Encoder1sta , Left , 2                          'Shift the bit state of the pulse by 2 bits to the left
      Encoder1sta = Encoder1sta Or Temp1                    'Add rotation bit state.
   End If
   '
   Temp1 = Encoder_2a                                       'Read pin of rotary encoder [2].
   Temp1.1 = Encoder_2b
   Temp2 = Encoder2temp Xor Temp1                           'Compare with the previous state.
   If Temp2 <> 0 Then                                       'Has the rotary encoder [2] changed?
      Encoder2temp = Temp1                                  'Store the state of the change.
      Shift Encoder2sta , Left , 2                          'Shift the bit state of the pulse by 2 bits to the left
      Encoder2sta = Encoder2sta Or Temp1                    'Add rotation bit state.
   End If
   Return

   End
 
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