URXC Interrupt löscht Variablen???
Ich habe folgenden Code:
Code:
'-------------------------------------------------------------------------------
' Filename : QuadrDec_1.0.bas
' Purpose : Quadrature Decoder/Counter and Display
' Author : Ger langezaal
' Date : 5 April 2002
' Compiler : BASCOM-AVR Rev. 1.11.6.5
'
'-------------------------------------------------------------------------------
'
' Algorithm:
' Interrupt on both edges of phase A
' Test phase B in ISR
' When phase B <> phase A then decrement counter
' When phase B = phase A then increment counter
' Convert counter value to displacment units
' Format value in string and display
'
'-------------------------------------------------------------------------------
'
' Setup for AT90S2313-10
'
' INT0 edge is set to rising edge
' INT1 edge is set to falling edge
' Encoder phase A to INT0 and INT1 (PD2 and PD3)
' Encoder phase B to PD4
' Pushbutton between Portd.5 and GND (display zero)
' LCD at PortB
'
' Example for PROXXON KT150 XY table:
' Displacement/rev = 2 mm
' Encoder resolution = 20 pulses/rev
' Interrupt on both pulse edges = 40 interrupts/rev
' Dial resolution: 2 mm / 40 = 0.05 mm
' The optical encoder came from a used mouse (two available)
'
'-------------------------------------------------------------------------------
'
' Options/Compiler/Chip:
' HW Stack 48
' Soft Stack 8
' Framesize 16
'
'-------------------------------------------------------------------------------
'
$regfile = "m32def.dat"
$crystal = 16000000 '10 MHz
$baud = 9600
Dim Axis_raw As Integer 'optical pulse counter
Dim Axis_save As Eram Integer 'counter in eeprom
Dim I As Byte 'helpvar for udr
Dim Stopp As Bit
Dim Sending As Bit
Config Portd = Input
Portd = 255 'enable Portd pullup's
Phase_a Alias Pind.2 'INT0 also connected to Pind.3 = INT1
Phase_b Alias Pind.6
'---[ Set Interrupt logic ]-----------------------------------------------------
Mcucr = &B00001011 'set interrupt edges
On Int0 Phase_a_edge 'ISR on rising edge
On Int1 Phase_a_edge 'ISR on falling edge
On Urxc Communication
Enable Int0
Enable Int1
Enable Urxc
Enable Interrupts
'---[ Initialization ]----------------------------------------------------------
Stopp = 0
Axis_raw = 0
Sending = 1
If Axis_raw <> Axis_save Then
' Axis_raw = Axis_save
End If
'---[ Main program loop ]-------------------------------------------------------
Do
If Sending = 1 Then Print "{" ; Axis_raw ; "}";
Waitms 100
Loop
'-------------------------------------------------------------------------------
End
'---[ Interrupt Service Routine ]-----------------------------------------------
Phase_a_edge: 'Interrupt on rising and falling edge
If Phase_b <> Phase_a Then 'test phase B
Decr Axis_raw 'CCW
Else
Incr Axis_raw 'CW
End If
If Stopp = 0 Then
If Axis_raw =< 0 Then
Print "!"
Stopp = 1
End If
End If
If Stopp = 1 Then If Axis_raw > 0 Then Stopp = 0
Return
Communication:
I = Udr
If Chr(i) = "#" Then Axis_raw = 0
If Chr(i) = "$" Then Axis_save = Axis_raw
If Chr(i) = "^" Then Sending = 1
If Chr(i) = "°" Then Sending = 0
Return
'-------------------------------------------------------------------------------
Sobald ich nu etwas an den Chip sende wird die variable Axis_raw auf 0 gesetzt. Die IF Abfragen werden ignoriert.
Was stimmt da nicht?
Mfg
Tobi
