timer2.bas

82 sample programs written in BASCOM-8051 for 8051 developement

'--------------------------------------------------------------
'                     (c) 1997-2000 MCS Electronics
'--------------------------------------------------------------
'  Note  : BETA-status
'  file: TIMER2.BAS
'  demo: Capture mode of TIMER2
'  *TIMER1 is used for RS-232 baudrate generator
'  Select 8052.dat or 89s8252.dat !!!
'--------------------------------------------------------------
Dim Count As Byte , Gt As Byte , I As Word

Config Timer2 = Timer , Gate = External , Mode = 1
'Timer2 = timer   : timer 2 operates as a counter
'Gate = External  : a 1 to 0 transition on T2EX will capture the timer registers
'Mode = 1         : capture mode

Counter2 = 0                            'reset timer2

On Timer2 Timer_2_int
Enable Interrupts                       'enable the use of interrupts
Enable Timer2                           'enable the timer


Rem Setting Of Priority
Priority Set Timer2                     'highest priority
Start Timer2                            'start the timer

Count = 0                               'reset counter
Do
  Input "Number " , Gt
  Print "You entered : " ; Gt
Loop Until Gt = 1                       'loop until users presses ESC key
Stop Timer2
End


Rem The Interrupt Handler For The Timer2 Interrupt
Timer_2_int:
   If T2con.6 = 1 Then                  'caues by a transition
      I = Capture                       'get value from capture register
      Print I
   Else                                 'must be an overflow
      Print "overflow"
   End If
Return