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Complex flashing LED

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An LED is connected to one of the port pins of a PIC microcontroller. The
LED is flashed continuously as in the following sequence:

3 flashes with 250ms interval between each flash.
2 s delay.
3 flashes with 250ms interval between each flash.


‘********************************************************************
‘
‘                           LED FLASHING PROGRAM
‘                           ======================
‘
‘ This program flashes an LED connected to port RB0 of PORTB. The
‘ LED is flashed continuously as follows:
‘
‘             Flash 3 times with 250ms intervals
‘             Wait 2 seconds
‘             Flash 3 times with 250ms intervals
‘             .................................................
‘             .................................................
‘
‘
‘ Author:          Dogan Ibrahim
‘ Date:              October, 2005
‘ Compiler:      PicBasic
‘ File:               LED3.BAS
‘
‘ Modifications
‘ ==========
‘
‘********************************************************************
‘
‘ SYMBOLS
‘
Symbol LED     0                                                           ‘ Define RB0 as LED Symbol TRISB     $86                                                    ‘ TRISB address Symbol PORTB     $06                                                   ‘ PORTB address
‘
‘ VARIABLES
‘
Symbol Cnt     B0                                                           ‘ Declare Cnt as a byte
‘
‘ START OF MAIN PROGRAM
‘


AGAIN:

POKE TRISB, 0                                              ‘ Set PORTB pins as outputs

FOR Cnt     1 TO 3
HIGH LED                                                 ‘ Turn ON LED PAUSE 250                                                 ‘ Wait 250ms LOW LED                                                  ‘ Turn OFF LED PAUSE 250                                                 ‘ Wait 250ms
NEXT Cnt

PAUSE 2000                                                    ‘ Wait 2 seconds

GOTO AGAIN                                                ‘ Repeat

END                                                                 ‘ End of program





‘********************************************************************
‘
‘                           LED FLASHING PROGRAM
‘                           ======================
‘
‘ This program flashes an LED connected to port RB0 of PORTB. The
‘ LED is flashed continuously as follows:
‘
‘             Flash 3 times with 250ms intervals
‘             Wait 2 seconds
‘             Flash 3 times with 250ms intervals
‘             .................................................
‘             .................................................
‘
‘
‘ Author:          Dogan Ibrahim
‘ Date:              October, 2005
‘ Compiler:      PicBasic Pro
‘ File:               LED4.BAS
‘
‘ Modifications
‘ ==========
‘
‘********************************************************************
‘
‘
‘ DEFINITIONS
‘
Cnt    VAR    BYTE                                                          ‘ Declare Cnt as a byte
‘
‘ START OF MAIN PROGRAM
‘
TRISB     0                                                                ‘ Set PORTB pins as outputs
AGAIN:
FOR Cnt     1 TO 3
PORTB.0     1                                                     ‘ Turn ON LED PAUSE 250                                                         ‘ Wait 250ms PORTB.0     0                                                     ‘ Turn OFF LED PAUSE 250                                                         ‘ Wait 250ms
NEXT Cnt
PAUSE 2000                                                              ‘ Wait 2 seconds
GOTO AGAIN                                                           ‘ Repeat
END                                                                           ‘ End of program


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