Nested For Next Loop Demo

Some of you will find this useful especially when sorting bytes for a scrolling matrix or GLcd.
The only "secret" here is the innermost loop has to execute first and the first must finish last.

Code:

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'****************************************************************
'*  Name    : Nested ForNextDemo.BAS                            *
'*  Author  : [Joe S.    ]                                      *
'*  Notice  : Copyright (c) 2009 [                    ]        *
'*          : All Rights Reserved                              *
'*  Date    : 6/7/2009                                          *
'*  Version : 1.0                                              *
'*  Notes  :MPASM Assembler, PIC 16F690                        *
'*          :                                                  *
'****************************************************************

@ __config _INTOSCIO & _WDT_ON & _PWRTE_ON & _MCLRE_ON  & _CP_OFF

DEFINE OSC 4
include "modedefs.bas"
ANSEL  = 0
ANSELH  = 0
CM1CON0 = 0
CM2CON0 = 0


index  var byte
index2 var byte
index3 var byte

value var byte
value2 var byte
value3 var word

array var byte[6]


pause 50
serout PortB.7,T2400,[254,1] 'Cleasr LCD
serout PortB.7,T2400,[254,2,"Nested For Next Demo"]
pause 1000
serout PortB.7,T2400,[254,1] 'Cleasr LCD                           
loop:
Value  = 0
Value2 = 0
Value3 = 0                        ' Perform for next counters nested 3 levels deep

for index = 1 to 10 step 1    ' Do whole routine 10 times, count
 
                lookup index,[0,"0123456789"],value
                pause 1
                serout PortB.7,T2400,[$FE,2,"value  ",value]
               
            for index2 = 1 to 8  step 1        'do this count 8 times in each of the 10 loops
                        lookup index2,[0,"0123456789"],value2
                        pause 1
                        serout PortB.7,T2400,[254,$C0,"value2 ",value2]
                       
                       
                                for index3 = 1 to 5 step 1  'do this 5 times in each of the 80 loops
                                      lookup index3,[0,"0123456789"],value3
                                      pause 2
                                      serout PortB.7,T2400,[254,$94,"value3 ",value3]
                                      pause 100 ' this delay gives you time to see the numbers change
                                                ' increase this to slow counters
                                next index3 ' this next goes first as it was the last to start
                               
           
            next index2  ' started in the middle, it stays in the middle
           
next index              ' "the first will be last and the last will be first" . . . God.

index = 0
for index = 0 to 5                'Index is the pointer used in the array and the counter
            array[index] = index + 48 'convert to ASCII & write zero to 5 into index and transfer ASCII to array
            serout PortB.7,t2400,[254,$D4,"array is ",array[index]]  'read from array and display on line 4
            pause 500
next index

serout PortB.7,T2400,[254,1] 'Cleasr LCD
goto loop ' do for as long as there is power

end

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