Changing declared variables names on the fly

[jessey]

Hello Sayzer,

Thanks for your code example, I like the way the IncrFlag and the DecrFlag variables work in that you don't have to set it back to 0 and just use "IF DecrFlag THEN", that's cool. I tried your code and it didn't work as posted, in order to save the OnTime & OffTime I had to place Index.0=OffTime & Index.1=OnTime before the write then it would save ok. Another thing I had to do in order to save the on/off times was to change the FOR-NEXT loop from 1 - 10 to 0 - 1 then it saved?

You and Steve say that EEPROM or DATA will work at Programming time and you have EEPROM 1,[1,2,3,4,5,6,7,8,9,10,101,102,103,104,105,106,107,1 08,109,110] but when I program the code then OnTime shows 2 and OffTime shows 255. As far as I can figure location 1 is OnTime and when I replace 1 in the above EEPROM statement with 8 then after programming then OnTime dose show 8 but I can't figure out how to get address 101 to show anything but 255 using the EEPROM?

Am I correct in placing Index.1 and Index.0 before the write and if so how would I write to all the other addresses? I've been playing around with the code and can't seem to get it working properly. I'd like to be able to add additional subroutines to program additional on off times.

Thanks
jessey

EEPROM 1,[8,2,10,11,12,6,7,8,9,10,101,102,103,104,105,106,107,108,109,110]
'Keep this command at the first line.
'this will run only one time during the programming.
'not each time you power your PIC.
'These are your initial default values.


Increase_OnTime_Push_Button     VAR PORTD.2 '(pin 21)  2nd  
Decrease_OnTime_Push_Button     VAR PORTB.0 '(pin 33)  3rd  
Increase_OffTime_Push_Button    VAR PORTB.1 '(pin 34)  4th                 
Decrease_OffTime_Push_Button    VAR PORTB.2 '(pin 20)  5th  
Change_Times_Push_Button  VAR PORTD.1       '(pin 35)  6th  
Led                             VAR PORTA.1 '(pin 3)
Buzzer                          VAR PORTC.2 '(pin 17)
IncrFlag VAR BIT
DecrFlag VAR BIT
IncrFlag = 0 '0 =  button is NOT pressed. 1= button is pressed.
DecrFlag = 0

OnTime  VAR byte
OffTime VAR byte
Index   VAR byte
Hour    VAR byte
HOUR = 0

Is_Pressed      CON 0
Is_Not_Pressed  CON 1
      
 
GOTO MainLoop

Change_Times:
    GOSUB buzz
    WHILE Change_Times_Push_Button = Is_Pressed : PAUSE 100 : WEND
Loop:

    IF Increase_OnTime_Push_Button = Is_Pressed THEN
       GOSUB buzz : IncrFlag = 1 : OnTime = OnTime + 1
    ENDIF

    IF Decrease_OnTime_Push_Button = Is_Pressed THEN
       GOSUB buzz : IncrFlag = 1 : OnTime = OnTime - 1
    ENDIF
                                   
    IF Increase_OffTime_Push_Button = Is_Pressed THEN
       GOSUB buzz : DecrFlag = 1 : OffTime = OffTime + 1 
    ENDIF

    IF Decrease_OffTime_Push_Button = Is_Pressed THEN
       GOSUB buzz : DecrFlag = 1 : OffTime = OffTime - 1 
    ENDIF

    IF Change_Times_Push_Button = Is_Pressed THEN
      gosub buzz 
      IF IncrFlag THEN  
         Index.1=OnTime : WRITE 1,OnTime
      ENDIF       
      IF DecrFlag THEN 
         Index.0=OffTime : WRITE 101,OffTime
      ENDIF   
      WHILE Change_Times_Push_Button = Is_Pressed : PAUSE 100 :WEND
      GOTO MainLoop
    ENDIF

    LCDOUT $fe,1,   "OnTime  = ",dec Ontime
    LCDOUT $fe, $c0,"OffTime = ",dec OffTime 
    PAUSE 100

GOTO Loop


MainLoop:
    IF Change_Times_Push_Button = Is_Pressed THEN goto Change_Times

    IF Increase_OnTime_Push_Button = Is_Pressed THEN 
       GOSUB buzz : Hour = Hour + 1
    ENDIF

    IF Decrease_OnTime_Push_Button = Is_Pressed THEN
       GOSUB buzz : Hour = Hour - 1 
    ENDIF

    FOR Index = 0 to 1
        READ Index , OnTime            ' Read stored ON  time.
        READ Index +100, OffTime       ' Read stored OFF time.
        IF Hour = Ontime  THEN Led = 1 ' If yes, turn ON the relay.
        IF Hour = Offtime THEN Led = 0 ' If yes, turn OFF the relay.
    NEXT Index 

    LCDOUT $fe,1,   "Hr=",dec Hour," OnTime=",DEC Ontime
    LCDOUT $fe, $c0,"OffTime = ",DEC OffTime

    PAUSE 100
    

GOTO MainLoop     


Buzz:
     PWM Buzzer,250,1
     RETURN

END

[sayzer]

Jessey,

I think you are thinking about FOR loop in a different way.
Index variable is not an array variable.

So you need to go back to using FOR Index=1 TO 10.


Also, Index.1=OnTime and Index.0=OffTime do nothing in the code for you.
You are, I think, confusing with Arrays here.

Can you be more specific about your idea?
May be I got it not good enough.

--------------------------------

[jessey]

Hi Sayzer,

Well I'm finally getting somewhere, I was way off track in my thinking but I think I'm getting closer now. This code works but I still have a few questions for you.

In this code below that I wrote, I had to change the "READ Index +100, OffTime" to "READ Index +10, OffTime" when using the "EEPROM 1,[1,3,5....]" statement to get the OffTimes to display to the Lcd which makes sense because I only have 10 OnTimes and 10 OffTimes but when I don't use the "EEPROM 1,[1,3,5....]" statement and just set and save the different times to the eeprom then I have to use "READ Index +100, OffTime" in order to make it work otherwise my OffTimes will show 255 and won't change? Why is that?

Another question, what does the EEPROM 1, in the "EEPROM 1,[1,3,5....]" statement make reference to. Can I have multiple eerpom statements like "EEPROM 1,[1,3,5....]", "EEPROM 2,[1,3,5....]", "EEPROM 3,[1,3,5....]" ect. ect, for different sets of variables?

'18f452 pic 

Decrease_Hour_Push_Button   VAR PORTB.7  
Increase_Hour_Push_Button VAR PORTD.2 

OnTime  var byte
OffTime var byte
Index   var byte
Hour    var byte
Hour = 0

EEPROM 1,[1,3,5,7,9,11,13,15,17,19,2,4,6,8,10,12,14,16,18,20]

'--------------------------------------------------------'
EEPROMData1 var BYTE
Timer_1_OnTime VAR EEPROMData1     'alias for eepromdata 1
READ 1, EEPROMData1 
' To write to the EEPROM 
' ===================== 
'Timer_1_OnTime = 1     
'EEPROMData1 = Timer_1_OnTime 
'Write 1, EEPROMData1    
'--------------------------------------------------------'
EEPROMData2 var BYTE
Timer_2_OnTime VAR EEPROMData2     'alias for eepromdata 2
READ 2, EEPROMData2 
' To write to the EPROM 
' =====================
'Timer_2_OnTime = 3     
'EEPROMData2 = Timer_2_OnTime 
'Write 2, EEPROMData2     
'--------------------------------------------------------'
EEPROMData3 var BYTE
Timer_3_OnTime VAR EEPROMData3     'alias for eepromdata 3
READ 3, EEPROMData3 
' To write to the EPROM 
' ===================== 
'Timer_3_OnTime = 5     
'EEPROMData3 = Timer_3_OnTime 
'Write 3, EEPROMData3    
'--------------------------------------------------------'
EEPROMData4 var BYTE
Timer_4_OnTime VAR EEPROMData4     'alias for eepromdata 4
READ 4, EEPROMData4 
' To write to the EPROM 
' =====================
'Timer_4_OnTime = 7     
'EEPROMData4 = Timer_4_OnTime 
'Write 4, EEPROMData4     
'--------------------------------------------------------'
EEPROMData5 var BYTE
Timer_5_OnTime VAR EEPROMData5     'alias for eepromdata 5
READ 5, EEPROMData5 
' To write to the EPROM 
' =====================
'Timer_5_OnTime = 9     
'EEPROMData5 = Timer_5_OnTime 
'Write 5, EEPROMData5     
'--------------------------------------------------------'
EEPROMData6 var BYTE
Timer_6_OnTime VAR EEPROMData6     'alias for eepromdata 6
READ 6, EEPROMData6 
' To write to the EPROM 
' ===================== 
'Timer_6_OnTime = 11    
'EEPROMData6 = Timer_6_OnTime 
'Write 6, EEPROMData6     
'--------------------------------------------------------'
EEPROMData7 var BYTE
Timer_7_OnTime VAR EEPROMData7     'alias for eepromdata 7
READ 7, EEPROMData7 
' To write to the EPROM 
' =====================
'Timer_7_OnTime = 13    
'EEPROMData7 = Timer_7_OnTime 
'Write 7, EEPROMData7      
'--------------------------------------------------------'
EEPROMData8 var BYTE
Timer_8_OnTime VAR EEPROMData8     'alias for eepromdata 8
READ 8, EEPROMData8 
' To write to the EPROM 
' ===================== 
'Timer_8_OnTime = 15    
'EEPROMData8 = Timer_8_OnTime 
'Write 8, EEPROMData8     
'---------------------------------------------------------'
EEPROMData9 var BYTE
Timer_9_OnTime VAR EEPROMData9     'alias for eepromdata 9
READ 9, EEPROMData9 
' To write to the EPROM 
' ===================== 
'Timer_9_OnTime = 17
'EEPROMData9 = Timer_9_OnTime 
'Write 9, EEPROMData9         
'---------------------------------------------------------'
EEPROMData10 var BYTE
Timer_10_OnTime VAR EEPROMData10   'alias for eepromdata 10
READ 10, EEPROMData10 
' To write to the EPROM 
' =====================
'Timer_10_OnTime = 19   
'EEPROMData10 = Timer_10_OnTime 
'Write 10, EEPROMData10       
'-----------------------------------------------------------'


'-----------------------------------------------------------'
EEPROMData101 var BYTE
Timer_101_OffTime VAR EEPROMData101'alias for eepromdata 101
READ 101, EEPROMData101 
' To write to the EPROM 
' =====================
'Timer_101_OffTime = 2  
'EEPROMData101 = Timer_101_OffTime 
'Write 101, EEPROMData101         
'-----------------------------------------------------------'
EEPROMData102 var BYTE
Timer_102_OffTime VAR EEPROMData102'alias for eepromdata 102
READ 102, EEPROMData102 
' To write to the EPROM 
' =====================
'Timer_102_OffTime = 4  
'EEPROMData102 = Timer_102_OffTime 
'Write 102, EEPROMData102         
'-----------------------------------------------------------'
EEPROMData103 var BYTE
Timer_103_OffTime VAR EEPROMData103'alias for eepromdata 103
READ 103, EEPROMData103 
' To write to the EPROM 
' =====================
'Timer_103_OffTime = 6  
'EEPROMData103 = Timer_103_OffTime 
'Write 103, EEPROMData103         
'-----------------------------------------------------------'
EEPROMData104 var BYTE
Timer_104_OffTime VAR EEPROMData104'alias for eepromdata 104
READ 104, EEPROMData104 
' To write to the EPROM 
' =====================
'Timer_104_OffTime = 8 
'EEPROMData104 = Timer_104_OffTime 
'Write 104, EEPROMData104         
'-----------------------------------------------------------'
EEPROMData105 var BYTE
Timer_105_OffTime VAR EEPROMData105'alias for eepromdata 105
READ 105, EEPROMData105 
' To write to the EPROM 
' ===================== 
'Timer_105_OffTime = 10 
'EEPROMData105 = Timer_105_OffTime 
'Write 105, EEPROMData105         
'-----------------------------------------------------------'
EEPROMData106 var BYTE
Timer_106_OffTime VAR EEPROMData106'alias for eepromdata 106
READ 106, EEPROMData106 
' To write to the EPROM 
' =====================
'Timer_106_OffTime = 12 
'EEPROMData106 = Timer_106_OffTime 
'Write 106, EEPROMData106          
'-----------------------------------------------------------'
EEPROMData107 var BYTE
Timer_107_OffTime VAR EEPROMData107'alias for eepromdata 107
READ 107, EEPROMData107 
' To write to the EPROM 
' =====================
'Timer_107_OffTime =14  
'EEPROMData107 = Timer_107_OffTime 
'Write 107, EEPROMData107         
'-----------------------------------------------------------'
EEPROMData108 var BYTE
Timer_108_OffTime VAR EEPROMData108'alias for eepromdata 108
READ 108, EEPROMData108 
' To write to the EPROM 
' =====================
'Timer_108_OffTime = 16 
'EEPROMData108 = Timer_108_OffTime 
'Write 108, EEPROMData108          
'-----------------------------------------------------------'
EEPROMData109 var BYTE
Timer_109_OffTime VAR EEPROMData109'alias for eepromdata 109
READ 109, EEPROMData109 
' To write to the EPROM 
' ===================== 
'Timer_109_OffTime = 18 
'EEPROMData109 = Timer_109_OffTime 
'Write 109, EEPROMData109         
'-----------------------------------------------------------'
EEPROMData110 var BYTE
Timer_110_OffTime VAR EEPROMData110'alias for eepromdata 110
READ 110, EEPROMData110 
' To write to the EPROM 
' =====================
'Timer_110_OffTime = 20 
'EEPROMData110 = Timer_110_OffTime 
'Write 110, EEPROMData110          
'----------------------------------------------------------'

Is_Pressed CON 0 


      GOTO mainloop

Sound_Buzzer:
      PWM Buzzer,250,1
RETURN
     

MainLoop:

 FOR Index = 1 to 10
    IF Increase_Hour_Push_Button = Is_Pressed THEN 
       GOSUB Sound_Buzzer : Hour = Hour + 1
    ENDIF

    IF Decrease_Hour_Push_Button = Is_Pressed THEN
       GOSUB Sound_Buzzer : Hour = Hour - 1 
    ENDIF

    LCDOUT $fe,1,   "Hr=",dec Hour," OnTime=",DEC Ontime
    LCDOUT $fe, $c0,"OffTime = ",DEC OffTime

        READ Index , OnTime       'Read stored ON  time.
        READ Index +10, OffTime  'Read stored OFF time.
        IF Hour = Ontime  THEN Led = 1 'turn ON the Led.
        IF Hour = Offtime THEN Led = 0 'turn OFF the Led.

    PAUSE 500 

 NEXT Index 

 GOTO mainloop
END

Here is one of the segments of code that I'd like to change in an attachment here if you want to see what I'm trying to accomplish.This code uses 1404 bytes in my program and I thought I could use your example code to save some code space for this part and if it works out then I can save a lot in other parts of my program as well.

Thanks
jessey

[Dave]

jessey, This should save you a few bytes......

_On con 1
COUNTER VAR BYTE
Timer_Is var byte[13]
Clock_Mode var byte
On_Am_Pm_Mode VAR BYTE[13]
Hours VAR BYTE
On_Timer_Hour VAR BYTE[13]
Minutes VAR BYTE
On_Timer_Min VAR BYTE[13]
Seconds VAR BYTE
On_Timer_Sec VAR BYTE[13]


Check_The_Timers_Relay: 'this code uses 1404 bytes
COUNTER = 1
WHILE COUNTER < 13 'LOOP 12 TIMES
IF Timer_Is(COUNTER) = _On then
IF Clock_Mode = On_Am_Pm_Mode(COUNTER) THEN ' this checks the am/pm mode for on Timer
IF Hours = On_Timer_Hour(COUNTER) THEN
IF Minutes = On_Timer_Min(COUNTER) then
IF Seconds = On_Timer_Sec(COUNTER) THEN
GOSUB Turn_On_The_Relay
ENDIF
ENDIF
ENDIF
endif
IF Clock_Mode = Off_Am_Pm_Mode(COUNTER) THEN
IF Hours = Off_Timer_Hour(COUNTER) THEN
IF Minutes = Off_Timer_Min(COUNTER) then
IF Seconds = Off_Timer_Sec(COUNTER) THEN
GOSUB Turn_Off_The_Relay
ENDIF
ENDIF
ENDIF
endif
ENDIF
COUNTER = COUNTER + 1
WEND
RETURN

Dave Purola,
N8NTA

[jessey]

Hi Dave,

I'm not familiar with "var byte[13]" or how it works but I'd really like to understand it as I would Sayzer's code example, I have a real thirst to learn PBP and this forum is a great opportunity for me.

The attachment shows all of the variables for one timer and all the necessary subroutines that are shared by all of the 12 timers except for some sub's that are used to select prints to show to the Lcd and a repeat On/Off timer. The Set_Timer_1: subroutine is repeated 11 more times and they all share the same sub's in the attachment, that'll give you a good idea of what I'm working on. If you have the time to explain the process using "var byte[13]", maybe something simple that'll flash an Led or just some theory then I'd love to see it.

Thanks
jessey

[sayzer]

Jessey,

Check these and see how array works.
http://www.picbasic.co.uk/forum/showthread.php?t=544
http://www.picbasic.co.uk/forum/showthread.php?t=3753

Then have your questions either in those posts or here.

[jessey]

Hi Sayzer,

Yes I found Melanie's thread a while back and I even wrote a short simple program to try and understand it better. I got the program to turn on an led whenever the bits equaled 1 and to shut it off when 0 and with the press of a button the sequence changes but I couldn't figure an application for it in any of my programs. I'd still be interested in hearing Dave's concept as it seems he can see an application that's beyond my comprehension and I'm eager to learn that.

Thanks for your explanation of the eepron and it does make sense to me for that part now. I did read the manual but couldn't make any real sense of it. This is just a hobby for me, I haven't had any courses or schooling on programming or electronics so I take it slowly. Now that I'm semi retired I've started to spend more time with electronics and programming and I find it very rewarding.

Thanks for your help and the links
jessey

Select_Push_Button   VAR PORTB.7          '(pin 40)  1st
Hours_Push_Button VAR PORTD.2             '(pin 21)  2nd  
Minutes_Push_Button var PORTB.0           '(pin 33)  3rd  
Seconds_Push_Button var PORTB.1           '(pin 34)  4th                 
Toggle_Push_Button var PORTB.2            '(pin 35)  5th 


A VAR BYTE
A = 0
MyWord var word
MyWord = %1010101010101010
MyByte Var word
MyVar var word
MyBit var BIT
Reference_Word  VAR WORD
Reference_Word1 VAR WORD
Reference_Word2 VAR WORD
Reference_Word3 VAR WORD
Reference_Word  = 1010
Reference_Word1 = 1010
Reference_Word2 = 1010
Reference_Word3 = 1010
Is_Pressed CON 0


      GOTO mainloop

Sound_Buzzer:
      PWM Buzzer,250,1
RETURN

PAUSE_100:
      PAUSE 100
RETURN     


 mainloop:
 Show_Print:
 For MyVar=0 to 15
   MyBit=MyWord.0(MyVar)
   LCDOut $FE,1,"Bit ",DEC MyVar,"=",DEC MyBit
   LCDOut $fe,$c0,$fe,$0e,dec Reference_Word,DEC Reference_Word1, _
                     DEC Reference_Word2,DEC Reference_Word3
   if a = 1 then Return_To_Push_Button_1
   if a = 2 then Return_To_Push_Button_2
   if a = 3 then Return_To_Push_Button_3
   if a = 4 then Return_To_Push_Button_4
   if a = 5 then Return_To_Push_Button_5
   IF MyBit = 1 then
    HIGH LED
    PAUSE 1000             
   ELSE
    LOW LED
    PAUSE 1000
   ENDIF

   IF Select_Push_Button = Is_Pressed then ' #1 
    GOSUB Sound_Buzzer : A = 1  
    MyWord = %1100110011001100
    Reference_Word  = 1100
    Reference_Word1 = 1100
    Reference_Word2 = 1100
    Reference_Word3 = 1100
    MyVar = 0
    IF A = 1 THEN Show_Print
    Return_To_Puch_Button_1:
    A = 0
    WHILE Select_Push_Button = Is_Pressed : GOSUB PAUSE_100 : WEND
    IF MyVar = 0 THEN MAINLOOP
   ENDIF

   IF Hours_Push_Button = Is_Pressed then ' #2
    GOSUB Sound_Buzzer : A = 2  
    MyWord = %1110111011101110
    Reference_Word  = 1110
    Reference_Word1 = 1110
    Reference_Word2 = 1110
    Reference_Word3 = 1110
    MyVar = 0
    IF A = 2 THEN Show_Print
    Return_To_Puch_Button_2:
    A = 0
    WHILE Hours_Push_Button = Is_Pressed : GOSUB PAUSE_100 : WEND
    IF MyVar = 0 THEN MAINLOOP
   ENDIF

   IF Minutes_Push_Button = Is_Pressed then ' #3
    GOSUB Sound_Buzzer : A = 3 
    MyWord = %1101101111001001
    Reference_Word  = 1101
    Reference_Word1 = 1011
    Reference_Word2 = 1100
    Reference_Word3 = 1001
    MyVar = 0
    IF A = 3 THEN Show_Print
    Return_To_Puch_Button_3:
    A = 0
    WHILE Minutes_Push_Button = Is_Pressed : GOSUB PAUSE_100 : WEND
    IF MyVar = 0 THEN MAINLOOP
   ENDIF
    
   IF Seconds_Push_Button = Is_Pressed then ' #4
    GOSUB Sound_Buzzer : A = 4  
    MyWord = %1010100110101001
    Reference_Word  = 1010
    Reference_Word1 = 1001
    Reference_Word2 = 1010
    Reference_Word3 = 1001
    MyVar = 0
    IF A = 4 THEN Show_Print
    Return_To_Puch_Button_4:
    A = 0
    WHILE Seconds_Push_Button = Is_Pressed : GOSUB PAUSE_100 : WEND
    IF MyVar = 0 THEN MAINLOOP
   ENDIF

   IF Toggle_Push_Button = Is_Pressed then ' #5 
    GOSUB Sound_Buzzer : A = 5 
    MyWord = %1111101110101101 
    Reference_Word  = 1111
    Reference_Word1 = 1011
    Reference_Word2 = 1010
    Reference_Word3 = 1101
    MyVar = 0
    IF A = 5 THEN Show_Print
    Return_To_Puch_Button_5:
    A = 0
    WHILE Toggle_Push_Button = Is_Pressed : GOSUB PAUSE_100 : WEND
    IF MyVar = 0 THEN MAINLOOP
   ENDIF 
 Next MyVar

 GOTO mainloop
 end

[sayzer]

.....
Another question, what does the EEPROM 1, in the "EEPROM 1,[1,3,5....]" statement make reference to. Can I have multiple eerpom statements like "EEPROM 1,[1,3,5....]", "EEPROM 2,[1,3,5....]", "EEPROM 3,[1,3,5....]" ect. ect, for different sets of variables?.....

Jessey,

I did not take look at your code now but for your EEPROM question, here is the key.

If you look at the help file or the manual etc..., you will understand the followings.

Example:
EEPROM 1,[1,3,5,7,9,11,$C0,"A",%10100101]
1 is the start address for EEPROM location.
This command will do the following.

Store value 1 on Location 1
Store value 3 on Location 2
Store value 5 on Location 3.
Store value 7 on Location 4.
Store value 9 on Location 5.
Store value 11 on Location 6.
Store value $C0 on Location 7.
Store value "A" on Location 8.
Store value %10100101 on Location 9.


Therefore, once you start from a location on epprom to store some values, then you can not cross that address range by another eeprom command.

Example:
EEPROM 5,["A","B","C","D"]

This will store "A" , "B" , "C" , and "D" on epprom locations 5,6,7,and 8 respectively. This way, you are having locations from 5 to 8 reserved by this epprom command.

Then if you have another EEPROM command like EEPROM 3,[90,100,25,70] then this epprom command will try to write on locations 3,4,5, and 6.

Now, you get two EEPROM commands trying to write on same locations at 5 and 6.

Thus, you get a collision in EEPROM. You will need to change the location in one of these eeprom commands.

As long as you have no collision, you are free to use the given space by your epprom with multiple epprom commands.



Is it clear now?


------------