Changing declared variables names on the fly

Hello,

This is probably a dumb question but is there a way using PBP to have a variable with-in a declared variable name? Its a little hard to explain exactly what I mean but it would be sort of like this:

You want to print a variable name to your Lcd so you print:
LCDOUT $FE,1,"On_Timer_Hour",DEC M," "

the On_Timer_Hour would be your declared variable and the variable with-in it would be the M variable. Setting the M variable before the print to the Lcd (or in your code) would change the variable name displayed to the Lcd. So the variable On_Timer_Hour could be On_Timer_Hour1, On_Timer_Hour2, On_Timer_Hour3 ect. ect.. It would be great if I could implement that concept in my code. Wishful thinking?

Why I'm asking is: I'm writing a timer program where the user can programme 10 different On and Off times that repeats every 24 hours using Darrels ELASPED.PBP. I have in excess of 100 variables that all have a numerical value at the end of the variable name. If it is possible to use a variable with-in a declared variable name then it would save a lot of code space.

In each of the 10 timer sections (I'd like to have more if I can gain more code space) I have intermediate dummy variables that all have to be set then re-set to implement my code. It would be great if I could just change one M variable that would change them all. There's a lot I don't understand about programming, like array variables with a variable index or other concepts that could make writing code more efficient. What is the concept of a variable index? Would that have anything to with what I'm trying to accomplish here?

Is it possible or just wishful thinking.

Thanks
jessey

Hi Jessey,

It seems you really need to use array.

Since you need 10 different ON times and 10 different OFF times, 20 variables would give you a lot of headache if not using array.

But, if I got it right, then a simple code as below could be the idea for you, may be.

Code:

EEPROM 1,[1,2,3,4,5,6,7,8,9,10,101,102,103,104,105,106,107,108,109,110] 'Say these are your stored alarm time(s). '1 to 10 : ON time '101 to 110 : OFF time OnTime var byte OffTime var byte Index var byte Hour var byte Alarm var PORTB.0 'A relay is connected here to wake you up! 'Hour variable gets its value from RTC routine somewhere in the code.... Start: FOR Index = 1 to 10 READ Index , OnTime 'Read stored ON time. READ Index +100, OffTime 'Read stored OFF time. IF Hour = Ontime THEN ALARM = 1 'Check if there is a match with the current time. If yes, turn ON the relay. IF Hour = Offtime THEN Alarm = 0 'Check if there is a match with the current time. If yes, turn OFF the relay. NEXT Index GOTO Start

Hour variable is just an example. Assuming you get your hour variable somewhere in the code. It could be the minute, the second, the day, year etc... or all of them together.

Say you stored the "Alarm ON" time in the eeprom location 1. Then its corresponding "Alarm OFF" time should be stored in a sequenced number, for example +100, 101.

This way you can have an array to make more and more variables to match. Use a simple code as above first to start understanding the idea.

How do I READ & WRITE to the EEPROM 1, [1,2,3......]

Hello Sayzer,

Thanks for answering my question. Forgive my ignorance but I'm not familiar with your code example or how to implement it. I am familiar with how to read & write to the eeprom, for a byte variable I use

EEPROMData0 VAR BYTE
U VAR EEPROMData0
READ 0, EEPROMData0

to write I use:
EEPROMData0 = U
Write 0, EEPROMData0

then for a word variable I use

EEPROMData1 VAR WORD
V VAR EEPROMData1
Read 1, EEPROMData1.byte0
Read 2, EEPROMData1.byte1

to write I use:
Write 1, EEPROMData1.byte0
Write 2, EEPROMData1.byte1

In your example code I don't know how I would write to locations 1 to 10 and 101 to 110 of the eeprom address location 1? Could you please explain the concept as I'm not sure how to do that. I can sorta understand your Index loop but I don't see any relationship between the Index variable and the EEPROM 1, [1,2,3......] statement? I've seen the EEPROM 1, [1,2,3......] statements in some of the code examples in the archives but I just don't understand the concept.

Could you educate me about how this works?

Thanks
jessey

Quote:

Originally Posted by jessey

...locations 1 to 10 and 101 to 110 of the eeprom address location 1?..
jessey

1, 10 or 101 or 110 these are all already EEPROM locations. So there is no access to "10 of location 1". 10 is the location.

For the index example,

when index=1, take a look at the following code.

READ Index , OnTime
READ Index+100, OffTime

Lest put "1" in index variable and re-write these two lines again.

READ 1, OnTime
READ 1 + 100, OffTime

Now, the third time, this will become as follows.

READ 1, OnTime
READ 101, OffTime

With these two lines, you will read EEPROM location 1 and store the location content in Ontime variable. And, read EEPROM location 101 and store the location content into OffTime variable.

Now, you can take a look at FOR loop above and think about incrementing index variable. When index variable changes, the eeprom location that we read also changes.

Any question there?

How do I write to the eeprom locations?

Hi Sayzer,

Thanks for your explanation about the For-Next loop, I think I can grasp the concept of the Index For-Next loop now but what I don't understand is how do I write the values to the different eeprom locations. I added some push buttons to your code to try and increase and decrease the OnTime & OffTime variables and the Hour variable in an attempt to flash an Led but can't get it to work. Could you please help me to understand how to write to the different eeprom locations?

Thanks
jessey

Code:

'Pic18f452-20/P 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_On_Off_Time_Push_Button VAR PORTD.1 '(pin 35) 6th Led VAR PORTA.1 '(pin 3) Buzzer VAR PORTC.2 '(pin 17) OnTime var byte OffTime var byte Index var byte Hour var byte HOUR = 0 Is_Pressed con 0 Is_Not_Pressed con 1 EEPROM 1,[1,2,3,4,5,6,7,8,9,10,101,102,103,104,105,106,107,108,109,110] GOTO MainLoop Change_On_Off_Time: PWM Buzzer,250,1 WHILE Change_On_Off_Time_Push_Button = Is_Pressed : PAUSE 100 : WEND Loop: IF Increase_OnTime_Push_Button = Is_Pressed THEN OnTime = OnTime + 1 : PWM Buzzer,250,1 WRITE 1, OnTime ENDIF IF Decrease_OnTime_Push_Button = Is_Pressed THEN OnTime = OnTime - 1 : PWM Buzzer,250,1 WRITE 1, OnTime ENDIF IF Increase_OffTime_Push_Button = Is_Pressed THEN OffTime = OffTime + 1 : PWM Buzzer,250,1 WRITE 101, OffTime ENDIF IF Decrease_OffTime_Push_Button = Is_Pressed THEN OffTime = OffTime - 1 : PWM Buzzer,250,1 WRITE 101, OffTime ENDIF IF Change_On_Off_Time_Push_Button = Is_Pressed THEN PWM Buzzer,250,1 WHILE Change_On_Off_Time_Push_Button = Is_Pressed : PAUSE 100 : WEND RETURN ENDIF LCDOUT $fe,1,"OnTime = ",dec Ontime LCDOUT $fe, $c0,"OffTime = ",dec OffTime PAUSE 100 goto Loop MainLoop: IF Change_On_Off_Time_Push_Button = Is_Pressed THEN GOSUB Change_On_Off_Time 'Hour variable gets its value here...... IF Increase_OnTime_Push_Button = Is_Pressed THEN Hour = Hour + 1 : PWM Buzzer,250,1 ENDIF 'Hour variable gets its value here...... IF Decrease_OnTime_Push_Button = Is_Pressed THEN Hour = Hour - 1 : PWM Buzzer,250,1 ENDIF LCDOUT $fe,1,"Hr=",dec Hour," OnTime=",dec Ontime LCDOUT $fe, $c0,"OffTime = ",dec OffTime PAUSE 100 FOR Index = 1 to 10 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 GOTO MainLoop END

WRITE will work at run-time
EEPROM or DATA will work at Programming time

DATA @101,10 will write 10 at address 101 at programming time
WRITE 101,10 will write 10 at adress 101 at run time

i will read-back the whole post here, but it think you already understand the concept... OR i'm too drunk :D ... no way!

In addition to the info from Steve, here I have some modifications for you.

Check and come back for the parts you do not understand.

Code:

EEPROM 1,[1,2,3,4,5,6,7,8,9,10,101,102,103,104,105,106,107,108,109,110] '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_On_Off_Time_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 OnTime VAR byte OffTime VAR byte Index VAR byte Hour VAR byte HOUR = 0 Is_Pressed CON 0 Is_Not_Pressed CON 1 IncrFlag = 0 '0 = button is NOT pressed. 1= button is pressed. DecrFlag = 0 GOTO MainLoop Change_On_Off_Time: WHILE Change_On_Off_Time_Push_Button = Is_Pressed : GOSUB buzz : WEND Loop: IF Increase_OnTime_Push_Button = Is_Pressed THEN WHILE Increase_OnTime_Push_Button = Is_Pressed : GOSUB buzz : WEND IncrFlag = 1 OnTime = OnTime + 1 ENDIF IF Decrease_OnTime_Push_Button = Is_Pressed THEN WHILE Decrease_OnTime_Push_Button = Is_Pressed : GOSUB buzz : WEND IncrFlag = 1 OnTime = OnTime - 1 ENDIF IF Increase_OffTime_Push_Button = Is_Pressed THEN WHILE Increase_OffTime_Push_Button = Is_Pressed : GOSUB buzz : WEND DecrFlag = 1 OffTime = OffTime + 1 ENDIF IF Decrease_OffTime_Push_Button = Is_Pressed THEN WHILE decrease_OffTime_Push_Button = Is_Pressed : GOSUB buzz : WEND DecrFlag = 1 OffTime = OffTime - 1 ENDIF IF Change_On_Off_Time_Push_Button = Is_Pressed THEN WHILE Change_On_Off_Time_Push_Button = Is_Pressed : GOSUB buzz : WEND IF IncrFlag THEN WRITE 1, OnTime 'If zero, then it means OnTime never changed. IF DecrFlag THEN WRITE 101,OffTime 'If zero, then it means OffTime never changed. gosub buzz '''' pause 100 'kind a confirmation sound. gosub buzz '''' GOTO MainLoop ENDIF LCDOUT $fe,1, "OnTime = ",dec Ontime LCDOUT $fe, $c0,"OffTime = ",dec OffTime PAUSE 10 GOTO Loop MainLoop: IF Change_On_Off_Time_Push_Button = Is_Pressed THEN goto Change_On_Off_Time 'Hour variable gets its value here...... IF Increase_OnTime_Push_Button = Is_Pressed THEN WHILE Increase_OnTime_Push_Button = Is_Pressed : GOSUB buzz : WEND Hour = Hour + 1 ENDIF 'Hour variable gets its value here...... IF Decrease_OnTime_Push_Button = Is_Pressed THEN WHILE Decrease_OnTime_Push_Button = Is_Pressed : GOSUB buzz : WEND Hour = Hour - 1 ENDIF FOR Index = 1 to 10 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

Partial sucess

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

Code:

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

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.

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

1 Attachment(s)

Getting closer

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?

Code:

'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

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

Quote:

Originally Posted by jessey

.....
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?

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1 Attachment(s)

Thanks Dave, could you explain

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

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.

Thanks Sayzer

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

Code:

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

Jessey,

"There are many ways to skin a cat"; for some "a dog", "a snake", etc...

Someone writes a code in his/her logic and it works with no problem.
Someone else writes a different code in a different logic and it also works and does the same job with no problem.

A third one writes a code in much shorter and faster way, it does the same job and works with no problem, too.

Now, since you are starting to programming, I suggest you skip the arrays at first and write long lines instead .

If you start your coding with arrays at the beginning, I see more complexity and confusion in front of you.

So when it comes to your code and project, there are of course several ways to do the same job in relatively less lines with arrays and some advanced coding techniques.

But why now?

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