Fullfilling lookup tables

[Acetronics2]

Hi, Everybody

Suppose we want to have a 250 values LOOKUP table ....

Writing all values by hand is quite boring and not error-free guaranteed ... isn't it ???

Now, working with MPLAB ( or else ) permits to locate the beginning of the RETLW xx list in the ASM listing .... and we know how to include a text file containing RETLW xx 's , ... coming from an Excel page or so ... precomputing media.

Would it be possible to find something to include the DATA file into the PbP brackets ( easiest solution !!! ), or a modifier, i.e " REP x\250 ", or another trick to keep free space in the ASM Listing to allow including the DATA file .... ????

Alain

[mister_e]

Or i'm dumb or i need more cofee but i can't figure out what you ask for.

Please, help the old Quebecer guy to understand. It sounds an interesting idea overall, it's just unclear to me...

Un dessin, un dessin, un dessin

[Acetronics2]

Hi, Steve

No design needed .... just strong coffee.

You want a big lookup table ... how to fill automatically, from an existing text file, the values between the brackets ???

Of course with a PbP source program ...

1St way : a modifier in the LOOKUP statement, plus including the file at the right ASM line ???
2Nd way : include the text file between the brackets ...????
3Rd way : ????

Last way: Modify the Lookup routine !!!
Lazy way : Copy and Paste .....

PbP 's hard point is there is a L 00001 label that is inserted by the compiler just past the LOOKUP routine ... so, impossible to only use the ORG directive to make room !!! The brackets must contain the right number of constants ...

Alain

[peterdeco1]

Hi Alain. If you figure out a way to do this, it would help alot. Right now I'm using about 8K of code space that repeats the same opcode to an ISD5008 using the shiftout command. However, each opcode has a different address. To put these different addresses between the brackets into a lookup table re-using one opcode would shorten the code much.

[Acetronics2]

Hi,Peter

The only way I see at the moment is to create a simple program ( GW or QBasic ...) that gives your DATA bytes separated by a comma ... into a .txt file.

Then, you copy it and paste between the brackets. so simple as this !!!

Of course it must exist a mathematical relation between input and output ... or the loading can't be made else than by-hand !!!

I think I'll have a look to the SIN routine in the PbP libs ... to see if it's possible to modify it. ( or a similar routine )

Alain

[peterdeco1]

Hi Alain. I guess I wasn't being clear in my last post. For example, someone pushes a series of buttons. Each button is a different ISD address. Now comes playback time. What I have done that is memory intensive is this:

ShiftOut PORTC.5,PORTC.3,0,[FIRST\16] 'first is variable for 1st playback address
ShiftOut PORTC.5,PORTC.3,0,[SECOND\16] 'second is variable for 2nd playback address
ShiftOut PORTC.5,PORTC.3,0,[THIRD\16] 'third is variable for 3rd playback address

Now, if those variables were written into the program by itself such as [224,132,188] I could use the lookup command, put it into X and use something like:

ShiftOut PORTC.5,PORTC.3,0,[X\16] 'X is variable for all addresses
next X

Right now I have 20 address variables & 20 shiftout commands and a large block of code that says LET FIRST = 111, LET SECOND = 222, etc. I even thought of using read & write but the problem is getting those numbers into brackets. - Peter