Tune

[picnut]

I can see how duration , octave and note get encoded into a byte. The example I chose was minim, middle octave, note C.

However I fail to get from there to the hex value, probably old age and a lack of lubricant.

Anyone able to enlighten this old man ?. Cheers ...

picnut

 

[Technical]

See the Tune command in part 2 of the manual for the bit encoding method

minim = 11
middle octave = 00
note C = 0000

11 00 0000 in binary is C0 in hex

 

[lbenson]

>11 00 0000 in binary is D0 in hex

C0 by my calculation

 

[picnut]

Yes, I also got 11000000 but the Windows calculator maintains that is C0 in Hex, when according to page 151 of "Programming and customising etc" ... I read it, that middle C should be $00. Something is amiss ......

 

[Technical]

$C0 is correct for octave 6, C, minim (corrected above!)

For $00 it would be crochet C 6, not minim C 6, so it sounds like the book is wrong.

 

[westaust55]

Yes, I also got 11000000 but the Windows calculator maintains that is C0 in Hex, when according to page 151 of "Programming and customising etc" ... I read it, that middle C should be $00. Something is amiss ......

Unfortunately that book you reference is known to have a number of typos.
Pity no errata sheet is available.

PICAXE Manual 2 (currently Rev 6.9) page 207 onwards should be used as your reference.

 

[AndyGadget]

Tune Spreadsheet

No explaination - no time as I'm just off with the family for the weekend, but this spreadsheet I put together may come in useful. (Change the extension to .XLS.)

 

[picnut]

Thanks a lot chaps, I think I have it now.

picnut.