Ist es möglich eine Sinus funktion zu verwenden?
Wenn ich die math.h verwenden will kommt immer das:
sdcc: Calling preprocessor...
sdcc: Generating code...
==========================================================================
Linking project
error: missing definition for symbol "_sinf", required by "_output\main.o"
ERROR!
Process terminated with status 1 (0 minutes, 3 seconds)
0 errors, 0 warnings
anscheinend wird das nicht in der LIB von TK unterstützt.
gibt es eine Lösung?
Hi Rio depending on the resolution you need
you could use a lookup table to get sine values
take a look at the analog toolbox project (I think you can find the table in map.c)
the only problem with is that you will have to scale the output to your needs
right now 0 is 128 in the table, negative values are between 127 and 0 and so on
if you need a custom lookup table (16bit, signed format) let me know
I’ll take a look into 
i don’t know how tk did it on MBSID Application?
Does he used a lookup table too or a function for that?
Yes he used the same method
the only difference with between the sid and analog toolbox
is that the sid table uses a table containing only one half of the sine
and ‘mirrors’ this data to get the full wave to save memory..
you mean this file: sid_lfo_table.inc ?
no, it’s called sid_sin_table.inc