Re: [hatari-devel] No sound in the Pacemaker Demo

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 03/06/2014 20:21, David Savinkoff a écrit :
> I looked at the LMC1992 data sheet, here is what I surmise:
>
> 1) The mask must be at least eleven consecutive bits long, or the
>     LMC1992 is left in an intermediate state, and restarts the sequence
>     when there is a break in the mask. Think of the Mask as an enable
>     signal.
>     (Six usable 11 bit Masks. eg. 0011111111111000, 0000011111111111)
>     (Five usable 12 bit Masks)
>     (Zero usable Masks less than 11 bits long)
>
>     Note that it may be possible to send two (or more) 16 bit Masks that
>     act as a single 32 bit Mask.
>     ( 0000000000011111, 1111110000000000 )
>
> 2) The first two Mask bits are a device address. The last nine bits
>     are register bits. Any bits between the first two and last nine are
>     lost when the Mask is longer than eleven bits.

This is what I implemented, except I didn't handle the fact that you 
could have a mask like 1100 0111 1111 1111 where you should ignore the 5 
first bits and check again the 11 other bits. Hopefully, no one used a 
mask like this, else I could fix it if needed.

Nicolas