[alsa-devel] snd_pcm_hardware structure

Adish Kuvelker adkuvi at gmail.com
Wed Jun 23 22:41:50 CEST 2010

so I am thinking of sound hardware generating an interrupt at the FIFO
having 32-bytes.
In your first reply did you mean that periods_min = periods_max =1
would be the setting correponding to my hardware initializations to
generate an interrupt after 16 16-bit samples having been transferred?
So considering that the FIFO bank is of 64 bytes, what do you think
would be the setting for periods_min and periods_max?


On Thu, Jun 24, 2010 at 1:56 AM, Adish Kuvelker <adkuvi at gmail.com> wrote:
> yes...I know that my hardware will generate the interrupt and it will
> be at FIFO being half empty.
> On Thu, Jun 24, 2010 at 12:17 AM, James Courtier-Dutton
> <james.dutton at gmail.com> wrote:
>> On 23 June 2010 18:57, Adish Kuvelker <adkuvi at gmail.com> wrote:
>>> Hello James,
>>> Thanks a lot....Just a typo error for the period_bytes_min and
>>> period_bytes_max in my mail.....
>>> Now that my FIFO is 64 bytes and if I need an interrupt to the CPU for
>>> FIFO being half-empty (i.e 32 bytes = 16 16-bit samples), would it be
>>> right to set the periods_min = periods_max = 32?
>> No. The periods do not create the interrupt.
>> Your sound hardware has to do the interrupt.
>> When does you hardware do the interrupt?

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