Rob Nertney wrote:
I've made changes to remove the high-frequency. I originally tried that method because my DMA IRQ fires whenever it writes 1/2 frame (it doesn't have coalescing support yet).
The snd_pcm_hardware is supposed to describe the hardware.
I have a DMA which is looping across 64Kbytes.
This is buffer_bytes.
The DMA is configured to interrupt at 32Bytes
This is period_bytes.
From what I can tell (please correct me if I'm wrong), the periods_min and periods_max are up to me to define
They describe how often the *hardware* can interrupt.
since i don't interrupt on a period boundary.
Periods are *defined* as the data between two interrupts.
Mapping ALSA periods to something else makes sense only if the hardware cannot interrupt after a fixed number of bytes.
Regards, Clemens