The Problem ist the continuous sending of Byte-Arrays with spi and fixed sample rate. Strategie:
- Send Array-List with XFER triggered by Timer (every 3ms) and auto increment
- another timer counts the single transfers and stops after array end is reached
Problem: With Softdevice there is an interrupt latency of 200µs max. For sound i need to send big Data to a DAC.
Idea1: ring buffer. but i am not able to Reset Pointer of array list with PPI (XFER) isnt it?.
Idea: Double Buffering. Problem: I need an interrupt to start new XFER. worst case: Interrupt is delayed by softdevice -> Sound distotion