Hello,
I am new on I2S protocol. I have a question.
I have s32k148 board and fda903d amplifier. I have a sound data ( voice record) in flash. I am reading that sound and writing in buffer in RAM ( ring buffer ).
I have also adc to change pitch ( not actual pitch).
for example audio data in buffer seems like ( sx : 32bit sample):
s1,s2,s3,s4,s5,s6....s512
if ı want to increase frequency , I want to send data to I2S like ( jumping samples )
s1,s2,s3,s4,s5,s7
or
s1,s2,s4,s5,s7,s9
and if ı want to decrease frequency , I want to send data to I2S like ( repeat samples)
s1,s2,s2,s3,s4,s5,s5,s6,s7
or for more slow
s1,s2,s2,s3,s3,s4,s5
Now , at processor expert there is a function to send data to i2s, that function needs I2S instance, buffer pointer and sample count. but it plays like that:
s1,s2,s3,s4,s5,s6,s7.
Q1: how can i jump or repeat samples ?
Q2: is it possible to send samples by one by without changing sample rate of sound ? should ı use timer for that ? or is there a periodic interrupt for every sample time in SAI
