Sorry for the cross postings but I really need help.
I'm trying to use the Opencores I2S master logic as the driver for my test platform to generate test audio signals.
The core came configured with SCK = 2.77 MHz and WS(left/right clock)=69.44 KHz.
I would like to be able to reconfigure the core to generate SCK=3.07MHz
and WS=48 KHz.
I played around with the conf variable but could not get the ratio I'm looking for.
I read the documentation but I still cannot understand. An explanation would certainly help.
According to the manual, The sample rate is given by bit_rate/(RES * 2)
If I choose the sample rate to be 48 KHz, and the resolution is20-bits, the bit rate would be 1.92 Mbps.
However, the RATIO would then be calculated as follows.
RATIO= (wishbone_bus_clock - (sample_rate * RES * 8)) / (sample_rate * RES * 4)
wishbone_bus_clock= 50 MHz sample rate = 48 KHz RES=20 bits
which would then be equal to ~22 (10110) This is not giving me the values of 48KHz for WS and 3.072 MHz for i2s_sck.
Could you please help?