My group is trying to modify the swra295a - AN082 -- One Way and Two-Way Audio Communications using the CC1110 or CC2510application note to do a 1 way audio broadcast. We are using the 24khz cc2510 one way code and workspace.
We have radio communication between the two chips but the I2S data in registers always show 0xFF. We're using a PCM1808 instead of the audio codec used in the APP note so any SPI transfers are not used. We can see data on the scope and even pulling down the data line the high and low I2S data registers are showing as FF in the debugger.
From the basic configuration on the app note we have changed
I2SCFG1 = 0x78; to I2SCFG1 = 0xB8; // 48 BCK's per LRCK because the ADC is 24 bits *2 channels up from 16 bits per channel on the codec
Clock divider registers now look like this (and we have data using a 9.216MHz MCK)
I2SCLKF2 = 0x06; I2SCLKF1 = 0x59; I2SCLKF0 = 0x90;
The slave 2510 receives the data as FF as well so the problem is with our I2S input.