Hi,
We are interfacing the RT1064 to a TLV320ADC3140 ADC-converter using the TDM protokol.
Everything setting up the ADC and the serial interface (ASI) works fine, as you see on this screen shot:
We are using 4 channels @ 24bit resolution with an Fs @ 24kHz.
But we have one problem. No data seems to arrive in the SAI receive register, and the DMA channel configured for sample data reception is not generating any interrupts, as the buffer is never filled.
When running as shown above on the oscilloscope screenshot, the SFR looks like this:
There is some of the sittings that is unclear to me, which might be wrong.
E.g. RCR5.FBT is 24 (First bit shifted = 25 in the config tool), but it should probably be decremented.
Mex file attached.
Besides the code generated from the config tool I have written following code:
void SAI2_RX_Callback(I2S_Type *base, sai_edma_handle_t *handle, status_t status, void *userData)
{
buffers_compleated++;
sai_transfer_t xfer;
xfer.dataSize = audio_buffer_size * sizeof(uint32_t);
xfer.data = audio_buffer1;
SAI_TransferReceiveEDMA(SAI2_PERIPHERAL, &SAI2_SAI_Rx_eDMA_Handle, &xfer);
}
void audio_start(void)
{
sai_transfer_t xfer;
xfer.dataSize = audio_buffer_size * sizeof(uint32_t);
xfer.data = audio_buffer1;
SAI_TransferReceiveEDMA(SAI2_PERIPHERAL, &SAI2_SAI_Rx_eDMA_Handle, &xfer);
}
I now I loose some data, that must be solved later.
I'm using SDK version 2.8.6, and MCUXpresso version 11.2.0, Config tools from 20200707 (Various version numbers)
Please help locating the problem.
Regards
Kasper
