(8N, 8P, 8H) viewtopic.php?f=20&t=225
It seems that there is an I2S module with a TX and RX unit, but I am unsure if this is the same SDIO unit that document 8H indicates can run in SPI compatibility mode. I don't know if the I2S function is just a compatibility mode as well. They share the same link list configuration instructions for DMA transfer.
I ask about the registers and interrupts because I see interrupt registers defined in the Espressif mp3 streaming I2S example, but I can't seem to make them function automatically. I don't know if this is something I can write a value to the raw interrupt register and trigger an interrupt that way.
I tried some bit banging, and I am able to detect word changes on my I2S Word_select input line, but I have not yet been successful getting the I2S FIFO to read in the DATA line in response. I am also unsure if the FIFO can make an automatic operation to the DMA. There is a register called I2SREXOF_NUM that seems to have something to do with this.
Long story short, I will take your advice and keep trying to implement software control after I calm down for a bit. Thanks.Statistics: Posted by anwarhahj — Tue Sep 15, 2015 3:01 am
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