My custom board used imx6sl MPU.
And It is using SSI Interface between iMX6SL and vocoder(AMBE3000).
- The used ssi pin information is shown below.
SSI interface has problem. Check please.
At TX signal, Frame Sync pin clock is generated differently.
-- Yello : TXFS pin.
-- Green : TXC pin.
-- Blue : TXD pin.
I send 32Byte same data. kernel version is 3.14.52.
First image is normal.
But Second image is different. I marked it with a dotted line.
Frame Sync additional clock was generated. (1clock)
This problem is very important.
What is the cause? Please ask for a review.