Hi,
When I use spi fifo, the transmission speed is very slow, and I find that the interval between word is very long by capturing the signal.
sdk : processor-sdk-linux 05.02.00.10.
kernel:linux 4.14.79
spi controller driver :spi-omap2-mcspi.c
I checked am5728 TRM(24.4.4.6 FIFO Buffer Management) about the use of fifo, and it seems no problem.
When using FIFO to transfer 4096 bytes of data, MCSPI_XFERLEVEL [5: 0] AEL is 63, [31:16] WCNT is 4096, MCSPI_CHxCONF [27] FFEW bit is 1, MCSPI_CHxCONF [11: 7] WL bit is 7.
At this time, fifo has no other channels in use.
Looking forward to your reply, thanks!