I'm currently working on a i.MX6DL board made by myself for communicating with a FPGA via the EIM port. i.MX6DL only write datas to fpga. Hardware port only contains eim data[31:16] and cs0, eim address port is not used. The write operation works well if the registers is configured like bellow:
echo 00020081 > /sys/class/misc/fpga/CS0GCR1
echo 00000001 > /sys/class/misc/fpga/CS0GCR2
echo 1C022000 > /sys/class/misc/fpga/CS0RCR1
echo 0000C000 > /sys/class/misc/fpga/CS0RCR2
echo 1404a38e > /sys/class/misc/fpga/CS0WCR1
echo 00000000 > /sys/class/misc/fpga/CS0WCR2
Now i want to improve transfer speed, I re-configure those registers according to page 1040 of "IMX6 processor ref manual.pdf" like bellow:
echo 00420081 > /sys/class/misc/fpga/CS0GCR1
echo 00000000 > /sys/class/misc/fpga/CS0GCR2
echo 04000000 > /sys/class/misc/fpga/CS0RCR1
echo 0000C000 > /sys/class/misc/fpga/CS0RCR2
echo 04000000 > /sys/class/misc/fpga/CS0WCR1
echo 00000000 > /sys/class/misc/fpga/CS0WCR2
But the speed is not improved as much as i thought, it seems CSREC of CS0GCR1 not work, did I miss something important?
