Tool/software:

The following figure shows pinmux and gpmc configurations

I use gpio interrupt to read fpga data，when an interrupt occurs, will ues the following function to let the data from gpmc addr 0x1000000 to ddr memery 0x9f000000，The interruption is about 5ms once，amount of data transported each time is 4K. A cycle is about 400 times, about 1.5M of data.

However, through the logic analyzer, there will be occasional late reading data，there is a picture of the logic analyzer：