Now I'm using hdl-2015r1 to test the ad-fmcomms2-ebz and zed. I use my custom core to send data. Now i want to use gpio to control adc_capture() for accurately get my transmit data. I find gpio_i, gpio_t and gpio_o in PS7 processing core, but i don't know how to use. Does anyone konw it? On the other hand, if i want to adopt interrrupt style to control the DMA, and control signal is given in vivado, even by gpio? Anyone knows it?