Mind-Dev-Z7020 docs 30 Mind-Dev-Z7020-Linux 1-petalinux environment construction 2-petalinux booting via TFTP and NFS 3-boot from eMMC 4-power on startup 5-GPIO control in linux 6-i2c peripheral access in linux 7-CAN communication in linux 8-TCP communication in linux 10-hdmi display in linux 9-USB test in linux Mind-Dev-Z7020-Vitis 20-dual OV5640 camers 19-audio(WM8960) test 18-porting LVGL to zynq 17-AXI GPIO test 16-XADC test 15-eth1 lwip server test 14-FreeRTOS exmaple 13-HMDI color bars test 12-QSPI flash read/write test 11-DDR configuration