set_property PACKAGE_PIN L13 [get_ports clk]
set_property PACKAGE_PIN G19 [get_ports rst]
set_property PACKAGE_PIN E17 [get_ports io_led[4]]
set_property PACKAGE_PIN F13 [get_ports io_led[5]]
set_property PACKAGE_PIN G13 [get_ports io_led[6]]
set_property PACKAGE_PIN F14 [get_ports io_led[7]]

set_property IOSTANDARD LVCMOS33 [get_ports clk]
set_property IOSTANDARD LVCMOS33 [get_ports rst]
set_property IOSTANDARD LVCMOS33 [get_ports io_led[4]]
set_property IOSTANDARD LVCMOS33 [get_ports io_led[5]]
set_property IOSTANDARD LVCMOS33 [get_ports io_led[6]]
set_property IOSTANDARD LVCMOS33 [get_ports io_led[7]]