Breadboarding a Spartan 7 series FPGA

Constraints code

	set_property CFGBVS VCCO [current_design]
	set_property CONFIG_VOLTAGE 3.3 [current_design]

	set_property -dict { PACKAGE_PIN V6 IOSTANDARD LVCMOS33 } [get_ports { led1 }]; #IO_L22N_T3_AD7N_35 Sch=led0_b
	set_property -dict { PACKAGE_PIN V7 IOSTANDARD LVCMOS33 } [get_ports { led2 }]; #IO_L21P_T3_DQS_AD14P_35 Sch=led0_r

	set_property -dict { PACKAGE_PIN V2 IOSTANDARD LVCMOS33 } [get_ports { button1 }]; #IO_L4N_T0_35 Sch=btn[0]
	set_property -dict { PACKAGE_PIN V3 IOSTANDARD LVCMOS33 } [get_ports { button2 }]; #IO_L4P_T0_35 Sch=btn[1]
	set_property -dict { PACKAGE_PIN V4 IOSTANDARD LVCMOS33 } [get_ports { button3 }]; #IO_L4N_T0_35 Sch=btn[0]
	set_property -dict { PACKAGE_PIN V5 IOSTANDARD LVCMOS33 } [get_ports { button4 }]; #IO_L4P_T0_35 Sch=btn[1]

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Demo code

	module top(
	input button1,
	input button2,
	input button3,
	input button4,
	output led1,
	output led2
	);

	assign led1 = button1 & button2 & button3 & button4;
	assign led2 = button1 \| button2 \| button3 \| button4;

	endmodule

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