Honored Contributor
Honored Contributorviliz, that's a good strategy. If you have a scope you can also use a simple trick: create a free running counter (practically impossible to get wrong) and assign the pins to different bits of the counter. Then you can correlate the pins based on the frequency.
I tested this to work exactly as expected:
module de2_70_demo(input iCLK_50,
input iSW,
output oLEDR,
output GPIO_0,
output GPIO_1);
reg cnt; always @(posedge iCLK_50) cnt <= cnt + 1;
assign GPIO_0 = iSW ? cnt : {32{cnt}};
assign GPIO_1 = ~GPIO_0;
assign oLEDR = GPIO_1;
endmodule
set_global_assignment -name FAMILY "Cyclone II"
set_global_assignment -name DEVICE EP2C70F896C6
set_global_assignment -name TOP_LEVEL_ENTITY de2_70_demo
set_location_assignment PIN_AD15 -to iCLK_50
set_location_assignment PIN_C30 -to GPIO_0
set_location_assignment PIN_C29 -to GPIO_0
set_location_assignment PIN_F29 -to GPIO_0
set_location_assignment PIN_G29 -to GPIO_0
set_location_assignment PIN_F30 -to GPIO_0
set_location_assignment PIN_G30 -to GPIO_0
set_location_assignment PIN_H29 -to GPIO_0
set_location_assignment PIN_H30 -to GPIO_0
set_location_assignment PIN_J29 -to GPIO_0
set_location_assignment PIN_H25 -to GPIO_0
set_location_assignment PIN_J30 -to GPIO_0
set_location_assignment PIN_H24 -to GPIO_0
set_location_assignment PIN_E28 -to GPIO_0
set_location_assignment PIN_J25 -to GPIO_0
set_location_assignment PIN_K24 -to GPIO_0
set_location_assignment PIN_J24 -to GPIO_0
set_location_assignment PIN_K25 -to GPIO_0
set_location_assignment PIN_L22 -to GPIO_0
set_location_assignment PIN_M21 -to GPIO_0
set_location_assignment PIN_L21 -to GPIO_0
set_location_assignment PIN_M22 -to GPIO_0
set_location_assignment PIN_N22 -to GPIO_0
set_location_assignment PIN_N25 -to GPIO_0
set_location_assignment PIN_D29 -to GPIO_0
set_location_assignment PIN_N21 -to GPIO_0
set_location_assignment PIN_N24 -to GPIO_0
set_location_assignment PIN_G27 -to GPIO_1
set_location_assignment PIN_G28 -to GPIO_1
set_location_assignment PIN_H27 -to GPIO_1
set_location_assignment PIN_L24 -to GPIO_1
set_location_assignment PIN_H28 -to GPIO_1
set_location_assignment PIN_L25 -to GPIO_1
set_location_assignment PIN_K27 -to GPIO_1
set_location_assignment PIN_L28 -to GPIO_1
set_location_assignment PIN_E27 -to GPIO_0
set_location_assignment PIN_K28 -to GPIO_1
set_location_assignment PIN_L27 -to GPIO_1
set_location_assignment PIN_K29 -to GPIO_1
set_location_assignment PIN_M25 -to GPIO_1
set_location_assignment PIN_K30 -to GPIO_1
set_location_assignment PIN_M24 -to GPIO_1
set_location_assignment PIN_L29 -to GPIO_1
set_location_assignment PIN_L30 -to GPIO_1
set_location_assignment PIN_P26 -to GPIO_1
set_location_assignment PIN_P28 -to GPIO_1
set_location_assignment PIN_D28 -to GPIO_0
set_location_assignment PIN_P25 -to GPIO_1
set_location_assignment PIN_P27 -to GPIO_1
set_location_assignment PIN_M29 -to GPIO_1
set_location_assignment PIN_R26 -to GPIO_1
set_location_assignment PIN_M30 -to GPIO_1
set_location_assignment PIN_R27 -to GPIO_1
set_location_assignment PIN_P24 -to GPIO_1
set_location_assignment PIN_N28 -to GPIO_1
set_location_assignment PIN_P23 -to GPIO_1
set_location_assignment PIN_N29 -to GPIO_1
set_location_assignment PIN_E29 -to GPIO_0
set_location_assignment PIN_R23 -to GPIO_1
set_location_assignment PIN_P29 -to GPIO_1
set_location_assignment PIN_R22 -to GPIO_1
set_location_assignment PIN_P30 -to GPIO_1
set_location_assignment PIN_G25 -to GPIO_0
set_location_assignment PIN_E30 -to GPIO_0
set_location_assignment PIN_G26 -to GPIO_0
set_location_assignment PIN_AA23 -to iSW
set_location_assignment PIN_AB26 -to iSW
set_location_assignment PIN_W5 -to iSW
set_location_assignment PIN_V10 -to iSW
set_location_assignment PIN_U9 -to iSW
set_location_assignment PIN_T9 -to iSW
set_location_assignment PIN_L5 -to iSW
set_location_assignment PIN_L4 -to iSW
set_location_assignment PIN_L7 -to iSW
set_location_assignment PIN_L8 -to iSW
set_location_assignment PIN_AB25 -to iSW
set_location_assignment PIN_AC27 -to iSW
set_location_assignment PIN_AC26 -to iSW
set_location_assignment PIN_AC24 -to iSW
set_location_assignment PIN_AC23 -to iSW
set_location_assignment PIN_AD25 -to iSW
set_location_assignment PIN_AD24 -to iSW
set_location_assignment PIN_AE27 -to iSW
set_location_assignment PIN_AJ6 -to oLEDR
set_location_assignment PIN_AK5 -to oLEDR
set_location_assignment PIN_AC13 -to oLEDR
set_location_assignment PIN_AB13 -to oLEDR
set_location_assignment PIN_AC12 -to oLEDR
set_location_assignment PIN_AB12 -to oLEDR
set_location_assignment PIN_AC11 -to oLEDR
set_location_assignment PIN_AD9 -to oLEDR
set_location_assignment PIN_AD8 -to oLEDR
set_location_assignment PIN_AJ7 -to oLEDR
set_location_assignment PIN_AC14 -to oLEDG
set_location_assignment PIN_W27 -to oLEDG
set_location_assignment PIN_AJ5 -to oLEDR
set_location_assignment PIN_W25 -to oLEDG
set_location_assignment PIN_W23 -to oLEDG
set_location_assignment PIN_Y27 -to oLEDG
set_location_assignment PIN_Y24 -to oLEDG
set_location_assignment PIN_Y23 -to oLEDG
set_location_assignment PIN_AA27 -to oLEDG
set_location_assignment PIN_AA24 -to oLEDG
set_location_assignment PIN_AJ4 -to oLEDR
set_location_assignment PIN_AK3 -to oLEDR
set_location_assignment PIN_AH4 -to oLEDR
set_location_assignment PIN_AJ3 -to oLEDR
set_location_assignment PIN_AJ2 -to oLEDR
set_location_assignment PIN_AH3 -to oLEDR
set_location_assignment PIN_AD14 -to oLEDR
set_global_assignment -name CYCLONEII_RESERVE_NCEO_AFTER_CONFIGURATION "USE AS REGULAR IO"
set_global_assignment -name RESERVE_ASDO_AFTER_CONFIGURATION "AS INPUT TRI-STATED"
set_global_assignment -name RESERVE_ALL_UNUSED_PINS "AS INPUT TRI-STATED"
set_global_assignment -name RESERVE_ALL_UNUSED_PINS_NO_OUTPUT_GND "AS OUTPUT DRIVING AN UNSPECIFIED SIGNAL"
set_global_assignment -name VERILOG_FILE toplevel.v
