Eric T Posted May 26, 2015 Report Share Posted May 26, 2015 I'm following the "Intro to Spartan" book and am running in to a issue. No matter what I do LED0 is always on. I am following the example program in Chapter 6. I am using the Papilio Pro with the Logicstart Megawing. I also have loaded the QuickStart bit file and see the same issue. LED0 is always on. LED2, LED4, and LED6 flash as expected. One other thing I have noticed is that when I first power the board all the LEDs turn on. However, LED1-LED7 are dim. LED0 is full power when first turned on. I tried the following but LED0 remains lit:LED_0 <= '0'; I'm hoping this is something simple. Any ideas about why LED0 is always on? Here is the UCF file I am using. The vhd code is the same as in the "Intro to Spartan"NET switch_0 LOC="P114" | IOSTANDARD=LVTTL; NET switch_1 LOC="P115" | IOSTANDARD=LVTTL; NET LED_0 LOC="P123" | IOSTANDARD=LVTTL; NET LED_1 LOC="P124" | IOSTANDARD=LVTTL; Thanks,Eric Quote Link to comment Share on other sites More sharing options...
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