[Bug]: LED does not blink after flashing

[codingmavy]

Board

Shrike-Lite (RP2040)

Board Revision

V1.0-R0.5

Firmware

MicroPython UF2

Operating System

Windows

What happened?

When generating a bitstream from main.v (taken from the official repository) using GO Configure v6.54 on Windows and flashing it to the Shrike Lite board (SLG47910V RevBB), the LED does not blink as expected.

However, when using a pre-generated bitstream (e.g., one generated externally or provided by Claude AI), the LED blinks correctly on the same hardware. This strongly suggests the issue is with the bitstream generated by GO Configure v6.54 rather than with the hardware, the source Verilog, or the flashing process.

Steps to reproduce

1. Clone the repository of Led Blink and open main.v in GO Configure v6.54 (Windows)
2. Generate bitstream targeting SLG47910V RevBB
3. Flash the generated bitstream to the Shrike Lite board
4. Observe: LED does not blink

Serial output / error message

Screenshots

Example or project affected

Additional context

[UpendraReddi]

@codingmavy Can you tell me that, which pin number that you have assigned for LED in the IO planner??

[codingmavy]

@codingmavy Can you tell me that, which pin number that you have assigned for LED in the IO planner??

I assigned GPIO 16 OUTPUT for LED as mentioned in guide

[UpendraReddi]

@codingmavy Can you tell me that, which pin number that you have assigned for LED in the IO planner??

I assigned GPIO 16 OUTPUT for LED as mentioned in guide

Then it should work, let me test and confirm that once and will let you know.

[codingmavy]

Ok thanks

[dpks2003]

@codingmavy Few things if you can reply did you connect the OE pin to the 16 OE ?
Did you properly connect the clock and clock enable to the IO map?
Which bitstream did you try to flash from the bitstream folder ?

[codingmavy]

Yes I connected clock and clock enable pins and followed the full guide
I flashed FPGA_bitstream.bin
One thing to note is that bitstream present in repo is of 46KB and the bitstream i flashed is of 44KB

[dpks2003]

can you tell me the complete bitstream name you are flashing it should be "FPGA_bitstream_MCU.bin"

[UpendraReddi]

@codingmavy I tried in the GO Configure v6.54 software version to generate the bitstream, and tested that bitstream on the board Shrike-Lite V1.0-R0.5. It's working perfectly. LED is blinking, you might missing something, Otherwise it should work.

[dpks2003]

@codingmavy since the hardware works fine and the test bitstream is also working lets move issue to discussion as neither its a issue with hardware nor with software

[codingmavy]

I identified the root cause of the issue. Initially, while using the MicroPython UF2 firmware, I accidentally flashed the wrong bitstream FPGA_bitstream.bin instead of the correct one FPGA_bitstream_MCU.bin.

After switching to the Arduino framework, I mistakenly flashed FPGA_bitstream.bin again. Once I realized the mistake, I flashed the correct bitstream FPGA_bitstream_MCU.bin. However, it did not overwrite the previously programmed incorrect bitstream, even after I regenerated the bitstream and saved it with different filenames.

To resolve the issue, I switched back to the MicroPython framework and flashed the correct bitstream FPGA_bitstream_MCU.bin once more. This time, the incorrect bitstream was successfully overwritten, and the system started working as expected.