Error (209014): CONF_DONE pin failed to go high in device 1.

Hi Sameer,

Thank you for the update.

From the screenshot, the device is detected in JTAG, so the USB-Blaster connection looks OK. The error at around 32% usually means the FPGA configuration did not complete, and CONF_DONE did not go high.

Please try the following next:

1. Use the built-in USB-Blaster II on the Cyclone V E Development Kit.
2. Confirm the .sof file is generated for the exact FPGA device on the board, for example 5CEFA7F31.
3. Try programming one of the example .sof files from the Cyclone V E Development Kit design package.
4. Keep the board DIP switch setting at the default/factory setting as listed in the development kit user guide.

If the example .sof file also fails with the same error, please share the Quartus version used and a clear photo of the board DIP switch settings.

Regards,
Fakhrul