[转]iMPACT Spartan-6 FPGA - "WARNING:iMPACT:2217-Error shows in the status register, CRC Error bit is Not 0"

AR# 45304

iMPACT Spartan-6 FPGA - "WARNING:iMPACT:2217-Error shows in the status register, CRC Error bit is Not 0"

https://www.xilinx.com/support/answers/45304.html

Description

If I program a Spartan-6 device using iMPACT, the following message occurs:

WARNING:iMPACT:2217-Error shows in the status register, CRC Error bit is Not 0

Configuration completes successfully and DONE goes High on the board.

Why does this message appear?

Solution

If you have "Security Level = 1" or "Security Level = 0" set in your BitGen options, then you might see this warning.

For Spartan-6 FPGA:

Security level:

• Level0: SBITS=00: R/W OK (default)
• Level1: SBITS=01: Permits only ICAP readback
• Level2: SBITS=10: All readback disabled

The status register is covered by this security setting as it is a config register.

It is expected that it will not be readable with security set, so this warning is flagged.

The warning can be ignored if you have these settings.