2.5.1 Lock Bit File

A default lock bit file is generated by Libero SoC when the design flow step Generate FPGA Array Data is executed. The default file is located at /designer//_init_config_lock_bits.txt.

This file contains an entry for every lock bit available in the device. The format of the lock bit file is: < lock bit value>.
  • lock_bit_name: Lock bit name in the format <Physical block name>_<register name>_LOCK
  • lock_bit_value: 1 register unlocked (default); 0 register locked

Rename this file and edit the settings of each register lock bit as desired. Once complete, add the file to the design flow as described in Setting Lock Bit Protection section.

Important: Changing the content of the lock-bits file does not invalidate place-and-route. However, you must regenerate the FPGA array data and regenerate the bitstream for lock bit changes to take effect. The current state of lock bits can be observed in the regenerated lock bits file that is recreated during the Generate FPGA Array Data.