code: def erase_all(self):
          
          assert self._active_operation == self.Operation.ERASE
          assert self.is_erase_all_supported
  
          # update core register to execute the erase_all subroutine
          result = self._call_function_and_wait(self.flash_algo['pc_eraseAll'])
  
          # check the return code
          if result != 0:
              raise FlashEraseFailure('erase_all error: %i' % result, result_code=result)
docs: !
          @brief Erase all the flash.
          
          @exception FlashEraseFailure