read_uid.c

00001 /* CMSIS-DAP Interface Firmware
00002  * Copyright (c) 2009-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 #include "read_uid.h"
00017 
00018 #define UID_BASE 0x40001018
00019 
00020 void read_unique_id(uint32_t * id)
00021 {
00022     uint32_t *uid_ptr = (uint32_t*)UID_BASE;
00023     *id = uid_ptr[0] ^ uid_ptr[1] ^ uid_ptr[2] ^ uid_ptr[3];
00024 }