Diff: source/hic_hal/atmel/sam3u2c/read_uid.c

Revision:

0:01f31e923fe2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/hic_hal/atmel/sam3u2c/read_uid.c	Tue Apr 07 12:55:42 2020 +0200
@@ -0,0 +1,65 @@
+/**
+ * @file    read_uid.c
+ * @brief   
+ *
+ * DAPLink Interface Firmware
+ * Copyright (c) 2009-2016, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "stdbool.h"
+
+#include "read_uid.h"
+#include "sam3u.h"
+#include "cortex_m.h"
+
+bool unique_id_created = false;
+static uint32_t unique_id[4];
+void read_unique_id(uint32_t *id)
+{
+    if (!unique_id_created) {
+        create_unique_id();
+        unique_id_created = true;
+    }
+
+    id[0] = unique_id[0];
+    id[1] = unique_id[1];
+    id[2] = unique_id[2];
+    id[3] = unique_id[3];
+}
+
+__attribute__((section("ram_func")))
+void create_unique_id(void)
+{
+    cortex_int_state_t state;
+    state = cortex_int_get_and_disable();
+    EFC0->EEFC_FMR |= (1UL << 16);
+    EFC0->EEFC_FCR = 0x5A00000E;
+
+    /*Monitor FRDY*/
+    while ((EFC0->EEFC_FSR & EEFC_FSR_FRDY) == EEFC_FSR_FRDY);
+
+    unique_id[0] = *(uint32_t *)0x80000;
+    unique_id[1] = *(uint32_t *)0x80004;
+    unique_id[2] = *(uint32_t *)0x80008;
+    unique_id[3] = *(uint32_t *)0x8000C;
+    EFC0->EEFC_FCR = 0x5A00000F;
+
+    /*Monitor FRDY*/
+    while ((EFC0->EEFC_FSR & EEFC_FSR_FRDY) != EEFC_FSR_FRDY);
+
+    EFC0->EEFC_FMR &= ~(1UL << 16);
+    cortex_int_restore(state);
+}