Arrow / Mbed OS DAPLink Reset

Repostiory containing DAPLink source code with Reset Pin workaround for HANI_IOT board.

Upstream: https://github.com/ARMmbed/DAPLink

source/hic_hal/atmel/sam3u2c/read_uid.c@0:01f31e923fe2, 2020-04-07 (annotated)

Committer:
Pawel Zarembski
Date:
Tue Apr 07 12:55:42 2020 +0200
Revision:
0:01f31e923fe2
hani: DAPLink with reset workaround

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Pawel Zarembski 0:01f31e923fe2 1 /**
Pawel Zarembski 0:01f31e923fe2 2 * @file read_uid.c
Pawel Zarembski 0:01f31e923fe2 3 * @brief
Pawel Zarembski 0:01f31e923fe2 4 *
Pawel Zarembski 0:01f31e923fe2 5 * DAPLink Interface Firmware
Pawel Zarembski 0:01f31e923fe2 6 * Copyright (c) 2009-2016, ARM Limited, All Rights Reserved
Pawel Zarembski 0:01f31e923fe2 7 * SPDX-License-Identifier: Apache-2.0
Pawel Zarembski 0:01f31e923fe2 8 *
Pawel Zarembski 0:01f31e923fe2 9 * Licensed under the Apache License, Version 2.0 (the "License"); you may
Pawel Zarembski 0:01f31e923fe2 10 * not use this file except in compliance with the License.
Pawel Zarembski 0:01f31e923fe2 11 * You may obtain a copy of the License at
Pawel Zarembski 0:01f31e923fe2 12 *
Pawel Zarembski 0:01f31e923fe2 13 * http://www.apache.org/licenses/LICENSE-2.0
Pawel Zarembski 0:01f31e923fe2 14 *
Pawel Zarembski 0:01f31e923fe2 15 * Unless required by applicable law or agreed to in writing, software
Pawel Zarembski 0:01f31e923fe2 16 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
Pawel Zarembski 0:01f31e923fe2 17 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Pawel Zarembski 0:01f31e923fe2 18 * See the License for the specific language governing permissions and
Pawel Zarembski 0:01f31e923fe2 19 * limitations under the License.
Pawel Zarembski 0:01f31e923fe2 20 */
Pawel Zarembski 0:01f31e923fe2 21
Pawel Zarembski 0:01f31e923fe2 22 #include "stdbool.h"
Pawel Zarembski 0:01f31e923fe2 23
Pawel Zarembski 0:01f31e923fe2 24 #include "read_uid.h"
Pawel Zarembski 0:01f31e923fe2 25 #include "sam3u.h"
Pawel Zarembski 0:01f31e923fe2 26 #include "cortex_m.h"
Pawel Zarembski 0:01f31e923fe2 27
Pawel Zarembski 0:01f31e923fe2 28 bool unique_id_created = false;
Pawel Zarembski 0:01f31e923fe2 29 static uint32_t unique_id[4];
Pawel Zarembski 0:01f31e923fe2 30 void read_unique_id(uint32_t *id)
Pawel Zarembski 0:01f31e923fe2 31 {
Pawel Zarembski 0:01f31e923fe2 32 if (!unique_id_created) {
Pawel Zarembski 0:01f31e923fe2 33 create_unique_id();
Pawel Zarembski 0:01f31e923fe2 34 unique_id_created = true;
Pawel Zarembski 0:01f31e923fe2 35 }
Pawel Zarembski 0:01f31e923fe2 36
Pawel Zarembski 0:01f31e923fe2 37 id[0] = unique_id[0];
Pawel Zarembski 0:01f31e923fe2 38 id[1] = unique_id[1];
Pawel Zarembski 0:01f31e923fe2 39 id[2] = unique_id[2];
Pawel Zarembski 0:01f31e923fe2 40 id[3] = unique_id[3];
Pawel Zarembski 0:01f31e923fe2 41 }
Pawel Zarembski 0:01f31e923fe2 42
Pawel Zarembski 0:01f31e923fe2 43 __attribute__((section("ram_func")))
Pawel Zarembski 0:01f31e923fe2 44 void create_unique_id(void)
Pawel Zarembski 0:01f31e923fe2 45 {
Pawel Zarembski 0:01f31e923fe2 46 cortex_int_state_t state;
Pawel Zarembski 0:01f31e923fe2 47 state = cortex_int_get_and_disable();
Pawel Zarembski 0:01f31e923fe2 48 EFC0->EEFC_FMR |= (1UL << 16);
Pawel Zarembski 0:01f31e923fe2 49 EFC0->EEFC_FCR = 0x5A00000E;
Pawel Zarembski 0:01f31e923fe2 50
Pawel Zarembski 0:01f31e923fe2 51 /*Monitor FRDY*/
Pawel Zarembski 0:01f31e923fe2 52 while ((EFC0->EEFC_FSR & EEFC_FSR_FRDY) == EEFC_FSR_FRDY);
Pawel Zarembski 0:01f31e923fe2 53
Pawel Zarembski 0:01f31e923fe2 54 unique_id[0] = *(uint32_t *)0x80000;
Pawel Zarembski 0:01f31e923fe2 55 unique_id[1] = *(uint32_t *)0x80004;
Pawel Zarembski 0:01f31e923fe2 56 unique_id[2] = *(uint32_t *)0x80008;
Pawel Zarembski 0:01f31e923fe2 57 unique_id[3] = *(uint32_t *)0x8000C;
Pawel Zarembski 0:01f31e923fe2 58 EFC0->EEFC_FCR = 0x5A00000F;
Pawel Zarembski 0:01f31e923fe2 59
Pawel Zarembski 0:01f31e923fe2 60 /*Monitor FRDY*/
Pawel Zarembski 0:01f31e923fe2 61 while ((EFC0->EEFC_FSR & EEFC_FSR_FRDY) != EEFC_FSR_FRDY);
Pawel Zarembski 0:01f31e923fe2 62
Pawel Zarembski 0:01f31e923fe2 63 EFC0->EEFC_FMR &= ~(1UL << 16);
Pawel Zarembski 0:01f31e923fe2 64 cortex_int_restore(state);
Pawel Zarembski 0:01f31e923fe2 65 }