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/family/nordic/target_reset_nrf52.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 target_reset_nrf52.c
Pawel Zarembski 0:01f31e923fe2 3 * @brief Target reset for the nrf52
Pawel Zarembski 0:01f31e923fe2 4 *
Pawel Zarembski 0:01f31e923fe2 5 * DAPLink Interface Firmware
Pawel Zarembski 0:01f31e923fe2 6 * Copyright (c) 2009-2019, 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 "swd_host.h"
Pawel Zarembski 0:01f31e923fe2 23 #include "DAP_config.h"
Pawel Zarembski 0:01f31e923fe2 24 #include "target_family.h"
Pawel Zarembski 0:01f31e923fe2 25 #include "target_board.h"
Pawel Zarembski 0:01f31e923fe2 26
Pawel Zarembski 0:01f31e923fe2 27 static void swd_set_target_reset_nrf(uint8_t asserted)
Pawel Zarembski 0:01f31e923fe2 28 {
Pawel Zarembski 0:01f31e923fe2 29 uint32_t ap_index_return;
Pawel Zarembski 0:01f31e923fe2 30
Pawel Zarembski 0:01f31e923fe2 31 if (asserted) {
Pawel Zarembski 0:01f31e923fe2 32 swd_init_debug();
Pawel Zarembski 0:01f31e923fe2 33
Pawel Zarembski 0:01f31e923fe2 34 swd_read_ap(0x010000FC, &ap_index_return);
Pawel Zarembski 0:01f31e923fe2 35 if (ap_index_return == 0x02880000) {
Pawel Zarembski 0:01f31e923fe2 36 // Have CTRL-AP
Pawel Zarembski 0:01f31e923fe2 37 swd_write_ap(0x01000000, 1); // CTRL-AP reset hold
Pawel Zarembski 0:01f31e923fe2 38 }
Pawel Zarembski 0:01f31e923fe2 39 else {
Pawel Zarembski 0:01f31e923fe2 40 // No CTRL-AP - Perform a soft reset
Pawel Zarembski 0:01f31e923fe2 41 // 0x05FA0000 = VECTKEY, 0x4 = SYSRESETREQ
Pawel Zarembski 0:01f31e923fe2 42 uint32_t swd_mem_write_data = 0x05FA0000 | 0x4;
Pawel Zarembski 0:01f31e923fe2 43 swd_write_memory(0xE000ED0C, (uint8_t *) &swd_mem_write_data, 4);
Pawel Zarembski 0:01f31e923fe2 44 }
Pawel Zarembski 0:01f31e923fe2 45 if(g_board_info.swd_set_target_reset){ //aditional reset
Pawel Zarembski 0:01f31e923fe2 46 g_board_info.swd_set_target_reset(asserted);
Pawel Zarembski 0:01f31e923fe2 47 }
Pawel Zarembski 0:01f31e923fe2 48 } else {
Pawel Zarembski 0:01f31e923fe2 49 swd_read_ap(0x010000FC, &ap_index_return);
Pawel Zarembski 0:01f31e923fe2 50 if (ap_index_return == 0x02880000) {
Pawel Zarembski 0:01f31e923fe2 51 // Device has CTRL-AP
Pawel Zarembski 0:01f31e923fe2 52 swd_write_ap(0x01000000, 0); // CTRL-AP reset release
Pawel Zarembski 0:01f31e923fe2 53 }
Pawel Zarembski 0:01f31e923fe2 54 else {
Pawel Zarembski 0:01f31e923fe2 55 // No CTRL-AP - Soft reset has been performed
Pawel Zarembski 0:01f31e923fe2 56 }
Pawel Zarembski 0:01f31e923fe2 57 if(g_board_info.swd_set_target_reset){
Pawel Zarembski 0:01f31e923fe2 58 g_board_info.swd_set_target_reset(asserted);
Pawel Zarembski 0:01f31e923fe2 59 }
Pawel Zarembski 0:01f31e923fe2 60 }
Pawel Zarembski 0:01f31e923fe2 61 }
Pawel Zarembski 0:01f31e923fe2 62
Pawel Zarembski 0:01f31e923fe2 63 const target_family_descriptor_t g_nordic_nrf52 = {
Pawel Zarembski 0:01f31e923fe2 64 .family_id = kNordic_Nrf52_FamilyID,
Pawel Zarembski 0:01f31e923fe2 65 .default_reset_type = kSoftwareReset,
Pawel Zarembski 0:01f31e923fe2 66 .soft_reset_type = SYSRESETREQ,
Pawel Zarembski 0:01f31e923fe2 67 .swd_set_target_reset = swd_set_target_reset_nrf,
Pawel Zarembski 0:01f31e923fe2 68 };