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_nrf51.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.c
Pawel Zarembski 0:01f31e923fe2 3 * @brief Target reset for the nrf51
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 if (asserted) {
Pawel Zarembski 0:01f31e923fe2 30 swd_init_debug();
Pawel Zarembski 0:01f31e923fe2 31
Pawel Zarembski 0:01f31e923fe2 32 //Set POWER->RESET on NRF to 1
Pawel Zarembski 0:01f31e923fe2 33 if (!swd_write_ap(AP_TAR, 0x40000000 + 0x544)) {
Pawel Zarembski 0:01f31e923fe2 34 return;
Pawel Zarembski 0:01f31e923fe2 35 }
Pawel Zarembski 0:01f31e923fe2 36
Pawel Zarembski 0:01f31e923fe2 37 if (!swd_write_ap(AP_DRW, 1)) {
Pawel Zarembski 0:01f31e923fe2 38 return;
Pawel Zarembski 0:01f31e923fe2 39 }
Pawel Zarembski 0:01f31e923fe2 40
Pawel Zarembski 0:01f31e923fe2 41 //Hold RESET and SWCLK low for a minimum of 100us
Pawel Zarembski 0:01f31e923fe2 42 if(g_board_info.swd_set_target_reset){
Pawel Zarembski 0:01f31e923fe2 43 g_board_info.swd_set_target_reset(asserted);
Pawel Zarembski 0:01f31e923fe2 44 }
Pawel Zarembski 0:01f31e923fe2 45 PIN_SWCLK_TCK_CLR();
Pawel Zarembski 0:01f31e923fe2 46 PIN_SWDIO_TMS_CLR();
Pawel Zarembski 0:01f31e923fe2 47 //osDelay(1);
Pawel Zarembski 0:01f31e923fe2 48 } else {
Pawel Zarembski 0:01f31e923fe2 49 PIN_SWCLK_TCK_SET();
Pawel Zarembski 0:01f31e923fe2 50 PIN_SWDIO_TMS_SET();
Pawel Zarembski 0:01f31e923fe2 51 if(g_board_info.swd_set_target_reset){
Pawel Zarembski 0:01f31e923fe2 52 g_board_info.swd_set_target_reset(asserted);
Pawel Zarembski 0:01f31e923fe2 53 }
Pawel Zarembski 0:01f31e923fe2 54 }
Pawel Zarembski 0:01f31e923fe2 55 }
Pawel Zarembski 0:01f31e923fe2 56
Pawel Zarembski 0:01f31e923fe2 57 const target_family_descriptor_t g_nordic_nrf51 = {
Pawel Zarembski 0:01f31e923fe2 58 .family_id = kNordic_Nrf51_FamilyID,
Pawel Zarembski 0:01f31e923fe2 59 .default_reset_type = kSoftwareReset,
Pawel Zarembski 0:01f31e923fe2 60 .soft_reset_type = SYSRESETREQ,
Pawel Zarembski 0:01f31e923fe2 61 .swd_set_target_reset = swd_set_target_reset_nrf,
Pawel Zarembski 0:01f31e923fe2 62 };