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/freescale/target_reset_mimxrt.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_mimxrt.c
Pawel Zarembski 0:01f31e923fe2 3 * @brief Target reset for the i.MX RT series
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 "info.h"
Pawel Zarembski 0:01f31e923fe2 24 #include "target_family.h"
Pawel Zarembski 0:01f31e923fe2 25 #include "cmsis_os2.h"
Pawel Zarembski 0:01f31e923fe2 26
Pawel Zarembski 0:01f31e923fe2 27 static void target_before_init_debug(void)
Pawel Zarembski 0:01f31e923fe2 28 {
Pawel Zarembski 0:01f31e923fe2 29 // This is for the hardware conflict (the EVK are not consider >2 debugger connection
Pawel Zarembski 0:01f31e923fe2 30 // situation) with another external debugger(such as JLINK). Before drag&pull, issue a
Pawel Zarembski 0:01f31e923fe2 31 // hardware reset to bring the platform to a known state and also force
Pawel Zarembski 0:01f31e923fe2 32 // RESET pin to high state ensure a successfully access.
Pawel Zarembski 0:01f31e923fe2 33 swd_set_target_reset(1);
Pawel Zarembski 0:01f31e923fe2 34 osDelay(5);
Pawel Zarembski 0:01f31e923fe2 35 swd_set_target_reset(0);
Pawel Zarembski 0:01f31e923fe2 36 osDelay(5);
Pawel Zarembski 0:01f31e923fe2 37 }
Pawel Zarembski 0:01f31e923fe2 38
Pawel Zarembski 0:01f31e923fe2 39 static void prerun_target_config(void)
Pawel Zarembski 0:01f31e923fe2 40 {
Pawel Zarembski 0:01f31e923fe2 41 // In some case the CPU will enter "cannot debug" state (low power, SWD pin mux changed, etc.).
Pawel Zarembski 0:01f31e923fe2 42 // Doing a hardware reset will clear those states (probably, depends on app). Also, if the
Pawel Zarembski 0:01f31e923fe2 43 // external flash's data is not a valid bootable image, DAPLink cannot attached to target. A
Pawel Zarembski 0:01f31e923fe2 44 // hardware reset will increase the chance to connect in this situation.
Pawel Zarembski 0:01f31e923fe2 45 target_set_state(RESET_RUN);
Pawel Zarembski 0:01f31e923fe2 46 }
Pawel Zarembski 0:01f31e923fe2 47
Pawel Zarembski 0:01f31e923fe2 48 static uint8_t validate_bin_nvic(const uint8_t *buf)
Pawel Zarembski 0:01f31e923fe2 49 {
Pawel Zarembski 0:01f31e923fe2 50 if(buf[0] == 'F' && buf[1] == 'C' && buf[2] == 'F' && buf[3] == 'B')
Pawel Zarembski 0:01f31e923fe2 51 {
Pawel Zarembski 0:01f31e923fe2 52 return 1;
Pawel Zarembski 0:01f31e923fe2 53 }
Pawel Zarembski 0:01f31e923fe2 54 else
Pawel Zarembski 0:01f31e923fe2 55 {
Pawel Zarembski 0:01f31e923fe2 56 return 0;
Pawel Zarembski 0:01f31e923fe2 57 }
Pawel Zarembski 0:01f31e923fe2 58 }
Pawel Zarembski 0:01f31e923fe2 59
Pawel Zarembski 0:01f31e923fe2 60 const target_family_descriptor_t g_nxp_mimxrt = {
Pawel Zarembski 0:01f31e923fe2 61 .family_id = kNXP_Mimxrt_FamilyID,
Pawel Zarembski 0:01f31e923fe2 62 .default_reset_type = kSoftwareReset,
Pawel Zarembski 0:01f31e923fe2 63 .soft_reset_type = VECTRESET,
Pawel Zarembski 0:01f31e923fe2 64 .target_before_init_debug = target_before_init_debug,
Pawel Zarembski 0:01f31e923fe2 65 .prerun_target_config = prerun_target_config,
Pawel Zarembski 0:01f31e923fe2 66 .validate_bin_nvic = validate_bin_nvic,
Pawel Zarembski 0:01f31e923fe2 67 };