Diff: source/family/nordic/target_reset_nrf52.c

Revision:

0:01f31e923fe2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/family/nordic/target_reset_nrf52.c	Tue Apr 07 12:55:42 2020 +0200
@@ -0,0 +1,68 @@
+/**
+ * @file    target_reset_nrf52.c
+ * @brief   Target reset for the nrf52
+ *
+ * DAPLink Interface Firmware
+ * Copyright (c) 2009-2019, 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 "swd_host.h"
+#include "DAP_config.h"
+#include "target_family.h"
+#include "target_board.h"
+
+static void swd_set_target_reset_nrf(uint8_t asserted)
+{
+    uint32_t ap_index_return;
+
+    if (asserted) {
+        swd_init_debug();
+
+        swd_read_ap(0x010000FC, &ap_index_return);
+        if (ap_index_return == 0x02880000) {
+            // Have CTRL-AP
+            swd_write_ap(0x01000000, 1);  // CTRL-AP reset hold
+        }
+        else {
+            // No CTRL-AP - Perform a soft reset
+            // 0x05FA0000 = VECTKEY, 0x4 = SYSRESETREQ
+            uint32_t swd_mem_write_data = 0x05FA0000 | 0x4;
+            swd_write_memory(0xE000ED0C, (uint8_t *) &swd_mem_write_data, 4);
+        }
+        if(g_board_info.swd_set_target_reset){ //aditional reset
+            g_board_info.swd_set_target_reset(asserted);
+        }
+    } else {
+        swd_read_ap(0x010000FC, &ap_index_return);
+        if (ap_index_return == 0x02880000) {
+            // Device has CTRL-AP
+            swd_write_ap(0x01000000, 0);  // CTRL-AP reset release
+        }
+        else {
+            // No CTRL-AP - Soft reset has been performed
+        }
+        if(g_board_info.swd_set_target_reset){
+            g_board_info.swd_set_target_reset(asserted);
+        }
+    }
+}
+
+const target_family_descriptor_t g_nordic_nrf52 = {
+    .family_id = kNordic_Nrf52_FamilyID,
+    .default_reset_type = kSoftwareReset,
+    .soft_reset_type = SYSRESETREQ,
+    .swd_set_target_reset = swd_set_target_reset_nrf,
+};