Merge pull request #1177 from flit/feature/microbit_v2

micro:bit v2 board ID and nRF52833 target
pyocd · Jul 11, 2021 · 46a6c04 · 46a6c04
2 parents 2fc6cb7 + ac0433c
commit 46a6c04
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diff --git a/pyocd/board/board_ids.py b/pyocd/board/board_ids.py
@@ -262,6 +262,8 @@ def __init__(self, name, target, binary):
     "9014": BoardInfo(  "Seeed 96Boards Nitrogen", "nrf52",         "l1_nrf52-dk.bin",      ),
     "9900": BoardInfo(  "micro:bit",            "nrf51",            "l1_microbit.bin",      ),
     "9901": BoardInfo(  "micro:bit",            "nrf51",            "l1_microbit.bin",      ),
+    "9903": BoardInfo(  "micro:bit v2",         "nrf52833",         "microbitv2.bin",       ),
+    "9904": BoardInfo(  "micro:bit v2",         "nrf52833",         "microbitv2.bin",       ),
     "C004": BoardInfo(  "tinyK20",              "k20d50m",          "l1_k20d50m.bin",       ),
     "C006": BoardInfo(  "VBLUno51",             "nrf51",            "l1_nrf51.bin",         ),
 }
diff --git a/pyocd/target/builtin/__init__.py b/pyocd/target/builtin/__init__.py
@@ -59,6 +59,7 @@
 from . import target_LPC4330
 from . import target_nRF51822_xxAA
 from . import target_nRF52832_xxAA
+from . import target_nRF52833_xxAA
 from . import target_nRF52840_xxAA
 from . import target_STM32F103RC
 from . import target_STM32F051T8
@@ -172,7 +173,10 @@
           'mimxrt1170_cm7': target_MIMXRT1176xxxxx.MIMXRT1176xxxxx_CM7,
           'mimxrt1170_cm4': target_MIMXRT1176xxxxx.MIMXRT1176xxxxx_CM4,
           'nrf51': target_nRF51822_xxAA.NRF51,
+          'nrf51822': target_nRF51822_xxAA.NRF51,
           'nrf52': target_nRF52832_xxAA.NRF52832,
+          'nrf52832': target_nRF52832_xxAA.NRF52832,
+          'nrf52833': target_nRF52833_xxAA.NRF52833,
           'nrf52840' : target_nRF52840_xxAA.NRF52840,
           'stm32f103rc': target_STM32F103RC.STM32F103RC,
           'stm32f051': target_STM32F051T8.STM32F051,

diff --git a/pyocd/target/builtin/target_nRF52833_xxAA.py b/pyocd/target/builtin/target_nRF52833_xxAA.py
@@ -0,0 +1,204 @@
+# pyOCD debugger
+# Copyright (c) 2021 Chris Reed
+# 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.
+
+from ...core.memory_map import (FlashRegion, RamRegion, MemoryMap)
+from ..family.target_nRF52 import NRF52
+
+# Note: generated from nrf52xxx.flm from NordicSemiconductor.nRF_DeviceFamilyPack.8.38.0.pack
+FLASH_ALGO_FLASH = {
+    'load_address' : 0x20000000,
+
+    # Flash algorithm as a hex string
+    'instructions': [
+    0xe00abe00,
+    0x4614b5b0, 0x0504f240, 0x0500f2c0, 0xf8492000, 0xeb090005, 0xe9c10105, 0x60c80001, 0xf000b2d0,
+    0x2800fa55, 0xeb09bf1e, 0xe9c10105, 0xbdb00402, 0x0005eb09, 0x60412101, 0xfa1ef000, 0xbdb02000,
+    0x4604b510, 0xf0002000, 0xb138fa41, 0x0104f240, 0x0100f2c0, 0xe9c14449, 0xbd100402, 0x0004f240,
+    0x0000f2c0, 0x0100eb09, 0x29006889, 0x2000bf04, 0xf244bd10, 0xf2c20100, 0x22010100, 0xf859600a,
+    0x604a2000, 0x68424448, 0x6882608a, 0x68c060ca, 0x20006108, 0xbf00bd10, 0x0004f240, 0x0000f2c0,
+    0xf8492101, 0x44481000, 0xe9c02100, 0x60c11101, 0xba4cf000, 0x4604b5b0, 0x0504f240, 0x0500f2c0,
+    0xf8492002, 0xeb090005, 0x21000005, 0x1101e9c0, 0xf00060c1, 0xfbb4f99f, 0xfb01f1f0, 0xb1304010,
+    0x0005eb09, 0xe9c02103, 0x20651402, 0xeb09bdb0, 0x21010005, 0xf0006041, 0x42a0f9a3, 0xf000d813,
+    0x42a0f9a1, 0xeb09d90f, 0x21020005, 0x46206041, 0xf9c8f000, 0xbf1c2803, 0xbdb02067, 0xf0004620,
+    0x2000f9ff, 0xeb09bdb0, 0x21040005, 0x1402e9c0, 0xbdb02066, 0x41f0e92d, 0x460e4615, 0xf2404604,
+    0xf2c00704, 0x20030700, 0x0007f849, 0x0107eb09, 0xe9c12200, 0x60ca2201, 0xd00607a1, 0x0107eb09,
+    0x0402e9c1, 0xe8bd2065, 0xeb0981f0, 0x21010007, 0xf0006041, 0x42a0f965, 0xf000d815, 0x42a0f963,
+    0xeb09d911, 0x21030007, 0xeb066041, 0xf0000804, 0x4580f959, 0xeb09d90f, 0x21040007, 0x1802e9c0,
+    0xe8bd2066, 0xeb0981f0, 0x21040007, 0x1402e9c0, 0xe8bd2066, 0xeb0981f0, 0x21040007, 0xf0006041,
+    0xb130f96f, 0x0007eb09, 0x60812102, 0xe8bd2067, 0xeb0981f0, 0x21050007, 0x46206041, 0xf962f000,
+    0xd2072802, 0x0007eb09, 0xe9c02102, 0x20671402, 0x81f0e8bd, 0x4620d10f, 0x22ff4631, 0xf834f000,
+    0x2003b148, 0x0007f849, 0x0007eb09, 0x60412105, 0xe8bd2067, 0x200381f0, 0x0007f849, 0x0007eb09,
+    0x60412106, 0xebb02000, 0xbf080f96, 0x81f0e8bd, 0x0896ea4f, 0xf8542600, 0x30010026, 0xf855d10b,
+    0xf8440026, 0xf0000026, 0x3601f95b, 0x45462000, 0xe8bdd3f1, 0xeb0981f0, 0x19a10007, 0xe9c02205,
+    0x20682102, 0x81f0e8bd, 0x41f0e92d, 0x460d4616, 0xf2404604, 0xf2c00704, 0x20050700, 0x0007f849,
+    0x0007eb09, 0xe9c02100, 0x60c11101, 0xd00707a8, 0x0007eb09, 0xe9c02103, 0x20651502, 0x81f0e8bd,
+    0x0007eb09, 0x60412102, 0xf8caf000, 0xd81542a0, 0xf8c8f000, 0xd91142a0, 0x0007eb09, 0x60412103,
+    0x0804eb05, 0xf8bef000, 0xd90f4580, 0x0007eb09, 0xe9c02104, 0x20661802, 0x81f0e8bd, 0x0007eb09,
+    0xe9c02104, 0x20661402, 0x81f0e8bd, 0x0007eb09, 0x60412104, 0xbf042d00, 0xe8bd2000, 0x210081f0,
+    0xbf00e006, 0x20003101, 0xbf2842a9, 0x81f0e8bd, 0x42b05c60, 0xeb09d0f6, 0x44210007, 0xe9c02205,
+    0x20012102, 0x81f0e8bd, 0x41f0e92d, 0x460f4690, 0xf2404604, 0xf2c00504, 0x20040500, 0x0005f849,
+    0x0005eb09, 0xe9c02100, 0x60c11101, 0xd00807a0, 0x0005eb09, 0xe9c02103, 0x26651402, 0xe8bd4630,
+    0xeb0981f0, 0x21010005, 0xf0006041, 0x42a0f869, 0xf000d812, 0x42a0f867, 0xeb09d90e, 0x21030005,
+    0x193e6041, 0xf85ef000, 0xd90e4286, 0x0005eb09, 0xe9c02104, 0xe0041602, 0x0005eb09, 0xe9c02104,
+    0x26661402, 0xe8bd4630, 0xeb0981f0, 0x21040005, 0x20006041, 0x0f97ebb0, 0x08b8d00b, 0xbf002100,
+    0x2021f858, 0x42936823, 0x3101d10a, 0x42813404, 0xeb09d3f6, 0x21050005, 0x46306041, 0x81f0e8bd,
+    0x0005eb09, 0xe9c02106, 0x46201402, 0x81f0e8bd, 0x1030f240, 0x0000f2c1, 0x31016801, 0x6800bf1c,
+    0xf6404770, 0xf2cf70e0, 0x68410000, 0xf3617800, 0x4770200b, 0xf2c12010, 0x68010000, 0xbf143101,
+    0xf44f6800, 0x47705080, 0xf2c12014, 0x68010000, 0xbf143101, 0xf44f6800, 0x47707000, 0x47702000,
+    0x47702000, 0xf7ffb510, 0x4604ffe5, 0xffecf7ff, 0xbd104360, 0x42814401, 0x2001bf9c, 0xe0034770,
+    0xbf244288, 0x47702001, 0x2b04f850, 0xbf1c3201, 0x47702000, 0xbf00e7f4, 0xf7ffb580, 0x280fffb9,
+    0xbd80bf88, 0xfa012101, 0xf24cf000, 0x42104240, 0xf240bf1e, 0xf2c46008, 0x60010000, 0xbf00bd80,
+    0x47702000, 0x0104f243, 0xf24e6809, 0xf2c552db, 0x429112b1, 0x2003bf1c, 0xf2434770, 0x680a0108,
+    0x42822103, 0x2102bf88, 0x47704608, 0xbf842803, 0x47702069, 0xb240b580, 0xf851a105, 0xf24e0020,
+    0xf2c45104, 0x60080101, 0xf80af000, 0xbd802000, 0x00000000, 0x00000002, 0x00000001, 0x00000000,
+    0x4000f24e, 0x0001f2c4, 0x29006801, 0x4770d0fc, 0x500cf24e, 0x0001f2c4, 0x60012101, 0xbf00e7f0,
+    0x9000b081, 0xf24e9800, 0xf2c45108, 0x60080101, 0xe7e5b001, 0xf24eb580, 0xf2c45014, 0x21010001,
+    0xf7ff6001, 0x2000ffdd, 0xbf00bd80, 0xf7ffb570, 0x4604ff79, 0x20002500, 0xffa4f7ff, 0xd0052802,
+    0x2601b938, 0x42a52500, 0xe00dd306, 0x0008f243, 0x26006805, 0xd20742a5, 0xf7ff4628, 0xf7ffffd1,
+    0x4405ff49, 0xd3f742a5, 0xbf182e00, 0xffd2f7ff, 0xbd702000, 0x00000000, 0x00000000, 0x00000000,
+    0x00000000, 0x00000000
+    ],
+
+    # Relative function addresses
+    'pc_init': 0x20000005,
+    'pc_unInit': 0x20000045,
+    'pc_program_page': 0x20000139,
+    'pc_erase_sector': 0x200000b9,
+    'pc_eraseAll': 0x2000009d,
+
+    'static_base' : 0x20000000 + 0x00000004 + 0x00000594,
+    'begin_stack' : 0x200007a0,
+    'begin_data' : 0x20000000 + 0x1000,
+    'page_size' : 0x1000,
+    'analyzer_supported' : False,
+    'analyzer_address' : 0x00000000,
+    'page_buffers' : [0x20001000, 0x20002000],   # Enable double buffering
+    'min_program_length' : 0x1000,
+
+    # Relative region addresses and sizes
+    'ro_start': 0x0,
+    'ro_size': 0x594,
+    'rw_start': 0x594,
+    'rw_size': 0x4,
+    'zi_start': 0x598,
+    'zi_size': 0x10,
+
+    # Flash information
+    'flash_start': 0x0,
+    'flash_size': 0x200000,
+    'sector_sizes': (
+        (0x0, 0x1000),
+    )
+}
+
+# Note: generated from nrf52xxx_uicr.flm from NordicSemiconductor.nRF_DeviceFamilyPack.8.38.0.pack
+FLASH_ALGO_UICR = {
+    'load_address' : 0x20000000,
+
+    # Flash algorithm as a hex string
+    'instructions': [
+    0xe00abe00,
+    0x4614b570, 0x0604f240, 0x0600f2c0, 0xf8492500, 0xeb095006, 0xe9c00006, 0x60c55501, 0xf000b2d0,
+    0x2800f9fb, 0xeb09bf1e, 0xe9c10106, 0x46050402, 0xbd704628, 0x4604b510, 0xf0002000, 0xf240f9ed,
+    0xf2c00104, 0x44490100, 0xe9c1b110, 0xe0030402, 0x29006889, 0xbd10bf08, 0x0100f244, 0x0100f2c2,
+    0x600a2201, 0x0204f240, 0x0200f2c0, 0x3002f859, 0x444a604b, 0x608b6853, 0x60cb6893, 0x610a68d2,
+    0xbf00bd10, 0x0004f240, 0x0000f2c0, 0xf8492101, 0x44481000, 0xe9c02100, 0x60c11101, 0xb9f0f000,
+    0xf240b510, 0xf2c00004, 0x21020000, 0x1000f849, 0x24004448, 0x4401e9c0, 0xf00060c4, 0x4601f951,
+    0x2010f04f, 0xf00022ff, 0xb138f80f, 0xf9d8f000, 0x28694604, 0x2c00d004, 0x2400bf08, 0xbd104620,
+    0x46202400, 0xbf00bd10, 0xf240b5b0, 0xf2c00c04, 0x23050c00, 0x300cf849, 0x030ceb09, 0x0e00f04f,
+    0xee01e9c3, 0xe00cf8c3, 0xd0050783, 0x010ceb09, 0xe9c12203, 0xe00b2002, 0x0e0ceb09, 0xf8ce2301,
+    0x078b3004, 0xeb09d008, 0x2203000c, 0x2102e9c0, 0x0e65f04f, 0xbdb04670, 0x0e0ceb09, 0xf8ce2302,
+    0xf6413004, 0xf2c175ff, 0x42a80500, 0xeb09d905, 0x2204010c, 0x2002e9c1, 0xeb09e00d, 0x2403030c,
+    0xeb01605c, 0x1c6b0e00, 0xd908459e, 0x000ceb09, 0xe9c02104, 0xf04f1e02, 0x46700e66, 0xb151bdb0,
+    0xf04f2300, 0xbf000e00, 0x42955cc5, 0x3301d107, 0xd3f9428b, 0xf04fe00b, 0x46700e00, 0xeb09bdb0,
+    0x4418010c, 0xe9c12205, 0xf04f2002, 0x46700e01, 0xbf00bdb0, 0x41f0e92d, 0x46044615, 0x0604f240,
+    0x0600f2c0, 0xf8492003, 0xeb090006, 0x23000206, 0x3301e9c2, 0x078a60d3, 0xeb09d006, 0xe9c20206,
+    0x20650102, 0x81f0e8bd, 0x0006eb09, 0x60422202, 0x72fff641, 0x0200f2c1, 0xd9074294, 0x0006eb09,
+    0xe9c02104, 0x20661402, 0x81f0e8bd, 0x0006eb09, 0x60432303, 0x32011908, 0xd9074290, 0x0106eb09,
+    0xe9c12204, 0x20662002, 0x81f0e8bd, 0xebb02000, 0xd01a0f91, 0x0891ea4f, 0xe00b2700, 0x0027f855,
+    0x0027f844, 0xf902f000, 0x20003701, 0xbf284547, 0x81f0e8bd, 0x0027f854, 0xd0ef3001, 0x0006eb09,
+    0x220519e1, 0x2102e9c0, 0xe8bd2068, 0xbf0081f0, 0xf240b5b0, 0xf2c00504, 0x23040500, 0x3005f849,
+    0x0305eb09, 0xe9c32400, 0x60dc4401, 0xd0060783, 0x0105eb09, 0xe9c12203, 0x20652002, 0xeb09bdb0,
+    0x24010305, 0x078b605c, 0xeb09d006, 0x22030005, 0x2102e9c0, 0xbdb02065, 0x0305eb09, 0x605c2402,
+    0x7efff641, 0x0e00f2c1, 0xd9064570, 0x0105eb09, 0xe9c12204, 0x20662002, 0xeb09bdb0, 0x24030305,
+    0xeb01605c, 0xf10e0c00, 0x459c0301, 0xeb09d906, 0x21040005, 0x1c02e9c0, 0xbdb02066, 0x0305eb09,
+    0x605c2404, 0xebb32300, 0xbf040f91, 0xbdb04660, 0x0e91ea4f, 0xe0052100, 0x30043101, 0xbf244571,
+    0xbdb04660, 0x3021f852, 0x429c6804, 0xeb09d0f4, 0x22060105, 0x2002e9c1, 0x0000bdb0, 0x1030f240,
+    0x0000f2c1, 0x31016801, 0x6800bf1c, 0xf6404770, 0xf2cf70e0, 0x68410000, 0xf3617800, 0x4770200b,
+    0xf2c12010, 0x68010000, 0xbf143101, 0xf44f6800, 0x47705080, 0xf2c12014, 0x68010000, 0xbf143101,
+    0xf44f6800, 0x47707000, 0x47702000, 0x47702000, 0xf7ffb510, 0x4604ffe5, 0xffecf7ff, 0xbd104360,
+    0x42814401, 0x2001bf9c, 0xe0034770, 0xbf244288, 0x47702001, 0x2b04f850, 0xbf1c3201, 0x47702000,
+    0xbf00e7f4, 0xf7ffb580, 0x280fffb9, 0xbd80bf88, 0xfa012101, 0xf24cf000, 0x42104240, 0xf240bf1e,
+    0xf2c46008, 0x60010000, 0xbf00bd80, 0x47702000, 0x0104f243, 0xf24e6809, 0xf2c552db, 0x429112b1,
+    0x2003bf1c, 0xf2434770, 0x680a0108, 0x42822103, 0x2102bf88, 0x47704608, 0xbf842803, 0x47702069,
+    0xb240b580, 0xf851a105, 0xf24e0020, 0xf2c45104, 0x60080101, 0xf80af000, 0xbd802000, 0x00000000,
+    0x00000002, 0x00000001, 0x00000000, 0x4000f24e, 0x0001f2c4, 0x29006801, 0x4770d0fc, 0x500cf24e,
+    0x0001f2c4, 0x60012101, 0xbf00e7f0, 0x9000b081, 0xf24e9800, 0xf2c45108, 0x60080101, 0xe7e5b001,
+    0xf24eb580, 0xf2c45014, 0x21010001, 0xf7ff6001, 0x2000ffdd, 0xbf00bd80, 0xf7ffb570, 0x4604ff79,
+    0x20002500, 0xffa4f7ff, 0xd0052802, 0x2601b938, 0x42a52500, 0xe00dd306, 0x0008f243, 0x26006805,
+    0xd20742a5, 0xf7ff4628, 0xf7ffffd1, 0x4405ff49, 0xd3f742a5, 0xbf182e00, 0xffd2f7ff, 0xbd702000,
+    0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000
+    ],
+
+    # Relative function addresses
+    'pc_init': 0x20000005,
+    'pc_unInit': 0x20000039,
+    'pc_program_page': 0x200001b9,
+    'pc_erase_sector': 0x200000a5,
+    'pc_eraseAll': 0x20000089,
+
+    'static_base' : 0x20000000 + 0x00000004 + 0x000004e0,
+    'begin_stack' : 0x200006e8,
+    'begin_data' : 0x20000000 + 0x1000,
+    'page_size' : 0x1000,
+    'analyzer_supported' : False,
+    'analyzer_address' : 0x00000000,
+    'page_buffers' : [0x20001000, 0x20002000],   # Enable double buffering
+    'min_program_length' : 0x1000,
+
+    # Relative region addresses and sizes
+    'ro_start': 0x0,
+    'ro_size': 0x4e0,
+    'rw_start': 0x4e0,
+    'rw_size': 0x4,
+    'zi_start': 0x4e4,
+    'zi_size': 0x10,
+
+    # Flash information
+    'flash_start': 0x10001000,
+    'flash_size': 0x1000,
+    'sector_sizes': (
+        (0x0, 0x1000),
+    )
+}
+
+class NRF52833(NRF52):
+
+    MEMORY_MAP = MemoryMap(
+        FlashRegion(name="flash",   start=0x0,          length=0x80000,     blocksize=0x1000,
+                is_boot_memory=True,
+                algo=FLASH_ALGO_FLASH),
+        # User Information Configation Registers (UICR) as a flash region
+        FlashRegion(name="uicr",    start=0x10001000,   length=0x1000,      blocksize=0x400,
+                is_testable=False,
+                algo=FLASH_ALGO_UICR),
+        RamRegion(name="code_ram",  start=0x00800000,   length=0x20000,
+                alias="ram"),
+        RamRegion(name="ram",       start=0x20000000,   length=0x20000)
+        )
+
+    def __init__(self, session):
+        super().__init__(session, self.MEMORY_MAP)
diff --git a/scripts/generate_flash_algo.py b/scripts/generate_flash_algo.py
@@ -94,7 +94,7 @@
 """
 
 def str_to_num(val):
-    return int(val,0)  #convert string to number and automatically handle hex conversion
+    return int(val, 0)  #convert string to number and automatically handle hex conversion
 
 class PackFlashAlgoGenerator(PackFlashAlgo):
     """
@@ -137,15 +137,14 @@ def format_algo_data(self, spaces, group_size, fmt):
         else:
             raise Exception("Unsupported format %s" % fmt)
 
-    def process_template(self, template_text, output_path, data_dict=None):
+    def process_template(self, template_text, data_dict=None):
         """
         Generate output from the supplied template
 
         All the public methods and fields of this class can be accessed from
         the template via "algo".
 
         :param template_path: Relative or absolute file path to the template
-        :param output_path: Relative or absolute file path to create
         :param data_dict: Additional data to use when generating
         """
         if data_dict is None:
@@ -157,42 +156,55 @@ def process_template(self, template_text, output_path, data_dict=None):
         data_dict["algo"] = self
 
         template = jinja2.Template(template_text)
-        target_text = template.render(data_dict)
-
-        with open(output_path, "w") as file_handle:
-            file_handle.write(target_text)
+        return template.render(data_dict)
 
 def main():
     parser = argparse.ArgumentParser(description="Blob generator")
-    parser.add_argument("elf_path", help="Elf, axf, or flm to extract "
-                        "flash algo from")
-    parser.add_argument("--blob_start", default=0x20000000, type=str_to_num, help="Starting "
-                        "address of the flash blob.")
+    parser.add_argument("elf_path", help="Elf, axf, or flm to extract flash algo from")
+    parser.add_argument("--blob-start", default=0x20000000, type=str_to_num, help="Starting "
+                        "address of the flash blob in target RAM.")
+    parser.add_argument("--stack-size", default=STACK_SIZE, type=str_to_num, help="Stack size for the algo "
+                        f"(default {STACK_SIZE}).")
+    parser.add_argument("-i", "--info-only", action="store_true", help="Only print information about the flash "
+                        "algo, do not generate a blob.")
+    parser.add_argument("-o", "--output", default="pyocd_blob.py", help="Path of output file "
+                        "(default 'pyocd_blob.py').")
+    parser.add_argument("-t", "--template", help="Path to Jinja template file (default is an internal "
+                        "template for pyocd).")
     args = parser.parse_args()
+
+    if args.template:
+        with open(args.template, "r") as tmpl_file:
+            tmpl = tmpl_file.read()
+    else:
+        tmpl = PYOCD_TEMPLATE
 
     with open(args.elf_path, "rb") as file_handle:
         algo = PackFlashAlgoGenerator(file_handle)
 
         print(algo.flash_info)
 
-        # Allocate stack after algo and its rw data, rounded up.
-        SP = args.blob_start + HEADER_SIZE + algo.rw_start + algo.rw_size + STACK_SIZE
-        SP = (SP + 0x100 - 1) // 0x100 * 0x100
+        if args.info_only:
+            return
+
+        # Allocate stack after algo and its rw data, with top and bottom rounded to 8 bytes.
+        stack_base = args.blob_start + HEADER_SIZE + algo.rw_start + algo.rw_size
+        stack_base = (stack_base + 7) // 8 * 8
+        sp = stack_base + args.stack_size
+        sp = (sp + 7) // 8 * 8
 
         data_dict = {
             'name': os.path.splitext(os.path.split(args.elf_path)[-1])[0],
             'prog_header': BLOB_HEADER,
             'header_size': HEADER_SIZE,
             'entry': args.blob_start,
-            'stack_pointer': SP,
+            'stack_pointer': sp,
         }
 
-        tmpl_name_list = [
-            (PYOCD_TEMPLATE, "pyocd_blob.py"),
-        ]
-
-        for tmpl, name in tmpl_name_list:
-            algo.process_template(tmpl, name, data_dict)
+        text = algo.process_template(tmpl, data_dict)
+
+        with open(args.output, "w") as file_handle:
+            file_handle.write(text)
 
 
 if __name__ == '__main__':

diff --git a/test/data/binaries/microbitv2.bin b/test/data/binaries/microbitv2.bin