WDT & Bootloader: Multiple definitions of `WDT_IRQHandler'

[Nick_RA]

So I'm trying top add a bootloader+DFU to allow f/w updates via UART on my custom  board.

I'm already successfully using WDT in my app. Now I'm looking down the rabbithole of trying to integrate code from docs and/or examples into my own...

Using the example secure_bootloader_uart as my template for DFU, I've added the nRF-Bootloader files & updated the user include directories. But it seems that the bootloader WDT is duplicating driver WDT

nrf_bootloader_wdt.o: In function `WDT_IRQHandler':
nrf_bootloader_wdt.c:73: multiple definition of `WDT_IRQHandler'
\modules\nrfx\drivers\src/nrfx_wdt.c:61: first defined here

I'm not even sure if I need WDT support? Because my custom board has no buttons or LEDs I'll be using sd_power_gpregret_set() followed by a NVIC_SystemReset() - won't that clear the WDT anyway?

[Hung Bui]

Hi Nick, 

I'm not so sure what you are planning to do.  If you want to add DFU support to your device you don't need to modify the application. 
Please follow the documentation or you can follow my step by step guide here.
The bootloader is compiled and flashed as separated application to your application. 

The bootloader handle WDT automatically, so you don't really need to do anything. (you don't need to integrate the bootloader code into your code)

[Nick_RA]

OK, that makes sense.

As I mentioned, I do need to trigger the DFU from my application though as these will be installed at remote online  locations, so I'll still need to set the gpregret register.

I may not be able to check out your guide for a few days but I will update this ticket when I do.

Thanks

Nick

[Hung Bui]

Hi Nick, 

In the guide, I have explained a little bit on how you can enter DFU mode from the application. 

You can also have a look at the buttonless example we have in the SDK: ble_app_buttonless_dfu

[Nick_RA]

OK so I've compiled & loaded the bootloader example (using uECC) and it advertises DFUTarg as expected. To be sure I performed Target>Erase All.

But the actual DFU fails with insufficient resource which is a bit strange as my application flash usage is only 39%

Is the example forcing dual bank update? I can't see where it may be set. I'm using the example bootloader <SDK>\examples\dfu\secure_bootloader\pca10040e_s112_ble with my custom board which has part nRF52832-QFAA-R7 which has 512kB flash.

[Hung Bui]

Hi Nick, 

Please get familiar with the DFU bootloader by following my step by step guide and try testing with an example before moving to your application. 

Please give exact size of the application, excluding the softdevice size. 

[Nick_RA]

I was following your guide. The ble secure bootloader example didn't compile as it was configured for button operation but no board or buttons were defined. So after changing the config I built & run the bootloader, then tried to load the blinky example by DFU and got the same error. The blinky project is tiny, so I concluded the error message was misleading and I was chasing a red hering down a rabbit hole.

I gave up after that, deleted the files and decided to try again using the UART DFU which works, at least with the ble_app_uart example application which will get me going for now.

I *think* in hindsight it was due to a mismatch in softdevices somewhere but I can't say 100% as the test projects I was using have been deleted now.

[Hung Bui]

Hi Nick, 

It's so strange that the bootloader didn't compile. Could you take a screenshot of the error ? 
Please show how you generate the blink sample and let us know how you update it via BLE DFU. 

I would assume having OTA DFU is your goal , not UART DFU ? 

[Nick_RA]

OK screenshot attached.

Actually I ultimately need both BLE & UART transports if possible but I would settle for one for the moment...

Back to BLE (as the uart examples don't include a softdevice)

After removing the button entry I can compile & load the bootloader secure_bootloader_ble_s112_pca10040e.

I then can build the project ble_app_uart_pca10040_s112, make zip file and upload it by DFU from nRF Connect. I verify it's advertiisng correctly afterwards so my methofology & keys are working.

But I still get insufficient resource using my hex file? The hex file is 282kB... I can send it if there is a way to do it privately?

[Hung Bui]

Hi Nick, 
Which chip are you working with ? 
I'm not so sure why you are testing with PCA10040e if you have nRF52832. 
I compiled the bootloader project here and saw no issue compiling. 
NRF_GPIO_PIN_SENSE_LOW is defined in nrf_gpio.h . Could you please double check ?  I would suggest to try testing on a fresh copy of nRF5 SDK. 

Could you show how you generate .zip file. And also show us the size of the application (either when compiling or show us the .bin file). 

I have converted the case to Private , you can upload your .hex and .zip here. 

[Nick_RA]

Hi. The only reason I'm using PCA10040e example is because that is the nearest as far as I can see that would fit. I'm using S112 with my nrf52832 but the PCA10040 examples in the SDK are all configured for S132.

I'm out today but should be able to take a look tomorrow.

Nick

[Hung Bui]

Hi Nick, 

Nick_RA said:

The only reason I'm using PCA10040e example is because that is the nearest as far as I can see that would fit.

I don't think it's a good idea. PCA10040e example is for emulating the nRF52810 on a nRF52832. This may explain why you receive  insufficient resource error. The nRF52810 has only 192kB of flash. 
Please have a look here: https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/index.html?cp=9_1_0

You will find this: 

If you want to use S112 with nRF52832 you should base on S132 example and then need to change the : 

- Preprocessor symbol to S112

- Start address of your application 

- Change the include directory of header file for S132 softdevice to S112 softdevice:

[Nick_RA]

Thanks for your patience, and sorry if I'm appearing a bit obtuse :/

Firstly, I've downloaded a fresh example and using "pca10040_s132_ble" (Segger) is giving the buttons not defined error when building when compiled as-is making no changes apart from replacing the dummy public key file. It's not an issue for me as I'm not using buttons anyway and it builds fine with the buttonless option removed.

On final (hopefully!) thing I don't really get is the memory addresses. Obviously one needs to set the addresses for the bootloader program itself to load & run, but I assume the bootloader needs to know the main application start address, which I can't see?

FYI, here's the Segger project file contents, this is the s132 bootloader being tweaked to s112

<!DOCTYPE CrossStudio_Project_File>
<solution Name="LPTB Bootloader" target="8" version="2">
  <project Name="LPTB _Bootloader">
    <configuration
      Name="Common"
      arm_architecture="v7EM"
      arm_core_type="Cortex-M4"
      arm_endian="Little"
      arm_fp_abi="Hard"
      arm_fpu_type="FPv4-SP-D16"
      arm_linker_heap_size="0"
      arm_linker_process_stack_size="0"
      arm_linker_stack_size="2048"
      arm_linker_treat_warnings_as_errors="No"
      arm_simulator_memory_simulation_parameter="RWX 00000000,00100000,FFFFFFFF;RWX 20000000,00010000,CDCDCDCD"
      arm_target_device_name="nRF52832_xxAA"
      arm_target_interface_type="SWD"
      c_preprocessor_definitions="BLE_STACK_SUPPORT_REQD;BOARD_PCA10040;CONFIG_GPIO_AS_PINRESET;FLOAT_ABI_HARD;INITIALIZE_USER_SECTIONS;NO_VTOR_CONFIG;NRF52;NRF52832_XXAA;NRF52_PAN_74;NRF_DFU_SETTINGS_VERSION=2;NRF_DFU_SVCI_ENABLED;NRF_SD_BLE_API_VERSION=7;S112;SOFTDEVICE_PRESENT;SVC_INTERFACE_CALL_AS_NORMAL_FUNCTION;uECC_ENABLE_VLI_API=0;uECC_OPTIMIZATION_LEVEL=3;uECC_SQUARE_FUNC=0;uECC_SUPPORT_COMPRESSED_POINT=0;uECC_VLI_NATIVE_LITTLE_ENDIAN=1"
      c_user_include_directories="../../config;../../../../../NRFSDK17_1_1/components/ble/common;../../../../../NRFSDK17_1_1/components/boards;../../../../../NRFSDK17_1_1/components/libraries/atomic;../../../../../NRFSDK17_1_1/components/libraries/atomic_fifo;../../../../../NRFSDK17_1_1/components/libraries/balloc;../../../../../NRFSDK17_1_1/components/libraries/bootloader;../../../../../NRFSDK17_1_1/components/libraries/bootloader/ble_dfu;../../../../../NRFSDK17_1_1/components/libraries/bootloader/dfu;../../../../../NRFSDK17_1_1/components/libraries/crc32;../../../../../NRFSDK17_1_1/components/libraries/crypto;../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/cc310;../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/cc310_bl;../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/cifra;../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/mbedtls;../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/micro_ecc;../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/nrf_hw;../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/nrf_sw;../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/oberon;../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/optiga;../../../../../NRFSDK17_1_1/components/libraries/delay;../../../../../NRFSDK17_1_1/components/libraries/experimental_section_vars;../../../../../NRFSDK17_1_1/components/libraries/fstorage;../../../../../NRFSDK17_1_1/components/libraries/log;../../../../../NRFSDK17_1_1/components/libraries/log/src;../../../../../NRFSDK17_1_1/components/libraries/mem_manager;../../../../../NRFSDK17_1_1/components/libraries/memobj;../../../../../NRFSDK17_1_1/components/libraries/queue;../../../../../NRFSDK17_1_1/components/libraries/ringbuf;../../../../../NRFSDK17_1_1/components/libraries/scheduler;../../../../../NRFSDK17_1_1/components/libraries/sha256;../../../../../NRFSDK17_1_1/components/libraries/stack_info;../../../../../NRFSDK17_1_1/components/libraries/strerror;../../../../../NRFSDK17_1_1/components/libraries/svc;../../../../../NRFSDK17_1_1/components/libraries/util;../../../../../NRFSDK17_1_1/components/softdevice/common;../../../../../NRFSDK17_1_1/components/softdevice/s112/headers;../../../../../NRFSDK17_1_1/components/softdevice/s112/headers/nrf52;../../../../../NRFSDK17_1_1/components/toolchain/cmsis/include;../..;../../../../../NRFSDK17_1_1/external/fprintf;../../../../../NRFSDK17_1_1/external/micro-ecc/micro-ecc;../../../../../NRFSDK17_1_1/external/nano-pb;../../../../../NRFSDK17_1_1/external/nrf_oberon;../../../../../NRFSDK17_1_1/external/nrf_oberon/include;../../../../../NRFSDK17_1_1/integration/nrfx;../../../../../NRFSDK17_1_1/modules/nrfx;../../../../../NRFSDK17_1_1/modules/nrfx/hal;../../../../../NRFSDK17_1_1/modules/nrfx/mdk;../config"
      debug_additional_load_file="../../../../../NRFSDK17_1_1/components/softdevice/s112/hex/s112_nrf52_7.2.0_softdevice.hex"
      debug_register_definition_file="../../../../../NRFSDK17_1_1/modules/nrfx/mdk/nrf52.svd"
      debug_start_from_entry_point_symbol="No"
      debug_target_connection="J-Link"
      gcc_debugging_level="Level 3"
      gcc_entry_point="Reset_Handler"
      linker_output_format="hex"
      linker_printf_fmt_level="long"
      linker_printf_width_precision_supported="Yes"
      linker_scanf_fmt_level="long"
      linker_section_placement_file="flash_placement.xml"
      linker_section_placement_macros="FLASH_PH_START=0x0;FLASH_PH_SIZE=0x80000;RAM_PH_START=0x20000000;RAM_PH_SIZE=0x10000;FLASH_START=0x19000;FLASH_SIZE=0x67000;RAM_START=0x200022c8;RAM_SIZE=0xdd38"
      linker_section_placements_segments="FLASH1 RX 0x0 0x80000;RAM1 RWX 0x20000000 0x10000;mbr_params_page RX 0x0007E000 0x1000;bootloader_settings_page RX 0x0007F000 0x1000;uicr_bootloader_start_address RX 0x10001014 0x4;uicr_mbr_params_page RX 0x10001018 0x4"
      macros="CMSIS_CONFIG_TOOL=../../../../../NRFSDK17_1_1/external_tools/cmsisconfig/CMSIS_Configuration_Wizard.jar"
      project_directory=""
      project_type="Executable" />
    <folder Name="Segger Startup Files">
      <file file_name="$(StudioDir)/source/thumb_crt0.s" />
    </folder>
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      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/log/src/nrf_log_str_formatter.c" />
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    <folder Name="nRF_Crypto backend uECC">
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      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/micro_ecc/micro_ecc_backend_ecdh.c" />
      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/crypto/backend/micro_ecc/micro_ecc_backend_ecdsa.c" />
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      <file file_name="../../../../../NRFSDK17_1_1/modules/nrfx/soc/nrfx_atomic.c" />
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    <folder Name="nRF_Oberon_Crypto">
      <file file_name="../../../../../NRFSDK17_1_1/external/nrf_oberon/lib/cortex-m4/hard-float/liboberon_3.0.8.a" />
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      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/crypto/nrf_crypto_ecdsa.c" />
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      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/crypto/nrf_crypto_shared.c" />
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    <folder Name="Application">
      <file file_name="../../main.c" />
      <file file_name="../config/sdk_config.h" />
      <file file_name="../../../Keys/public_key.c" />
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      <file file_name="../../../../../NRFSDK17_1_1/components/ble/common/ble_srv_common.c" />
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    <folder Name="nRF_Bootloader">
      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/bootloader/nrf_bootloader.c" />
      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/bootloader/nrf_bootloader_app_start.c" />
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    <folder Name="None">
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      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/bootloader/dfu/nrf_dfu.c" />
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      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/bootloader/dfu/nrf_dfu_handling_error.c" />
      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/bootloader/dfu/nrf_dfu_mbr.c" />
      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/bootloader/dfu/nrf_dfu_req_handler.c" />
      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/bootloader/dfu/nrf_dfu_settings.c" />
      <file file_name="../../../../../NRFSDK17_1_1/components/libraries/bootloader/dfu/nrf_dfu_settings_svci.c" />
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</solution>