nRF always landing in the non-existant ResetHandler

[Yatekii]

I have copied the blinky example:

/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
 *
 * The information contained herein is property of Nordic Semiconductor ASA.
 * Terms and conditions of usage are described in detail in NORDIC
 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
 *
 * Licensees are granted free, non-transferable use of the information. NO
 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
 * the file.
 *
 */

/** @file
 *
 * @defgroup blinky_example_main main.c
 * @{
 * @ingroup blinky_example
 * @brief Blinky Example Application main file.
 *
 * This file contains the source code for a sample application to blink LEDs.
 *
 */

#include <stdbool.h>
#include <stdint.h>
#include "nrf_delay.h"
#include "boards.h"

/**
 * @brief Function for application main entry.
 */
int main(void)
{
    /* Configure board. */
    bsp_board_leds_init();

    /* Toggle LEDs. */
    while (true)
    {
        for (int i = 0; i < LEDS_NUMBER; i++)
        {
            bsp_board_led_invert(i);
            nrf_delay_ms(500);
        }
    }
}

/**
 *@}
 **/

I edited the LEDs to fit my custom board:

#define LEDS_NUMBER    2

#define LED_START      17
#define BSP_LED_0      17
#define BSP_LED_1      19
#define LED_STOP       19

#define LEDS_ACTIVE_STATE 0

#define BSP_LED_0_MASK  (1<<BSP_LED_0)
#define BSP_LED_1_MASK  (1<<BSP_LED_1)

#define LEDS_INV_MASK  LEDS_MASK

#define LEDS_LIST {\
  BSP_LED_0,\
  BSP_LED_1\
}

And I use the Makefile provided by the SDK too:

PROJECT_NAME     := SWEG
TARGETS          := nrf52832_xxaa
OUTPUT_DIRECTORY := build

SDK_ROOT := ./nRF5_SDK
PROJ_DIR := ./src

$(OUTPUT_DIRECTORY)/nrf52832_xxaa.out: \
  LINKER_SCRIPT  := nrf52.ld

# Source files common to all targets
SRC_FILES += \
  $(PROJ_DIR)/main.c \
  $(SDK_ROOT)/components/libraries/log/src/nrf_log_backend_serial.c \
  $(SDK_ROOT)/components/libraries/log/src/nrf_log_frontend.c \
  $(SDK_ROOT)/components/libraries/button/app_button.c \
  $(SDK_ROOT)/components/libraries/util/app_error.c \
  $(SDK_ROOT)/components/libraries/util/app_error_weak.c \
  $(SDK_ROOT)/components/libraries/timer/app_timer.c \
  $(SDK_ROOT)/components/libraries/util/app_util_platform.c \
  $(SDK_ROOT)/components/libraries/crc16/crc16.c \
  $(SDK_ROOT)/components/libraries/fds/fds.c \
  $(SDK_ROOT)/components/libraries/fstorage/fstorage.c \
  $(SDK_ROOT)/components/libraries/hardfault/hardfault_implementation.c \
  $(SDK_ROOT)/components/libraries/util/nrf_assert.c \
  $(SDK_ROOT)/components/libraries/util/sdk_errors.c \
  $(SDK_ROOT)/components/libraries/util/sdk_mapped_flags.c \
  $(SDK_ROOT)/components/libraries/sensorsim/sensorsim.c \
  $(SDK_ROOT)/components/boards/boards.c \
  $(SDK_ROOT)/components/drivers_nrf/clock/nrf_drv_clock.c \
  $(SDK_ROOT)/components/drivers_nrf/common/nrf_drv_common.c \
  $(SDK_ROOT)/components/drivers_nrf/gpiote/nrf_drv_gpiote.c \
  $(SDK_ROOT)/components/drivers_nrf/uart/nrf_drv_uart.c \
  $(SDK_ROOT)/components/libraries/bsp/bsp.c \
  $(SDK_ROOT)/components/libraries/bsp/bsp_btn_ble.c \
  $(SDK_ROOT)/components/libraries/bsp/bsp_nfc.c \
  $(SDK_ROOT)/external/segger_rtt/RTT_Syscalls_GCC.c \
  $(SDK_ROOT)/external/segger_rtt/SEGGER_RTT.c \
  $(SDK_ROOT)/external/segger_rtt/SEGGER_RTT_printf.c \
  $(SDK_ROOT)/components/ble/common/ble_advdata.c \
  $(SDK_ROOT)/components/ble/ble_advertising/ble_advertising.c \
  $(SDK_ROOT)/components/ble/common/ble_conn_params.c \
  $(SDK_ROOT)/components/ble/common/ble_conn_state.c \
  $(SDK_ROOT)/components/ble/common/ble_srv_common.c \
  $(SDK_ROOT)/components/ble/peer_manager/gatt_cache_manager.c \
  $(SDK_ROOT)/components/ble/peer_manager/gatts_cache_manager.c \
  $(SDK_ROOT)/components/ble/peer_manager/id_manager.c \
  $(SDK_ROOT)/components/ble/peer_manager/peer_data.c \
  $(SDK_ROOT)/components/ble/peer_manager/peer_data_storage.c \
  $(SDK_ROOT)/components/ble/peer_manager/peer_database.c \
  $(SDK_ROOT)/components/ble/peer_manager/peer_id.c \
  $(SDK_ROOT)/components/ble/peer_manager/peer_manager.c \
  $(SDK_ROOT)/components/ble/peer_manager/pm_buffer.c \
  $(SDK_ROOT)/components/ble/peer_manager/pm_mutex.c \
  $(SDK_ROOT)/components/ble/peer_manager/security_dispatcher.c \
  $(SDK_ROOT)/components/ble/peer_manager/security_manager.c \
  $(SDK_ROOT)/components/toolchain/gcc/gcc_startup_nrf52.S \
  $(SDK_ROOT)/components/toolchain/system_nrf52.c \
  $(SDK_ROOT)/components/softdevice/common/softdevice_handler/softdevice_handler.c \

# Include folders common to all targets
INC_FOLDERS += \
  $(PROJ_DIR) \
  $(SDK_ROOT)/components/drivers_nrf/comp \
  $(SDK_ROOT)/components/drivers_nrf/twi_master \
  $(SDK_ROOT)/components/ble/ble_services/ble_ancs_c \
  $(SDK_ROOT)/components/ble/ble_services/ble_ias_c \
  $(SDK_ROOT)/components/libraries/pwm \
  $(SDK_ROOT)/components/softdevice/s132/headers/nrf52 \
  $(SDK_ROOT)/components/libraries/usbd/class/cdc/acm \
  $(SDK_ROOT)/components/libraries/usbd/class/hid/generic \
  $(SDK_ROOT)/components/libraries/usbd/class/msc \
  $(SDK_ROOT)/components/libraries/usbd/class/hid \
  $(SDK_ROOT)/components/libraries/log \
  $(SDK_ROOT)/components/ble/ble_services/ble_gls \
  $(SDK_ROOT)/components/libraries/fstorage \
  $(SDK_ROOT)/components/drivers_nrf/i2s \
  $(SDK_ROOT)/components/libraries/gpiote \
  $(SDK_ROOT)/components/drivers_nrf/gpiote \
  $(SDK_ROOT)/components/boards \
  $(SDK_ROOT)/components/drivers_nrf/common \
  $(SDK_ROOT)/components/ble/ble_advertising \
  $(SDK_ROOT)/components/drivers_nrf/adc \
  $(SDK_ROOT)/components/ble/ble_services/ble_bas_c \
  $(SDK_ROOT)/components/ble/ble_services/ble_hrs_c \
  $(SDK_ROOT)/components/libraries/queue \
  $(SDK_ROOT)/components/ble/ble_dtm \
  $(SDK_ROOT)/components/toolchain/cmsis/include \
  $(SDK_ROOT)/components/ble/ble_services/ble_rscs_c \
  $(SDK_ROOT)/components/drivers_nrf/uart \
  $(SDK_ROOT)/components/ble/common \
  $(SDK_ROOT)/components/ble/ble_services/ble_lls \
  $(SDK_ROOT)/components/drivers_nrf/wdt \
  $(SDK_ROOT)/components/libraries/bsp \
  $(SDK_ROOT)/components/ble/ble_services/ble_bas \
  $(SDK_ROOT)/components/libraries/experimental_section_vars \
  $(SDK_ROOT)/components/softdevice/s132/headers \
  $(SDK_ROOT)/components/ble/ble_services/ble_ans_c \
  $(SDK_ROOT)/components/libraries/slip \
  $(SDK_ROOT)/components/libraries/mem_manager \
  $(SDK_ROOT)/external/segger_rtt \
  $(SDK_ROOT)/components/libraries/csense_drv \
  $(SDK_ROOT)/components/drivers_nrf/hal \
  $(SDK_ROOT)/components/ble/ble_services/ble_nus_c \
  $(SDK_ROOT)/components/drivers_nrf/rtc \
  $(SDK_ROOT)/components/ble/ble_services/ble_ias \
  $(SDK_ROOT)/components/libraries/usbd/class/hid/mouse \
  $(SDK_ROOT)/components/drivers_nrf/ppi \
  $(SDK_ROOT)/components/ble/ble_services/ble_dfu \
  $(SDK_ROOT)/components/drivers_nrf/twis_slave \
  $(SDK_ROOT)/components \
  $(SDK_ROOT)/components/libraries/scheduler \
  $(SDK_ROOT)/components/ble/ble_services/ble_lbs \
  $(SDK_ROOT)/components/ble/ble_services/ble_hts \
  $(SDK_ROOT)/components/drivers_nrf/delay \
  $(SDK_ROOT)/components/libraries/crc16 \
  $(SDK_ROOT)/components/drivers_nrf/timer \
  $(SDK_ROOT)/components/libraries/util \
  $(SDK_ROOT)/components/drivers_nrf/pwm \
  $(SDK_ROOT)/components/libraries/usbd/class/cdc \
  $(SDK_ROOT)/components/libraries/csense \
  $(SDK_ROOT)/components/drivers_nrf/rng \
  $(SDK_ROOT)/components/libraries/low_power_pwm \
  $(SDK_ROOT)/components/libraries/hardfault \
  $(SDK_ROOT)/components/ble/ble_services/ble_cscs \
  $(SDK_ROOT)/components/libraries/uart \
  $(SDK_ROOT)/components/libraries/hci \
  $(SDK_ROOT)/components/libraries/usbd/class/hid/kbd \
  $(SDK_ROOT)/components/drivers_nrf/spi_slave \
  $(SDK_ROOT)/components/drivers_nrf/lpcomp \
  $(SDK_ROOT)/components/libraries/timer \
  $(SDK_ROOT)/components/drivers_nrf/power \
  $(SDK_ROOT)/components/libraries/usbd/config \
  $(SDK_ROOT)/components/toolchain \
  $(SDK_ROOT)/components/libraries/led_softblink \
  $(SDK_ROOT)/components/drivers_nrf/qdec \
  $(SDK_ROOT)/components/ble/ble_services/ble_cts_c \
  $(SDK_ROOT)/components/drivers_nrf/spi_master \
  $(SDK_ROOT)/components/ble/ble_services/ble_nus \
  $(SDK_ROOT)/components/ble/ble_services/ble_hids \
  $(SDK_ROOT)/components/drivers_nrf/pdm \
  $(SDK_ROOT)/components/libraries/crc32 \
  $(SDK_ROOT)/components/libraries/usbd/class/audio \
  $(SDK_ROOT)/components/libraries/sensorsim \
  $(SDK_ROOT)/components/ble/peer_manager \
  $(SDK_ROOT)/components/drivers_nrf/swi \
  $(SDK_ROOT)/components/ble/ble_services/ble_tps \
  $(SDK_ROOT)/components/ble/ble_services/ble_dis \
  $(SDK_ROOT)/components/device \
  $(SDK_ROOT)/components/ble/nrf_ble_qwr \
  $(SDK_ROOT)/components/libraries/button \
  $(SDK_ROOT)/components/libraries/usbd \
  $(SDK_ROOT)/components/drivers_nrf/saadc \
  $(SDK_ROOT)/components/ble/ble_services/ble_lbs_c \
  $(SDK_ROOT)/components/ble/ble_racp \
  $(SDK_ROOT)/components/toolchain/gcc \
  $(SDK_ROOT)/components/libraries/fds \
  $(SDK_ROOT)/components/libraries/twi \
  $(SDK_ROOT)/components/drivers_nrf/clock \
  $(SDK_ROOT)/components/ble/ble_services/ble_rscs \
  $(SDK_ROOT)/components/drivers_nrf/usbd \
  $(SDK_ROOT)/components/softdevice/common/softdevice_handler \
  $(SDK_ROOT)/components/ble/ble_services/ble_hrs \
  $(SDK_ROOT)/components/libraries/log/src \

# Libraries common to all targets
LIB_FILES += \

# C flags common to all targets
CFLAGS += -DNRF52
CFLAGS += -DNRF52_PAN_64
CFLAGS += -DSOFTDEVICE_PRESENT
CFLAGS += -DBOARD_CUSTOM
CFLAGS += -DNRF52832
CFLAGS += -DNRF52_PAN_12
CFLAGS += -DNRF52_PAN_58
CFLAGS += -DNRF52_PAN_54
CFLAGS += -DNRF52_PAN_31
CFLAGS += -DNRF52_PAN_51
CFLAGS += -DNRF52_PAN_36
CFLAGS += -DCONFIG_GPIO_AS_PINRESET
CFLAGS += -DBLE_STACK_SUPPORT_REQD
CFLAGS += -DNRF52_PAN_15
CFLAGS += -DNRF_SD_BLE_API_VERSION=3
CFLAGS += -DSWI_DISABLE0
CFLAGS += -DNRF52_PAN_20
CFLAGS += -DNRF52_PAN_55
CFLAGS += -DS132
CFLAGS += -mcpu=cortex-m4
CFLAGS += -mthumb -mabi=aapcs
CFLAGS += -Wall -Og -g3 #-Werror
CFLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
# keep every function in separate section, this allows linker to discard unused ones
CFLAGS += -ffunction-sections -fdata-sections -fno-strict-aliasing
CFLAGS += -fno-builtin --short-enums

# C++ flags common to all targets
CXXFLAGS += \

# Assembler flags common to all targets
ASMFLAGS += -x assembler-with-cpp
ASMFLAGS += -DNRF52
ASMFLAGS += -DNRF52_PAN_64
ASMFLAGS += -DSOFTDEVICE_PRESENT
ASMFLAGS += -DBOARD_CUSTOM
ASMFLAGS += -DNRF52832
ASMFLAGS += -DNRF52_PAN_12
ASMFLAGS += -DNRF52_PAN_58
ASMFLAGS += -DNRF52_PAN_54
ASMFLAGS += -DNRF52_PAN_31
ASMFLAGS += -DNRF52_PAN_51
ASMFLAGS += -DNRF52_PAN_36
ASMFLAGS += -DCONFIG_GPIO_AS_PINRESET
ASMFLAGS += -DBLE_STACK_SUPPORT_REQD
ASMFLAGS += -DNRF52_PAN_15
ASMFLAGS += -DNRF_SD_BLE_API_VERSION=3
ASMFLAGS += -DSWI_DISABLE0
ASMFLAGS += -DNRF52_PAN_20
ASMFLAGS += -DNRF52_PAN_55
ASMFLAGS += -DS132

# Linker flags
LDFLAGS += -mthumb -mabi=aapcs -L $(TEMPLATE_PATH) -T$(LINKER_SCRIPT)
LDFLAGS += -mcpu=cortex-m4
LDFLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
# let linker to dump unused sections
LDFLAGS += -Wl,--gc-sections
# use newlib in nano version
LDFLAGS += --specs=nano.specs -lc -lnosys


.PHONY: $(TARGETS) default all clean help flash flash_softdevice

# Default target - first one defined
default: nrf52832_xxaa

# Print all targets that can be built
help:
	@echo The following targets are available:
	@echo 	nrf52832_xxaa

TEMPLATE_PATH := $(SDK_ROOT)/components/toolchain/gcc

include $(TEMPLATE_PATH)/Makefile.common

$(foreach target, $(TARGETS), $(call define_target, $(target)))

# Flash the program
flash: $(OUTPUT_DIRECTORY)/nrf52832_xxaa.hex
	@echo Flashing: $<
	nrfjprog --program $< -f nrf52 --sectorerase
	nrfjprog --reset -f nrf52

# Flash softdevice
flash_softdevice:
	@echo Flashing: s132_nrf52_3.0.0_softdevice.hex
	nrfjprog --program $(SDK_ROOT)/components/softdevice/s132/hex/s132_nrf52_3.0.0_softdevice.hex -f nrf52 --sectorerase
	nrfjprog --reset -f nrf52

erase:
	nrfjprog --eraseall -f nrf52

The LEDs are on GPIOs 17 and 19. But the LEDs don't toggle at all.

When I use the debugger it always jumps into the ResetHandler and HardFaultHandler. But those handlers are non-existant somehow. After some jumps back and fourth through the handler calls. It starts over until finally after some loops it crashes at a weird address.

I don't feel like this is intended behavior ... I am very grateful for any help!

[Jørgen Holmefjord]

When you say your LEDs are on pins 20 and 22, you you mean the pin assignment number on the actual chip? You should use the pin name number (P0.xx) in your application. If a LED is connected to pin P0.20, you should set #define BSP_LED_0 20in your application.

[Yatekii]

No, of course I mean the physical pin number :) Otherwise I would write GPIO ;)

[Jørgen Holmefjord]

Yes, I had to check as the physical pin number depends on the package, it is more convenient to talk about GPIO pin number when talking about software ;) Also some users confuse the physical pin number of the chip with the GPIO pin number used in the application. Which Makefile do you use? Do you have a softdevice flashed to your chip?

[Yatekii]

That's okay :) sorry, I somehow just referred to physical ... I edited it to be GPIO numbers and added the makefile. I didn't specifically flash the softdevice, but I can't tell you with 100% guarantee :P

[Jørgen Holmefjord]

From the CFLAGS in your Makefile, it looks like you are using a Makefile for a blinky application running on a board having a softdevice present:

CFLAGS += -DSOFTDEVICE_PRESENT
CFLAGS += -DBLE_STACK_SUPPORT_REQD
CFLAGS += -DNRF_SD_BLE_API_VERSION=3
CFLAGS += -DS132

If you are using the linker-file found in the same directory, your RAM and FLASH settings might place your application in a region that the bootloader does not recognize. Your options then are:

1. Flash the softdevice (you can do this by running make flash_softdevice
2. Use a linker file with correct RAM/FLASH settings (you can use the file found in [SDK_ROOT]\examples\peripheral\blinky\pca10040\blank\armgcc\blinky_gcc_nrf52.ld)

Best regards,

Jørgen