Hi,
I'm interested in using Gazell and have managed to get the gzll_ack_payload Device & Host examples working successfully between a pair of nRF52840 devices on our custom development boards. I now wish to port the host & device across to boards fitted with nRF52811, but I'm having trouble at linking stage. I think it is something to do with the fact that the 52811 does not have a FPU. I get the following error several times when it tries to link in the Gazll library:
...proprietary_rf/gzll/gcc/gzll_nrf52_sd_resources_gcc.a(nrf_gzll.c.o) uses VFP register arguments, _build/nrf52811_xxaa.out does not
My gcc makefile looks like this:
PROJECT_NAME := gzll_ack_payload_host_nrf52811
TARGETS := nrf52811_xxaa
OUTPUT_DIRECTORY := _build
SDK_ROOT := ../../nRF5_SDK_15.3.0
$(OUTPUT_DIRECTORY)/nrf52811_xxaa.out: \
LINKER_SCRIPT := gzll_ack_payload_host_gcc_nrf52.ld
# Source files common to all targets
SRC_FILES += \
$(SDK_ROOT)/modules/nrfx/mdk/gcc_startup_nrf52811.S \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_backend_rtt.c \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_backend_serial.c \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_backend_uart.c \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_default_backends.c \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_frontend.c \
$(SDK_ROOT)/components/libraries/log/src/nrf_log_str_formatter.c \
$(SDK_ROOT)/components/boards/boards.c \
$(SDK_ROOT)/components/libraries/button/app_button.c \
$(SDK_ROOT)/components/libraries/util/app_error.c \
$(SDK_ROOT)/components/libraries/util/app_error_handler_gcc.c \
$(SDK_ROOT)/components/libraries/util/app_error_weak.c \
$(SDK_ROOT)/components/libraries/scheduler/app_scheduler.c \
$(SDK_ROOT)/components/libraries/timer/app_timer.c \
$(SDK_ROOT)/components/libraries/util/app_util_platform.c \
$(SDK_ROOT)/components/libraries/util/nrf_assert.c \
$(SDK_ROOT)/components/libraries/atomic/nrf_atomic.c \
$(SDK_ROOT)/components/libraries/balloc/nrf_balloc.c \
$(SDK_ROOT)/external/fprintf/nrf_fprintf.c \
$(SDK_ROOT)/external/fprintf/nrf_fprintf_format.c \
$(SDK_ROOT)/components/libraries/memobj/nrf_memobj.c \
$(SDK_ROOT)/components/libraries/ringbuf/nrf_ringbuf.c \
$(SDK_ROOT)/components/libraries/strerror/nrf_strerror.c \
$(SDK_ROOT)/integration/nrfx/legacy/nrf_drv_uart.c \
$(SDK_ROOT)/modules/nrfx/soc/nrfx_atomic.c \
$(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_gpiote.c \
$(SDK_ROOT)/modules/nrfx/drivers/src/prs/nrfx_prs.c \
$(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_uart.c \
$(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_uarte.c \
$(SDK_ROOT)/components/libraries/bsp/bsp.c \
main.c \
$(SDK_ROOT)/external/segger_rtt/SEGGER_RTT.c \
$(SDK_ROOT)/external/segger_rtt/SEGGER_RTT_Syscalls_GCC.c \
$(SDK_ROOT)/external/segger_rtt/SEGGER_RTT_printf.c \
$(SDK_ROOT)/modules/nrfx/mdk/system_nrf52811.c \
# Include folders common to all targets
INC_FOLDERS += \
$(SDK_ROOT)/components/proprietary_rf/gzll \
$(SDK_ROOT)/integration/nrfx \
$(PROJ_DIR) \
$(SDK_ROOT)/components/libraries/scheduler \
config \
$(SDK_ROOT)/components/libraries/experimental_section_vars \
$(SDK_ROOT)/modules/nrfx/mdk \
$(SDK_ROOT)/components/libraries/strerror \
$(SDK_ROOT)/components/boards \
$(SDK_ROOT)/components/drivers_nrf/nrf_soc_nosd \
$(SDK_ROOT)/components/libraries/button \
$(SDK_ROOT)/components/libraries/log \
$(SDK_ROOT)/modules/nrfx/hal \
$(SDK_ROOT)/components/libraries/log/src \
$(SDK_ROOT)/components/libraries/bsp \
$(SDK_ROOT)/integration/nrfx/legacy \
$(SDK_ROOT)/modules/nrfx/drivers/include \
$(SDK_ROOT)/components/libraries/ringbuf \
$(SDK_ROOT)/external/fprintf \
$(SDK_ROOT)/components/libraries/balloc \
$(SDK_ROOT)/components/libraries/util \
$(SDK_ROOT)/modules/nrfx \
$(SDK_ROOT)/components \
$(SDK_ROOT)/external/segger_rtt \
$(SDK_ROOT)/components/libraries/memobj \
$(SDK_ROOT)/components/libraries/atomic \
$(SDK_ROOT)/components/libraries/delay \
$(SDK_ROOT)/components/toolchain/cmsis/include \
$(SDK_ROOT)/components/libraries/timer \
.\
# Libraries common to all targets
LIB_FILES += \
$(SDK_ROOT)/components/proprietary_rf/gzll/gcc/gzll_nrf52_sd_resources_gcc.a \
# Optimization flags
OPT = -O3 -g3
# Uncomment the line below to enable link time optimization
#OPT += -flto
# C flags common to all targets
CFLAGS += $(OPT)
CFLAGS += -DBOARD_CUSTOM
CFLAGS += -DCONFIG_GPIO_AS_PINRESET
CFLAGS += -DFLOAT_ABI_SOFT
CFLAGS += -DGAZELL_ALTERNATIVE_RESOURCES
CFLAGS += -DGAZELL_PRESENT
CFLAGS += -DNRF52811_XXAA
CFLAGS += -DNRFX_COREDEP_DELAY_US_LOOP_CYCLES=3
CFLAGS += -DSWI_DISABLE0
CFLAGS += -DUSE_SD_HW_RESOURCES
CFLAGS += -mcpu=cortex-m4
CFLAGS += -mthumb -mabi=aapcs
CFLAGS += -Wall #-Werror no errors on warnings
CFLAGS += -mfloat-abi=soft
# keep every function in a separate section, this allows linker to discard unused ones
CFLAGS += -ffunction-sections -fdata-sections -fno-strict-aliasing
CFLAGS += -fno-builtin -fshort-enums
# C++ flags common to all targets
CXXFLAGS += $(OPT)
# Assembler flags common to all targets
ASMFLAGS += -g3
ASMFLAGS += -mcpu=cortex-m4
ASMFLAGS += -mthumb -mabi=aapcs
ASMFLAGS += -mfloat-abi=soft
ASMFLAGS += -DBOARD_CUSTOM
ASMFLAGS += -DCONFIG_GPIO_AS_PINRESET
ASMFLAGS += -DFLOAT_ABI_SOFT
ASMFLAGS += -DGAZELL_ALTERNATIVE_RESOURCES
ASMFLAGS += -DGAZELL_PRESENT
ASMFLAGS += -DNRF52811_XXAA
ASMFLAGS += -DNRFX_COREDEP_DELAY_US_LOOP_CYCLES=3
ASMFLAGS += -DSWI_DISABLE0
ASMFLAGS += -DUSE_SD_HW_RESOURCES
# Linker flags
LDFLAGS += $(OPT)
LDFLAGS += -mthumb -mabi=aapcs -L$(SDK_ROOT)/modules/nrfx/mdk -T$(LINKER_SCRIPT)
LDFLAGS += -mcpu=cortex-m4
# let linker dump unused sections
LDFLAGS += -Wl,--gc-sections
# use newlib in nano version
LDFLAGS += --specs=nano.specs
nrf52811_xxaa: CFLAGS += -D__HEAP_SIZE=2048
nrf52811_xxaa: CFLAGS += -D__STACK_SIZE=2048
nrf52811_xxaa: ASMFLAGS += -D__HEAP_SIZE=2048
nrf52811_xxaa: ASMFLAGS += -D__STACK_SIZE=2048
# Add standard libraries at the very end of the linker input, after all objects
# that may need symbols provided by these libraries.
LIB_FILES += -lc -lnosys -lm
.PHONY: default help
# Default target - first one defined
default: nrf52811_xxaa
# Print all targets that can be built
help:
@echo following targets are available:
@echo nrf52811_xxaa
@echo sdk_config - starting external tool for editing sdk_config.h
@echo flash - flashing binary
TEMPLATE_PATH := $(SDK_ROOT)/components/toolchain/gcc
include $(TEMPLATE_PATH)/Makefile.common
$(foreach target, $(TARGETS), $(call define_target, $(target)))
:
:
(Note: SDK_ROOT and 'config' are correct for my folder structure)
I also tried linking in gzll_nrf52_gcc.a instead of gzll_nrf52_sd_resources_gcc.a, but get the same errors. Unfortunately there is no 'PCA10056e' folder in the ack_payload example to get me going. Is it actually possible to run Gazell on the nRF52811 ?
I don't understand the USE_SD_HW_RESOURCES flag (that was in the PCA10056 / nRF52840 example), as there is no softdevice used/loaded into flash for Gazell (??)
Any help much appreciated. Thanks
