Getting error app_uart.h: No such file or directory

[Shivek]

Hi,

I want to combine ble_app_blinky and uart_pca10056 examples to get the uart communication(between terminal emulator and application) in ble_app_blinky app. I followed this thread and added path for app_uart.h to makefile. But still I am getting this error. I am using nRF52840dk for hardware and nRF_SDK_15.0.0 with S140 softdevice for software with Segger Embedded Studio for ARM v5.32a. I have attached my makefile and sdk_config for reference.

PROJECT_NAME     := ble_app_blinky_pca10056_s140
TARGETS          := nrf52840_xxaa
OUTPUT_DIRECTORY := _build

SDK_ROOT := ../../../../../..
PROJ_DIR := ../../..

$(OUTPUT_DIRECTORY)/nrf52840_xxaa.out: \
  LINKER_SCRIPT  := ble_app_blinky_gcc_nrf52.ld

# Source files common to all targets
SRC_FILES += \
  $(SDK_ROOT)/modules/nrfx/mdk/gcc_startup_nrf52840.S \
  $(SDK_ROOT)/components/libraries/uart/app_uart_fifo.c \
  $(SDK_ROOT)/components/libraries/uart/retarget.c \
  $(SDK_ROOT)/components/libraries/fifo/app_fifo.c \
  $(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_backend_rtt.c \
  $(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_backend_serial.c \
  $(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_backend_uart.c \
  $(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_default_backends.c \
  $(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_frontend.c \
  $(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_str_formatter.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/hardfault/hardfault_implementation.c \
  $(SDK_ROOT)/components/libraries/util/nrf_assert.c \
  $(SDK_ROOT)/components/libraries/atomic_fifo/nrf_atfifo.c \
  $(SDK_ROOT)/components/libraries/atomic_flags/nrf_atflags.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/experimental_memobj/nrf_memobj.c \
  $(SDK_ROOT)/components/libraries/pwr_mgmt/nrf_pwr_mgmt.c \
  $(SDK_ROOT)/components/libraries/experimental_section_vars/nrf_section_iter.c \
  $(SDK_ROOT)/components/libraries/strerror/nrf_strerror.c \
  $(SDK_ROOT)/modules/nrfx/mdk/system_nrf52840.c \
  $(SDK_ROOT)/components/boards/boards.c \
  $(SDK_ROOT)/integration/nrfx/legacy/nrf_drv_clock.c \
  $(SDK_ROOT)/integration/nrfx/legacy/nrf_drv_uart.c \
  $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_clock.c \
  $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_gpiote.c \
  $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_power_clock.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 \
  $(PROJ_DIR)/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)/components/ble/common/ble_advdata.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/nrf_ble_gatt/nrf_ble_gatt.c \
  $(SDK_ROOT)/components/ble/nrf_ble_qwr/nrf_ble_qwr.c \
  $(SDK_ROOT)/components/ble/ble_services/ble_lbs/ble_lbs.c \
  $(SDK_ROOT)/components/softdevice/common/nrf_sdh.c \
  $(SDK_ROOT)/components/softdevice/common/nrf_sdh_ble.c \
  $(SDK_ROOT)/components/softdevice/common/nrf_sdh_soc.c \

# Include folders common to all targets
INC_FOLDERS += \
  $(SDK_ROOT)/components/nfc/ndef/generic/message \
  $(SDK_ROOT)/components/libraries/uart \
  $(SDK_ROOT)/components/nfc/t2t_lib \
  $(SDK_ROOT)/components/nfc/t4t_parser/hl_detection_procedure \
  $(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/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)/modules/nrfx/hal \
  $(SDK_ROOT)/components/libraries/experimental_log \
  $(SDK_ROOT)/components/ble/ble_services/ble_gls \
  $(SDK_ROOT)/components/libraries/fstorage \
  $(SDK_ROOT)/components/nfc/ndef/text \
  $(SDK_ROOT)/components/libraries/mutex \
  $(SDK_ROOT)/components/libraries/gpiote \
  $(SDK_ROOT)/components/libraries/experimental_log/src \
  $(SDK_ROOT)/components/libraries/bootloader/ble_dfu \
  $(SDK_ROOT)/components/nfc/ndef/connection_handover/common \
  $(SDK_ROOT)/components/boards \
  $(SDK_ROOT)/components/nfc/ndef/generic/record \
  $(SDK_ROOT)/components/libraries/experimental_memobj \
  $(SDK_ROOT)/components/nfc/t4t_parser/cc_file \
  $(SDK_ROOT)/components/ble/ble_advertising \
  $(SDK_ROOT)/components/ble/ble_services/ble_bas_c \
  $(SDK_ROOT)/modules/nrfx/drivers/include \
  $(SDK_ROOT)/components/libraries/experimental_task_manager \
  $(SDK_ROOT)/components/ble/ble_services/ble_hrs_c \
  $(SDK_ROOT)/components/softdevice/s140/headers/nrf52 \
  $(SDK_ROOT)/components/nfc/ndef/connection_handover/le_oob_rec \
  $(SDK_ROOT)/components/libraries/queue \
  $(SDK_ROOT)/components/libraries/pwr_mgmt \
  $(SDK_ROOT)/components/ble/ble_dtm \
  $(SDK_ROOT)/components/toolchain/cmsis/include \
  $(SDK_ROOT)/components/ble/ble_services/ble_rscs_c \
  $(SDK_ROOT)/components/ble/common \
  $(SDK_ROOT)/components/ble/ble_services/ble_lls \
  $(SDK_ROOT)/components/nfc/ndef/connection_handover/ac_rec \
  $(SDK_ROOT)/components/ble/ble_services/ble_bas \
  $(SDK_ROOT)/components/libraries/experimental_section_vars \
  $(SDK_ROOT)/components/ble/ble_services/ble_ans_c \
  $(SDK_ROOT)/components/libraries/slip \
  $(SDK_ROOT)/components/libraries/delay \
  $(SDK_ROOT)/components/libraries/experimental_mpu \
  $(SDK_ROOT)/components/libraries/mem_manager \
  $(SDK_ROOT)/components/libraries/csense_drv \
  $(SDK_ROOT)/components/ble/ble_services/ble_nus_c \
  $(SDK_ROOT)/components/libraries/usbd/config \
  $(SDK_ROOT)/components/softdevice/common \
  $(SDK_ROOT)/components/ble/ble_services/ble_ias \
  $(SDK_ROOT)/components/libraries/usbd/class/hid/mouse \
  $(SDK_ROOT)/components/libraries/low_power_pwm \
  $(SDK_ROOT)/components/nfc/ndef/conn_hand_parser/ble_oob_advdata_parser \
  $(SDK_ROOT)/components/ble/ble_services/ble_dfu \
  $(SDK_ROOT)/external/fprintf \
  $(SDK_ROOT)/components/libraries/atomic \
  $(SDK_ROOT)/components \
  $(SDK_ROOT)/components/libraries/scheduler \
  $(SDK_ROOT)/components/libraries/cli \
  $(SDK_ROOT)/components/ble/ble_services/ble_lbs \
  $(SDK_ROOT)/components/ble/ble_services/ble_hts \
  $(SDK_ROOT)/components/libraries/crc16 \
  $(SDK_ROOT)/components/nfc/t4t_parser/apdu \
  $(SDK_ROOT)/components/libraries/util \
  ../config \
  $(SDK_ROOT)/components/libraries/usbd/class/cdc \
  $(SDK_ROOT)/components/libraries/csense \
  $(SDK_ROOT)/components/libraries/balloc \
  $(SDK_ROOT)/components/libraries/ecc \
  $(SDK_ROOT)/components/libraries/hardfault \
  $(SDK_ROOT)/components/ble/ble_services/ble_cscs \
  $(SDK_ROOT)/components/libraries/hci \
  $(SDK_ROOT)/components/libraries/timer \
  $(SDK_ROOT)/components/softdevice/s140/headers \
  $(SDK_ROOT)/integration/nrfx \
  $(SDK_ROOT)/components/nfc/t4t_parser/tlv \
  $(SDK_ROOT)/components/libraries/sortlist \
  $(SDK_ROOT)/components/libraries/spi_mngr \
  $(SDK_ROOT)/components/libraries/experimental_stack_guard \
  $(SDK_ROOT)/components/libraries/led_softblink \
  $(SDK_ROOT)/components/nfc/ndef/conn_hand_parser \
  $(SDK_ROOT)/components/libraries/sdcard \
  $(SDK_ROOT)/components/nfc/ndef/parser/record \
  $(SDK_ROOT)/modules/nrfx/mdk \
  $(SDK_ROOT)/components/ble/ble_services/ble_cts_c \
  $(SDK_ROOT)/components/nfc/ndef/conn_hand_parser/le_oob_rec_parser \
  $(SDK_ROOT)/components/ble/ble_services/ble_nus \
  $(SDK_ROOT)/components/libraries/twi_mngr \
  $(SDK_ROOT)/components/ble/ble_services/ble_hids \
  $(SDK_ROOT)/components/libraries/strerror \
  $(SDK_ROOT)/components/libraries/crc32 \
  $(SDK_ROOT)/components/nfc/ndef/connection_handover/ble_oob_advdata \
  $(SDK_ROOT)/components/nfc/t2t_parser \
  $(SDK_ROOT)/components/nfc/ndef/connection_handover/ble_pair_msg \
  $(SDK_ROOT)/components/libraries/usbd/class/audio \
  $(SDK_ROOT)/components/nfc/t4t_lib/hal_t4t \
  $(SDK_ROOT)/components/nfc/t4t_lib \
  $(SDK_ROOT)/components/ble/peer_manager \
  $(SDK_ROOT)/components/drivers_nrf/usbd \
  $(SDK_ROOT)/components/ble/ble_services/ble_tps \
  $(SDK_ROOT)/components/nfc/ndef/parser/message \
  $(SDK_ROOT)/components/ble/ble_services/ble_dis \
  $(SDK_ROOT)/components/nfc/ndef/uri \
  $(SDK_ROOT)/components/ble/nrf_ble_gatt \
  $(SDK_ROOT)/components/ble/nrf_ble_qwr \
  $(SDK_ROOT)/components/libraries/gfx \
  $(SDK_ROOT)/components/libraries/button \
  $(SDK_ROOT)/modules/nrfx \
  $(SDK_ROOT)/components/libraries/twi_sensor \
  $(SDK_ROOT)/integration/nrfx/legacy \
  $(SDK_ROOT)/components/libraries/usbd/class/hid/kbd \
  $(SDK_ROOT)/components/nfc/ndef/connection_handover/ep_oob_rec \
  $(SDK_ROOT)/external/segger_rtt \
  $(SDK_ROOT)/components/libraries/atomic_fifo \
  $(SDK_ROOT)/components/libraries/fifo \
  $(SDK_ROOT)/components/libraries/experimental_ringbuf \
  $(SDK_ROOT)/components/ble/ble_services/ble_lbs_c \
  $(SDK_ROOT)/components/nfc/ndef/connection_handover/ble_pair_lib \
  $(SDK_ROOT)/components/libraries/crypto \
  $(SDK_ROOT)/components/ble/ble_racp \
  $(SDK_ROOT)/components/libraries/fds \
  $(SDK_ROOT)/components/nfc/ndef/launchapp \
  $(SDK_ROOT)/components/libraries/atomic_flags \
  $(SDK_ROOT)/components/ble/ble_services/ble_rscs \
  $(SDK_ROOT)/components/nfc/ndef/connection_handover/hs_rec \
  $(SDK_ROOT)/components/nfc/t2t_lib/hal_t2t \
  $(SDK_ROOT)/components/libraries/usbd \
  $(SDK_ROOT)/components/nfc/ndef/conn_hand_parser/ac_rec_parser \
  $(SDK_ROOT)/components/ble/ble_services/ble_hrs \

# Libraries common to all targets
LIB_FILES += \

# 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_PCA10056
CFLAGS += -DCONFIG_GPIO_AS_PINRESET
CFLAGS += -DFLOAT_ABI_HARD
CFLAGS += -DNRF52840_XXAA
CFLAGS += -DNRF_SD_BLE_API_VERSION=6
CFLAGS += -DS140
CFLAGS += -DSOFTDEVICE_PRESENT
CFLAGS += -DSWI_DISABLE0
CFLAGS += -mcpu=cortex-m4
CFLAGS += -mthumb -mabi=aapcs
CFLAGS += -Wall -Werror
CFLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
# 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=hard -mfpu=fpv4-sp-d16
ASMFLAGS += -DBOARD_PCA10056
ASMFLAGS += -DCONFIG_GPIO_AS_PINRESET
ASMFLAGS += -DFLOAT_ABI_HARD
ASMFLAGS += -DNRF52840_XXAA
ASMFLAGS += -DNRF_SD_BLE_API_VERSION=6
ASMFLAGS += -DS140
ASMFLAGS += -DSOFTDEVICE_PRESENT
ASMFLAGS += -DSWI_DISABLE0

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

nrf52840_xxaa: CFLAGS += -D__HEAP_SIZE=8192
nrf52840_xxaa: CFLAGS += -D__STACK_SIZE=8192
nrf52840_xxaa: ASMFLAGS += -D__HEAP_SIZE=8192
nrf52840_xxaa: ASMFLAGS += -D__STACK_SIZE=8192

# 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: nrf52840_xxaa

# Print all targets that can be built
help:
	@echo following targets are available:
	@echo		nrf52840_xxaa
	@echo		flash_softdevice
	@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)))

.PHONY: flash flash_softdevice erase

# Flash the program
flash: $(OUTPUT_DIRECTORY)/nrf52840_xxaa.hex
	@echo Flashing: $<
	nrfjprog -f nrf52 --program $< --sectorerase
	nrfjprog -f nrf52 --reset

# Flash softdevice
flash_softdevice:
	@echo Flashing: s140_nrf52_6.0.0_softdevice.hex
	nrfjprog -f nrf52 --program $(SDK_ROOT)/components/softdevice/s140/hex/s140_nrf52_6.0.0_softdevice.hex --sectorerase
	nrfjprog -f nrf52 --reset

erase:
	nrfjprog -f nrf52 --eraseall

SDK_CONFIG_FILE := ../config/sdk_config.h
CMSIS_CONFIG_TOOL := $(SDK_ROOT)/external_tools/cmsisconfig/CMSIS_Configuration_Wizard.jar
sdk_config:
	java -jar $(CMSIS_CONFIG_TOOL) $(SDK_CONFIG_FILE)

 5556.sdk_config.h

Thanks!

[Jared]

Hi,

If you're using SEGGER Embedded Studio then you need to modify the path inside SES not the makefile. The makefile is used when you use gcc.

regards

Jared

[Shivek]

Hi, thanks for your response. I figured that out, my code is compiling now. I configured UART, and its working. I started my application from ble_app_blinky example of nRF_SDK15.0.0. I wrote two functions for configuration and writing to UART. uart_config() is function for configuration and uart_tx() is to write to UART. The only thing is when I am calling function for UART in ble_evt_handler(), program is halted. This is my two function code:

void uart_config()
{
      uint32_t err_code;  
      uint8_t * tx_data = (uint8_t *)("\r\nUART CONFGED\r\n");
      
      
      const app_uart_comm_params_t comm_params =
      {
          RX_PIN_NUMBER,
          TX_PIN_NUMBER,
          RTS_PIN_NUMBER,
          CTS_PIN_NUMBER,
          UART_HWFC,
          false,
          NRF_UART_BAUDRATE_115200
      };

      APP_UART_FIFO_INIT(&comm_params,
                           UART_RX_BUF_SIZE,
                           UART_TX_BUF_SIZE,
                           uart_error_handle,
                           APP_IRQ_PRIORITY_LOWEST,
                           err_code);
      
      uart_tx(tx_data, 17);

      return;
}

void uart_tx(uint8_t *data, uint8_t bytes)
{
    uint8_t len = bytes;
    uint8_t i = 0;
    for(i=0; i<bytes; i++)
    {
        while(app_uart_put(data[i])!= NRF_SUCCESS);
    }
}

And this is where I want to put some strings on the UART (by calling uart_tx function only):

static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{
    ret_code_t err_code;

    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_CONNECTED:
            NRF_LOG_INFO("Connected");
            bsp_board_led_on(CONNECTED_LED);
            bsp_board_led_off(ADVERTISING_LED);
            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
            err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
            APP_ERROR_CHECK(err_code);
            err_code = app_button_enable();
            APP_ERROR_CHECK(err_code);
            break;
            ...

FYI I have enabled NRF_LOG module as well for debugging. And if I am calling uart_config in the main function then NRF_LOG_INFO will print it once only. Any subsequent calls to NRF_LOG_INFO will not get anything on the port. To be more clear, I am calling uart_config funciton in main before first NRF_LOG_INFO calls. This is how mymain lookd like:

int main(void)
{
    
    // Initialize.
    log_init();
    leds_init();
    timers_init();
    buttons_init();
    power_management_init();
    ble_stack_init();
    gap_params_init();
    gatt_init();
    services_init();
    advertising_init();
    conn_params_init();
    uart_config();
    
    // Start execution.
    NRF_LOG_INFO("Application started.");

    //printf("Advertising started\n\0");
    advertising_start();
    
    
    // Enter main loop.
    for (;;)
    { 
        idle_state_handle();
    }
}

I will really appreciate any insight into using UART, printf, and NRF_LOG_INFO.

[Jared]

Hi,

What are you using as a backend for the logger module?

regards

Jared 

[Jared]

Hi,

Yes by backend I was referring to what the logger module is using for outputting data, it's normally either UART or RTT. If you already use UART as the backend then it might conflict with your usage of UART in the application.

Regarding merging ble_app_blinky and the UART peripheral. I think the ble_app_uart example almost implements this, it should at least show you how you can use UART functionally in a ble example. Note that the ble_app_uart example uses RTT as backend while the ble_app_blinky uses UART. Maybe that example is more fitting for you?

regards

Jared