RE: printk on USB port nrf dongle

Amanda Hsieh — Fri, 29 Apr 2022 08:32:44 GMT

Hi,

I use your nrf52840dongle_nrf52840.overlay, this prj.conf

#
# Copyright (c) 2020 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

CONFIG_NCS_SAMPLES_DEFAULTS=y

CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_SERIAL=y
CONFIG_GPIO=y

# Make sure printk is not printing to the UART console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y


CONFIG_HEAP_MEM_POOL_SIZE=2048

CONFIG_ZIGBEE=y
CONFIG_ZIGBEE_APP_UTILS=y
CONFIG_ZIGBEE_ROLE_END_DEVICE=y

# Enable DK LED and Buttons library
CONFIG_DK_LIBRARY=y

# This example requires more workqueue stack
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Enable nRF ECB driver
CONFIG_CRYPTO=y
CONFIG_CRYPTO_NRF_ECB=y
CONFIG_CRYPTO_INIT_PRIORITY=80

# Cryptocell is not supported through CSPRNG driver API: NCSDK-4813
CONFIG_ENTROPY_CC3XX=n

# Enable API for powering down unused RAM parts
CONFIG_RAM_POWER_DOWN_LIBRARY=y

#Networking
CONFIG_NET_IPV6_MLD=n
CONFIG_NET_IPV6_NBR_CACHE=n
CONFIG_NET_IPV6_RA_RDNSS=n
CONFIG_NET_IP_ADDR_CHECK=n
CONFIG_NET_UDP=n

##############

CONFIG_USB_DEVICE_STACK=y
CONFIG_USB_DEVICE_DRIVER=y
CONFIG_USB_DEVICE_PRODUCT="Zephyr USB console sample"
CONFIG_USB_DEVICE_MANUFACTURER="Nordic Semiconductor ASA"
CONFIG_USB_DEVICE_VID=0x1915
CONFIG_USB_DEVICE_PID=0x0100

CONFIG_UART_LINE_CTRL=y
CONFIG_USB_CDC_ACM_LOG_LEVEL_OFF=y

# Since the default LOG_MODE_MINIMAL is synchronous, it will mess with the USB
# driver/subsys. Use the deferred mode instead.
CONFIG_LOG_MODE_DEFERRED=y

and adding the following in main.c

#include <sys/printk.h>
#include <usb/usb_device.h>
#include <drivers/uart.h>

BUILD_ASSERT(DT_NODE_HAS_COMPAT(DT_CHOSEN(zephyr_console), zephyr_cdc_acm_uart),
	     "Console device is not ACM CDC UART device");

void main(void)
{
	const struct device *dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_console));
	uint32_t dtr = 0;

	if (usb_enable(NULL)) {
		return;
	}

	/* Poll if the DTR flag was set */
	while (!dtr) {
		uart_line_ctrl_get(dev, UART_LINE_CTRL_DTR, &dtr);
		/* Give CPU resources to low priority threads. */
		k_sleep(K_MSEC(100));
	}

	int console_init(void);
	printk("hello world");

//----------------------------
	LOG_INF("Starting ZBOSS Light Switch example");

It can get both logging and printk as

Here is the project: devzone.nordicsemi.com/.../light_5F00_switch_5F00_zigbee_5F00_log_5F00_NCSv1.9.7z

Regards,
Amanda