UART0 resource always busy after integrate MCU boot in our project

[Deus Matei [EMERSON]]

HI.

we're developing an application where we need to use 2 UART ports: UART: 0, 2, 3.

Before we added MCU boot in our project everything  worked well but after we integrated bootloader application cannot use the UART0. It's returning resource busy error every time when .

we try to transmit something. Configuration of UART 0 still works from application, only transmission fails.  

Snippet from prj.conf

config part for bootloader:

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

#Bootloader

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

CONFIG_BOOTLOADER_MCUBOOT=y

CONFIG_MCUBOOT_USE_ALL_AVAILABLE_RAM=y

CONFIG_MCUBOOT_IMG_MANAGER=y

# Enable MCUMGR

CONFIG_MCUMGR=y

# Enable MCUMGR management for both OS and Images

CONFIG_MCUMGR_GRP_OS=y

CONFIG_MCUMGR_GRP_IMG=y

# Configure MCUMGR transport to UART

CONFIG_MCUMGR_TRANSPORT_UART=y

# Dependencies

# Configure dependencies for CONFIG_MCUMGR  

CONFIG_NET_BUF=y

CONFIG_ZCBOR=y

CONFIG_CRC=y

# Configure dependencies for CONFIG_MCUMGR_GRP_IMG  

CONFIG_IMG_MANAGER=y

# Configure dependencies for CONFIG_IMG_MANAGER  

CONFIG_STREAM_FLASH=y

CONFIG_FLASH_MAP=y

# Configure dependencies for CONFIG_MCUMGR_TRANSPORT_UART

CONFIG_BASE64=y

CONFIG_BOARD_ENABLE_CPUNET=y

CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y

CONFIG_NRF53_UPGRADE_NETWORK_CORE=y

CONFIG_UPDATEABLE_IMAGE_NUMBER=2

CONFIG_ADD_MCUBOOT_MEDIATE_SIM_FLASH_DTS=y

# Enable the serial mcumgr transport.

CONFIG_UART_MCUMGR=y

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

There's certain action to do to free resources used by MCU boot?

[Menon]

Hello,

Thanks for sharing the details. Please update me with the results.

Kind Regards,

Abhijith

[Deus Matei [EMERSON]]

Hi, first I tried to assign uart2 to all zpehyr services in app.overlay. This solved my issue.

/ {
	chosen {
		nordic,pm-ext-flash = &mx25r64;
		nordic,nus-uart = &uart2;
        zephyr,console = &uart2;
		zephyr,shell-uart = &uart2;
		zephyr,uart-mcumgr = &uart2;
		zephyr,bt-mon-uart = &uart2;
		zephyr,bt-c2h-uart = &uart2;
	};
};

Another question, I'll need UART2 for a different purpose in the app so I plan to move them to UART1. My current issue with UART1 is that address range collides with I2C1. There's any way to assign a different address to the UART peripheric? 

[Deus Matei [EMERSON]]

Also because there's no mcuboot.overlay it will still use uart0 as DFU by wire? Please help to clarify this also.