nrf_dfu_transports_init() error in background dfu

[alex kim]

Hi,

I am using 

• PCA10056
• SDK 15.3.0
• Keil IDE
• The soft device is S140 
• JLinkRTTViewer for debug

I am testing background serial-dfu.(refer to https://devzone.nordicsemi.com/f/nordic-q-a/46336/bootloader-no-transport-dual-bank-dfu-and-dependencies)

I erase 52840 whole and write SoftDevice & bootloader.

I used keil debug to download the app and run.

An error occurred with the attachment.

Please advise

Alex

[Vidar Berg]

Hi Alex,

Looks like the error comes from the uart_dfu_transport_init() function in nrf_dfu_serial_uart.c. Please try to debug this function to find out what's returning the error. 

Best regards,

Vidar

[alex kim]

Hi Vidar,

1 ) It returns 0x08 from nrf_dfu_transport_init (dfu_observer).

      An error occurred with the attachment.

2) I set NRF_LOG_ENABLE to 1 in the bootloader and the application.

     The bootloader prints messages well, but the application does not print them.

     Please advise.

[Vidar Berg]

Hi Alex,

1. uart_dfu_transport_init() is  called by nrf_dfu_transport_init().

2. This is a known limitation. The RTT buffer holding the log messages is not linked to a fixed address in RAM, so the buffer will get moved around when you jump between different applications. The problem is that the debugger will not detect that the buffer has been moved. The easiest workaround may be to enable the UART logger backend in your application. So you use RTT for the bootloader and UART for the app. The other option is to link this buffer to the same address both in your bootloader and application project.

[alex kim]

Hi Vidar,

1. We use a single serial port to communicate with the server and do a background dfu at the same time.
After executing app_uart () function in main (), dfu_init () is executed.
I run init 2 times on a single uart, so I think the above error occurs
Am I correct?
How should uart_init () be changed if server communication and background dfu are executed simultaneously with one uart?

2. I commented app_uart () in main () and ran the program
Please advise me why I am getting a 'cache too small error'?
I added a log file

Fullscreen dfu-in-app-200210.log Download

# SEGGER J-Link RTT Viewer V6.52e Terminal Log File
# Compiled: 12:19:47 on Oct 16 2019
# Logging started @ 10 Feb 2020 20:40:03

00> <info> app: Initializing fds...
00> 
00> <info> app: Reading flash usage statistics...
00> 
00> <info> app: Found 1 valid records.
00> 
00> <info> app: Found 0 dirty records (ready to be garbage collected).
00> 
00> <info> app: Setup Config file found, updating boot count to 8.
00> 
00> <info> app: Load Config file found, updating boot count to 9.
00> 
00> <info> app: Reset Config file found, updating boot count to 9.
00> 
00> 
00> <error> app: Bootloader start address is not set
00> 
00> <debug> nrf_dfu_settings: Calling nrf_dfu_settings_init()...
00> 
00> <debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
00> 
00> <warning> nrf_dfu_settings: Resetting bootloader settings since neither the settings page nor the backup are valid (CRC error).
00> 
00> <warning> nrf_dfu_settings: Settings write aborted since it tries writing to forbidden settings.
00> 
00> <error> nrf_dfu_settings: nrf_dfu_settings_write_and_backup() failed with error: F
00> 
00> ed
00> 
00> <info> app: NRF_DFU_EVT_TRANSPORT_ACTIVATED
00> 
00> <debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
00> 
00> <info> app: Application version 0
00> 
00> <debug> ble_scan: Filter set on address type 1, address 0x
00> 
00> <debug> ble_scan: D7
00> 
00> <debug> ble_scan: D7
00> 
00> <info> nrf_dfu_serial: nrf_dfu_serial_on_packet_received
00> 
00> <debug> nrf_dfu_serial: Received ping 1
00> 
00> <info> nrf_dfu_serial_uart: Allocated buffer 2000B078
00> 
00> <debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_PING
00> 
00> <debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
00> 
00> <debug> nrf_dfu_serial: Sending Response: [0x9, 0x1]
00> 
00> <info> nrf_dfu_serial: nrf_dfu_serial_on_packet_received
00> 
00> <debug> nrf_dfu_serial: Set receipt notif target: 0
00> 
00> <info> nrf_dfu_serial_uart: Allocated buffer 2000B078
00> 
00> <debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_RECEIPT_NOTIF_SET
00> 
00> <debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
00> 
00> <debug> nrf_dfu_serial: Sending Response: [0x2, 0x1]
00> 
00> <info> nrf_dfu_serial: nrf_dfu_serial_on_packet_received
00> 
00> <debug> nrf_dfu_serial: Received serial mtu
00> 
00> <info> nrf_dfu_serial_uart: Allocated buffer 2000B078
00> 
00> <debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_MTU_GET
00> 
00> <debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
00> 
00> <debug> nrf_dfu_serial: Sending Response: [0x7, 0x1]
00> 
00> <info> nrf_dfu_serial: nrf_dfu_serial_on_packet_received
00> 
00> <info> nrf_dfu_serial_uart: Allocated buffer 2000B078
00> 
00> <debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_SELECT (command)
00> 
00> <debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
00> 
00> <debug> nrf_dfu_serial: Sending Response: [0x6, 0x1]
00> 
00> <info> nrf_dfu_serial: nrf_dfu_serial_on_packet_received
00> 
00> <debug> app: Shutting down transports (found: 1)
00> 
00> <info> nrf_dfu_serial_uart: Allocated buffer 2000B078
00> 
00> mmand)
00> 
00> <info> app: NRF_DFU_EVT_DFU_STARTED
00> 
00> <debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
00> 
00> <debug> nrf_dfu_serial: Sending Response: [0x1, 0x1]
00> 
00> <info> nrf_dfu_serial: nrf_dfu_serial_on_packet_received
00> 
00> <info> nrf_dfu_serial_uart: Allocated buffer 2000B0FC
00> 
00> <debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (command)
00> 
00> <debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
00> 
00> <info> nrf_dfu_serial: nrf_dfu_serial_on_packet_received
00> 
00> <info> nrf_dfu_serial_uart: Allocated buffer 2000B078
00> 
00> <debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (command)
00> 
00> <debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
00> 
00> <info> nrf_dfu_serial: nrf_dfu_serial_on_packet_received
00> 
00> <info> nrf_dfu_serial_uart: Allocated buffer 2000B0FC
00> 
00> <debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (command)
00> 
00> <debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
00> 
00> <info> nrf_dfu_serial: nrf_dfu_serial_on_packet_received
00> 
00> <info> nrf_dfu_serial_uart: Allocated buffer 2000B0FC
00> 
00> <debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_CRC_GET (command)
00> 
00> <debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
00> 
00> <debug> nrf_dfu_serial: Sending Response: [0x3, 0x1]
00> 
00> <info> nrf_dfu_serial: nrf_dfu_serial_on_packet_received
00> 
00> <info> nrf_dfu_serial_uart: Allocated buffer 2000B0FC
00> 
00> <debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_EXECUTE (command)
00> 
00> <debug> nrf_dfu_validation: PB: Init packet data len: 64
00> 
00> <info> nrf_dfu_validation: Signature required. Checking signature.
00> 
00> <info> nrf_dfu_validation: Calculating hash (len: 64)
00> 
00> <info> nrf_dfu_validation: Verify signature
00> 
00> <info> nrf_dfu_validation: Image verified
00> 
00> <debug> app: Enter nrf_dfu_cache_prepare()
00> 
00> <debug> app: required_size: 0x29BD0.
00> 
00> <debug> app: single_bank: false.
00> 
00> <debug> app: keep_app: true.
00> 
00> <debug> app: keep_softdevice: true.
00> 
00> <debug> app: SD_PRESENT: true.
00> 
00> <debug> app: Bank contents:
00> 
00> <debug> app: Bank 0 code: 0x00: Size: 0x0
00> 
00> <debug> app: Bank 1 code: 0x00: Size: 0x0
00> 
00> <debug> app: pass: 0.
00> 
00> <debug> app: cache_address: 0x26000.
00> 
00> <debug> app: cache_too_small: false.
00> 
00> 0xA
00> 
00> 
00> 

[Vidar Berg]

Hi,

1. Yes, the driver will return the invalid state error if you try to init the same UART twice. 

2.  Notice it says "cache_too_small: false". So it is enough cache to store the new image.  However, "cache_address" is wrong. It should start at bank 1, not bank 0 where the current application resides.