Not able to communicate with the Bootloader while using Serial recovery example on Custom board

[Tamizh]

Hi,

I've integrated the nRF52840 SoC with my custom board(IMX6-ULL). I want to implement the serial recovery method for DFU mentioned in this GitHub project created by one of the Nordic Members which I got from another  DevZone post.

https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/tree/main/bootloader_samples/serial_recovery/mcuboot_serial_recovery_uart

I'm able to implement both button-based and timing-based methods mentioned in the above link on the nRF52840DK without any problems. But while implementing the same on my board with a custom UART overlay, I'm unable to use mcumgr as it is giving an NMP timeout.

My board doesn't have a button for triggering recovery mode, so I tried the wait method and I can see that the Bootloader is waiting for 5 seconds(Specified wait time) before loading the application as expected. But this step not working

Any suggestions?

Thanks.

[Menon]

Hello,

Have you tried disabling the Mass storage?

Could you share  your connstring and type  in the mcumgr script ?And are you getting any error logs while doing this?

Kind Regards,

Abhijith

[Tamizh]

Hi,

Yes, I disabled the Mass Storage Mode. This is my connection profile

root@12050445:/real# ./mcumgr conn show
Connection profiles: 
  acm0: type=serial, connstring='dev=/dev/ttymxc6,baud=115200,mtu=512'

And this is the detailed error I'm getting while attaching the log-level flag for mcumgr

root@12050445:/real# ./mcumgr -l debug -c acm0 image list
DEBU[2023-03-11 13:44:33.457] Using connection profile: name=acm0 type=serial connstring=dev=/dev/ttymxc6,baud=115200,mtu=512 
DEBU[2023-03-11 13:44:33.46] {add-nmp-listener} [serial_sesn.go:213] seq=66 
DEBU[2023-03-11 13:44:33.463] Encoded &{NmpBase:{hdr:{Op:0 Flags:0 Len:0 Group:1 Seq:66 Id:0}}} to:
00000000  a0                                                |.| 
DEBU[2023-03-11 13:44:33.466] Encoded:
00000000  00 00 00 01 00 01 42 00  a0                       |......B..| 
DEBU[2023-03-11 13:44:33.468] Tx NMP request: 00000000  00 00 00 01 00 01 42 00  a0                       |......B..| 
DEBU[2023-03-11 13:44:33.469] Base64 encoding request:
00000000  00 00 00 01 00 01 42 00  a0                       |......B..| 
DEBU[2023-03-11 13:44:33.47] Tx serial
00000000  06 09                                             |..| 
DEBU[2023-03-11 13:44:33.471] Tx serial
00000000  41 41 73 41 41 41 41 42  41 41 46 43 41 4b 44 31  |AAsAAAABAAFCAKD1|
00000010  4d 77 3d 3d                                       |Mw==| 
DEBU[2023-03-11 13:44:33.472] Tx serial
00000000  0a                                                |.| 
DEBU[2023-03-11 13:44:43.478] {remove-nmp-listener} [serial_sesn.go:213] seq=66 
DEBU[2023-03-11 13:44:43.481] goroutine 1 [running]:
mynewt.apache.org/newt/util.NewNewtError(0x430596, 0xb, 0xb)
	/home/rently/go/pkg/mod/mynewt.apache.org/[email protected]/util/util.go:77 +0xa4
mynewt.apache.org/newt/util.ChildNewtError(0x4bf640, 0x200f8f8, 0x206aea0)
	/home/rently/go/pkg/mod/mynewt.apache.org/[email protected]/util/util.go:103 +0x74
mynewt.apache.org/newtmgr/newtmgr/cli.imageStateListCmd(0x207f040, 0x20c8520, 0x0, 0x4)
	/home/rently/go/pkg/mod/mynewt.apache.org/[email protected]/newtmgr/cli/image.go:103 +0x168
github.com/spf13/cobra.(*Command).execute(0x207f040, 0x20c8440, 0x4, 0x4, 0x207f040, 0x20c8440)
	/home/rently/go/pkg/mod/github.com/spf13/[email protected]/command.go:830 +0x1f4
github.com/spf13/cobra.(*Command).ExecuteC(0x207e640, 0x451d00, 0x2016940, 0x0)
	/home/rently/go/pkg/mod/github.com/spf13/[email protected]/command.go:914 +0x238
github.com/spf13/cobra.(*Command).Execute(...)
	/home/rently/go/pkg/mod/github.com/spf13/[email protected]/command.go:864
main.main()
	/home/rently/mynewt-mcumgr-cli/mcumgr/mcumgr.go:94 +0xd8

goroutine 7 [syscall]:
os/signal.signal_recv(0x0)
	/usr/local/go/src/runtime/sigqueue.go:168 +0x158
os/signal.loop()
	/usr/local/go/src/os/signal/signal_unix.go:23 +0x14
created by os/signal.Notify.func1.1
	/usr/local/go/src/os/signal/signal.go:151 +0x34

goroutine 9 [chan receive]:
main.main.func1(0x2016940)
	/home/rently/mynewt-mcumgr-cli/mcumgr/mcumgr.go:82 +0x34
created by main.main
	/home/rently/mynewt-mcumgr-cli/mcumgr/mcumgr.go:80 +0xd0

goroutine 10 [syscall]:
syscall.Syscall(0x3, 0x7, 0x20fc02d, 0xfd3, 0xdc250, 0x66cd7350, 0x72)
	/usr/local/go/src/syscall/asm_linux_arm.s:14 +0x8
syscall.read(0x7, 0x20fc02d, 0xfd3, 0xfd3, 0x0, 0x0, 0x0)
	/usr/local/go/src/syscall/zsyscall_linux_arm.go:686 +0x40
syscall.Read(...)
	/usr/local/go/src/syscall/syscall_unix.go:187
internal/poll.ignoringEINTRIO(...)
	/usr/local/go/src/internal/poll/fd_unix.go:581
internal/poll.(*FD).Read(0x2016fc0, 0x20fc02d, 0xfd3, 0xfd3, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:162 +0x118
os.(*File).read(...)
	/usr/local/go/src/os/file_posix.go:31
os.(*File).Read(0x200f768, 0x20fc02d, 0xfd3, 0xfd3, 0x1000, 0xa, 0xffffffff)
	/usr/local/go/src/os/file.go:117 +0x5c
github.com/tarm/serial.(*Port).Read(0x200f770, 0x20fc02d, 0xfd3, 0xfd3, 0x0, 0x0, 0x0)
	/home/rently/go/pkg/mod/github.com/tarm/[email protected]/serial_linux.go:138 +0x38
bufio.(*Scanner).Scan(0x20176c0, 0x0)
	/usr/local/go/src/bufio/scan.go:214 +0x88
mynewt.apache.org/newtmgr/nmxact/nmserial.(*SerialXport).Rx(0x2016f80, 0x20176c0, 0x0, 0x0, 0x0, 0x0)
	/home/rently/go/pkg/mod/mynewt.apache.org/[email protected]/nmxact/nmserial/serial_xport.go:304 +0xec
mynewt.apache.org/newtmgr/nmxact/nmserial.(*SerialXport).Start.func1(0x2016f80)
	/home/rently/go/pkg/mod/mynewt.apache.org/[email protected]/nmxact/nmserial/serial_xport.go:135 +0xd4
created by mynewt.apache.org/newtmgr/nmxact/nmserial.(*SerialXport).Start
	/home/rently/go/pkg/mod/mynewt.apache.org/[email protected]/nmxact/nmserial/serial_xport.go:127 +0xf8

goroutine 11 [select]:
mynewt.apache.org/newtmgr/nmxact/nmserial.(*SerialSesn).Open.func1(0x206aea0)
	/home/rently/go/pkg/mod/mynewt.apache.org/[email protected]/nmxact/nmserial/serial_sesn.go:101 +0xbc
created by mynewt.apache.org/newtmgr/nmxact/nmserial.(*SerialSesn).Open
	/home/rently/go/pkg/mod/mynewt.apache.org/[email protected]/nmxact/nmserial/serial_sesn.go:97 +0x1cc 
Error: NMP timeout

To add more context, when I flash the SMP_SVR example (from samples) the same mcumgr commands work (with the same port)  and I'm able to send mcumgr commands without a timeout; only with this serial recovery method, I get this timeout(loading from the bootloader).

I added a custom board overlay to the above project. Other than that, I haven't made any changes.

My custom overlay is,

&uart0 {
	current-speed = <115200>;
	status = "okay";
};



/ {
	chosen {
		zephyr,console = &uart0;
		zephyr,shell-uart = &uart0;
		zephyr,uart-mcumgr = &uart0;
		zephyr,bt-mon-uart = &uart1;
		zephyr,bt-c2h-uart = &uart1;
		zephyr,ot-uart = &uart0;
	};
};

&pinctrl {
	uart0_default: uart0_default {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 29)>,
					<NRF_PSEL(UART_RTS, 1, 13)>;
		};
		group2 {
			psels = <NRF_PSEL(UART_RX, 0, 31)>,
					<NRF_PSEL(UART_CTS, 1, 15)>;
			bias-pull-up;
		};
	};

	uart0_sleep: uart0_sleep {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 29)>,
				<NRF_PSEL(UART_RTS, 1, 13)>,
				<NRF_PSEL(UART_RX, 0, 31)>,
				<NRF_PSEL(UART_CTS, 1, 15)>;
			low-power-enable;
		};
	};

	uart1_me: uart1_me {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 9)>;
		};
		group2 {
			psels = <NRF_PSEL(UART_RX, 0, 10)>;
			bias-pull-up;
		};
	};

	uart1_sleep_me: uart1_sleep_me {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 9)>,
				<NRF_PSEL(UART_RX, 0, 10)>;
			low-power-enable;
		};
	};
};

&uart1 {
	status = "okay";
	current-speed = < 0x1c200 >;
	pinctrl-0 = < &uart1_me >;
	pinctrl-1 = < &uart1_sleep_me >;
	pinctrl-names = "default", "sleep";
};

mcuboot.conf

CONFIG_SIZE_OPTIMIZATIONS=y
CONFIG_SINGLE_APPLICATION_SLOT=y

# Enable MCUboot Serial Recovery
CONFIG_MCUBOOT_SERIAL=y
CONFIG_UART_CONSOLE=n

CONFIG_MCUBOOT_INDICATION_LED=y

CONFIG_BOOT_SERIAL_WAIT_FOR_DFU=y
CONFIG_BOOT_SERIAL_WAIT_FOR_DFU_TIMEOUT=5000

Thanks.