MCUBoot serial download support

[jbrzozoski]

I was trying to make sense of the serial support in mcuboot, but it uses a protocol and format I don't recognize.  I expect they're generated by the Apache Newt tools, since that's where mcuboot is originally from.

Is there an example anywhere showing how to use a serial recovery bootloader with NRF/Zephyr applications?

[Sigurd]

Hi,

jbrzozoski said:

Is there an example anywhere showing how to use a serial recovery bootloader with NRF/Zephyr applications?

Yes, the sample in ~/ncs/zephyr/samples/subsys/mgmt/mcumgr/smp_svr

You need to set CONFIG_MCUMGR_SMP_UART=y,

# Allow for large Bluetooth data packets.
#CONFIG_BT_L2CAP_TX_MTU=260
#CONFIG_BT_RX_BUF_LEN=260

# Enable the Bluetooth and shell mcumgr transports.
#CONFIG_MCUMGR_SMP_BT=y
#CONFIG_MCUMGR_SMP_SHELL=y

#Enable the Uart mcumgr transports.
CONFIG_MCUMGR_SMP_UART=y

Might also need to set CONFIG_NET_BUF=y

Build and flash mcuboot, then build and flash the smp_svr(sign the image with imgtool.py)