Closed AmruthaRMenon closed 1 year ago
Yes - see https://github.com/mcu-tools/mcuboot/pull/1536
You can increase the buffer sizes and then use the mtu option of mcumgr to transfer in larger chunks
Thanks,
I tried increasing the BOOT_SERIAL_MAX_RECEIVE_SIZE. The dfu time was reduced from 7minutes to 2minutes when I increased the BOOT_SERIAL_MAX_RECEIVE_SIZE from 512 to 1024 & mtu to 1024. But when I further increased the buffer size, there don't seem to be any further improvement. My attempt is is to bring the dfu time under 1minute.
My attempt is is to bring the dfu time under 1minute.
Probably not going to get that unless you change the UART baud rate
Is UART baud rate relevant if I am attempting USB DFU?
Is UART baud rate relevant if I am attempting USB DFU?
No, it should not be. You might need to see if changing mcuboot config (stack/buffer/workqueue sizes, flash write size) helps. A 4KB MTU is optimal for nRF52/nRF53 modules, though this would be 4KB of actual data to write, not 4KB of cbor data
I've submitted some fixes to mcuboot and performed some tests with a custom uploading program, with mcuboot in serial recovery mode (USB CDC) I was about to achieve upload speeds of 17.7KiBps, which would require about 21 seconds to upload a 370KiB application.
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Hi, I am working on nRF Connect SDK V2.0.0 for my project. I am using Mcuboot as my bootloader & I have implemented a usb DFU in Serial Recovery Mode based on DFU Timeout (CONFIG_BOOT_SERIAL_WAIT_FOR_DFU). Currently my app_update.bin file size is around 370kb and its taking around 7 minutes to complete this DFU via USB. Is there any solution to reduce this DFU timing?
Regards, Amrutha