Daisy Seed somehow getting into a weird 'slow start' state, SCB_EnableDCache() seems to be involved

[TallMike]

Looks like it was a weird timing issue with the QSPI FLASH sometimes getting into Write Protect Mode: see end of this post:

Seed bootloader + dfu-util

Hi all, Since I ran out of code space, I went for installing the bootloader and executing from sram. Things worked for a while but lately dfu-util fails to erase qspi flash when programming. An excerpt follows: Device returned transfer size 4096 Warning: Overriding device-reported transfer size DfuSe interface name: "Flash " Downloading element to address = 0x90040000, size = 299848 Erase [ ] 0% 0 bytesdfu-util: Error during special command "ERASE_PAGE" …