Mathias Brossard

Moving HICs to use CMSIS UART Drivers

3

Based on @flit's work on `lpc55xx`. Using `kl27z` as an example. (ping @gerargz, @microbit-carlos)

This saves `VFS_SECTOR_SIZE` (512) bytes of RAM by pre-computing all the fields that depend on the virtual disk which is known (`VFS_DISK_SIZE`) at compile-time.

Add nrf52840 HIC

1

Based on the nRF52820 HIC and efforts by @maxd-nordic.

- Fixes #1040 - Updates CI to use Arm GNU Toolchain version 13.2.Rel1 (builds on #1042)

Adding RTX5/CMSIS-RTOS2 was done in #750 / #580. Now we need to switch `armcc` to it and remove the old RTX4/CMSIS-RTOS1

Background: The file `source/daplink/drag-n-drop/iap_flash_intf.c` contains the implementation of the `flash_intf_t` interface to flash the probe in order to update the bootloader or interface firmware. One of the feature it contains...