• Getting started: we're compiling Nim to .elf and .bin; but it doesn't yet appear to run.

• start writing/wrapping drivers:

• RTC
• GPIO

• see if we can get a gdb debug channel (USB? SWD? ...)
• ✓ blink an LED (commit 3d4349df)
• ✓ establish a bootloader (Adafruit nRF52-derived bootloader was pre-installed
• ✓ get arm-none-eabi-gcc cross-compile build working.
• ✓ get an SVD file for the nRF52840, run minisvd2nim on it.

• Create a real-time embedded software project in Nim.
• Use the Awsm framework for event-driven concurrency.
• Create a hardware-accelerated scheduler.
• Stream digital voice over LoRa radio packets (not necessarily real time).

• Hardware
• Armv7m Architecture Reference Manual
• ARM Cortex-M4 Technical Reference Manual r0p1
• Nordic nRF52840 Product Specification v1.11
• SDK: nRF5_SDK_17.1.0_ddde560.zip
• RAK4631 UF2 Bootloader
• Notes:
  • Cortex-M4 LL Details

• git 2.51 or later
• github repo
• Nim 2.2.0 or later
• ARM GNU Toolchain Version 14.3.Rel1
  • pick a file from the section "ARM AArch32 bare-metal target (arm-none-eabi)"
  • provides a GCC 14.3 cross-compiler
  • nim has better interop with gcc than clang
• Coding style guidance (in order)(aberration tolerated when consistent or appealing):
  1. nph; let the tool do the formatting
  2. nep1
  3. Status style guide

• libc