bf68b9e597
* Add LTO support for nrf52840 while preserving interrupt handlers * nrf52840: enable whole-image LTO on all targets via nrf52_base Moves -flto + the nrf52_lto.py exclusion middleware from the rak4631 env (771018ca8) up to [nrf52_base], so every nrf52840 target inherits it. nrf52_lto.py keeps the interrupt handlers out of LTO (framework core + TinyUSB USBD_IRQHandler) -- they're referenced only from the asm vector table, so whole-program LTO would otherwise drop them and the chip hangs. HW-validated: RAK4631 (SX1262, -60KB) and muzi-base (LR1121) both boot and init their radios. Build-verified on canaryone (fresh board, base-inherited). Caveat: the RAK "1-Watt" variant's radio does not tolerate global-LTO (SX126x init fails); it shares the rak4631 binary, so keep that hardware on src-only or split it into a separate target. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> * nrf52840: move -fmerge-all-constants to nrf52_base (all targets) It had been trialed on rak4631 only; it's a general image-wide flag (the same one stm32 uses globally, ~0.7KB), so move it up to [nrf52_base] next to -flto so every nrf52840 target gets it instead of just rak4631. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> * nrf52_lto.py: normalize path separators for Windows (Copilot review) get_abspath() returns backslash-separated paths on Windows, so the "/FrameworkArduino/" / "/cores/nRF5/" substring matches would miss and the ISR-owning objects would still be LTO'd -> hang on first IRQ. Replace backslashes with forward slashes before matching. No-op on macOS/Linux. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> * Fix directory handling for LTO * Add post-link guard to check for dropped ISR handlers in nrf52 LTO --------- Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Co-authored-by: Jason P <applewiz@mac.com>
Meshtastic Firmware
Overview
This repository contains the official device firmware for Meshtastic, an open-source LoRa mesh networking project designed for long-range, low-power communication without relying on internet or cellular infrastructure. The firmware supports various hardware platforms, including ESP32, nRF52, RP2040/RP2350, and Linux-based devices.
Meshtastic enables text messaging, location sharing, and telemetry over a decentralized mesh network, making it ideal for outdoor adventures, emergency preparedness, and remote operations.
Get Started
- 🔧 Building Instructions – Learn how to compile the firmware from source.
- ⚡ Flashing Instructions – Install or update the firmware on your device.
Join our community and help improve Meshtastic! 🚀
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