README.md

Printhor: The highly reliable but not necessarily functional 3D printer firmware

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Overview

This two boards are quite functional:

• https://biqu.equipment/collections/control-board/products/bigtreetech-skr-mini-e3-v2-0-32-bit-control-board-for-ender-3
• https://biqu.equipment/products/bigtreetech-skr-mini-e3-v2-0-32-bit-control-board-integrated-tmc2209-uart-for-ender-4

Binary image production (standard with defmt)

The firmware.bin file ready to be uploaded to the SD can be produced with the following commandline:

For SKR Minit E3 V2.0:

DEFMT_LOG=info cargo objcopy --release --no-default-features --features skr_mini_e3_v2 --target thumbv7m-none-eabi --bin printhor -- -O binary firmware.bin

For SKR Minit E3 V3.0:

DEFMT_LOG=info cargo objcopy --release --no-default-features --features skr_mini_e3_v3 --target thumbv6m-none-eabi --bin printhor -- -O binary firmware.bin

or

DEFMT_LOG=info cargo objcopy --release --no-default-features --features skr_mini_e3_v3 --target thumbv6m-none-eabi --bin printhor -- -O binary firmware.bin

Firmware size around 196kB as of now with previous settings.

Minimal-size binary image production

DEFMT_LOG=off RUST_BACKTRACE=0 cargo objcopy --profile release-opt --no-default-features --features skr_mini_e3_v3 --target thumbv6m-none-eabi --bin printhor -- -O binary firmware.bin

Firmware size if 180kB as of now with previous settings.

Run with JLink/SWD device

DEFMT_LOG=info RUST_BACKTRACE=1 RUSTFLAGS='--cfg board="skr_mini_e3_v3"' cargo run --release --no-default-features --features skr_mini_e3_v3 --target thumbv6m-none-eabi --bin printhor