tooling: Add make deploy-usb for DAPLink mass-storage flashing.

Author: nedseb

CONTRIBUTING.md

@@ -195,6 +195,7 @@ make firmware       # Clone micropython-steami (if needed), link local drivers,
 make firmware-update # Refresh the MicroPython clone and board-specific submodules
 make deploy         # Flash firmware via pyOCD (default)
 make deploy-openocd # Flash firmware via OpenOCD (alternative)
+make deploy-usb     # Flash firmware via DAPLink USB mass-storage (alternative)
 make run SCRIPT=lib/steami_config/examples/show_config.py      # Run with live output
 make deploy-script SCRIPT=lib/.../calibrate_magnetometer.py    # Deploy as main.py for autonomous use
 make run-main       # Re-execute the deployed main.py

Makefile

@@ -134,6 +134,23 @@ deploy-pyocd: $(MPY_DIR) ## Flash firmware via pyOCD (CMSIS-DAP)
 deploy-openocd: $(MPY_DIR) ## Flash firmware via OpenOCD
 	$(MAKE) -C $(STM32_DIR) BOARD=$(BOARD) deploy-openocd
 
+.PHONY: deploy-usb
+deploy-usb: $(MPY_DIR) ## Flash firmware via DAPLink USB mass-storage
+	@set -e; \
+	case $$(uname) in \
+		Linux)  MOUNT=$$(findmnt -n -o TARGET -S LABEL=STeaMi | head -1) ;; \
+		Darwin) MOUNT=/Volumes/STeaMi ;; \
+		*)      echo "Error: unsupported OS $$(uname)"; exit 1 ;; \
+	esac; \
+	if [ -z "$$MOUNT" ] || [ ! -d "$$MOUNT" ]; then \
+		echo "Error: STeaMi board not found. Is it connected and mounted?"; \
+		exit 1; \
+	fi; \
+	echo "Copying firmware to $$MOUNT..."; \
+	cp $(STM32_DIR)/build-$(BOARD)/firmware.bin "$$MOUNT/"; \
+	sync; \
+	echo "Firmware deployed via USB. Board will reset automatically."
+
 .PHONY: run
 run: ## Run a script on the board with live output (SCRIPT=path/to/file.py)
 	@if [ -z "$(SCRIPT)" ]; then \