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.gitlab-ci.yml

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+stages:
+  - build
+
+variables:
+  F_CPU: "8000000UL"
+
+before_script:
+  # nur nötig bei Shell Runner → Tools müssen installiert sein
+  - avr-gcc --version
+
+build_dev:
+  stage: build
+  tags:
+    - avr
+  script:
+    - VERSION=$(cat VERSION.txt)
+    - echo "Building version $VERSION"
+    - make MCU=atmega644pa BUILD_TYPE=dev VERSION=$VERSION
+  artifacts:
+    paths:
+      - build/dev/*.hex
+  rules:
+  - if: '$CI_COMMIT_BRANCH == "dev"'
+
+build_prod:
+  stage: build
+  tags:
+    - avr
+  script:
+    - VERSION=$(cat VERSION.txt)
+    - echo "Building DEV-Version $VERSION"
+    - make MCU=atmega644pa BUILD_TYPE=prod VERSION=$VERSION
+  artifacts:
+    paths:
+      - build/prod/*.hex
+  rules:
+    - if: '$CI_COMMIT_BRANCH == "main"'
+

VERSION.txt

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+0.1

makefile

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+MCU ?= atmega644pa
+BUILD_TYPE ?= dev
+VERSION ?= 0.1
+
+F_CPU ?= 8000000UL
+
+CC = avr-gcc
+OBJCOPY = avr-objcopy
+
+SRC = src/main.c
+
+OUTDIR = build/$(BUILD_TYPE)
+
+ifeq ($(BUILD_TYPE),dev)
+    PREFIX = DEV_ENO
+else
+    PREFIX = ENO
+endif
+
+TARGET = $(OUTDIR)/$(PREFIX)_$(VERSION)
+
+CFLAGS = -mmcu=$(MCU) -DF_CPU=$(F_CPU) -Os -DVERSION=\"$(VERSION)\"
+
+all: $(TARGET).hex
+
+$(TARGET).elf:
+	@mkdir -p $(OUTDIR)
+	$(CC) $(CFLAGS) $(SRC) -o $@
+
+$(TARGET).hex: $(TARGET).elf
+	$(OBJCOPY) -O ihex -R .eeprom $< $@
+
+clean:
+	rm -rf build