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65 lines
2.2 KiB
Python
65 lines
2.2 KiB
Python
"""
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PlatformIO post-build script: merge bootloader + partitions + firmware
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into a single flashable binary.
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Output: .pio/build/<env>/firmware_merged.bin
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Flash: esptool.py --chip esp32s3 write_flash 0x0 firmware_merged.bin
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Place this file in the project root alongside platformio.ini.
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Add to each environment (or the base section):
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extra_scripts = post:merge_firmware.py
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"""
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Import("env")
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def merge_bin(source, target, env):
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import subprocess, os
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build_dir = env.subst("$BUILD_DIR")
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env_name = env.subst("$PIOENV")
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bootloader = os.path.join(build_dir, "bootloader.bin")
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partitions = os.path.join(build_dir, "partitions.bin")
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firmware = os.path.join(build_dir, "firmware.bin")
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output = os.path.join(build_dir, "firmware-merged.bin")
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# Verify all inputs exist
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for f in [bootloader, partitions, firmware]:
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if not os.path.isfile(f):
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print(f"[merge] WARNING: {f} not found, skipping merge")
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return
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# Read flash settings from board config
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flash_mode = env.BoardConfig().get("build.flash_mode", "qio")
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flash_freq = env.BoardConfig().get("build.f_flash", "80000000L").rstrip("L")
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flash_size = env.BoardConfig().get("upload.flash_size", "16MB")
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mcu = env.BoardConfig().get("build.mcu", "esp32s3")
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# Convert numeric frequency to esptool format
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freq_map = {"80000000": "80m", "40000000": "40m", "26000000": "26m", "20000000": "20m"}
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flash_freq_str = freq_map.get(flash_freq, "80m")
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cmd = [
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env.subst("$PYTHONEXE"), "-m", "esptool",
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"--chip", mcu,
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"merge_bin",
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"-o", output,
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"--flash_mode", flash_mode,
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"--flash_freq", flash_freq_str,
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"--flash_size", flash_size,
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"0x0", bootloader,
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"0x8000", partitions,
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"0x10000", firmware,
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]
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print(f"\n[merge] Creating merged firmware for {env_name}...")
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print(f"[merge] {' '.join(cmd[-6:])}")
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result = subprocess.run(cmd, capture_output=True, text=True)
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if result.returncode == 0:
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size_kb = os.path.getsize(output) / 1024
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print(f"[merge] OK: {output} ({size_kb:.0f} KB)")
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else:
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print(f"[merge] FAILED: {result.stderr}")
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env.AddPostAction("$BUILD_DIR/firmware.bin", merge_bin) |