mirror of
https://github.com/1technophile/OpenMQTTGateway.git
synced 2026-02-20 00:32:04 +01:00
149712b573
* add script to compress firmware before ota upload * add examples for OTA flashing/updating Sonoff RF Bridge - use compress script to save space uploading firmware - use "board_build.ldscript = eagle.flash.1m64.ld" to free some additional space for OTA flashing.
33 lines
1.4 KiB
Python
33 lines
1.4 KiB
Python
import gzip
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import shutil
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import os
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Import("env")
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def compressFirmware(source, target, env):
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""" Compress firmware using gzip for 'compressed OTA upload' """
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SOURCE_FILE = env.subst("$BUILD_DIR") + os.sep + env.subst("$PROGNAME") + ".bin"
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SOURCE_BAK = SOURCE_FILE + '.bak'
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do_compress = True
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if os.path.exists(SOURCE_FILE) and os.path.exists(SOURCE_BAK):
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src_mtime = os.stat(SOURCE_FILE).st_mtime
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bak_mtime = os.stat(SOURCE_BAK).st_mtime
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""" Recompress if .bin file is newer than .bak file """
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do_compress = (src_mtime > bak_mtime)
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if do_compress:
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print("Compressing firmware for upload...")
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shutil.move(SOURCE_FILE, SOURCE_BAK)
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with open(SOURCE_BAK, 'rb') as f_in:
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with gzip.open(SOURCE_FILE, 'wb', compresslevel = 9) as f_out:
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shutil.copyfileobj(f_in, f_out)
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""" Set modification time on compressed file so incremental build works """
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shutil.copystat(SOURCE_BAK, SOURCE_FILE)
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if os.path.exists(SOURCE_BAK):
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ORG_FIRMWARE_SIZE = os.stat(SOURCE_BAK).st_size
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GZ_FIRMWARE_SIZE = os.stat(SOURCE_FILE).st_size
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print("Compression reduced firmware size to {:.0f}% (was {} bytes, now {} bytes)".format((GZ_FIRMWARE_SIZE / ORG_FIRMWARE_SIZE) * 100, ORG_FIRMWARE_SIZE, GZ_FIRMWARE_SIZE))
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env.AddPostAction("$BUILD_DIR/firmware.bin", [compressFirmware]) |