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import os
import subprocess
import shutil
from SCons.Script import DefaultEnvironment
Import("env")
def build_littlefs():
if os.path.isfile('data/settings.json') == False:
return # nothing to do
result = subprocess.run(["pio", "run", "--target", "buildfs", "--environment", env['PIOENV']])
if result.returncode != 0:
print("Error building LittleFS:")
exit(1)
else:
print("LittleFS build successful")
def merge_bins():
if os.path.isfile('data/settings.json') == False:
return # nothing to do
BOOTLOADER_OFFSET = 0x0000
PARTITIONS_OFFSET = 0x8000
FIRMWARE_OFFSET = 0x10000
if env['PIOENV'][:13] == "esp32-wroom32":
BOOTLOADER_OFFSET = 0x1000
flash_size = int(env.BoardConfig().get("upload.maximum_size", "1310720")) # 0x140000
app0_offset = 0x10000
if env['PIOENV'][:7] == "esp8266":
app0_offset = 0
elif env['PIOENV'][:7] == "esp8285":
app0_offset = 0
littlefs_offset = 0x290000
if flash_size == 0x330000:
littlefs_offset = 0x670000
elif flash_size == 0x640000:
littlefs_offset = 0xc90000
# save current wd
start = os.getcwd()
os.chdir('.pio/build/' + env['PIOENV'] + '/')
with open("bootloader.bin", "rb") as bootloader_file:
bootloader_data = bootloader_file.read()
with open("partitions.bin", "rb") as partitions_file:
partitions_data = partitions_file.read()
with open("firmware.bin", "rb") as firmware_file:
firmware_data = firmware_file.read()
with open("littlefs.bin", "rb") as littlefs_file:
littlefs_data = littlefs_file.read()
with open("firmware.factory.bin", "wb") as merged_file:
merged_file.write(b'\xFF' * BOOTLOADER_OFFSET)
merged_file.write(bootloader_data)
merged_file.write(b'\xFF' * (PARTITIONS_OFFSET - (BOOTLOADER_OFFSET + len(bootloader_data))))
merged_file.write(partitions_data)
merged_file.write(b'\xFF' * (FIRMWARE_OFFSET - (PARTITIONS_OFFSET + len(partitions_data))))
merged_file.write(firmware_data)
merged_file.write(b'\xFF' * (littlefs_offset - (FIRMWARE_OFFSET + len(firmware_data))))
merged_file.write(littlefs_data)
os.chdir(start)
def main(target, source, env):
build_littlefs()
merge_bins()
# ensure that script is called once firmeware was compiled
env.AddPostAction("$BUILD_DIR/${PROGNAME}.bin", main)