kopia lustrzana https://github.com/meshtastic/firmware
114 wiersze
3.2 KiB
Python
114 wiersze
3.2 KiB
Python
import struct
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Import("env") # noqa: F821
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# Parse input and create UF2 file
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def create_uf2(source, target, env):
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# source_hex = target[0].get_abspath()
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source_hex = target[0].get_string(False)
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source_hex = ".\\" + source_hex
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print("#########################################################")
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print("Create UF2 from " + source_hex)
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print("#########################################################")
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# print("Source: " + source_hex)
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target = source_hex.replace(".hex", "")
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target = target + ".uf2"
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# print("Target: " + target)
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with open(source_hex, mode="rb") as f:
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inpbuf = f.read()
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outbuf = convert_from_hex_to_uf2(inpbuf.decode("utf-8"))
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write_file(target, outbuf)
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print("#########################################################")
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print(target + " is ready to flash to target device")
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print("#########################################################")
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# Add callback after .hex file was created
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env.AddPostAction("$BUILD_DIR/${PROGNAME}.hex", create_uf2) # noqa: F821
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# UF2 creation taken from uf2conv.py
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UF2_MAGIC_START0 = 0x0A324655 # "UF2\n"
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UF2_MAGIC_START1 = 0x9E5D5157 # Randomly selected
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UF2_MAGIC_END = 0x0AB16F30 # Ditto
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familyid = 0xADA52840
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class Block:
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def __init__(self, addr):
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self.addr = addr
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self.bytes = bytearray(256)
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def encode(self, blockno, numblocks):
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global familyid
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flags = 0x0
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if familyid:
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flags |= 0x2000
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hd = struct.pack(
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"<IIIIIIII",
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UF2_MAGIC_START0,
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UF2_MAGIC_START1,
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flags,
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self.addr,
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256,
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blockno,
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numblocks,
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familyid,
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)
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hd += self.bytes[0:256]
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while len(hd) < 512 - 4:
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hd += b"\x00"
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hd += struct.pack("<I", UF2_MAGIC_END)
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return hd
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def write_file(name, buf):
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with open(name, "wb") as f:
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f.write(buf)
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# print("Wrote %d bytes to %s." % (len(buf), name))
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def convert_from_hex_to_uf2(buf):
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global appstartaddr
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appstartaddr = None
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upper = 0
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currblock = None
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blocks = []
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for line in buf.split("\n"):
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if line[0] != ":":
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continue
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i = 1
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rec = []
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while i < len(line) - 1:
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rec.append(int(line[i : i + 2], 16))
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i += 2
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tp = rec[3]
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if tp == 4:
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upper = ((rec[4] << 8) | rec[5]) << 16
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elif tp == 2:
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upper = ((rec[4] << 8) | rec[5]) << 4
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assert (upper & 0xFFFF) == 0
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elif tp == 1:
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break
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elif tp == 0:
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addr = upper | (rec[1] << 8) | rec[2]
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if appstartaddr is None:
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appstartaddr = addr
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i = 4
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while i < len(rec) - 1:
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if not currblock or currblock.addr & ~0xFF != addr & ~0xFF:
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currblock = Block(addr & ~0xFF)
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blocks.append(currblock)
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currblock.bytes[addr & 0xFF] = rec[i]
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addr += 1
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i += 1
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numblocks = len(blocks)
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resfile = b""
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for i in range(0, numblocks):
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resfile += blocks[i].encode(i, numblocks)
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return resfile
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