mirror of
https://git.mirrors.martin98.com/https://github.com/Ultimaker/Cura
synced 2025-05-03 17:24:21 +08:00
63e8cf72a3
git-subtree-dir: plugins/USBPrinting git-subtree-mainline: 3823afd8cca1fe92b69082d51d0d50946b904e91 git-subtree-split: b28ca0881a6c2564f5447476f7b21de5645c10bd
47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
"""
|
|
Module to read intel hex files into binary data blobs.
|
|
IntelHex files are commonly used to distribute firmware
|
|
See: http://en.wikipedia.org/wiki/Intel_HEX
|
|
This is a python 3 conversion of the code created by David Braam for the Cura project.
|
|
"""
|
|
import io
|
|
|
|
def readHex(filename):
|
|
"""
|
|
Read an verify an intel hex file. Return the data as an list of bytes.
|
|
"""
|
|
data = []
|
|
extraAddr = 0
|
|
f = io.open(filename, "r")
|
|
for line in f:
|
|
line = line.strip()
|
|
if len(line) < 1:
|
|
continue
|
|
if line[0] != ':':
|
|
raise Exception("Hex file has a line not starting with ':'")
|
|
recLen = int(line[1:3], 16)
|
|
addr = int(line[3:7], 16) + extraAddr
|
|
recType = int(line[7:9], 16)
|
|
if len(line) != recLen * 2 + 11:
|
|
raise Exception("Error in hex file: " + line)
|
|
checkSum = 0
|
|
for i in range(0, recLen + 5):
|
|
checkSum += int(line[i*2+1:i*2+3], 16)
|
|
checkSum &= 0xFF
|
|
if checkSum != 0:
|
|
raise Exception("Checksum error in hex file: " + line)
|
|
|
|
if recType == 0:#Data record
|
|
while len(data) < addr + recLen:
|
|
data.append(0)
|
|
for i in range(0, recLen):
|
|
data[addr + i] = int(line[i*2+9:i*2+11], 16)
|
|
elif recType == 1: #End Of File record
|
|
pass
|
|
elif recType == 2: #Extended Segment Address Record
|
|
extraAddr = int(line[9:13], 16) * 16
|
|
else:
|
|
print(recType, recLen, addr, checkSum, line)
|
|
f.close()
|
|
return data
|