66 lines
2.0 KiB
Python
Executable File
66 lines
2.0 KiB
Python
Executable File
#!/usr/bin/python
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# Push specified file (max 0xff bytes) to specified device and verify that
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# the contents is correct by sending a "peek" command afterwards and check
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# the output. Errors out if the contents isn't the same. The parameter
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# passed to the "peek" command is the length of the uploaded file.
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import argparse
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import os
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import sys
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import time
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def sendcmd(fd, cmd):
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# The serial link echoes back all typed characters and expects us to read
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# them. We have to send each char one at a time.
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print("Executing {}".format(cmd.decode()))
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for c in cmd:
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os.write(fd, bytes([c]))
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os.read(fd, 1)
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os.write(fd, b'\n')
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os.read(fd, 2) # sends back \r\n
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument('device')
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parser.add_argument('filename')
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args = parser.parse_args()
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st = os.stat(args.filename)
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if st.st_size > 0xff:
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print("File too big. 0xff bytes max")
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return 1
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fd = os.open(args.device, os.O_RDWR)
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sendcmd(fd, 'load {:x}'.format(st.st_size).encode())
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print("Loading...")
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with open(args.filename, 'rb') as fp:
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fcontents = fp.read()
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for c in fcontents:
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os.write(fd, bytes([c]))
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# Let's give the machine a bit of time to breathe. We ain't in a
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# hurry now, are we?
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time.sleep(0.0001)
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print("Loaded")
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os.read(fd, 5)
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print("Peeking back...")
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sendcmd(fd, 'peek {:x}'.format(st.st_size).encode())
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peek = b''
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while len(peek) < st.st_size * 2:
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peek += os.read(fd, 1)
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time.sleep(0.0001)
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os.close(fd)
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print("Got {}".format(peek.decode()))
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print("Comparing...")
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for i, c in enumerate(fcontents):
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hexfmt = '{:02X}'.format(c).encode()
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if hexfmt != peek[:2]:
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print("Mismatch at byte {}! {} != {}".format(i, peek[:2], hexfmt))
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return 1
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peek = peek[2:]
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print("All good!")
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return 0
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if __name__ == '__main__':
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sys.exit(main())
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