78 lines
1.8 KiB
Python
78 lines
1.8 KiB
Python
import argparse
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import serial
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import struct
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import sys
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import threading
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import time
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offset = 0x80000000
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tty = '/dev/ttyUSB1'
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baud = 115200
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chunksize = 1024
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def write(s, offset, dat):
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for i in range(0, len(dat), chunksize):
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chunk = dat[i: i + chunksize]
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cmd = struct.pack('<cII', b'c', offset + i, len(chunk))
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print(f'Sending {len(chunk)} bytes @0x{offset + i:04x}')
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s.write(cmd)
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s.write(chunk)
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ack = s.read(2)
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if len(ack) < 2:
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raise RuntimeError(f'timeout waiting for full ack. got {ack}')
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if ack[0] != b'a'[0]:
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raise RuntimeError(f'expected ack, got this instead: {ack}')
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print(f'Ack! len={ack[1]}')
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def jump(s, offset):
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cmd = struct.pack('<cI', b'j', offset)
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print(f'Jumping to 0x{offset:04x}')
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s.write(cmd)
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def stream_logs(s):
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while True:
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dat = s.read()
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if not dat:
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continue
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sys.stdout.buffer.write(dat.replace(b'\r', b''))
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sys.stdout.buffer.flush()
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def parse_args():
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parser = argparse.ArgumentParser()
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parser.add_argument("binary")
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parser.add_argument("--monitor", action="store_true",
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help="wait for and display program serial output")
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return parser.parse_args()
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def main():
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args = parse_args()
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with open(args.binary, 'rb') as f:
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dat = f.read()
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s = serial.Serial(tty, baud, timeout=1)
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write(s, offset, dat)
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jump(s, offset)
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if args.monitor:
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t = threading.Thread(target=lambda: stream_logs(s), daemon=True)
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t.start()
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try:
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while True:
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dat = input("") + '\r'
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s.write(dat.encode())
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except KeyboardInterrupt:
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print("Bye.")
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if __name__ == "__main__":
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main()
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