|
- #!/usr/bin/python
-
- # Read specified number of bytes at specified memory address and dump it to
- # stdout.
-
- import argparse
- import os
- import sys
- import time
-
- def sendcmd(fd, cmd):
- # The serial link echoes back all typed characters and expects us to read
- # them. We have to send each char one at a time.
- for c in cmd:
- os.write(fd, bytes([c]))
- os.read(fd, 1)
- os.write(fd, b'\n')
- os.read(fd, 2) # sends back \r\n
-
-
- def main():
- parser = argparse.ArgumentParser()
- parser.add_argument('device')
- parser.add_argument('memptr')
- parser.add_argument('bytecount')
- args = parser.parse_args()
-
- try:
- memptr = int('0x' + args.memptr, 0)
- except ValueError:
- print("memptr are has to be hexadecimal without prefix.")
- return 1
- try:
- bytecount = int('0x' + args.bytecount, 0)
- except ValueError:
- print("bytecount are has to be hexadecimal without prefix.")
- return 1
- if memptr >= 0x10000:
- print("memptr out of range.")
- return 1
- if bytecount + memptr >= 0x10000:
- print("Bytecount too big.")
- return 1
- fd = os.open(args.device, os.O_RDWR)
- while bytecount > 0:
- sendcmd(fd, 'mptr {:04x}'.format(memptr).encode())
- os.read(fd, 9)
- toread = min(bytecount, 0xff)
- sendcmd(fd, 'peek {:x}'.format(toread).encode())
- peek = b''
- while len(peek) < toread * 2:
- peek += os.read(fd, 1)
- time.sleep(0.0001)
- os.read(fd, 5)
- while peek:
- c = peek[:2]
- sys.stdout.buffer.write(bytes([int(c, 16)]))
- peek = peek[2:]
- memptr += toread
- bytecount -= toread
- os.close(fd)
- return 0
-
- if __name__ == '__main__':
- sys.exit(main())
|