Mercurial > avr_jtag
view py_avrjtag/cp_tditdo.py @ 6:42dec3428c77
Define TMS transition patterns
author | Thinker K.F. Li <thinker@branda.to> |
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date | Sun, 22 Feb 2009 14:12:29 +0800 |
parents | 6b1594fb668f |
children |
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import cmd_proto def cp_tms(seq, nbits, data): nbits_bytes = chr(nbits & 0xff) + chr(nbits >> 8) cmd = cmd_proto.cmd(seq, cmd_proto.CPCMD_SHIFT_TDI_TDO, nbits_bytes + data) frame = cmd.to_frame() return frame def get_reply(fo): import fcntl, os import time reply = '' fcntl.fcntl(fo.fileno(), fcntl.F_SETFL, os.O_NONBLOCK) while True: try: s = os.read(fo.fileno(), 256) except OSError: time.sleep(0.13) try: s = os.read(fo.fileno(), 256) except OSError: break pass reply = reply + s pass return reply if __name__ == '__main__': import sys if len(sys.argv) != 2: print >> sys.stderr, 'Usage: prog <port device>' sys.exit(1) pass port = sys.argv[1] fo = open(port, 'r+b') cmd_str = cp_tms(12, 37, 'hello') fo.write(cmd_str) fo.flush() frame = get_reply(fo) cmd = cmd_proto.cmd() r = cmd.from_frame(frame) if r: print 'frame error %s' % (repr(frame)) else: print repr(cmd) pass pass