Mercurial > avr_jtag
comparison py_avrjtag/cp_ping.py @ 4:6b1594fb668f
Improve performance of jtag.c and test it with Python scripts.
- cp_tditdo.py send bits to TDI and hope it will feed back from TDO.
- Expand loops in jtag.c to improve performance.
| author | Thinker K.F. Li <thinker@branda.to> |
|---|---|
| date | Sun, 22 Feb 2009 12:54:45 +0800 |
| parents | tests/cp_ping.py@e410832c3280 |
| children | cc106f278d7d |
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| 3:e410832c3280 | 4:6b1594fb668f |
|---|---|
| 1 import cmd_proto | |
| 2 | |
| 3 def cp_ping(seq, data): | |
| 4 cmd = cmd_proto.cmd(seq, cmd_proto.CPCMD_PING, data) | |
| 5 frame = cmd.to_frame() | |
| 6 return frame | |
| 7 | |
| 8 def get_reply(fo): | |
| 9 import fcntl, os | |
| 10 import time | |
| 11 | |
| 12 reply = '' | |
| 13 fcntl.fcntl(fo.fileno(), fcntl.F_SETFL, os.O_NONBLOCK) | |
| 14 while True: | |
| 15 try: | |
| 16 s = os.read(fo.fileno(), 256) | |
| 17 except OSError: | |
| 18 time.sleep(0.5) | |
| 19 try: | |
| 20 s = os.read(fo.fileno(), 256) | |
| 21 except OSError: | |
| 22 break | |
| 23 pass | |
| 24 reply = reply + s | |
| 25 pass | |
| 26 return reply | |
| 27 | |
| 28 if __name__ == '__main__': | |
| 29 import sys | |
| 30 | |
| 31 if len(sys.argv) != 2: | |
| 32 print >> sys.stderr, 'Usage: prog <port device>' | |
| 33 sys.exit(1) | |
| 34 pass | |
| 35 | |
| 36 port = sys.argv[1] | |
| 37 | |
| 38 fo = open(port, 'r+b') | |
| 39 cmd_str = cp_ping(0, 'hello') | |
| 40 fo.write(cmd_str) | |
| 41 fo.flush() | |
| 42 | |
| 43 frame = get_reply(fo) | |
| 44 cmd = cmd_proto.cmd() | |
| 45 cmd.from_frame(frame) | |
| 46 print repr(cmd) | |
| 47 |