avr_jtag: py_avrjtag/cmd_proto.py annotate

annotate py_avrjtag/cmd_proto.py @ 13:1ea479d26fce tip

Make sure shifting phase and add bypass.py. - shifting phase is started after entering SHIFT state Transition from CAP to SHIFT does not induce shifting. - shifting phase is stoped after leaving SHIFT state. Transition from SHIFT to EXIT1 also induce a bit of shifting.

author	Thinker K.F. Li <thinker@branda.to>
date	Wed, 25 Feb 2009 20:08:29 +0800
parents	cc106f278d7d
children

rev	line source
4 6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	1 import struct
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	2
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	3 CPCMD_PING = 1
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	4 CPCMD_SHIFT_TDI = 2
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	5 CPCMD_SHIFT_TMS = 3
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	6 CPCMD_SHIFT_TDI_TDO = 4
7 61f27549de57 Support TRST. Thinker K.F. Li <thinker@branda.to> parents: 4 diff changeset	7 CPCMD_TRST = 5
61f27549de57 Support TRST. Thinker K.F. Li <thinker@branda.to> parents: 4 diff changeset	8 CPCMD_PONG = 6
61f27549de57 Support TRST. Thinker K.F. Li <thinker@branda.to> parents: 4 diff changeset	9 CPCMD_DATA = 7
61f27549de57 Support TRST. Thinker K.F. Li <thinker@branda.to> parents: 4 diff changeset	10 CPCMD_ACK = 8
61f27549de57 Support TRST. Thinker K.F. Li <thinker@branda.to> parents: 4 diff changeset	11 CPCMD_NAK = 9
4 6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	12
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	13 def csum_add(csum, c):
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	14 return (((csum << 3) \| (csum >> 5)) ^ c) & 0xff
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	15
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	16 class cmd(object):
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	17 OFF_SEQ = 2
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	18 OFF_DSZ = 3
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	19 OFF_CODE = 4
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	20 FRAME_OVERHEAD = 5
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	21
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	22 def __init__(self, seq=0, code=0, data=''):
10 cc106f278d7d Get identify of components Thinker K.F. Li <thinker@branda.to> parents: 8 diff changeset	23 if len(data) >= 255:
cc106f278d7d Get identify of components Thinker K.F. Li <thinker@branda.to> parents: 8 diff changeset	24 raise ValueError, 'data length (%d) >= 255' % (len(data))
4 6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	25 self.seq = seq
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	26 self.code = code
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	27 self.data = data
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	28 pass
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	29
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	30 def to_frame(self):
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	31 csum = 0
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	32 csum = csum_add(0, self.code)
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	33 for c in self.data:
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	34 csum = csum_add(csum, ord(c))
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	35 pass
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	36 csum = csum_add(csum, 0)
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	37
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	38 frame = struct.pack('BBBBB', ord('J'), ord('C'), self.seq,
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	39 len(self.data) + 1, self.code)
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	40 frame = frame + self.data + chr(csum)
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	41 return frame
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	42
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	43 def from_frame(self, frame):
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	44 if frame[:2] != 'JC':
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	45 return -1
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	46
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	47 csum = 0
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	48 for c in frame[self.OFF_CODE:]:
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	49 csum = csum_add(csum, ord(c))
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	50 pass
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	51 if csum:
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	52 return -1
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	53
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	54 data_sz = ord(frame[self.OFF_DSZ])
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	55 if data_sz != (len(frame) - self.FRAME_OVERHEAD):
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	56 return -1
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	57
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	58 if not data_sz:
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	59 return -1
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	60
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	61 self.seq = ord(frame[self.OFF_SEQ])
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	62 self.code = ord(frame[self.OFF_CODE])
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	63 self.data = frame[self.OFF_CODE + 1:-1]
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	64 pass
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	65
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	66 def __repr__(self):
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	67 return '<%s {seq: %d, code: %d, data: %s}>' % \
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	68 (self.__class__.__name__, self.seq, self.code, repr(self.data))
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	69 pass
6b1594fb668f Improve performance of jtag.c and test it with Python scripts. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	70
8 074e860d7d31 jtagdev is a desktop client to communicate with jtag device through Arduino. Thinker K.F. Li <thinker@branda.to> parents: 7 diff changeset	71 def prepend_nbits(nbits, data):
074e860d7d31 jtagdev is a desktop client to communicate with jtag device through Arduino. Thinker K.F. Li <thinker@branda.to> parents: 7 diff changeset	72 r = chr(nbits & 0xff) + chr(nbits >> 8) + data
074e860d7d31 jtagdev is a desktop client to communicate with jtag device through Arduino. Thinker K.F. Li <thinker@branda.to> parents: 7 diff changeset	73 return r

Mercurial > avr_jtag

annotate py_avrjtag/cmd_proto.py @ 13:1ea479d26fce tip