Mercurial > avr_jtag

comparison py_avrjtag/jtagdev.py @ 13:1ea479d26fce tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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 68ecd42850d3
children
comparison
equal deleted inserted replaced
12:68ecd42850d3 13:1ea479d26fce
1 import tms_ptns 1 import tms_ptns
2 import cmd_proto 2 import cmd_proto
3 3
4 debug_frame = 0 4 debug_frame = 0
5
6 def dump_frame(frame):
7 r = ''
8 for c in frame:
9 r = r + ('%02x ' % (ord(c)))
10 pass
11 print r
12 pass
5 13
6 class jtagdev(object): 14 class jtagdev(object):
7 ST_RESET = 0 15 ST_RESET = 0
8 ST_IDLE = 1 16 ST_IDLE = 1
9 ST_SHIFT_DR = 2 17 ST_SHIFT_DR = 2
11 ST_EXIT1_DR = 4 19 ST_EXIT1_DR = 4
12 ST_EXIT1_IR = 5 20 ST_EXIT1_IR = 5
13 21
14 def __init__(self, fo): 22 def __init__(self, fo):
15 self.fo = fo 23 self.fo = fo
16 self.state = self.ST_IDLE 24 self.state = self.ST_RESET
17 self.seq = 0 25 self.seq = 0
18 pass 26 pass
19 27
20 def _send_cmd(self, code, data): 28 def _send_cmd(self, code, data):
21 cmd = cmd_proto.cmd(self.seq, code, data) 29 cmd = cmd_proto.cmd(self.seq, code, data)
56 pass 64 pass
57 65
58 if not frame: 66 if not frame:
59 return None 67 return None
60 if debug_frame: 68 if debug_frame:
61 print repr(frame) 69 dump_frame(frame)
62 pass 70 pass
63 71
64 cmd = cmd_proto.cmd() 72 cmd = cmd_proto.cmd()
65 r = cmd.from_frame(frame) 73 r = cmd.from_frame(frame)
66 if r: 74 if r:
83 def go_shift_IR(self): 91 def go_shift_IR(self):
84 if self.state == self.ST_SHIFT_IR: 92 if self.state == self.ST_SHIFT_IR:
85 return 93 return
86 94
87 if self.state == self.ST_IDLE: 95 if self.state == self.ST_IDLE:
88 ptn, ptn_nbits = tms_ptns.TMS_CAP_IR 96 ptn, ptn_nbits = tms_ptns.TMS_SHIFT_IR
89 self._send_tms(ptn, ptn_nbits) 97 elif self.state == self.ST_EXIT1_DR:
90 elif self.state == self.ST_SHIFT__DR: 98 ptn, ptn_nbits = tms_ptns.TMS_EXIT1_DR_2_SHIFT_IR
91 ptn, ptn_nbits = tms_ptns.TMS_SHIFT_DR_2_CAP_IR 99 elif self.state == self.ST_EXIT1_IR:
92 self._send_tms(ptn, ptn_nbits) 100 ptn, ptn_nbits = tms_ptns.TMS_EXIT1_IR_2_SHIFT_IR
93 else: 101 else:
94 raise RuntimeError, 'Transite to shift IR state from invalid state' 102 raise RuntimeError, 'Transite to shift IR state from invalid state'
103 self._send_tms(ptn, ptn_nbits)
95 self.state = self.ST_SHIFT_IR 104 self.state = self.ST_SHIFT_IR
96 pass 105 pass
97 106
98 def go_shift_DR(self): 107 def go_shift_DR(self):
99 if self.state == self.ST_SHIFT_DR: 108 if self.state == self.ST_SHIFT_DR:
100 return 109 return
101 110
102 if self.state == self.ST_IDLE: 111 if self.state == self.ST_IDLE:
103 ptn, ptn_nbits = tms_ptns.TMS_CAP_DR 112 ptn, ptn_nbits = tms_ptns.TMS_SHIFT_DR
104 self._send_tms(ptn, ptn_nbits) 113 elif self.state == self.ST_EXIT1_IR:
105 elif self.state == self.ST_SHIFT_IR: 114 ptn, ptn_nbits = tms_ptns.TMS_EXIT1_IR_2_SHIFT_DR
106 ptn, ptn_nbits = tms_ptns.TMS_SHIFT_IR_2_CAP_DR 115 elif self.state == self.ST_EXIT1_DR:
107 self._send_tms(ptn, ptn_nbits) 116 ptn, ptn_nbits = tms_ptns.TMS_EXIT1_DR_2_SHIFT_DR
108 else: 117 else:
109 raise RuntimeError, 'Transite to shift DR state from invalid state' 118 raise RuntimeError, 'Transite to shift DR state from invalid state'
110 pass 119 pass
120 self._send_tms(ptn, ptn_nbits)
111 self.state = self.ST_SHIFT_DR 121 self.state = self.ST_SHIFT_DR
112 pass 122 pass
113 123
114 def shift_IR(self, data, nbits): 124 def shift_IR(self, data, nbits):
115 self.seq = (self.seq + 1) % 256 125 self.seq = (self.seq + 1) % 256
169 byte_off = bit_idx / 8 179 byte_off = bit_idx / 8
170 bit_off = bit_idx % 8 180 bit_off = bit_idx % 8
171 return (ord(data[byte_off]) >> bit_off) & 0x1 181 return (ord(data[byte_off]) >> bit_off) & 0x1
172 182
173 def identify_components(dev): 183 def identify_components(dev):
174 dev.go_shift_IR() 184 # dev.go_shift_IR()
175 reply = dev.wait_reply() 185 # reply = dev.wait_reply()
176 if reply.code != cmd_proto.CPCMD_ACK: 186 # if reply.code != cmd_proto.CPCMD_ACK:
177 raise RuntimeError, 'invalid reply code 0x%02x' % (reply.code) 187 # raise RuntimeError, 'invalid reply code 0x%02x' % (reply.code)
178 188
179 dev.shift_IR('\x02', 4) 189 # dev.shift_IR('\x04', 4)
180 reply = dev.wait_reply() 190 # reply = dev.wait_reply()
181 if reply.code != cmd_proto.CPCMD_ACK: 191 # if reply.code != cmd_proto.CPCMD_ACK:
182 raise RuntimeError, 'invalid reply code 0x%02x' % (reply.code) 192 # raise RuntimeError, 'invalid reply code 0x%02x' % (reply.code)
183 193
184 dev.go_shift_DR() 194 dev.go_shift_DR()
185 reply = dev.wait_reply() 195 reply = dev.wait_reply()
186 if reply.code != cmd_proto.CPCMD_ACK: 196 if reply.code != cmd_proto.CPCMD_ACK:
187 raise RuntimeError, 'invalid reply code 0x%02x' % (reply.code) 197 raise RuntimeError, 'invalid reply code 0x%02x' % (reply.code)