self.lnk_present = 0
self.lnk_bit = 0
# Network layer variables
- self.net_state = 'WAIT FOR COMMAND'
+ self.net_state = 'ROM COMMAND'
self.net_event = 'NONE'
self.net_cnt = 0
- self.net_cmd = 0
+ self.net_search = "P"
+ self.net_data_p = 0x0
+ self.net_data_n = 0x0
+ self.net_data = 0x0
# Transport layer variables
self.trn_state = 'WAIT FOR EVENT'
self.trn_event = 'NONE'
self.lnk_state = 'WAIT FOR DATA SAMPLE'
self.put(self.lnk_fall, self.samplenum, self.out_ann,
[ANN_DEC, ['LNK: NEGEDGE: ']])
- print ("DEBUG: NEGEDGE t0=%d t+=%d" % (self.lnk_fall, self.samplenum))
elif self.lnk_state == 'WAIT FOR DATA SAMPLE':
# Data should be sample one 'time unit' after a falling edge
- if (self.samplenum - self.lnk_fall == 1*self.time_base):
+ if (self.samplenum - self.lnk_fall == 0.5*self.time_base):
self.lnk_bit = owr & 0x1
self.lnk_event = "DATA BIT"
if (self.lnk_bit) : self.lnk_state = 'WAIT FOR FALLING EDGE'
else : self.lnk_state = 'WAIT FOR RISING EDGE'
self.put(self.lnk_fall, self.samplenum, self.out_ann,
[ANN_DEC, ['LNK: BIT: ' + str(self.lnk_bit)]])
- print ("DEBUG: BIT=%d t0=%d t+=%d" % (self.lnk_bit, self.lnk_fall, self.samplenum))
elif self.lnk_state == 'WAIT FOR RISING EDGE':
# The end of a cycle is a rising edge.
if (owr == 1):
# Data should be sample one 'time unit' after a falling edge
if (self.samplenum - self.lnk_rise == 2.5*self.time_base):
self.lnk_present = owr & 0x1
+ # Save the sample number for the falling edge.
+ if not (self.lnk_present) : self.lnk_fall = self.samplenum
+ # create presence detect event
#self.lnk_event = "PRESENCE DETECT"
- if (self.lnk_bit) : self.lnk_state = 'WAIT FOR FALLING EDGE'
- else : self.lnk_state = 'WAIT FOR RISING EDGE'
+ if (self.lnk_present) : self.lnk_state = 'WAIT FOR FALLING EDGE'
+ else : self.lnk_state = 'WAIT FOR RISING EDGE'
self.put(self.lnk_fall, self.samplenum, self.out_ann,
[ANN_DEC, ['LNK: PRESENCE: ' + str(self.lnk_present)]])
print ("DEBUG: PRESENCE=%d t0=%d t+=%d" % (self.lnk_present, self.lnk_fall, self.samplenum))
self.net_event = "RESET"
# State machine.
if (self.lnk_event == "RESET"):
- self.net_state = "WAIT FOR COMMAND"
- self.net_cnt = 0
- self.net_cmd = 0
+ self.net_state = "ROM COMMAND"
+ self.net_search = "P"
+ self.net_cnt = 0
elif (self.lnk_event == "DATA BIT"):
- if (self.net_state == "WAIT FOR COMMAND"):
- self.net_cnt = self.net_cnt + 1
- self.net_cmd = (self.net_cmd << 1) & self.lnk_bit
- if (self.net_cnt == 8):
- self.put(self.lnk_fall, self.samplenum,
- self.out_proto, ['LNK: COMMAND', self.net_cmd])
+ if (self.net_state == "ROM COMMAND"):
+ if (self.collect_data(8)):
+# self.put(self.lnk_fall, self.samplenum,
+# self.out_proto, ['LNK: COMMAND', self.net_data])
self.put(self.lnk_fall, self.samplenum, self.out_ann,
- [ANN_DEC, ['LNK: COMMAND: ' + self.net_cmd]])
- if (self.net_cmd == 0x33):
+ [ANN_DEC, ['NET: ROM COMMAND: 0x' + hex(self.net_data)]])
+ print ("DEBUG: ROM_COMMAND=0x%02x t0=%d t+=%d" % (self.net_data, self.lnk_fall, self.samplenum))
+ if (self.net_data == 0x33):
# READ ROM
- break
- elif (self.net_cmd == 0x0f):
- # READ ROM
- break
- elif (self.net_cmd == 0xcc):
+ self.net_state = "ADDRESS"
+ elif (self.net_data == 0x0f):
+ # READ ROM TODO
+ self.net_state = "ADDRESS"
+ elif (self.net_data == 0xcc):
# SKIP ROM
- break
- elif (self.net_cmd == 0x55):
+ self.net_state = "CONTROL COMMAND"
+ elif (self.net_data == 0x55):
# MATCH ROM
- break
- elif (self.net_cmd == 0xf0):
+ self.net_state = "ADDRESS"
+ elif (self.net_data == 0xf0):
# SEARCH ROM
- break
- elif (self.net_cmd == 0x3c):
+ self.net_state = "SEARCH"
+ elif (self.net_data == 0x3c):
# OVERDRIVE SKIP ROM
- break
- elif (self.net_cmd == 0x69):
+ self.net_state = "CONTROL COMMAND"
+ elif (self.net_data == 0x69):
# OVERDRIVE MATCH ROM
- break
- self.net_cnt = 0
- elif (self.net_state == "WAIT FOR ROM"):
- #
- break
+ self.net_state = "ADDRESS"
+ elif (self.net_state == "ADDRESS"):
+ # family code (1B) + serial number (6B) + CRC (1B)
+ if (self.collect_data((1+6+1)*8)):
+ self.net_address = self.net_data & 0xffffffffffffffff
+ self.net_state = "CONTROL COMMAND"
+ elif (self.net_state == "SEARCH"):
+ # family code (1B) + serial number (6B) + CRC (1B)
+ if (self.collect_search((1+6+1)*8)):
+ self.net_address = self.net_data & 0xffffffffffffffff
+ self.net_state = "CONTROL COMMAND"
+ elif (self.net_state == "CONTROL COMMAND"):
+ if (self.collect_data(8)):
+# self.put(self.lnk_fall, self.samplenum,
+# self.out_proto, ['LNK: COMMAND', self.net_data])
+ self.put(self.lnk_fall, self.samplenum, self.out_ann,
+ [ANN_DEC, ['NET: FUNCTION COMMAND: 0x' + hex(self.net_data)]])
+ print ("DEBUG: FUNCTION_COMMAND=0x%02x t0=%d t+=%d" % (self.net_data, self.lnk_fall, self.samplenum))
+ if (self.net_data == 0x48):
+ # COPY SCRATCHPAD
+ self.net_state = "TODO"
+ elif (self.net_data == 0x4e):
+ # WRITE SCRATCHPAD
+ self.net_state = "TODO"
+ elif (self.net_data == 0xbe):
+ # READ SCRATCHPAD
+ self.net_state = "TODO"
+ elif (self.net_data == 0xb8):
+ # RECALL E2
+ self.net_state = "TODO"
+ elif (self.net_data == 0xb4):
+ # READ POWER SUPPLY
+ self.net_state = "TODO"
+ else:
+ # unsupported commands
+ self.net_state = "UNDEFINED"
+ elif (self.net_state == "UNDEFINED"):
+ pass
else:
- raise Exception('Invalid net_state: %d' % self.net_state)
- elif not (self.lnk_event == "NONE"):
+ raise Exception('Invalid net_state: %s' % self.net_state)
+ elif (self.lnk_event != "NONE"):
raise Exception('Invalid lnk_event: %s' % self.lnk_event)
-# if (self.samplenum == self.lnk_start + 8*self.time_base):
-# self.put(self.lnk_fall, self.samplenum - 1, self.out_proto, ['RESET'])
+ # Link/Network layer data collector
+ def collect_data (self, length):
+ #print ("DEBUG: BIT=%d t0=%d t+=%d" % (self.lnk_bit, self.lnk_fall, self.samplenum))
+ self.net_data = self.net_data & ~(1 << self.net_cnt) | (self.lnk_bit << self.net_cnt)
+ self.net_cnt = self.net_cnt + 1
+ if (self.net_cnt == length):
+ self.net_data = self.net_data & ((1<<length)-1)
+ self.net_cnt = 0
+ print ("DEBUG: DATA=0x%0x t0=%d t+=%d" % (self.net_data, self.lnk_fall, self.samplenum))
+ return (1)
+ else:
+ return (0)
+
+ # Link/Network layer search collector
+ def collect_search (self, length):
+ #print ("DEBUG: SEARCH=%s BIT=%d t0=%d t+=%d" % (self.net_search, self.lnk_bit, self.lnk_fall, self.samplenum))
+ if (self.net_search == "P"):
+ self.net_data_p = self.net_data_p & ~(1 << self.net_cnt) | (self.lnk_bit << self.net_cnt)
+ self.net_search = "N"
+ elif (self.net_search == "N"):
+ self.net_data_n = self.net_data_n & ~(1 << self.net_cnt) | (self.lnk_bit << self.net_cnt)
+ self.net_search = "D"
+ elif (self.net_search == "D"):
+ self.net_data = self.net_data & ~(1 << self.net_cnt) | (self.lnk_bit << self.net_cnt)
+ self.net_search = "P"
+ self.net_cnt = self.net_cnt + 1
+ if (self.net_cnt == length):
+ self.net_data_p = self.net_data_p & ((1<<length)-1)
+ self.net_data_n = self.net_data_n & ((1<<length)-1)
+ self.net_data = self.net_data & ((1<<length)-1)
+ self.net_search = "P"
+ self.net_cnt = 0
+ print ("DEBUG: SEARCH_P=0x%0x t0=%d t+=%d" % (self.net_data_p, self.lnk_fall, self.samplenum))
+ print ("DEBUG: SEARCH_N=0x%0x t0=%d t+=%d" % (self.net_data_n, self.lnk_fall, self.samplenum))
+ print ("DEBUG: SEARCH =0x%0x t0=%d t+=%d" % (self.net_data , self.lnk_fall, self.samplenum))
+ return (1)
+ else:
+ return (0)
projects / libsigrokdecode.git / blobdiff