1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
|
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#=======================================================================
#
# core_tester.py
# --------------
# This program sends several commands to the coretest subsystem
# in order to check the functionality of the uart and test_core
# cores connected to coretest.
#
# Note: This proram requires the PySerial module.
# http://pyserial.sourceforge.net/
#
#
# Author: Joachim Strömbergson
# Copyright (c) 2014 SUNET
#
# Redistribution and use in source and binary forms, with or
# without modification, are permitted provided that the following
# conditions are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#=======================================================================
#-------------------------------------------------------------------
# Python module imports.
#-------------------------------------------------------------------
import sys
import serial
import os
import time
import threading
#-------------------------------------------------------------------
# Defines.
#-------------------------------------------------------------------
VERBOSE = False
# Memory map.
SOC = '\x55'
EOC = '\xaa'
READ_CMD = '\x10'
WRITE_CMD = '\x11'
TEST_CORE_ADDR_PREFIX = '\x01'
UART_ADDR_PREFIX = '\x02'
NAME0_ADDR = '\x00'
NAME1_ADDR = '\x01'
TYPE_ADDR = '\x02'
VERSION_ADDR = '\x03'
TEST_CORE_RW_REG = '\x10'
TEST_CORE_DEBUG_REG = '\x20'
#-------------------------------------------------------------------
# print_response()
#
# Parses a received buffer and prints the response.
#-------------------------------------------------------------------
def print_response(buffer):
if VERBOSE:
print "Length of response: %d" % len(buffer)
if buffer[0] == '\xaa':
print "Response contains correct Start of Response (SOR)"
if buffer[-1] == '\x55':
print "Response contains correct End of Response (EOR)"
response_code = ord(buffer[1])
if response_code == 0xfe:
print "UNKNOWN response code received."
elif response_code == 0xfd:
print "ERROR response code received."
elif response_code == 0x7f:
read_addr = ord(buffer[2]) * 256 + ord(buffer[3])
read_data = (ord(buffer[4]) * 16777216) + (ord(buffer[5]) * 65536) +\
(ord(buffer[6]) * 256) + ord(buffer[7])
print "READ_OK. address 0x%02x = 0x%04x." % (read_addr, read_data)
elif response_code == 0x7e:
read_addr = ord(buffer[2]) * 256 + ord(buffer[3])
print "WRITE_OK. address 0x%02x." % (read_addr)
elif response_code == 0x7d:
print "RESET_OK."
else:
print "Response 0x%02x is unknown." % response_code
print buffer
#-------------------------------------------------------------------
# read_serial_thread()
#
# Function used in a thread to read from the serial port and
# collect response from coretest.
#-------------------------------------------------------------------
def read_serial_thread(serialport):
if VERBOSE:
print "Serial port response thread started. Waiting for response..."
buffer = []
while True:
response = serialport.read()
buffer.append(response)
if response == '\x55':
print_response(buffer)
buffer = []
#-------------------------------------------------------------------
# write_serial_bytes()
#
# Send the bytes in the buffer to coretest over the serial port.
#-------------------------------------------------------------------
def write_serial_bytes(tx_cmd, serialport):
if VERBOSE:
print "Command to be sent:", tx_cmd
for tx_byte in tx_cmd:
serialport.write(tx_byte)
# Allow the device to complete the transaction.
time.sleep(0.1)
#-------------------------------------------------------------------
# main()
#
# Parse arguments.
#-------------------------------------------------------------------
def main():
# Open device
ser = serial.Serial()
ser.port='/dev/cu.usbserial-A801SA6T'
ser.baudrate=9600
ser.bytesize=8
ser.parity='N'
ser.stopbits=1
ser.timeout=1
ser.writeTimeout=0
if VERBOSE:
print "Setting up a serial port and starting a receive thread."
try:
ser.open()
except:
print "Error: Can't open serial device."
sys.exit(1)
try:
my_thread = threading.Thread(target=read_serial_thread, args=(ser,))
except:
print "Error: Can't start thread."
sys.exit()
my_thread.daemon = True
my_thread.start()
# TC1: Read name, type and version from test_core:
print "TC1: Reading name, type and version words from test_core."
my_cmd = [SOC, READ_CMD, TEST_CORE_ADDR_PREFIX, NAME0_ADDR, EOC]
write_serial_bytes(my_cmd, ser)
my_cmd = [SOC, READ_CMD, TEST_CORE_ADDR_PREFIX, NAME1_ADDR, EOC]
write_serial_bytes(my_cmd, ser)
my_cmd = [SOC, READ_CMD, TEST_CORE_ADDR_PREFIX, TYPE_ADDR, EOC]
write_serial_bytes(my_cmd, ser)
my_cmd = [SOC, READ_CMD, TEST_CORE_ADDR_PREFIX, VERSION_ADDR, EOC]
write_serial_bytes(my_cmd, ser)
# TC2: Read id0, id1 and version from test_core:
print "TC2: Reading id and version words from uart."
my_cmd = [SOC, READ_CMD, UART_ADDR_PREFIX, NAME0_ADDR, EOC]
write_serial_bytes(my_cmd, ser)
my_cmd = [SOC, READ_CMD, UART_ADDR_PREFIX, NAME1_ADDR, EOC]
write_serial_bytes(my_cmd, ser)
my_cmd = [SOC, READ_CMD, UART_ADDR_PREFIX, TYPE_ADDR, EOC]
write_serial_bytes(my_cmd, ser)
my_cmd = [SOC, READ_CMD, UART_ADDR_PREFIX, VERSION_ADDR, EOC]
write_serial_bytes(my_cmd, ser)
# TC3: Read, write, read and write again from the RW register in the test core.
print "TC3: Read, write, read and write again from the RW register in the test core."
my_cmd = [SOC, READ_CMD, TEST_CORE_ADDR_PREFIX, TEST_CORE_RW_REG, EOC]
write_serial_bytes(my_cmd, ser)
test_pattern = ['\xde', '\xad', '\xbe', '\xef']
my_cmd = [SOC, WRITE_CMD, TEST_CORE_ADDR_PREFIX, TEST_CORE_RW_REG] + test_pattern + [EOC]
write_serial_bytes(my_cmd, ser)
my_cmd = [SOC, READ_CMD, TEST_CORE_ADDR_PREFIX, TEST_CORE_RW_REG, EOC]
write_serial_bytes(my_cmd, ser)
test_pattern = ['\x13', '\x37', '\xfe', '\xed']
my_cmd = [SOC, WRITE_CMD, TEST_CORE_ADDR_PREFIX, TEST_CORE_RW_REG] + test_pattern + [EOC]
write_serial_bytes(my_cmd, ser)
my_cmd = [SOC, READ_CMD, TEST_CORE_ADDR_PREFIX, TEST_CORE_RW_REG, EOC]
write_serial_bytes(my_cmd, ser)
# TC4: Write a sequence of words to the debug registers. This should be visible on the leds."
for i in range (0, 256, 7):
print "Sending write command: address 0x0120 = 0x%08x." % i
my_cmd = [SOC, WRITE_CMD, TEST_CORE_ADDR_PREFIX, TEST_CORE_DEBUG_REG] +\
['\x00', '\x00', '\x00'] + [chr(i)] + [EOC]
for tx_byte in my_cmd:
ser.write(tx_byte)
time.sleep(0.01)
# Exit nicely.
if VERBOSE:
print "Done. Closing device."
ser.close()
#-------------------------------------------------------------------
# __name__
# Python thingy which allows the file to be run standalone as
# well as parsed from within a Python interpreter.
#-------------------------------------------------------------------
if __name__=="__main__":
# Run the main function.
sys.exit(main())
#=======================================================================
# EOF serial_write_sequence.py
#=======================================================================
|
