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#!/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
# Name of the serial port device used.
# CHANGE THIS TO MATCH YOUR DEVICE!
SERIAL_PORT_NAME = '/dev/cu.usbserial-A801SA6T'
# 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 = SERIAL_PORT_NAME
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
#=======================================================================
|
