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Fix for issue sparkfun/Apollo3_Uploader_SVL#4 #6

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Fix for issue sparkfun/Apollo3_Uploader_SVL#4 #6

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d820c9b
Fix for issue sparkfun/Apollo3_Uploader_SVL#4
nigelb Jun 9, 2021
9840d6a
Extra Fix for issue sparkfun/Apollo3_Uploader_SVL#4
nigelb Jun 9, 2021
8f0d16a
Add verbose print statement when change port settings
nigelb Jun 9, 2021
0d31d95
Add --reset-port CLI option to reset the serial port.
nigelb Jun 11, 2021
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24 changes: 24 additions & 0 deletions svl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -36,11 +36,13 @@
import argparse
import serial
import serial.tools.list_ports as list_ports
import termios
import sys
import time
import math
import os.path
from sys import exit
import platform as sys_pf

SCRIPT_VERSION_MAJOR = "1"
SCRIPT_VERSION_MINOR = "7"
Expand Down Expand Up @@ -336,9 +338,28 @@ def main():
bl_success = False
entered_bootloader = False

system_type = sys_pf.system().lower()
for _ in range(num_tries):

with serial.Serial(args.port, args.baud, timeout=args.timeout) as ser:
# Set port to known state
if args.reset_port:
if system_type == "linux":
attrs = termios.tcgetattr(ser.fd)
c_iflag = 0
c_oflag = 0
port_speed = attrs[4]
c_cflag = termios.CS8 | termios.CREAD | termios.HUPCL | termios.CLOCAL | port_speed
c_lflag = 0
c_ispeed = port_speed
c_ospeed = port_speed

new_attrs = [c_iflag, c_oflag, c_cflag, c_lflag, c_ispeed, c_ospeed, attrs[6]]
if attrs != new_attrs:
verboseprint("Resetting Port config")
termios.tcsetattr(ser.fd, termios.TCSANOW, new_attrs)
ser.close()
ser.open()

# startup time for Artemis bootloader (experimentally determined - 0.095 sec min delay)
t_su = 0.15
Expand Down Expand Up @@ -393,6 +414,9 @@ def main():
parser.add_argument("-t", "--timeout", default=0.50, help="Communication timeout in seconds (default 0.5)",
type=float)

parser.add_argument("-r", "--reset-port", action="store_true", default=False,
help="Reset the port configuration.")

if len(sys.argv) < 2:
print("No port selected. Detected Serial Ports:")
devices = list_ports.comports()
Expand Down