mapid/fifo_bridge.py

66 lines
1.2 KiB
Python
Raw Normal View History

2023-10-15 18:02:31 +02:00
#!/usr/bin/env python3
import os
import sys
import time
import mapid
from serial.serialutil import SerialException
2023-10-15 18:02:31 +02:00
2023-10-27 00:19:10 +02:00
mapid.load_dotenv()
FIFO = os.environ.get("FIFO")
2023-10-15 18:02:31 +02:00
def main():
global FIFO
if len(sys.argv) == 2:
FIFO = sys.argv[1]
2023-11-08 19:59:03 +01:00
# Write PID
FIFO_BRIDGE_PID_FILE = os.environ.get("FIFO_BRIDGE_PID_FILE")
f = open(FIFO_BRIDGE_PID_FILE, "w")
f.write(os.getpid())
f.close()
del f
# Create MAPIDCP object to communicate with the Arduino
2023-10-15 18:02:31 +02:00
m = mapid.MAPIDCP()
2023-11-08 19:59:03 +01:00
# Create FIFO
2023-10-15 18:02:31 +02:00
os.mkfifo(FIFO)
time.sleep(0.2)
print("Created FIFO " + FIFO, file=sys.stderr)
2023-10-15 18:02:31 +02:00
f = open(FIFO, "r")
print("Opened FIFO for reading", file=sys.stderr)
2023-11-08 19:59:03 +01:00
# Show greeting on screen
2023-10-15 18:02:31 +02:00
m.cls()
m.line(1)
m.echo("fifo_bridge.py")
m.line(2)
m.echo(FIFO)
2023-11-08 19:59:03 +01:00
# Main loop: read commands from FIFO and execute it
2023-10-15 18:02:31 +02:00
keep_going = True
while keep_going:
try:
line = f.readline().strip("\n")
m._cmd(line)
except KeyboardInterrupt:
keep_going = False
print()
except SerialException:
keep_going = False
print("Caught a SerialException. Exiting now...", file=sys.stderr)
2023-10-15 18:02:31 +02:00
2023-11-08 19:59:03 +01:00
# Remove FIFO and PID files
2023-10-15 18:02:31 +02:00
os.remove(FIFO)
2023-11-08 19:59:03 +01:00
os.remove(FIFO_BRIDGE_PID_FILE)
2023-10-15 18:02:31 +02:00
print("Removed FIFO.", file=sys.stderr)
if __name__ == "__main__":
main()