107 lines
2.8 KiB
Python
Executable File
107 lines
2.8 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
import redis
|
|
import time
|
|
from serial import Serial, SerialException
|
|
import sys
|
|
import os
|
|
|
|
max_height = 32
|
|
max_width = 8
|
|
max_framerate = 40
|
|
|
|
# Use dummy to test the Processing code without have access to actual hardware
|
|
serialDevice = 'dummy'
|
|
|
|
# OSX serial device for teensy (not the same everywhere but gives a good indications what it might look like)
|
|
#serialDevice = '/dev/tty.usbmodem807701'
|
|
|
|
# Linux Serial device
|
|
#serialDevice = '/dev/ttyACM0'
|
|
|
|
wait_time = None
|
|
|
|
|
|
def update_framerate():
|
|
global wait_time
|
|
new_framerate = int(r.hget('config', 'cur_framerate'))
|
|
if new_framerate >= max_framerate or new_framerate == 0:
|
|
wait_time = 1.0 / max_framerate
|
|
else:
|
|
wait_time = 1.0 / new_framerate
|
|
|
|
|
|
def send(r, s):
|
|
os.system('clear')
|
|
print(r.llen('new'))
|
|
data = r.rpop('new')
|
|
if data is not None and len(data) > 0:
|
|
now = time.time()
|
|
end = now + wait_time
|
|
a = bytes([ord('*')]) + bytearray(data) + bytes([ord('#')])
|
|
if s != 'dummyMode':
|
|
s.write(a)
|
|
time.sleep(end - now)
|
|
|
|
|
|
def serialConfigure(port_name, baudrate=9600):
|
|
'''
|
|
We use a very low baudrate by default because the USB port on the teensy
|
|
enforce this value: http://www.pjrc.com/teensy/td_serial.html
|
|
'''
|
|
if port_name == 'dummy':
|
|
print("Dummy mode detected, disabling Serial comms")
|
|
time.sleep(1)
|
|
ser = 'dummyMode'
|
|
return ser
|
|
|
|
ser = Serial()
|
|
ser.port = port_name
|
|
ser.baudrate = baudrate
|
|
ser.timeout = 5
|
|
try:
|
|
ser.open()
|
|
except SerialException as e:
|
|
sys.stderr.write("Could not open serial port %s: %s\n" % (ser.portstr, e))
|
|
return
|
|
|
|
ledsPerStrip = max_height * max_width
|
|
print(ledsPerStrip)
|
|
ser.write(ledsPerStrip.to_bytes(4, byteorder='little'))
|
|
|
|
data = ser.read(4)
|
|
print(data, int.from_bytes(data, byteorder='little'))
|
|
|
|
ser.timeout = 1
|
|
return ser
|
|
|
|
|
|
def serialDataConfigure(port_name, baudrate=115200):
|
|
ser = Serial()
|
|
ser.port = port_name
|
|
ser.baudrate = baudrate
|
|
try:
|
|
ser.open()
|
|
except SerialException as e:
|
|
sys.stderr.write("Could not open serial port %s: %s\n" % (ser.portstr, e))
|
|
return
|
|
|
|
ser.timeout = 1
|
|
return ser
|
|
|
|
if __name__ == "__main__":
|
|
r = redis.Redis()
|
|
r.hset('config', 'height', max_height)
|
|
r.hset('config', 'width', max_width)
|
|
r.hset('config', 'imgsize', max_height * max_width * 24)
|
|
r.hset('config', 'max_framerate', max_framerate)
|
|
r.hset('config', 'cur_framerate', max_framerate)
|
|
s = serialConfigure(serialDevice)
|
|
# s_data = serialDataConfigure('/dev/ttyUSB0')
|
|
wait_time = 1.0 / max_framerate
|
|
while True:
|
|
while r.llen('new') > 0:
|
|
send(r, s)
|
|
time.sleep(1)
|
|
update_framerate()
|