Basic Operation¶
examples/qwiic_pca9685_ex1.py¶
1import qwiic_pca9685
2import time
3import math
4import sys
5
6def runExample():
7
8 print("\nSparkFun BME280 Sensor Example 1\n")
9 mySensor = qwiic_pca9685.QwiicPCA9685()
10
11 if mySensor.isConnected() == False:
12 print("The Qwiic PCA9685 device isn't connected to the system. Please check your connection", \
13 file=sys.stderr)
14 return
15
16 mySensor.begin()
17
18 # Sets PWM Frequency to 50 Hz
19 mySensor.set_pre_scale(50)
20
21 # Sets start time of PWM pulse on Channel 0 to 0s
22 mySensor.set_channel_word(0, 1, 0)
23
24
25 while True:
26 # Increments start time of PWM pulse on Channel 0 to i (1ms to 2ms)
27 for i in range(205, 410):
28 fun.set_channel_word(0, 0, i)
29 # Delay .05 s
30 time.sleep(.05)
31
32 # Decrements start time of PWM pulse on Channel 0 to i (2ms to 1ms)
33 for i in range(410, 205, -1):
34 fun.set_channel_word(0, 0, i)
35 # Delay .05 s
36 time.sleep(.05)
37
38 time.sleep(1)