PCA9685 sample

python/samples/pca9685.py

@@ -0,0 +1,26 @@
+import time
+import random
+
+class PCA9685:
+    def __init__(self, i2, a = 0x40):
+        self.i2 = i2
+        self.a = a
+        self.regwr(self.a, 0x00, 0x20)  # auto-increment mode
+
+    def set(self, channel, t_on, t_off):
+        assert 0 <= channel < 16
+        assert 0 <= ton <= 0x1000
+        assert 0 <= toff <= 0x1000
+        self.regwr(self.a,
+                   0x06 + 4 * channel,
+                   struct.pack("<HH", t_on, t_off))
+
+if __name__ == '__main__':
+    i2 = I2CDriver(sys.argv[1])
+
+    d = PCA9685(i2)
+
+    while True:
+        for channel in range(16):
+            d.set(channel, random.randrange(4096), random.randrange(4096))
+            time.sleep(1)