Fix up typos

python/samples/pca9685.py

@@ -1,26 +1,34 @@
+import sys
 import time
 import random
+import struct
+
+from i2cdriver import I2CDriver
 
 class PCA9685:
     def __init__(self, i2, a = 0x40):
         self.i2 = i2
         self.a = a
-        self.regwr(self.a, 0x00, 0x20)  # auto-increment mode
+        self.i2.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,
+        assert 0 <= t_on <= 0x1000
+        assert 0 <= t_off <= 0x1000
+        self.i2.regwr(self.a,
                        0x06 + 4 * channel,
                        struct.pack("<HH", t_on, t_off))
 
 if __name__ == '__main__':
     i2 = I2CDriver(sys.argv[1])
 
+    print(i2.scan())
     d = PCA9685(i2)
 
+    for channel in range(16):
+        d.set(channel, 4096, 0)
+
     while True:
         for channel in range(16):
             d.set(channel, random.randrange(4096), random.randrange(4096))
-            time.sleep(1)
+            time.sleep(.3)