step_response.py

   1 #!/usr/bin/env python
   2 # -*- coding: iso-8859-15 -*-
   3
   4 import struct
   5 from time import sleep
   6 from i2c import i2c_write_reg, i2c_read_reg
   7
   8
   9 def set_pwm(val):
  10         i2c_write_reg(0x50, 0x1, struct.pack(">H", val))
  11         i2c_write_reg(0x50, 0x3, struct.pack(">H", val))
  12         i2c_write_reg(0x50, 0x5, struct.pack(">H", val))
  13         i2c_write_reg(0x50, 0x7, struct.pack(">H", val))
  14
  15 if __name__ == "__main__":
  16         set_pwm(210)
  17         sleep(3)
  18         set_pwm(0)