Rev Author Line No. Line
3585 kakl 1 #!/usr/bin/python
2 #
3586 kakl 3 # Utility for setting frequency of Si570 without a frequency measurement.
4 # The factory calibration is used for changing the frequency.
5 # This utility reset the Si570 to factory default 10 MHz first and than set a new frequency.
6 #
7 # This utility use an USBI2C01A module.
8 # (c) MLAB 2014
3585 kakl 9  
10 import time
11 import datetime
12 import sys
13 from pymlab import config
14  
15 #### Script Arguments ###############################################
16  
17 if (len(sys.argv) != 3):
18 sys.stderr.write("Invalid number of arguments.\n")
19 sys.stderr.write("Usage: %s PORT_ADDRESS/0 REQUIERED_MHz\n" % (sys.argv[0], ))
20 sys.exit(1)
21  
22 port = eval(sys.argv[1])
23 #### Sensor Configuration ###########################################
24  
25 cfg = config.Config(
26 port = port,
27 bus = [
28 {
29 "type": "i2chub",
30 "address": 0x70,
31 "children": [
32 { "name":"clkgen", "type":"clkgen01", "channel": 5, },
33 ],
34 },
35 ],
36 )
37 cfg.initialize()
38  
3586 kakl 39 fgen = cfg.get_device("clkgen")
3585 kakl 40 sys.stdout.write("Frequency will be set to " + sys.argv[2] + " MHz.\r\n")
3586 kakl 41 fgen.reset() # Reset Si570 to 10 MHz
3585 kakl 42 time.sleep(3)
3586 kakl 43 fgen = cfg.get_device("clkgen") # Reopen CP2112
44 fgen.set_freq(10., float(eval(sys.argv[2]))) # Set frequency
3585 kakl 45 sys.stdout.write("Done.\r\n")
46 sys.stdout.flush()
47 sys.exit(0)
48