Rev 3586 Rev 3599
1 #!/usr/bin/python 1 #!/usr/bin/python
2 # 2 #
3 # Utility for setting frequency of Si570 without a frequency measurement. 3 # Utility for setting frequency of Si570 without a frequency measurement.
4 # The factory calibration is used for changing the frequency. 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. 5 # This utility reset the Si570 to factory default 10 MHz first and than set a new frequency.
6 # 6 #
7 # This utility use an USBI2C01A module. 7 # This utility use an USBI2C01A module.
8 # (c) MLAB 2014 8 # (c) MLAB 2014
9   9  
10 import time 10 import time
11 import datetime 11 import datetime
12 import sys 12 import sys
13 from pymlab import config 13 from pymlab import config
14   14  
15 #### Script Arguments ############################################### 15 #### Script Arguments ###############################################
16   16  
17 if (len(sys.argv) != 3): 17 if (len(sys.argv) != 3):
18 sys.stderr.write("Invalid number of arguments.\n") 18 sys.stderr.write("Invalid number of arguments.\n")
19 sys.stderr.write("Usage: %s PORT_ADDRESS/0 REQUIERED_MHz\n" % (sys.argv[0], )) 19 sys.stderr.write("Usage: %s PORT_ADDRESS/0 REQUIERED_MHz\n" % (sys.argv[0], ))
20 sys.exit(1) 20 sys.exit(1)
21   21  
22 port = eval(sys.argv[1]) 22 port = eval(sys.argv[1])
23 #### Sensor Configuration ########################################### 23 #### Sensor Configuration ###########################################
24   24  
25 cfg = config.Config( 25 cfg = config.Config(
26 port = port, 26 port = port,
27 bus = [ 27 bus = [
28 { 28 {
29 "type": "i2chub", 29 "type": "i2chub",
30 "address": 0x70, 30 "address": 0x70,
31 "children": [ 31 "children": [
32 { "name":"clkgen", "type":"clkgen01", "channel": 5, }, 32 { "name":"clkgen", "type":"clkgen01", "channel": 5, },
33 ], 33 ],
34 }, 34 },
35 ], 35 ],
36 ) 36 )
37 cfg.initialize() 37 cfg.initialize()
38   38  
39 fgen = cfg.get_device("clkgen") 39 fgen = cfg.get_device("clkgen")
40 sys.stdout.write("Frequency will be set to " + sys.argv[2] + " MHz.\r\n") 40 sys.stdout.write("Frequency will be set to " + sys.argv[2] + " MHz.\r\n")
41 fgen.reset() # Reset Si570 to 10 MHz 41 fgen.reset() # Reset Si570 to 10 MHz
42 time.sleep(3) 42 time.sleep(3)
43 fgen = cfg.get_device("clkgen") # Reopen CP2112 43 fgen = cfg.get_device("clkgen") # Reopen CP2112
44 fgen.set_freq(10., float(eval(sys.argv[2]))) # Set frequency 44 fgen.set_freq(10., float(eval(sys.argv[2]))) # Set frequency
45 sys.stdout.write("Done.\r\n") 45 sys.stdout.write("Done.\r\n")
46 sys.stdout.flush() 46 sys.stdout.flush()
47 sys.exit(0) 47 sys.exit(0)
48   48