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#!/usr/bin/python |
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#!/usr/bin/python |
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# |
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# |
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# Utility for setting frequency of Si570 |
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# Utility for setting frequency of Si570 without a frequency measurement. |
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# The factory calibration is used for changing the frequency. |
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# This utility reset the Si570 to factory default 10 MHz first and than set a new frequency. |
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# |
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# This utility use an USBI2C01A module. |
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# (c) MLAB 2014 |
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import time |
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import time |
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import datetime |
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import datetime |
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import sys |
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import sys |
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from pymlab import config |
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from pymlab import config |
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#### Script Arguments ############################################### |
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#### Script Arguments ############################################### |
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if (len(sys.argv) != 3): |
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if (len(sys.argv) != 3): |
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sys.stderr.write("Invalid number of arguments.\n") |
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sys.stderr.write("Invalid number of arguments.\n") |
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sys.stderr.write("Usage: %s PORT_ADDRESS/0 REQUIERED_MHz\n" % (sys.argv[0], )) |
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sys.stderr.write("Usage: %s PORT_ADDRESS/0 REQUIERED_MHz\n" % (sys.argv[0], )) |
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sys.exit(1) |
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sys.exit(1) |
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port = eval(sys.argv[1]) |
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port = eval(sys.argv[1]) |
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#### Sensor Configuration ########################################### |
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#### Sensor Configuration ########################################### |
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cfg = config.Config( |
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cfg = config.Config( |
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port = port, |
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port = port, |
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bus = [ |
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bus = [ |
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{ |
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{ |
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"type": "i2chub", |
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"type": "i2chub", |
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"address": 0x70, |
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"address": 0x70, |
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"children": [ |
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"children": [ |
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{ "name":"clkgen", "type":"clkgen01", "channel": 5, }, |
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{ "name":"clkgen", "type":"clkgen01", "channel": 5, }, |
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], |
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], |
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}, |
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}, |
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], |
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], |
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) |
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) |
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cfg.initialize() |
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cfg.initialize() |
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fgen = cfg.get_device("clkgen") |
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fgen = cfg.get_device("clkgen") |
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sys.stdout.write("Frequency will be set to " + sys.argv[2] + " MHz.\r\n") |
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sys.stdout.write("Frequency will be set to " + sys.argv[2] + " MHz.\r\n") |
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fgen.reset() |
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fgen.reset() # Reset Si570 to 10 MHz |
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time.sleep(3) |
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time.sleep(3) |
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fgen = cfg.get_device("clkgen") |
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fgen = cfg.get_device("clkgen") # Reopen CP2112 |
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fgen.set_freq(10., float(eval(sys.argv[2]))) |
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fgen.set_freq(10., float(eval(sys.argv[2]))) # Set frequency |
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sys.stdout.write("Done.\r\n") |
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sys.stdout.write("Done.\r\n") |
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sys.stdout.flush() |
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sys.stdout.flush() |
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sys.exit(0) |
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sys.exit(0) |
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