attempted new get_voltage_from_phase method
towards new heaters, dac and table classes. needs testing
Slight progress and tidy up. Testing soon.
testing
slight change to heaters
added option to have no callback in fpga.py
temporarily removed io
minor changes
pete to the rescue
test_callback
this is why it wasn't cooling
writing voltages, reading and cooling all working. reay for more testing
small tidy up
fixed calibration table printing
fixing unicode problems
need more tests
toptica laser
merging alex
merged alex and pete
indents