File size: 1,936 Bytes
7df9186 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | #!/usr/bin/python
# Test pattern substituting for SRF cavity analog state computer
# Takes in cavity field, forward, and reverse vector measurements
# and emits a test pattern standing in for the cavity detune frequency.
# Output of this program should be both valid c99 and valid input
# for the scheduler/mapper.
# See the rest of the Digaree infrastructure for details.
from cgen_lib import cgen_init, given, mul, add, sub, cpx_mul
from cgen_lib import cpx_scale
from cgen_lib import cpx_mag, set_result, cpx_persist, cpx_add
cgen_init("cgen_srf.py")
# History of measured cavity voltages, used to compute dV/dt
# Initial value in simulation should be settable from initgen?
# Cut-and-paste for now, until we at least get the right answer.
cpx_persist("sv")
# These lines declare the input variables,
# first six streamed from the radio
given("k_r") # forward
given("k_i") # forward
given("r_r") # reverse
given("r_i") # reverse
given("v_r") # cavity
given("v_i") # cavity
# next eight host-settable
given("beta_r")
given("beta_i")
given("invT")
given("two") # needed by 1/x macro
given("sclr")
given("sclf")
given("kick_r")
given("kick_i")
# Start-up plan:
# beta = 1
# kick = 0.1
# (wait)
# kick = 0
# (wait)
# beta = exp(j*theta)
# should then get a sine wave with frequency theta/dT
cpx_mul("x1", "sv", "beta", 1, 1) # rotate by theta, beta = exp(j*theta)
cpx_add("x2", "x1", "kick", 1)
cpx_mag("m1", "x2", 0)
sub("m2", "two", "m1", 2)
cpx_scale("sv", "x2", "m2", 2)
set_result("ab", "sv_r", "sv_i")
# Copied from real srf version
# Power balance measure of cavity dissipation; uses magnitudes only
cpx_mag("magr", "r", 0) # reverse
mul("powr", "sclr", "magr", 0)
cpx_mag("magf", "k", 0) # forward
mul("powf", "sclf", "magf", 0)
sub("wgnet", "powf", "powr", 1) # net power transferred by waveguide
# Made-up
cpx_mag("magv", "v", 0)
add("diss", "wgnet", "magv", 0)
set_result("cd", "diss", "invT")
|