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impl offsets. to be tested

This commit is contained in:
SingularitySurfer 2022-06-22 16:20:59 +00:00
parent 43c94577ce
commit c0581178d6
1 changed files with 4 additions and 2 deletions
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6
artiq/coredevice/phaser.py
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@ -69,6 +69,7 @@ PHASER_DAC_SEL_TEST = 1
PHASER_HW_REV_VARIANT = 1 << 4
SERVO_COEFF_WIDTH = 16
SERVO_DATA_WIDTH = 16
SERVO_COEFF_SHIFT = 14
SERVO_T_CYCLE = (32+12+192+24+4)*ns # Must match gateware ADC parameters
@ -1121,6 +1122,7 @@ class PhaserChannel:
NORM = 1 << SERVO_COEFF_SHIFT
COEFF_MAX = 1 << SERVO_COEFF_WIDTH - 1
DATA_MAX = 1 << SERVO_DATA_WIDTH - 1
kp *= NORM
if ki == 0.:
@ -1146,8 +1148,8 @@ class PhaserChannel:
b1 >= COEFF_MAX or b1 < -COEFF_MAX):
raise ValueError("high gains")
forward_gain = b0 + b1
effective_offset = y_offset + forward_gain * x_offset
forward_gain = (b0 + b1) * (DATA_MAX - NORM)
effective_offset = int(round(DATA_MAX * y_offset + forward_gain * x_offset))
self.set_iir_mu(profile, b0, b1, a1, effective_offset)