def main(output_file):
with output_file.open("w") as fh:
fh.write(
textwrap.dedent(
"""\
/* This file is generated by scripts/generate_voice_param_table.py. Do not edit directly. */
/* clang-format off */
#include "gem_lookup_tables.h"
#include "fix16.h"
const struct GemPitchTableEntry gem_pitch_table[] = {
"""
)
)
for note in oscillators.midi_note_range():
voltage = oscillators.midi_note_to_voltage(note)
frequency = oscillators.midi_note_to_frequency(note)
period_reg = oscillators.frequency_to_timer_period(frequency)
fh.write(f" {{.pitch_cv = F16({voltage:.6f}), .period = {period_reg}}},\n")
fh.write(
textwrap.dedent(
"""\
};
struct GemRampTableEntry gem_ramp_table[] = {
"""
)
)
for note in oscillators.calibration_note_range():
voltage = oscillators.midi_note_to_voltage(note)
frequency = oscillators.midi_note_to_frequency(note)
period_reg = oscillators.frequency_to_timer_period(frequency)
dac_code_castor = reference_calibration.castor[period_reg]
dac_code_pollux = reference_calibration.pollux[period_reg]
fh.write(
f" {{.period = {period_reg}, .castor_ramp_cv = {dac_code_castor}, .pollux_ramp_cv = {dac_code_pollux} }},\n"
)
fh.write(
textwrap.dedent(
"""\
};
size_t gem_pitch_table_len = sizeof(gem_pitch_table) / sizeof(struct GemPitchTableEntry);
size_t gem_ramp_table_len = sizeof(gem_ramp_table) / sizeof(struct GemRampTableEntry);
/* clang-format on */
"""
)
)
def set_oscillators_to_note(note, calibration=reference_calibration):
freq = oscillators.midi_note_to_frequency(note)
period = oscillators.frequency_to_timer_period(freq)
charge_code_castor = oscillators.calibrated_charge_code_for_period(
period, calibration.castor)
charge_code_pollux = oscillators.calibrated_charge_code_for_period(
period, calibration.pollux)
print(
f"Note: {note}, Freq: {freq}, Charge codes: {charge_code_castor}, {charge_code_pollux}"
)
gem.set_period(0, period)
gem.set_dac(0, charge_code_castor, 0)
time.sleep(0.1) # Needed so the DAC has time to update EEPROM
gem.set_period(1, period)
gem.set_dac(2, charge_code_pollux, 0)
# Copyright (c) 2021 Alethea Katherine Flowers.
# Published under the standard MIT License.
# Full text available at: https://opensource.org/licenses/MIT
"""Ramp calibration values estimated based on circuit design. These values
will get close to the target ramp voltage, but will probably be a little off.
Generally, reference_calibration is used instead."""
from libgemini import oscillators
castor = {
oscillators.frequency_to_timer_period(
oscillators.midi_note_to_frequency(note)):
oscillators.charge_code_for_frequency(
oscillators.midi_note_to_frequency(note))
for note in oscillators.calibration_note_range()
}
pollux = castor.copy()