increased SP10 PWM speed as much as possible without making ramp bumpy, and made party strobe pulses much faster

Reduced max PWM TOP to 3072, because 2048 wasn't enough and 4096 was more than necessary.
Also, Ch1 lumens / 256 / ch2 lumens = 6, so 256 * 6 * 2 is the lowest value
which allows ch1 to start at half of ch2's power.  I tried 1536 initially, but it made the
ramp visibly malformed at the channel boundary.  However, 3072 seems about right.

Implemented a non-linear PWM_TOP ramp-down in level_calc,
to allow it to converge faster and reduce the number of levels with visible pulses.

Added an option to keep the regulator chips on between strobe pulses,
by keeping the LEDs at moon instead of turning completely off.
This allows the SP10 party strobe to use much shorter, more consistent pulses.

1 files changed, 7 insertions, 1 deletions

diff --git a/bin/level_calc.py b/bin/level_calc.py
index 2998b44..60416db 100755
--- a/bin/level_calc.py
+++ b/bin/level_calc.py
@@ -65,10 +65,16 @@ def main(args):
             dpwm_steps = int(parts[1])
             dpwn_max = int(parts[2])
             dpwn_min = int(parts[3])
+            dpwm_shape = 'linear'
+            if parts[4]:
+                dpwm_shape = float(parts[4])
             max_pwms = [dpwn_min] * answers.num_levels
             for i in range(dpwm_steps):
                 span = dpwn_max - dpwn_min
-                x = dpwn_min + (span * (float(dpwm_steps - i) / dpwm_steps))
+                if dpwm_shape == 'linear':
+                    x = dpwn_min + (span * (float(dpwm_steps - i) / dpwm_steps))
+                else:  # variable curve
+                    x = dpwn_min + (span * ((float(dpwm_steps - i) / dpwm_steps) ** dpwm_shape))
                 max_pwms[i] = int(x)
             max_pwm = dpwn_min