merged Noctigon KR4 and K1-12V (XHP35) branches

(also includes some minor thermal updates to make it faster, more stable, and easier to tweak per host)
(and some code to prevent eeprom corruption while turning power chips on/off)
(and enables reboot function on tiny1634)
(and makes rainbow aux RGB mode speed configurable per host)
(and calibrates the original K1 a bit better)

14 files changed, 542 insertions, 23 deletions

diff --git a/hwdef-Noctigon_K1-12V.h b/hwdef-Noctigon_K1-12V.h
new file mode 100644
index 0000000..7beb205
--- /dev/null
+++ b/hwdef-Noctigon_K1-12V.h
@@ -0,0 +1,140 @@
+#ifndef HWDEF_NOCTIGON_K1_12V_H
+#define HWDEF_NOCTIGON_K1_12V_H
+
+/* Noctigon K1 driver layout (attiny1634)
+ * (originally known as Emisar D1S V2)
+ *
+ * Pin / Name / Function
+ *   1    PA6   (none) (PWM1B) (reserved for DD drivers)
+ *   2    PA5   R: red aux LED (PWM0B)
+ *   3    PA4   G: green aux LED
+ *   4    PA3   B: blue aux LED
+ *   5    PA2   (none) (reserved for L: button LED (on some models))
+ *   6    PA1   (none)
+ *   7    PA0   (none)
+ *   8    GND   GND
+ *   9    VCC   VCC
+ *  10    PC5   (none)
+ *  11    PC4   (none)
+ *  12    PC3   RESET
+ *  13    PC2   (none)
+ *  14    PC1   SCK
+ *  15    PC0   boost PMIC enable (PWM0A not used)
+ *  16    PB3   main LED PWM (PWM1A)
+ *  17    PB2   MISO
+ *  18    PB1   MOSI / battery voltage (ADC6)
+ *  19    PB0   Opamp power
+ *  20    PA7   e-switch  (PCINT7)
+ *      ADC12   thermal sensor
+ *
+ * Main LED power uses one pin to turn the Opamp on/off,
+ * and one pin to control Opamp power level.
+ * All brightness control uses the power level pin, with 4 kHz 10-bit PWM.
+ * The on/off pin is only used to turn the main LED on and off,
+ * not to change brightness.
+ */
+
+#ifdef ATTINY
+#undef ATTINY
+#endif
+#define ATTINY 1634
+#include <avr/io.h>
+
+#define PWM_CHANNELS 1
+#define PWM_BITS 10  // 0 to 1023 at 4 kHz, not 0 to 255 at 16 kHz
+#define PWM_TOP 1023
+
+#define SWITCH_PIN   PA7    // pin 20
+#define SWITCH_PCINT PCINT7 // pin 20 pin change interrupt
+#define SWITCH_PCIE  PCIE0  // PCIE0 is for PCINT[7:0]
+#define SWITCH_PCMSK PCMSK0 // PCMSK0 is for PCINT[7:0]
+#define SWITCH_PORT  PINA   // PINA or PINB or PINC
+
+#define PWM1_PIN PB3        // pin 16, Opamp reference
+#define PWM1_LVL OCR1A      // OCR1A is the output compare register for PB3
+
+#define LED_ENABLE_PIN  PB0    // pin 19, Opamp power
+#define LED_ENABLE_PORT PORTB  // control port for PB0
+
+#define LED_ENABLE2_PIN  PC0    // pin 15, boost PMIC enable
+#define LED_ENABLE2_PORT PORTC  // control port for PC0
+
+
+#define USE_VOLTAGE_DIVIDER  // use a dedicated pin, not VCC, because VCC input is flattened
+#define VOLTAGE_PIN PB1      // Pin 18 / PB1 / ADC6
+// pin to ADC mappings are in DS table 19-4
+#define VOLTAGE_ADC      ADC6D  // digital input disable pin for PB1
+// DIDR0/DIDR1 mappings are in DS section 19.13.5, 19.13.6
+#define VOLTAGE_ADC_DIDR DIDR1  // DIDR channel for ADC6D
+// DS tables 19-3, 19-4
+// Bit   7     6     5      4     3    2    1    0
+//     REFS1 REFS0 REFEN ADC0EN MUX3 MUX2 MUX1 MUX0
+// MUX[3:0] = 0, 1, 1, 0 for ADC6 / PB1
+// divided by ...
+// REFS[1:0] = 1, 0 for internal 1.1V reference
+// other bits reserved
+#define ADMUX_VOLTAGE_DIVIDER 0b10000110
+#define ADC_PRSCL   0x07    // clk/128
+
+// Raw ADC readings at 4.4V and 2.2V
+// calibrate the voltage readout here
+// estimated / calculated values are:
+//   (voltage - D1) * (R2/(R2+R1) * 256 / 1.1)
+// D1, R1, R2 = 0, 330, 100
+#ifndef ADC_44
+//#define ADC_44 981  // raw value at 4.40V
+#define ADC_44 967  // manually tweaked so 4.16V will blink out 4.2
+#endif
+#ifndef ADC_22
+//#define ADC_22 489  // raw value at 2.20V
+#define ADC_22 482  // manually tweaked so 4.16V will blink out 4.2
+#endif
+
+#define TEMP_CHANNEL 0b00001111
+
+// this light has aux LEDs under the optic
+#define AUXLED_R_PIN    PA5    // pin 2
+#define AUXLED_G_PIN    PA4    // pin 3
+#define AUXLED_B_PIN    PA3    // pin 4
+#define AUXLED_RGB_PORT PORTA  // PORTA or PORTB or PORTC
+#define AUXLED_RGB_DDR  DDRA   // DDRA or DDRB or DDRC
+#define AUXLED_RGB_PUE  PUEA   // PUEA or PUEB or PUEC
+
+// with so many pins, doing this all with #ifdefs gets awkward...
+// ... so just hardcode it in each hwdef file instead
+inline void hwdef_setup() {
+  // enable output ports
+  // boost PMIC on/off
+  DDRC = (1 << LED_ENABLE2_PIN);
+  // Opamp level and Opamp on/off
+  DDRB = (1 << PWM1_PIN)
+       | (1 << LED_ENABLE_PIN);
+  // aux R/G/B
+  DDRA = (1 << AUXLED_R_PIN)
+       | (1 << AUXLED_G_PIN)
+       | (1 << AUXLED_B_PIN)
+       ;
+
+  // configure PWM
+  // Setup PWM. F_pwm = F_clkio / 2 / N / TOP, where N = prescale factor, TOP = top of counter
+  // pre-scale for timer: N = 1
+  // WGM1[3:0]: 0,0,1,1: PWM, Phase Correct, 10-bit (DS table 12-5)
+  // CS1[2:0]:    0,0,1: clk/1 (No prescaling) (DS table 12-6)
+  // COM1A[1:0]:    1,0: PWM OC1A in the normal direction (DS table 12-4)
+  // COM1B[1:0]:    0,0: PWM OC1B disabled (DS table 12-4)
+  TCCR1A  = (1<<WGM11)  | (1<<WGM10)   // 10-bit (TOP=0x03FF) (DS table 12-5)
+          | (1<<COM1A1) | (0<<COM1A0)  // PWM 1A in normal direction (DS table 12-4)
+          | (0<<COM1B1) | (0<<COM1B0)  // PWM 1B in normal direction (DS table 12-4)
+          ;
+  TCCR1B  = (0<<CS12)   | (0<<CS11) | (1<<CS10)  // clk/1 (no prescaling) (DS table 12-6)
+          | (0<<WGM13)  | (0<<WGM12)  // phase-correct PWM (DS table 12-5)
+          ;
+
+  // set up e-switch
+  PUEA = (1 << SWITCH_PIN);  // pull-up for e-switch
+  SWITCH_PCMSK = (1 << SWITCH_PCINT);  // enable pin change interrupt
+}
+
+#define LAYOUT_DEFINED
+
+#endif
diff --git a/hwdef-Noctigon_K1.h b/hwdef-Noctigon_K1.h
index 031bec0..8c8a4db 100644
--- a/hwdef-Noctigon_K1.h
+++ b/hwdef-Noctigon_K1.h
@@ -71,7 +71,7 @@
 // REFS[1:0] = 1, 0 for internal 1.1V reference
 // other bits reserved
 #define ADMUX_VOLTAGE_DIVIDER 0b10000110
-#define ADC_PRSCL   0x06    // clk/64
+#define ADC_PRSCL   0x07    // clk/128
 
 // Raw ADC readings at 4.4V and 2.2V
 // calibrate the voltage readout here
diff --git a/hwdef-Noctigon_KR4.h b/hwdef-Noctigon_KR4.h
new file mode 100644
index 0000000..4eec585
--- /dev/null
+++ b/hwdef-Noctigon_KR4.h
@@ -0,0 +1,147 @@
+#ifndef HWDEF_NOCTIGON_KR4_H
+#define HWDEF_NOCTIGON_KR4_H
+
+/* Noctigon KR4 driver layout (attiny1634)
+ *
+ * Pin / Name / Function
+ *   1    PA6   FET PWM (direct drive) (PWM1B)
+ *   2    PA5   R: red aux LED (PWM0B)
+ *   3    PA4   G: green aux LED
+ *   4    PA3   B: blue aux LED
+ *   5    PA2   (none)
+ *   6    PA1   (none)
+ *   7    PA0   (none)
+ *   8    GND   GND
+ *   9    VCC   VCC
+ *  10    PC5   (none)
+ *  11    PC4   (none)
+ *  12    PC3   RESET
+ *  13    PC2   (none)
+ *  14    PC1   SCK
+ *  15    PC0   (none) PWM0A
+ *  16    PB3   main LED PWM (linear) (PWM1A)
+ *  17    PB2   MISO / e-switch (PCINT10)
+ *  18    PB1   MOSI / battery voltage (ADC6)
+ *  19    PB0   Opamp power
+ *  20    PA7   (none)
+ *      ADC12   thermal sensor
+ *
+ * Main LED power uses one pin to turn the Opamp on/off,
+ * and one pin to control Opamp power level.
+ * Main brightness control uses the power level pin, with 4 kHz 10-bit PWM.
+ * The on/off pin is only used to turn the main LED on and off,
+ * not to change brightness.
+ * Some models also have a direct-drive FET for turbo.
+ */
+
+#ifdef ATTINY
+#undef ATTINY
+#endif
+#define ATTINY 1634
+#include <avr/io.h>
+
+#define PWM_CHANNELS 2
+#define PWM_BITS 10  // 0 to 1023 at 4 kHz, not 0 to 255 at 16 kHz
+#define PWM_TOP 1023
+
+#define SWITCH_PIN   PB2     // pin 17
+#define SWITCH_PCINT PCINT10 // pin 17 pin change interrupt
+#define SWITCH_PCIE  PCIE1   // PCIE1 is for PCINT[11:8]
+#define SWITCH_PCMSK PCMSK1  // PCMSK1 is for PCINT[11:8]
+#define SWITCH_PORT  PINB    // PINA or PINB or PINC
+#define PCINT_vect   PCINT1_vect  // ISR for PCINT[11:8]
+
+// the button tends to short out the voltage divider,
+// so ignore voltage while the button is being held
+//#define NO_LVP_WHILE_BUTTON_PRESSED
+
+
+#define PWM1_PIN PB3        // pin 16, Opamp reference
+#define PWM1_LVL OCR1A      // OCR1A is the output compare register for PB3
+
+#define PWM2_PIN PA6        // pin 1, DD FET PWM
+#define PWM2_LVL OCR1B      // OCR1B is the output compare register for PA6
+
+#define LED_ENABLE_PIN  PB0    // pin 19, Opamp power
+#define LED_ENABLE_PORT PORTB  // control port for PB0
+
+
+#define USE_VOLTAGE_DIVIDER  // use a dedicated pin, not VCC, because VCC input is flattened
+#define VOLTAGE_PIN PB1      // Pin 18 / PB1 / ADC6
+// pin to ADC mappings are in DS table 19-4
+#define VOLTAGE_ADC      ADC6D  // digital input disable pin for PB1
+// DIDR0/DIDR1 mappings are in DS section 19.13.5, 19.13.6
+#define VOLTAGE_ADC_DIDR DIDR1  // DIDR channel for ADC6D
+// DS tables 19-3, 19-4
+// Bit   7     6     5      4     3    2    1    0
+//     REFS1 REFS0 REFEN ADC0EN MUX3 MUX2 MUX1 MUX0
+// MUX[3:0] = 0, 1, 1, 0 for ADC6 / PB1
+// divided by ...
+// REFS[1:0] = 1, 0 for internal 1.1V reference
+// other bits reserved
+#define ADMUX_VOLTAGE_DIVIDER 0b10000110
+#define ADC_PRSCL   0x07    // clk/128
+
+// TODO: calibrate this
+// Raw ADC readings at 4.4V and 2.2V
+// calibrate the voltage readout here
+// estimated / calculated values are:
+//   (voltage - D1) * (R2/(R2+R1) * 256 / 1.1)
+// D1, R1, R2 = 0, 330, 100
+#ifndef ADC_44
+//#define ADC_44 981  // raw value at 4.40V
+#define ADC_44 967  // manually tweaked so 4.16V will blink out 4.2
+#endif
+#ifndef ADC_22
+//#define ADC_22 489  // raw value at 2.20V
+#define ADC_22 482  // manually tweaked so 4.16V will blink out 4.2
+#endif
+
+#define TEMP_CHANNEL 0b00001111
+
+// this light has aux LEDs under the optic
+#define AUXLED_R_PIN    PA5    // pin 2
+#define AUXLED_G_PIN    PA4    // pin 3
+#define AUXLED_B_PIN    PA3    // pin 4
+#define AUXLED_RGB_PORT PORTA  // PORTA or PORTB or PORTC
+#define AUXLED_RGB_DDR  DDRA   // DDRA or DDRB or DDRC
+#define AUXLED_RGB_PUE  PUEA   // PUEA or PUEB or PUEC
+
+// with so many pins, doing this all with #ifdefs gets awkward...
+// ... so just hardcode it in each hwdef file instead
+inline void hwdef_setup() {
+  // enable output ports
+  // Opamp level and Opamp on/off
+  DDRB = (1 << PWM1_PIN)
+       | (1 << LED_ENABLE_PIN);
+  // DD FET PWM, aux R/G/B
+  DDRA = (1 << PWM2_PIN)
+       | (1 << AUXLED_R_PIN)
+       | (1 << AUXLED_G_PIN)
+       | (1 << AUXLED_B_PIN)
+       ;
+
+  // configure PWM
+  // Setup PWM. F_pwm = F_clkio / 2 / N / TOP, where N = prescale factor, TOP = top of counter
+  // pre-scale for timer: N = 1
+  // WGM1[3:0]: 0,0,1,1: PWM, Phase Correct, 10-bit (DS table 12-5)
+  // CS1[2:0]:    0,0,1: clk/1 (No prescaling) (DS table 12-6)
+  // COM1A[1:0]:    1,0: PWM OC1A in the normal direction (DS table 12-4)
+  // COM1B[1:0]:    1,0: PWM OC1B in the normal direction (DS table 12-4)
+  TCCR1A  = (1<<WGM11)  | (1<<WGM10)   // 10-bit (TOP=0x03FF) (DS table 12-5)
+          | (1<<COM1A1) | (0<<COM1A0)  // PWM 1A in normal direction (DS table 12-4)
+          | (1<<COM1B1) | (0<<COM1B0)  // PWM 1B in normal direction (DS table 12-4)
+          ;
+  TCCR1B  = (0<<CS12)   | (0<<CS11) | (1<<CS10)  // clk/1 (no prescaling) (DS table 12-6)
+          | (0<<WGM13)  | (0<<WGM12)  // phase-correct PWM (DS table 12-5)
+          ;
+
+  // set up e-switch
+  //PORTB = (1 << SWITCH_PIN);  // TODO: configure PORTA / PORTB / PORTC?
+  PUEB = (1 << SWITCH_PIN);  // pull-up for e-switch
+  SWITCH_PCMSK = (1 << SWITCH_PCINT);  // enable pin change interrupt
+}
+
+#define LAYOUT_DEFINED
+
+#endif
diff --git a/spaghetti-monster/anduril/anduril.c b/spaghetti-monster/anduril/anduril.c
index 0758327..8a9584e 100644
--- a/spaghetti-monster/anduril/anduril.c
+++ b/spaghetti-monster/anduril/anduril.c
@@ -355,6 +355,9 @@ const PROGMEM uint8_t rgb_led_colors[] = {
 #ifndef RGB_LED_LOCKOUT_DEFAULT
 #define RGB_LED_LOCKOUT_DEFAULT 0x37  // blinking, rainbow
 #endif
+#ifndef RGB_RAINBOW_SPEED
+#define RGB_RAINBOW_SPEED 0x0f  // change color every 16 frames
+#endif
 uint8_t rgb_led_off_mode = RGB_LED_OFF_DEFAULT;
 uint8_t rgb_led_lockout_mode = RGB_LED_LOCKOUT_DEFAULT;
 #endif
@@ -2400,7 +2403,7 @@ void rgb_led_update(uint8_t mode, uint8_t arg) {
     }
     else if (color == 7) {  // rainbow
         uint8_t speed = 0x03;  // awake speed
-        if (go_to_standby) speed = 0x0f;  // asleep speed
+        if (go_to_standby) speed = RGB_RAINBOW_SPEED;  // asleep speed
         if (0 == (arg & speed)) {
             rainbow = (rainbow + 1) % 6;
         }
diff --git a/spaghetti-monster/anduril/cfg-noctigon-k1-12v.h b/spaghetti-monster/anduril/cfg-noctigon-k1-12v.h
new file mode 100644
index 0000000..617801f
--- /dev/null
+++ b/spaghetti-monster/anduril/cfg-noctigon-k1-12v.h
@@ -0,0 +1,65 @@
+// Noctigon K1 12V config options for Anduril
+#include "hwdef-Noctigon_K1-12V.h"
+// ATTINY: 1634
+
+// this light can safely run a bit hotter than most
+#undef DEFAULT_THERM_CEIL
+#define DEFAULT_THERM_CEIL 55
+
+// this light has three aux LED channels: R, G, B
+#define USE_AUX_RGB_LEDS
+#define USE_AUX_RGB_LEDS_WHILE_ON
+#define USE_INDICATOR_LED_WHILE_RAMPING
+#define RGB_LED_OFF_DEFAULT 0x18  // low, voltage
+#define RGB_LED_LOCKOUT_DEFAULT 0x37  // blinking, rainbow
+
+// enable blinking aux LEDs
+#define TICK_DURING_STANDBY
+#define STANDBY_TICK_SPEED 3  // every 0.128 s
+
+
+// level_calc.py cube 1 150 7135 0 4 1300
+// (with max_pwm set to 1023)
+// (level 0 is usable on this light)
+#define RAMP_LENGTH 150
+#define PWM1_LEVELS 0,0,1,1,2,2,3,3,4,5,5,6,7,8,9,10,11,12,13,14,15,16,17,19,20,22,23,25,26,28,30,31,33,35,37,39,42,44,46,48,51,53,56,59,61,64,67,70,73,76,80,83,86,90,94,97,101,105,109,113,117,122,126,130,135,140,144,149,154,159,165,170,175,181,187,193,198,204,211,217,223,230,236,243,250,257,264,271,279,286,294,302,310,318,326,334,343,351,360,369,378,387,397,406,416,426,436,446,456,466,477,488,499,510,521,532,544,555,567,579,591,604,616,629,642,655,668,682,695,709,723,737,751,766,780,795,810,825,841,856,872,888,904,921,937,954,971,988,1005,1023
+#define MAX_1x7135 50
+
+// the entire ramp is regulated; don't blink halfway up
+#ifdef BLINK_AT_RAMP_MIDDLE
+#undef BLINK_AT_RAMP_MIDDLE
+#endif
+
+// don't slow down at low levels; this isn't that sort of light
+// (it needs to stay at full speed for the 10-bit PWM to work)
+#ifdef USE_DYNAMIC_UNDERCLOCKING
+#undef USE_DYNAMIC_UNDERCLOCKING
+#endif
+
+#define RAMP_SMOOTH_FLOOR 1
+#define RAMP_SMOOTH_CEIL 130
+// 10, 30, [50], 70, 90, 110, 130
+#define RAMP_DISCRETE_FLOOR 10
+#define RAMP_DISCRETE_CEIL RAMP_SMOOTH_CEIL
+#define RAMP_DISCRETE_STEPS 7
+
+#define MUGGLE_FLOOR RAMP_DISCRETE_FLOOR
+#define MUGGLE_CEILING 70
+
+// make candle mode wobble more
+#define CANDLE_AMPLITUDE 32
+
+// stop panicking at ~70% power or ~600 lm
+#define THERM_FASTER_LEVEL 130
+
+#define THERM_RESPONSE_MAGNITUDE 32  // smaller adjustments, this host changes temperature slowly
+#define THERM_NEXT_WARNING_THRESHOLD 32  // more error tolerance before adjusting
+
+// easier access to thermal config mode, for Noctigon
+#define USE_TENCLICK_THERMAL_CONFIG
+
+// slow down party strobe; this driver can't pulse for 1ms or less
+#define PARTY_STROBE_ONTIME 4
+
+#define THERM_CAL_OFFSET 5
+
diff --git a/spaghetti-monster/anduril/cfg-noctigon-k1.h b/spaghetti-monster/anduril/cfg-noctigon-k1.h
index 59eb32e..4f2c2cc 100644
--- a/spaghetti-monster/anduril/cfg-noctigon-k1.h
+++ b/spaghetti-monster/anduril/cfg-noctigon-k1.h
@@ -21,6 +21,7 @@
 
 // ../../bin/level_calc.py cube 1 150 7135 1 4 1300
 // (with max_pwm set to 1023)
+// (level 0 flickers and isn't relevant on a thrower, so it's omitted)
 #define RAMP_LENGTH 150
 #define PWM1_LEVELS 1,1,2,2,3,3,4,4,5,6,6,7,8,9,10,11,12,13,14,15,16,17,18,20,21,23,24,26,27,29,31,32,34,36,38,40,43,45,47,49,52,54,57,60,62,65,68,71,74,77,81,84,87,91,95,98,102,106,110,114,118,122,127,131,136,141,145,150,155,160,166,171,176,182,188,193,199,205,211,218,224,231,237,244,251,258,265,272,280,287,295,303,310,319,327,335,344,352,361,370,379,388,397,407,416,426,436,446,457,467,477,488,499,510,521,533,544,556,568,580,592,604,617,629,642,655,668,682,695,709,723,737,751,766,781,795,810,826,841,857,872,888,904,921,937,954,971,988,1005,1023
 #define MAX_1x7135 50
@@ -46,9 +47,14 @@
 #define MUGGLE_FLOOR RAMP_DISCRETE_FLOOR
 #define MUGGLE_CEILING 70
 
+// make candle mode wobble more
+#define CANDLE_AMPLITUDE 32
+
 // stop panicking at ~70% power or ~600 lm
 #define THERM_FASTER_LEVEL 130
-#define THERM_CAL_OFFSET 5
+
+#define THERM_RESPONSE_MAGNITUDE 32  // smaller adjustments, this host changes temperature slowly
+#define THERM_NEXT_WARNING_THRESHOLD 32  // more error tolerance before adjusting
 
 // easier access to thermal config mode, for Noctigon
 #define USE_TENCLICK_THERMAL_CONFIG
@@ -56,3 +62,5 @@
 // slow down party strobe; this driver can't pulse for 1ms or less
 #define PARTY_STROBE_ONTIME 2
 
+#define THERM_CAL_OFFSET 5
+
diff --git a/spaghetti-monster/anduril/cfg-noctigon-kr4-219.h b/spaghetti-monster/anduril/cfg-noctigon-kr4-219.h
new file mode 100644
index 0000000..0cfccf2
--- /dev/null
+++ b/spaghetti-monster/anduril/cfg-noctigon-kr4-219.h
@@ -0,0 +1,11 @@
+// Noctigon KR4 (75% FET) config options for Anduril
+#include "cfg-noctigon-kr4.h"
+// ATTINY: 1634
+
+// don't turn off first channel at turbo level
+#undef PWM1_LEVELS
+#define PWM1_LEVELS 0,0,1,1,2,2,3,3,4,4,5,6,7,8,9,10,11,13,14,15,17,19,20,22,24,26,28,30,33,35,38,40,43,46,49,52,55,59,62,66,70,74,78,82,86,91,96,100,105,111,116,121,127,133,139,145,151,158,165,172,179,186,193,201,209,217,225,234,243,251,261,270,280,289,299,310,320,331,342,353,364,376,388,400,412,425,438,451,464,478,492,506,521,536,551,566,582,597,614,630,647,664,681,699,717,735,754,772,792,811,831,851,871,892,913,935,956,978,1001,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023
+// 75% FET power
+#undef PWM2_LEVELS
+#define PWM2_LEVELS 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,17,39,60,82,104,126,149,172,195,219,243,268,293,318,343,369,396,422,449,476,504,531,560,588,617,646,676,706,737,768
+
diff --git a/spaghetti-monster/anduril/cfg-noctigon-kr4-nofet.h b/spaghetti-monster/anduril/cfg-noctigon-kr4-nofet.h
new file mode 100644
index 0000000..19cbc23
--- /dev/null
+++ b/spaghetti-monster/anduril/cfg-noctigon-kr4-nofet.h
@@ -0,0 +1,47 @@
+// Noctigon KR4 (fetless) config options for Anduril
+#include "cfg-noctigon-kr4.h"
+// ATTINY: 1634
+
+// brightness w/ SST-20 4000K LEDs:
+// 0/1023: 0.35 lm
+// 1/1023: 2.56 lm
+// max regulated: 1740 lm
+// level_calc.py 3.0 1 150 7135 0 5 1740
+#undef PWM_CHANNELS
+#define PWM_CHANNELS 1
+#define RAMP_LENGTH 150
+#undef PWM1_LEVELS
+#define PWM1_LEVELS 0,0,1,1,2,2,3,3,4,4,5,5,6,7,8,9,10,11,12,13,15,16,17,18,20,21,23,24,26,27,29,31,33,35,37,39,41,43,45,48,50,53,55,58,61,63,66,69,72,75,79,82,85,89,92,96,100,104,108,112,116,120,125,129,134,138,143,148,153,158,163,169,174,180,185,191,197,203,209,215,222,228,235,242,248,255,263,270,277,285,292,300,308,316,324,333,341,350,359,368,377,386,395,405,414,424,434,444,454,465,475,486,497,508,519,531,542,554,566,578,590,603,615,628,641,654,667,680,694,708,722,736,750,765,779,794,809,825,840,856,872,888,904,920,937,954,971,988,1005,1023
+#undef PWM2_LEVELS
+#undef DEFAULT_LEVEL
+#define DEFAULT_LEVEL 50
+#undef MAX_1x7135
+#define MAX_1x7135 150
+
+#undef RAMP_SMOOTH_FLOOR
+#undef RAMP_SMOOTH_CEIL
+#undef RAMP_DISCRETE_FLOOR
+#undef RAMP_DISCRETE_CEIL
+#undef RAMP_DISCRETE_STEPS
+
+#define RAMP_SMOOTH_FLOOR 3  // level 1 is unreliable
+#define RAMP_SMOOTH_CEIL 130
+// 10, 30, [50], 70, 90, 110, 130  (plus [150] on turbo)
+#define RAMP_DISCRETE_FLOOR 10
+#define RAMP_DISCRETE_CEIL RAMP_SMOOTH_CEIL
+#define RAMP_DISCRETE_STEPS 7
+
+#undef MUGGLE_FLOOR
+#undef MUGGLE_CEILING
+#define MUGGLE_FLOOR RAMP_DISCRETE_FLOOR
+#define MUGGLE_CEILING 70
+
+// make candle mode wobble more
+#define CANDLE_AMPLITUDE 32
+
+// stop panicking at ~90% power or ~1600 lm
+#undef THERM_FASTER_LEVEL
+#define THERM_FASTER_LEVEL 143
+#undef MIN_THERM_STEPDOWN
+#define MIN_THERM_STEPDOWN DEFAULT_LEVEL
+
diff --git a/spaghetti-monster/anduril/cfg-noctigon-kr4.h b/spaghetti-monster/anduril/cfg-noctigon-kr4.h
new file mode 100644
index 0000000..dc71655
--- /dev/null
+++ b/spaghetti-monster/anduril/cfg-noctigon-kr4.h
@@ -0,0 +1,58 @@
+// Noctigon KR4 config options for Anduril
+#include "hwdef-Noctigon_KR4.h"
+// ATTINY: 1634
+
+// this light has three aux LED channels: R, G, B
+#define USE_AUX_RGB_LEDS
+//#define USE_AUX_RGB_LEDS_WHILE_ON
+//#define USE_INDICATOR_LED_WHILE_RAMPING
+#define RGB_LED_OFF_DEFAULT 0x17  // low, rainbow
+#define RGB_LED_LOCKOUT_DEFAULT 0x37  // blinking, rainbow
+#define RGB_RAINBOW_SPEED 0x03  // half a second per color
+
+// enable blinking aux LEDs
+#define TICK_DURING_STANDBY
+#define STANDBY_TICK_SPEED 3  // every 0.128 s
+
+
+// brightness w/ SST-20 4000K LEDs:
+// 0/1023: 0.35 lm
+// 1/1023: 2.56 lm
+// max regulated: 1740 lm
+// FET: ~3700 lm
+// maxreg at 130: level_calc.py cube 2 150 7135 0 2.5 1740 FET 1 10 2565
+// maxreg at 120: level_calc.py cube 2 150 7135 0 2.5 1740 FET 1 10 3190
+#define RAMP_LENGTH 150
+#define PWM1_LEVELS 0,0,1,1,2,2,3,3,4,4,5,6,7,8,9,10,11,13,14,15,17,19,20,22,24,26,28,30,33,35,38,40,43,46,49,52,55,59,62,66,70,74,78,82,86,91,96,100,105,111,116,121,127,133,139,145,151,158,165,172,179,186,193,201,209,217,225,234,243,251,261,270,280,289,299,310,320,331,342,353,364,376,388,400,412,425,438,451,464,478,492,506,521,536,551,566,582,597,614,630,647,664,681,699,717,735,754,772,792,811,831,851,871,892,913,935,956,978,1001,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,0
+#define PWM2_LEVELS 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,22,51,79,109,138,168,198,229,260,292,324,357,390,423,457,492,527,562,598,634,671,708,746,784,822,861,901,941,982,1023
+#define DEFAULT_LEVEL 46
+#define MAX_1x7135 120
+#define HALFSPEED_LEVEL 10
+#define QUARTERSPEED_LEVEL 2
+
+#define RAMP_SMOOTH_FLOOR 3  // level 1 is unreliable
+#define RAMP_SMOOTH_CEIL 120
+// 10, 28, [46], 65, 83, 101, [120]
+#define RAMP_DISCRETE_FLOOR 10
+#define RAMP_DISCRETE_CEIL RAMP_SMOOTH_CEIL
+#define RAMP_DISCRETE_STEPS 7
+
+#define MUGGLE_FLOOR RAMP_DISCRETE_FLOOR
+#define MUGGLE_CEILING 65
+
+// stop panicking at ~25% power or ~1000 lm
+#define THERM_FASTER_LEVEL 100
+#define MIN_THERM_STEPDOWN DEFAULT_LEVEL
+#define THERM_NEXT_WARNING_THRESHOLD 16  // accumulate less error before adjusting
+#define THERM_RESPONSE_MAGNITUDE 128  // bigger adjustments
+
+// easier access to thermal config mode, for Noctigon
+#define USE_TENCLICK_THERMAL_CONFIG
+
+// slow down party strobe; this driver can't pulse for 1ms or less
+#define PARTY_STROBE_ONTIME 2
+
+#define THERM_CAL_OFFSET 5
+
+// can't reset the normal way because power is connected before the button
+#define USE_SOFT_FACTORY_RESET
diff --git a/spaghetti-monster/fsm-adc.c b/spaghetti-monster/fsm-adc.c
index eef3baf..45a4297 100644
--- a/spaghetti-monster/fsm-adc.c
+++ b/spaghetti-monster/fsm-adc.c
@@ -111,7 +111,7 @@ inline void ADC_off() {
 
 #ifdef USE_VOLTAGE_DIVIDER
 static inline uint8_t calc_voltage_divider(uint16_t value) {
-    // use fixed-point to get sufficient precision
+    // use 9.7 fixed-point to get sufficient precision
     uint16_t adc_per_volt = ((ADC_44<<5) - (ADC_22<<5)) / (44-22);
     // shift incoming value into a matching position
     uint8_t result = ((value>>1) / adc_per_volt) + VOLTAGE_FUDGE_FACTOR;
@@ -231,6 +231,12 @@ static inline void ADC_voltage_handler() {
     static uint8_t lvp_timer = 0;
     #define LVP_TIMER_START (VOLTAGE_WARNING_SECONDS*ADC_CYCLES_PER_SECOND)  // N seconds between LVP warnings
 
+    #ifdef NO_LVP_WHILE_BUTTON_PRESSED
+    // don't run if button is currently being held
+    // (because the button causes a reading of zero volts)
+    if (button_last_state) return;
+    #endif
+
     uint16_t measurement;
 
     // latest ADC value
@@ -280,21 +286,21 @@ static inline void ADC_voltage_handler() {
 static inline void ADC_temperature_handler() {
     // coarse adjustment
     #ifndef THERM_LOOKAHEAD
-    #define THERM_LOOKAHEAD 4  // can be tweaked per build target
+    #define THERM_LOOKAHEAD 4
     #endif
     // reduce frequency of minor warnings
     #ifndef THERM_NEXT_WARNING_THRESHOLD
     #define THERM_NEXT_WARNING_THRESHOLD 24
     #endif
     // fine-grained adjustment
-    // how proportional should the adjustments be?  (not used yet)
+    // how proportional should the adjustments be?
     #ifndef THERM_RESPONSE_MAGNITUDE
-    #define THERM_RESPONSE_MAGNITUDE 128
+    #define THERM_RESPONSE_MAGNITUDE 64
     #endif
     // acceptable temperature window size in C
     #define THERM_WINDOW_SIZE 2
 
-    // TODO: make this configurable per build target?
+    // TODO? make this configurable per build target?
     //       (shorter time for hosts with a lower power-to-mass ratio)
     //       (because then it'll have smaller responses)
     #define NUM_TEMP_HISTORY_STEPS 8  // don't change; it'll break stuff
@@ -356,7 +362,7 @@ static inline void ADC_temperature_handler() {
     // (but a diff of 1 C should only send a warning of magnitude 1)
     // (this also makes it only respond to small errors at the time the error
     // happened, not after the temperature has stabilized)
-    for(uint8_t foo=0; foo<5; foo++) {
+    for(uint8_t foo=0; foo<3; foo++) {
         if (offset > 0) {
             offset --;
         } else if (offset < 0) {
@@ -365,17 +371,23 @@ static inline void ADC_temperature_handler() {
     }
 
     // Too hot?
-    // (if it's too hot and still getting warmer...)
-    if ((offset > 0) && (diff > 0)) {
+    // (if it's too hot and not getting cooler...)
+    if ((offset > 0) && (diff > -1)) {
         // accumulated error isn't big enough yet to send a warning
         if (warning_threshold > 0) {
             warning_threshold -= offset;
         } else {  // error is big enough; send a warning
-            warning_threshold = THERM_NEXT_WARNING_THRESHOLD - offset;
-
             // how far above the ceiling?
-            //int16_t howmuch = offset * THERM_RESPONSE_MAGNITUDE / 128;
-            int16_t howmuch = offset;
+            // original method works, but is too slow on some small hosts:
+            // (and typically has a minimum response magnitude of 2 instead of 1)
+            //   int16_t howmuch = offset;
+            // ... so increase the amount, except for small values
+            // (for example, 1:1, 2:1, 3:3, 4:5, 6:9, 8:13, 10:17, 40:77)
+            // ... and let us tune the response per build target if desired
+            int16_t howmuch = (offset + offset - 3) * THERM_RESPONSE_MAGNITUDE / 128;
+            if (howmuch < 1) howmuch = 1;
+            warning_threshold = THERM_NEXT_WARNING_THRESHOLD - (uint8_t)howmuch;
+
             // send a warning
             emit(EV_temperature_high, howmuch);
         }
diff --git a/spaghetti-monster/fsm-eeprom.c b/spaghetti-monster/fsm-eeprom.c
index 277e2b2..77352cf 100644
--- a/spaghetti-monster/fsm-eeprom.c
+++ b/spaghetti-monster/fsm-eeprom.c
@@ -30,6 +30,10 @@ uint8_t eeprom[EEPROM_BYTES];
 #endif
 
 uint8_t load_eeprom() {
+    #ifdef LED_ENABLE_PIN
+    delay_4ms(2);  // wait for power to stabilize
+    #endif
+
     cli();
     // check if eeprom has been initialized; abort if it hasn't
     uint8_t marker = eeprom_read_byte((uint8_t *)EEP_START);
@@ -44,6 +48,10 @@ uint8_t load_eeprom() {
 }
 
 void save_eeprom() {
+    #ifdef LED_ENABLE_PIN
+    delay_4ms(2);  // wait for power to stabilize
+    #endif
+
     cli();
 
     // save the actual data
@@ -62,6 +70,10 @@ uint8_t eeprom_wl[EEPROM_WL_BYTES];
 EEP_OFFSET_T eep_wl_prev_offset;
 
 uint8_t load_eeprom_wl() {
+    #ifdef LED_ENABLE_PIN
+    delay_4ms(2);  // wait for power to stabilize
+    #endif
+
     cli();
     // check if eeprom has been initialized; abort if it hasn't
     uint8_t found = 0;
@@ -87,6 +99,10 @@ uint8_t load_eeprom_wl() {
 }
 
 void save_eeprom_wl() {
+    #ifdef LED_ENABLE_PIN
+    delay_4ms(2);  // wait for power to stabilize
+    #endif
+
     cli();
     // erase old state
     EEP_OFFSET_T offset = eep_wl_prev_offset;
diff --git a/spaghetti-monster/fsm-misc.c b/spaghetti-monster/fsm-misc.c
index 152f047..82be745 100644
--- a/spaghetti-monster/fsm-misc.c
+++ b/spaghetti-monster/fsm-misc.c
@@ -231,18 +231,20 @@ uint8_t triangle_wave(uint8_t phase) {
 
 #ifdef USE_REBOOT
 void reboot() {
-    #if 1  // WDT method, safer but larger
+    // put the WDT in hard reset mode, then trigger it
     cli();
-    WDTCR = 0xD8 | WDTO_15MS;
+    #if (ATTINY == 25) || (ATTINY == 45) || (ATTINY == 85)
+        WDTCR = 0xD8 | WDTO_15MS;
+    #elif (ATTINY == 1634)
+        // allow protected configuration changes for next 4 clock cycles
+        CCP = 0xD8;  // magic number
+        // reset (WDIF + WDE), no WDIE, fastest (16ms) timing (0000)
+        // (DS section 8.5.2 and table 8-4)
+        WDTCSR = 0b10001000;
+    #endif
     sei();
     wdt_reset();
     while (1) {}
-    #else  // raw assembly method, doesn't reset registers or anything
-    __asm__ __volatile__ (
-            "cli" "\n\t"
-            "rjmp 0x00" "\n\t"
-            );
-    #endif
 }
 #endif
 
diff --git a/spaghetti-monster/fsm-pcint.c b/spaghetti-monster/fsm-pcint.c
index 1ba1c15..d362633 100644
--- a/spaghetti-monster/fsm-pcint.c
+++ b/spaghetti-monster/fsm-pcint.c
@@ -66,7 +66,11 @@ inline void PCINT_off() {
 //void button_change_interrupt() {
 #if (ATTINY == 25) || (ATTINY == 45) || (ATTINY == 85) || (ATTINY == 1634)
 //EMPTY_INTERRUPT(PCINT0_vect);
+#ifdef PCINT_vect
+ISR(PCINT_vect) {
+#else
 ISR(PCINT0_vect) {
+#endif
     irq_pcint = 1;
 }
 #else
diff --git a/spaghetti-monster/fsm-ramping.c b/spaghetti-monster/fsm-ramping.c
index 20500cc..bae601e 100644
--- a/spaghetti-monster/fsm-ramping.c
+++ b/spaghetti-monster/fsm-ramping.c
@@ -72,6 +72,9 @@ void set_level(uint8_t level) {
         #ifdef LED_ENABLE_PIN
         LED_ENABLE_PORT &= ~(1 << LED_ENABLE_PIN);
         #endif
+        #ifdef LED_ENABLE2_PIN
+        LED_ENABLE2_PORT &= ~(1 << LED_ENABLE2_PIN);
+        #endif
     } else {
         level --;
 
@@ -79,6 +82,9 @@ void set_level(uint8_t level) {
         #ifdef LED_ENABLE_PIN
         LED_ENABLE_PORT |= (1 << LED_ENABLE_PIN);
         #endif
+        #ifdef LED_ENABLE2_PIN
+        LED_ENABLE2_PORT |= (1 << LED_ENABLE2_PIN);
+        #endif
 
         #ifdef USE_TINT_RAMPING
         #ifndef TINT_RAMPING_CORRECTION