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#ifndef HWDEF_NOCTIGON_KR4_H
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#define HWDEF_NOCTIGON_KR4_H
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/* Noctigon KR4 driver layout (attiny1634)
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* Pin / Name / Function
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* 1 PA6 FET PWM (direct drive) (PWM1B)
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* 2 PA5 R: red aux LED (PWM0B)
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* 3 PA4 G: green aux LED
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* 4 PA3 B: blue aux LED
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* 16 PB3 main LED PWM (linear) (PWM1A)
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* 17 PB2 MISO / e-switch (PCINT10)
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* 18 PB1 MOSI / battery voltage (ADC6)
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* ADC12 thermal sensor
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* Main LED power uses one pin to turn the Opamp on/off,
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* and one pin to control Opamp power level.
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* Main brightness control uses the power level pin, with 4 kHz 10-bit PWM.
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* The on/off pin is only used to turn the main LED on and off,
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* not to change brightness.
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* Some models also have a direct-drive FET for turbo.
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#define PWM_CHANNELS 2
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#define PWM_BITS 10 // 0 to 1023 at 4 kHz, not 0 to 255 at 16 kHz
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#define SWITCH_PIN PB2 // pin 17
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#define SWITCH_PCINT PCINT10 // pin 17 pin change interrupt
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#define SWITCH_PCIE PCIE1 // PCIE1 is for PCINT[11:8]
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#define SWITCH_PCMSK PCMSK1 // PCMSK1 is for PCINT[11:8]
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#define SWITCH_PORT PINB // PINA or PINB or PINC
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#define PCINT_vect PCINT1_vect // ISR for PCINT[11:8]
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// the button tends to short out the voltage divider,
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// so ignore voltage while the button is being held
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//#define NO_LVP_WHILE_BUTTON_PRESSED
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#define PWM1_PIN PB3 // pin 16, Opamp reference
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#define PWM1_LVL OCR1A // OCR1A is the output compare register for PB3
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#define PWM2_PIN PA6 // pin 1, DD FET PWM
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#define PWM2_LVL OCR1B // OCR1B is the output compare register for PA6
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#define LED_ENABLE_PIN PB0 // pin 19, Opamp power
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#define LED_ENABLE_PORT PORTB // control port for PB0
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#define USE_VOLTAGE_DIVIDER // use a dedicated pin, not VCC, because VCC input is flattened
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#define VOLTAGE_PIN PB1 // Pin 18 / PB1 / ADC6
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// pin to ADC mappings are in DS table 19-4
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#define VOLTAGE_ADC ADC6D // digital input disable pin for PB1
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// DIDR0/DIDR1 mappings are in DS section 19.13.5, 19.13.6
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#define VOLTAGE_ADC_DIDR DIDR1 // DIDR channel for ADC6D
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// DS tables 19-3, 19-4
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// Bit 7 6 5 4 3 2 1 0
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// REFS1 REFS0 REFEN ADC0EN MUX3 MUX2 MUX1 MUX0
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// MUX[3:0] = 0, 1, 1, 0 for ADC6 / PB1
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// REFS[1:0] = 1, 0 for internal 1.1V reference
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// other bits reserved
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#define ADMUX_VOLTAGE_DIVIDER 0b10000110
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#define ADC_PRSCL 0x07 // clk/128
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// TODO: calibrate this
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// Raw ADC readings at 4.4V and 2.2V
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// calibrate the voltage readout here
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// estimated / calculated values are:
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// (voltage - D1) * (R2/(R2+R1) * 256 / 1.1)
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// D1, R1, R2 = 0, 330, 100
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//#define ADC_44 981 // raw value at 4.40V
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#define ADC_44 967 // manually tweaked so 4.16V will blink out 4.2
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//#define ADC_22 489 // raw value at 2.20V
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#define ADC_22 482 // manually tweaked so 4.16V will blink out 4.2
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#define TEMP_CHANNEL 0b00001111
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// this light has aux LEDs under the optic
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#define AUXLED_R_PIN PA5 // pin 2
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#define AUXLED_G_PIN PA4 // pin 3
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#define AUXLED_B_PIN PA3 // pin 4
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#define AUXLED_RGB_PORT PORTA // PORTA or PORTB or PORTC
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#define AUXLED_RGB_DDR DDRA // DDRA or DDRB or DDRC
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#define AUXLED_RGB_PUE PUEA // PUEA or PUEB or PUEC
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// with so many pins, doing this all with #ifdefs gets awkward...
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// ... so just hardcode it in each hwdef file instead
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inline void hwdef_setup() {
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// enable output ports
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// Opamp level and Opamp on/off
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DDRB = (1 << PWM1_PIN)
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| (1 << LED_ENABLE_PIN);
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// DD FET PWM, aux R/G/B
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DDRA = (1 << PWM2_PIN)
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| (1 << AUXLED_R_PIN)
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| (1 << AUXLED_G_PIN)
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| (1 << AUXLED_B_PIN)
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// Setup PWM. F_pwm = F_clkio / 2 / N / TOP, where N = prescale factor, TOP = top of counter
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// pre-scale for timer: N = 1
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// WGM1[3:0]: 0,0,1,1: PWM, Phase Correct, 10-bit (DS table 12-5)
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// CS1[2:0]: 0,0,1: clk/1 (No prescaling) (DS table 12-6)
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// COM1A[1:0]: 1,0: PWM OC1A in the normal direction (DS table 12-4)
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// COM1B[1:0]: 1,0: PWM OC1B in the normal direction (DS table 12-4)
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TCCR1A = (1<<WGM11) | (1<<WGM10) // 10-bit (TOP=0x03FF) (DS table 12-5)
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| (1<<COM1A1) | (0<<COM1A0) // PWM 1A in normal direction (DS table 12-4)
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| (1<<COM1B1) | (0<<COM1B0) // PWM 1B in normal direction (DS table 12-4)
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TCCR1B = (0<<CS12) | (0<<CS11) | (1<<CS10) // clk/1 (no prescaling) (DS table 12-6)
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| (0<<WGM13) | (0<<WGM12) // phase-correct PWM (DS table 12-5)
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//PORTB = (1 << SWITCH_PIN); // TODO: configure PORTA / PORTB / PORTC?
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PUEB = (1 << SWITCH_PIN); // pull-up for e-switch
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SWITCH_PCMSK = (1 << SWITCH_PCINT); // enable pin change interrupt
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#define LAYOUT_DEFINED
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ToyKeeper/hwdef-Noctigon_KR4.h
