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hwdef-Noctigon_K1.h
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hwdef-Noctigon_K1.h
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#ifndef HWDEF_NOCTIGON_K1_H
#define HWDEF_NOCTIGON_K1_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 (none) PWM0A
* 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 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
// 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);
// 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
//PORTA = (1 << SWITCH_PIN); // TODO: configure PORTA / PORTB / PORTC?
PUEA = (1 << SWITCH_PIN); // pull-up for e-switch
SWITCH_PCMSK = (1 << SWITCH_PCINT); // enable pin change interrupt
}
#define LAYOUT_DEFINED
#endif