~toykeeper/flashlight-firmware/fsm

// gChart's custom FET+1 driver layout

// Copyright (C) 2020-2023 (FIXME)

// SPDX-License-Identifier: GPL-3.0-or-later

#pragma once

/*

 * PB0 - PWM for FET (TCA - WO0)

 * PB1 - PWM for 7135 (TCA - WO1)

 * PB2 - Switch pin, internal pullup

 * PB3 - Aux LED with 4700 Ohm series resistor

 * Read voltage from VCC pin, has diode with ~0.4v drop

*/

#define LAYOUT_DEFINED

#ifdef ATTINY

#undef ATTINY

#endif

#define ATTINY 1616

#include <avr/io.h>

#define PWM_CHANNELS 2

#ifndef SWITCH_PIN

#define SWITCH_PIN     PIN2_bp

#define SWITCH_PORT    VPORTB.IN

#define SWITCH_ISC_REG PORTB.PIN2CTRL

#define SWITCH_VECT    PORTB_PORT_vect

#define SWITCH_INTFLG  VPORTB.INTFLAGS

#endif

// 7135 channel

#ifndef PWM1_PIN

#define PWM1_PIN PB1               //

#define PWM1_LVL TCA0.SINGLE.CMP1  // CMP1 is the output compare register for PB1

#endif

// FET channel

#ifndef PWM2_PIN

#define PWM2_PIN PB0               //

#define PWM2_LVL TCA0.SINGLE.CMP0  // CMP0 is the output compare register for PB0

#endif

// average drop across diode on this hardware

#ifndef VOLTAGE_FUDGE_FACTOR

#define VOLTAGE_FUDGE_FACTOR 8  // 4 = add 0.20V

#endif

// lighted button

#ifndef AUXLED_PIN

#define AUXLED_PIN  PIN3_bp

#define AUXLED_PORT PORTB

#endif

// with so many pins, doing this all with #ifdefs gets awkward...

// ... so just hardcode it in each hwdef file instead

inline void hwdef_setup() {

    // set up the system clock to run at 10 MHz instead of the default 3.33 MHz

    _PROTECTED_WRITE( CLKCTRL.MCLKCTRLB, CLKCTRL_PDIV_2X_gc | CLKCTRL_PEN_bm );

    //VPORTA.DIR = 0b00000010;

    VPORTB.DIR = PIN0_bm | PIN1_bm | PIN3_bm;

    //VPORTC.DIR = 0b00000000;

    // enable pullups on the input pins to reduce power

    PORTA.PIN0CTRL = PORT_PULLUPEN_bm;

    PORTA.PIN1CTRL = PORT_PULLUPEN_bm;

    PORTA.PIN2CTRL = PORT_PULLUPEN_bm;

    PORTA.PIN3CTRL = PORT_PULLUPEN_bm;

    PORTA.PIN4CTRL = PORT_PULLUPEN_bm;

    PORTA.PIN5CTRL = PORT_PULLUPEN_bm;

    PORTA.PIN6CTRL = PORT_PULLUPEN_bm;

    PORTA.PIN7CTRL = PORT_PULLUPEN_bm;

    //PORTB.PIN0CTRL = PORT_PULLUPEN_bm; // FET channel

    //PORTB.PIN1CTRL = PORT_PULLUPEN_bm; // 7135 channel

    PORTB.PIN2CTRL = PORT_PULLUPEN_bm | PORT_ISC_BOTHEDGES_gc;  // switch

    //PORTB.PIN3CTRL = PORT_PULLUPEN_bm; // Aux LED

    PORTB.PIN4CTRL = PORT_PULLUPEN_bm;

    PORTB.PIN5CTRL = PORT_PULLUPEN_bm;

    PORTC.PIN0CTRL = PORT_PULLUPEN_bm;

    PORTC.PIN1CTRL = PORT_PULLUPEN_bm;

    PORTC.PIN2CTRL = PORT_PULLUPEN_bm;

    PORTC.PIN3CTRL = PORT_PULLUPEN_bm;

    // set up the PWM

    // https://ww1.microchip.com/downloads/en/DeviceDoc/ATtiny1614-16-17-DataSheet-DS40002204A.pdf

    // PB0 is TCA0:WO0, use TCA_SINGLE_CMP0EN_bm

    // PB1 is TCA0:WO1, use TCA_SINGLE_CMP1EN_bm

    // PB2 is TCA0:WO2, use TCA_SINGLE_CMP2EN_bm

    // For Fast (Single Slope) PWM use TCA_SINGLE_WGMODE_SINGLESLOPE_gc

    // For Phase Correct (Dual Slope) PWM use TCA_SINGLE_WGMODE_DSBOTTOM_gc

    // See the manual for other pins, clocks, configs, portmux, etc

    TCA0.SINGLE.CTRLB = TCA_SINGLE_CMP0EN_bm | TCA_SINGLE_CMP1EN_bm | TCA_SINGLE_WGMODE_DSBOTTOM_gc;

    TCA0.SINGLE.PER = 255;

    TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1_gc | TCA_SINGLE_ENABLE_bm;

}