370 lines
13 KiB
C
370 lines
13 KiB
C
/** SenseoControl 2.0
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*
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* File: main.c
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* Author: Stefan Kalscheuer
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* Date: 22.04.2013
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* Comments: Main program
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* Previous project by Paul Wilhelm (2009) - http://mosfetkiller.de/?s=kaffeecontroller
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*
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* Platform: ATtiny26
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* Internal RC-oscillator 8 MHz, CKDIV8 Enabled
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*
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* License: GNU GPL v3 (see License.txt)
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*/
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#define F_CPU 1000000UL
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// includes
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#include <avr/io.h>
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#include <stdbool.h>
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#include "main.h"
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// variables
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volatile unsigned int time_counter, user_time_counter = 0, sec_counter = 0; // global and universal time counter (ms) and second-counter (for AutoOff)
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volatile unsigned int button_1_cup_counter = 0, button_2_cup_counter = 0; // button counter
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volatile unsigned char button_power_counter = 0;
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volatile unsigned char led = 0; // LED status flags
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volatile bool water = false, temperature = false, make_clean = false; // water-, temperature-, clean-flags
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volatile unsigned char make_coffee = 0, pump_time = 0; // pump time, clean mode flag
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int main(void)
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{
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init(); // initialization
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power_off(); // power off after init sequece
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while (1) // main loop
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{
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if (sec_counter >= AUTO_OFF_THRESHOLD) button_power_counter = BUTTON_THRESHOLD; // check for AutoOff Timer (generate OnOff-button push)
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water = get_water(); // update water state
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temperature = get_temperature(); // update temperature
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if (button_power_counter >= BUTTON_THRESHOLD) // button "OnOff" pushed:
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{
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set_bit(TRIAC_BOILER_w, TRIAC_BOILER_pin); // Boiler off
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make_coffee = 0; // clear coffee flag
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while (button_power_counter > 0); // wait until button is releasd (debounce)
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power_off(); // call power off sequence
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button_power_counter = BUTTON_THRESHOLD; // debounce again after wake up
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while (button_power_counter > 0);
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}
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if (button_1_cup_counter >= BUTTON_CLEAN_THR && button_2_cup_counter >= BUTTON_CLEAN_THR ) // both coffee buttons pushed: clean mode:
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{
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make_clean = true; // clean flag true
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led = 0b00010000; // set blue LED
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while (button_1_cup_counter > 0 && button_2_cup_counter > 0); // debounce buttons
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}
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else if (button_1_cup_counter >= BUTTON_THRESHOLD && button_2_cup_counter < BUTTON_THRESHOLD) // left coffee button pushed: call espresso
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{
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sec_counter = 0; // reset AutoOff counter
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if (water && temperature) // machine ready:
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{
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while(button_1_cup_counter > 0) // check if button is pushed long time
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{
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if(button_1_cup_counter > BUTTON_LONG_THR) // button pushed for a long time:
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{
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make_coffee = 1; // set coffee flag to 1 (1 espresso)
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button_1_cup_counter = 0; // clear button counter
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}
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}
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if(make_coffee != 1) make_coffee = 3; // set coffee flag to 3 (1 coffee) else
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}
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}
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else if (button_1_cup_counter < BUTTON_THRESHOLD && button_2_cup_counter >= BUTTON_THRESHOLD) // right coffee button pushed: call coffee
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{
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sec_counter = 0; // reset AutoOff counter
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if (water && temperature) // machine ready:
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{
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while(button_2_cup_counter > 0) // check if button is pushed long time
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{
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if(button_2_cup_counter > BUTTON_LONG_THR) // button pushed for a long time:
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{
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make_coffee = 2; // set coffee flag to 2 (2 espresso)
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button_2_cup_counter = 0; // clear button counter
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}
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}
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if(make_coffee != 2) make_coffee = 4; // set coffee flag to 4 (2 coffee) else
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}
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}
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if (water) // water OK:
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{
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if(make_clean) // if clean-flag is set:
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{
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set_bit(TRIAC_BOILER_w, TRIAC_BOILER_pin); // boiler off
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bool escape = false; // init escape-flag
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while (water && !escape) { // pump until water is empty or escape flag is set
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unsigned int sense = detect_zero_crossing(); // detect zero crossing
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if (sense <= 100) {
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clear_bit(TRIAC_PUMP_w, TRIAC_PUMP_pin); // generate trigger impulse for pump triac
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_delay_ms(3);
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set_bit(TRIAC_PUMP_w, TRIAC_PUMP_pin);
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}
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water = get_water(); // update water state
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if (button_power_counter > BUTTON_THRESHOLD) escape = true; // check for power button counter and set escape flag
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}
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make_clean = false; // clear clean flag
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}
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else if (temperature) // temperature OK:
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{
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set_bit(TRIAC_BOILER_w, TRIAC_BOILER_pin); // boiler off
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led = 0b00000100; // set green LED
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if (make_coffee > 0) // if coffee flag is set:
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{
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if(make_coffee<3) led = 0b00001010; // set orange LED blink
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else led = 0b00001000; // set green LED blink
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if (make_coffee == 1) pump_time = 15; // 1 cup of espresso (2s preinfusion included)
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else if (make_coffee == 2) pump_time = 28; // 2 cups of espresso (2s preinfusion included)
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else if (make_coffee == 3) pump_time = 26; // 1 cup of coffee
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else if (make_coffee == 4) pump_time = 52; // 2 cups of coffee
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else make_coffee = 0;
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user_time_counter = 0; // reset user time counter
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bool escape = false; // init escape flag
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while (user_time_counter < (pump_time * 1000) && water && !escape) // loop until pump time is reached or water is empty
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{
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if(make_coffee > 2 ||
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(user_time_counter < 2000 || user_time_counter > 4000) ) { // check for preinfusion break
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unsigned int sense = detect_zero_crossing(); // detect zero crossing
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if (sense <= 100)
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{
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clear_bit(TRIAC_PUMP_w, TRIAC_PUMP_pin); // generate trigger impulse for pump triac
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_delay_ms(3);
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set_bit(TRIAC_PUMP_w, TRIAC_PUMP_pin);
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}
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}
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water = get_water(); // update water state
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if (button_power_counter > BUTTON_THRESHOLD) escape = true; // check for power button counter and set escape flag
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}
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set_bit(TRIAC_PUMP_w, TRIAC_PUMP_pin); // pump off
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make_coffee = 0; // clear coffee flag
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sec_counter = 0; // reset AutoOff timer
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}
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}
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else // temperature too low:
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{
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clear_bit(TRIAC_BOILER_w, TRIAC_BOILER_pin); // boiler on
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led = 0b00000010; // set red LED blink
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}
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}
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else // water too low:
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{
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set_bit(TRIAC_BOILER_w, TRIAC_BOILER_pin); // boiler off
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set_bit(TRIAC_PUMP_w, TRIAC_PUMP_pin); // pump off
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led = 0b00100000; // set blue LED blink
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}
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}
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}
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/* function: init()
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* return: void
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*
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* Initializes relevant bits, timer and ADC.
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*/
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void init()
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{
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clear_bit(ZERO_CROSSING_ddr, ZERO_CROSSING_pin); // zero crossing dection pins as input
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clear_bit(ZERO_CROSSING_w, ZERO_CROSSING_pin); // no internal pull-up (for ADC)
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clear_bit(BUTTON_1_CUP_ddr, BUTTON_1_CUP_pin); // button pins as input
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set_bit(BUTTON_1_CUP_w, BUTTON_1_CUP_pin); // activate internal pull-ups
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clear_bit(BUTTON_2_CUP_ddr, BUTTON_2_CUP_pin);
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set_bit(BUTTON_2_CUP_w, BUTTON_2_CUP_pin);
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clear_bit(BUTTON_POWER_ddr, BUTTON_POWER_pin);
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set_bit(BUTTON_POWER_w, BUTTON_POWER_pin);
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set_bit(LED_RED_ddr, LED_RED_pin); // LED pins as output
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clear_bit(LED_RED_w, LED_RED_pin); // clear outputs (LEDs off)
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set_bit(LED_GREEN_ddr, LED_GREEN_pin);
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clear_bit(LED_GREEN_w, LED_GREEN_pin);
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set_bit(LED_BLUE_ddr, LED_BLUE_pin);
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clear_bit(LED_BLUE_w, LED_BLUE_pin);
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clear_bit(SENSOR_MAGNET_ddr, SENSOR_MAGNET_pin); // sensor pins as input
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clear_bit(SENSOR_MAGNET_w, SENSOR_MAGNET_pin); // no internal pull-up (for ADC)
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clear_bit(SENSOR_TEMP_ddr, SENSOR_TEMP_pin);
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clear_bit(SENSOR_TEMP_w, SENSOR_TEMP_pin);
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set_bit(TRIAC_BOILER_ddr, TRIAC_BOILER_pin); // triac pins as output
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set_bit(TRIAC_BOILER_w, TRIAC_BOILER_pin); // set outputs high (triac off)
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set_bit(TRIAC_PUMP_ddr, TRIAC_PUMP_pin);
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set_bit(TRIAC_PUMP_w, TRIAC_PUMP_pin);
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ADCSR = (1 << ADEN) | (1 << ADPS1); // enable ADC, prescaler division factor 4
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// TIMER1
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set_bit(TCCR1B, CTC1); // set timer 1 to CTC-Mode
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clear_bit(TCCR1B, CS11); // prescaler 8
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set_bit(TCCR1B, CS12);
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clear_bit(TCCR1B, CS11);
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clear_bit(TCCR1B, CS10);
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OCR1C = 124; // period of 1 ms
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cli(); // disable interrupts
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clear_bit(GIMSK, INT0); // disable interrupt 0
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set_bit(TIMSK, TOIE1); // activate timer 1
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sei(); // enable interrupts
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}
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/* function: power_off()
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* return: void
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*
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* Clear bits and set controller to sleep mode.
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*/
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void power_off()
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{
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cli(); // disable interrupts
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set_bit(GIMSK, INT0); // activate interrupt 0 (for wake-up)
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clear_bit(TIMSK, TOIE1); // deactivate timer 1
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sei(); // enable interrupts
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clear_bit(LED_RED_w, LED_RED_pin); // clear LED outputs
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clear_bit(LED_GREEN_w, LED_GREEN_pin);
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clear_bit(LED_BLUE_w, LED_BLUE_pin);
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set_bit(MCUCR, SM1); // activate power-down mode
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clear_bit(MCUCR, SM0);
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set_bit(MCUCR, SE);
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asm volatile("sleep"::);
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// entrance after wake-up:
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time_counter = 0; // reset counter
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sec_counter = 0;
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cli(); // disable interrupts
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clear_bit(GIMSK, INT0); // disable interrupt 0
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set_bit(TIMSK, TOIE1); // enable timer 1
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sei(); // enable interrupts
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}
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/* function: get_water()
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* return: true water OK
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* false not enough water
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*
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* Checks hall sensor for water state.
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*/
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bool get_water()
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{
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ADMUX = SENSOR_MAGNET_adc | (1 << ADLAR); // ADLAR
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set_bit(ADCSR, ADSC);
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loop_until_bit_is_clear(ADCSR, ADSC);
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unsigned char sense = ADCH;
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if ((water && sense > WATER_LOW) || (!water && sense >= WATER_OK)) return true;
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return false;
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}
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/* function: get_temperature()
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* return: true temperature OK
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* false temperature too low
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*
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* Checks NTC sensor for temperature state.
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*/
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bool get_temperature()
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{
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ADMUX = SENSOR_TEMP_adc | (1 << ADLAR); // ADLAR
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set_bit(ADCSR, ADSC);
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loop_until_bit_is_clear(ADCSR, ADSC);
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unsigned char sense = ADCH;
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if (sense >= OPERATING_TEMPERATURE) return true;
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return false;
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}
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/* function: detect_zero_crossing()
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* return: unsigned int ADC value
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*
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* Checks for zero crossing (with fixed offset)
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*/
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unsigned int detect_zero_crossing()
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{
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ADMUX = ZERO_CROSSING_adc;
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set_bit(ADCSR, ADSC);
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loop_until_bit_is_clear(ADCSR, ADSC);
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unsigned char sense_L = ADCL;
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unsigned char sense_H = ADCH;
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return (sense_H << 8) | sense_L;
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}
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/* interrupt function: INT0_vect
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*
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* Dummy function for wake-up.
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*/
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ISR(INT0_vect)
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{
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}
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/* interrupt function: TIMER1_OVF1_vect
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*
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* Timer interrupt. Increments counters and controls LED.
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*/
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// Millisekundenzähler, LED-Steuerung, Tastenzähler
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ISR(TIMER1_OVF1_vect)
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{
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if (time_counter < 1000) time_counter++; // blobal milliseconds counter und seconds counter (für AutoOff)
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else {
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time_counter = 0;
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sec_counter++;
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}
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user_time_counter++; // universal counter (for pump time)
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bool leds_blink_on; // status flag for blinking LEDs with 1Hz
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if (time_counter < 499) leds_blink_on = true;
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else leds_blink_on = false;
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if (led & ( 1 << LED_RED_ON ) || (led & ( 1 << LED_RED_BLINK ) && leds_blink_on)) set_bit(LED_RED_w, LED_RED_pin);
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else clear_bit(LED_RED_w, LED_RED_pin);
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if (led & ( 1 << LED_GREEN_ON ) || (led & ( 1 << LED_GREEN_BLINK ) && leds_blink_on)) set_bit(LED_GREEN_w, LED_GREEN_pin);
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else clear_bit(LED_GREEN_w, LED_GREEN_pin);
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if (led & ( 1 << LED_BLUE_ON ) || (led & ( 1 << LED_BLUE_BLINK ) && leds_blink_on)) set_bit(LED_BLUE_w, LED_BLUE_pin);
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else clear_bit(LED_BLUE_w, LED_BLUE_pin);
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if (bit_is_clear(BUTTON_1_CUP_r, BUTTON_1_CUP_pin)) { // left button counter
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if (button_1_cup_counter < 65535) button_1_cup_counter++;
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} else {
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if (button_1_cup_counter > 0) button_1_cup_counter--;
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}
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if (bit_is_clear(BUTTON_2_CUP_r, BUTTON_2_CUP_pin)) { // right button counter
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if (button_2_cup_counter < 65535) button_2_cup_counter++;
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} else {
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if (button_2_cup_counter > 0) button_2_cup_counter--;
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}
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if (bit_is_clear(BUTTON_POWER_r, BUTTON_POWER_pin)) { // power button counter
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if (button_power_counter < 255) button_power_counter++;
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} else {
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if (button_power_counter > 0) button_power_counter--;
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}
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}
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