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/********
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* This file is part of Tooltron.
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*
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* Tooltron is free software: you can redistribute it and/or modify
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* it under the terms of the Lesser GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Tooltron is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* Lesser GNU General Public License for more details.
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* You should have received a copy of the Lesser GNU General Public License
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* along with Tooltron. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2009 Kevin Woo <kwoo@2ndt.com>
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*
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********/
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/** @file main.c
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* @brief Contains the main function for the toolbox code.
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*
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* @author Suresh Nidhiry (snidhiry@andrew.cmu.edu)
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* @author Kevin Woo (kwoo@2ndt.com)
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*/
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//Includes
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#include <avr/io.h> |
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#include <avr/interrupt.h> |
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#include <stdint.h> |
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#include <util/delay.h> |
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#include <tooltron.h> |
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#include "jumptable.h" |
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#define TOOLBOX
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#define RELAY _BV(PORTD4)
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#define VAC_SENSE _BV(PIND3)
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#define BUT_RED _BV(PINB4)
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#define BUT_BLACK _BV(PINB3)
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#define LED_GREEN _BV(PORTB2)
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#define LED_YELLOW _BV(PORTB1)
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#define LED_RED _BV(PORTB0)
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#define ON 0x01 |
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#define OFF 0x00 |
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/***** change ADDR ****/
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#define ADDR 18 |
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#define DELIM '^' |
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#define SERVER 1 |
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#define TURNON 'O' |
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/***
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* TWAIT - minutes to wait before green button is pressed to kill power
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* TWARN - minutes until warning (blink yellow, allow more time with green button)
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* TMAX - minutes until power is killed (unless tool is on)
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*/
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#define TWAIT 1 |
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#define TWARN 1 |
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#define TMAX 2 |
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uint8_t sec; |
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uint8_t min; |
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typedef enum { |
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sd, // start delimitor
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src, // src
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dest, // destination
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data, // data
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cs, // checksum
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ack, // send ack
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pwron, // poweron
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idiot, // user tried to hit green with the machine switch on
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toolon, // tool on
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warn, // time warning
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off // tool off
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} state_t; |
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void init_pins(void) { |
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DDRB = 0x00;
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DDRB = _BV(DDB0) | _BV(DDB1) | _BV(DDB2) | _BV(DDB5); |
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DDRD = _BV(DDB4); |
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PORTB = 0x00;
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} |
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void toggle_led(uint8_t which, uint8_t state) {
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if (state == ON) {
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PORTB &= ~which; |
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} else {
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PORTB |= which; |
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} |
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} |
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void toggle_relay(uint8_t state) {
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if (state == ON) {
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PORTD |= RELAY; |
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} else {
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PORTD &= ~RELAY; |
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} |
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} |
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inline uint8_t read_vac(void) { |
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return (!(PIND & VAC_SENSE));
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} |
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inline uint8_t read_button(uint8_t which) {
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return (!(PINB & which));
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} |
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void init_timer(void) { |
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// Clear timmer on OCRA1 Compare match
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// No prescale
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TCCR1B |= _BV(WGM12) | _BV(CS12); |
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// 1 second @ 8MHz clock
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OCR1AH =0x7A;
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OCR1AL =0x12;
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TIMSK = _BV(OCIE1A); |
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sec = 0;
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min = 0;
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} |
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void reset_timer(void) { |
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sec = 0;
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min = 0;
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} |
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ISR(TIMER1_COMPA_vect) { |
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if (sec == 59) { |
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sec = 0;
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min++; |
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} else {
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sec++; |
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} |
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} |
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int main(int argc, char **argv) { |
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state_t state = sd; |
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uint8_t packet[3];
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uint8_t ms_timer=0;
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/***** Start Start-up Sequence *****/
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sei(); //Enable interrupts
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init_timer(); //Set registers for timer
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init_pins(); //Set pin directions
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rs485_init(51);
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/***** End Start-up Sequence *****/
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uint8_t r; |
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packet[0] = 0x00; |
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packet[1] = 0x00; |
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packet[2] = 0x00; |
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while(1) { |
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switch (state) {
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case sd:
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toggle_led(LED_RED, ON); |
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toggle_led(LED_YELLOW, OFF); |
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toggle_led(LED_GREEN, OFF); |
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toggle_relay(OFF); |
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while ((rs485_get_byte(&r)) < 0); |
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if (r == DELIM) {
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state = src; |
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} |
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break;
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case src:
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while ((rs485_get_byte(&r)) < 0); |
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if (r == DELIM) {
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state = src; |
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} else {
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packet[0] = r;
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state = dest; |
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} |
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break;
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case dest:
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while ((rs485_get_byte(&r)) < 0); |
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if (r == DELIM) {
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packet[0] = 0x00; |
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state = src; |
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} else if (r == ADDR) { |
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packet[1] = r;
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state = data; |
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} else {
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packet[0] = 0x00; |
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state = sd; |
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} |
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break;
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case data:
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while ((rs485_get_byte(&r)) < 0); |
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if (r == DELIM) {
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packet[0] = 0x00; |
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packet[1] = 0x00; |
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state = src; |
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} else {
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packet[2] = r;
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state = cs; |
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} |
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break;
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case cs:
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while ((rs485_get_byte(&r)) < 0); |
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if (r == (packet[0] ^ packet[1] ^ packet[2])) { |
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if (packet[2] == TURNON) { |
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state = ack; |
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break;
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} |
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} |
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packet[0] = 0x00; |
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packet[1] = 0x00; |
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packet[2] = 0x00; |
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state = sd; |
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break;
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case ack:
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rs485_send_byte(DELIM); |
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rs485_send_byte(ADDR); |
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rs485_send_byte(SERVER); |
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rs485_send_byte('A');
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rs485_send_byte(ADDR ^ SERVER ^ 'A');
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toggle_led(LED_RED, OFF); |
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toggle_led(LED_YELLOW, ON); |
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state = pwron; |
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reset_timer(); |
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break;
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case pwron:
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if (read_vac() == ON) {
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ms_timer = 0;
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state = idiot; |
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break;
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} |
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if (read_button(BUT_BLACK)) {
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toggle_led(LED_YELLOW, OFF); |
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toggle_led(LED_GREEN, ON); |
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toggle_relay(ON); |
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reset_timer(); |
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state = toolon; |
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} else if ((read_button(BUT_RED)) || (min >= TWAIT)) { |
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state = off; |
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} |
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break;
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case idiot:
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if (read_vac() == OFF) {
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state = pwron; |
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toggle_led(LED_RED, OFF); |
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toggle_led(LED_YELLOW, ON); |
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break;
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} |
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if (read_button(BUT_RED)) {
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state = off; |
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break;
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} |
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if(ms_timer >= 100) { |
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toggle_led(LED_YELLOW, ON); |
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toggle_led(LED_RED, OFF); |
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if(ms_timer >= 200) { |
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ms_timer = 0;
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} |
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} |
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else {
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toggle_led(LED_YELLOW, OFF); |
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toggle_led(LED_RED, ON); |
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} |
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_delay_ms(2);
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ms_timer++; |
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break;
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case toolon:
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if ((read_button(BUT_RED)) && (read_vac() == OFF)) {
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state = off; |
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toggle_relay(OFF); |
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} else if (min >= TWARN) { |
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toggle_led(LED_GREEN, OFF); |
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state = warn; |
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} |
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break;
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case warn:
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if(ms_timer >= 100) { |
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toggle_led(LED_YELLOW, ON); |
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if(ms_timer >= 200) { |
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ms_timer = 0;
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} |
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} |
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else {
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toggle_led(LED_YELLOW, OFF); |
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} |
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if (read_button(BUT_RED) && read_vac() == OFF) {
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toggle_relay(OFF); |
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state = off; |
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} else if (read_button(BUT_BLACK)) { |
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toggle_led(LED_GREEN, ON); |
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toggle_led(LED_YELLOW, OFF); |
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reset_timer(); |
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state = toolon; |
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} else if ((min >= TMAX) && (read_vac() == OFF)) { |
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toggle_relay(OFF); |
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state = off; |
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} |
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_delay_ms(2);
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ms_timer++; |
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break;
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case off:
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toggle_led(LED_GREEN, OFF); |
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toggle_led(LED_YELLOW, OFF); |
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toggle_led(LED_RED, ON); |
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state = sd; |
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break;
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default: state = sd;
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} |
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} |
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return 0; |
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} |