108 lines
2.2 KiB
C++
108 lines
2.2 KiB
C++
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/*
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* Interrupt.hpp
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*
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* Created: 18.11.2014 00:27:52
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* Author: netz
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*/
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#ifndef INTERRUPT_H_
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#define INTERRUPT_H_
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#include <util/delay.h>
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template <typename Port, int pin_int, typename Led>
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class IR {
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public:
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IR() {
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this->init();
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}
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int read() {
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if(intpin::value()) { //Is High, Abbort
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return 254;
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}
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_delay_ms(4); //Wait 4ms
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if(intpin::value()) { //Is High, Abbort
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return 254;
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}
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intpin::wait_is_set(); //Wait for the rest of the init.
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intpin::wait_is_clear(); // Init Complete, wait for first Byte
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//Read First Byte must be 0!
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if(this->read8bit() != 0) { //Is first Byte not 0 Abbort;
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return 255;
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}
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//Read Second Byte must be 239!
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if(this->read8bit() != 239) {
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return 255;
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}
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//Read Byte 3 and 4 (Data Byte and Checksum Byte!
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uint8_t a = this->read8bit();
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uint8_t b = this->read8bit();
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//Make Checksum Byte 3 + 4 must be 255!
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if(a+b != 255) {
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return 255;
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}
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return a; //Return Byte 3
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}
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//The Interrupt Function
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void interrupt() {
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led.red(1);
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uint8_t code = this->read();
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if(code == 255) {
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_delay_ms(500);
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} else if(code == 254) {
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_delay_ms(1);
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} else {
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this->_code = code;
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}
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led.red(0);
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EIFR |= (1<<INTF0);
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}
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uint8_t getCode() {
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uint8_t ret = this->_code;
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this->_code = 255;
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return ret;
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}
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private:
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Led led;
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uint8_t _code;
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void init() {
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intpin::make_input();
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this->_code = 255;
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this->init_int();
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}
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void init_int() {
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// External Interrupt(s) initialization
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// INT0: On
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// INT0 Mode: Falling Edge
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// INT1: Off
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// Interrupt on any change on pins PCINT0-7: Off
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// Interrupt on any change on pins PCINT8-14: Off
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// Interrupt on any change on pins PCINT16-23: Off
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EICRA=(0<<ISC11) | (0<<ISC10) | (1<<ISC01) | (0<<ISC00);
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EIMSK=(0<<INT1) | (1<<INT0);
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EIFR=(0<<INTF1) | (0<<INTF0);
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}
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uint8_t read8bit() {
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uint8_t r = 0;
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for (uint8_t i=0;i<8;i++) {
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intpin::wait_is_set();
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_delay_us(800);
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if(intpin::read()) {
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r |= (1<<i);
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}
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for(uint8_t j=0;j<50;j++) {
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if(!intpin::value()) {
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break;
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}
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_delay_us(20);
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}
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}
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return r;
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}
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const typedef avrlib::pin<Port, pin_int> intpin;
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};
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#endif /* INTERRUPT_H_ */
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