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https://github.com/Theaninova/Arduino-IRremote.git
synced 2025-12-27 00:36:15 +00:00
315aecdada
Utterly failed to reduce the MARK_?? functions back down to MACROs - every time I try, the decoders start failing ...However, I have found a considerable number of bugs in the toolchain, so I'm starting to wonder if the fault is not mine.
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
#include <avr/interrupt.h>
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#include "IRremote.h"
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#include "IRremoteInt.h"
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//+=============================================================================
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// TIMER2 interrupt code to collect raw data.
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// Widths of alternating SPACE, MARK are recorded in rawbuf.
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// Recorded in ticks of 50 microseconds.
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// rawlen counts the number of entries recorded so far.
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// First entry is the SPACE between transmissions.
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// As soon as a SPACE gets long, ready is set, state switches to IDLE, timing of SPACE continues.
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// As soon as first MARK arrives, gap width is recorded, ready is cleared, and new logging starts
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//
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ISR (TIMER_INTR_NAME)
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{
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TIMER_RESET;
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uint8_t irdata = (uint8_t)digitalRead(irparams.recvpin);
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irparams.timer++; // One more 50us tick
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if (irparams.rawlen >= RAWBUF) irparams.rcvstate = STATE_STOP ; // Buffer overflow
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switch(irparams.rcvstate) {
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case STATE_IDLE: // In the middle of a gap
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if (irdata == MARK) {
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if (irparams.timer < GAP_TICKS) {
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// Not big enough to be a gap.
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irparams.timer = 0;
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}
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else {
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// gap just ended, record duration and start recording transmission
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irparams.rawlen = 0;
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irparams.rawbuf[irparams.rawlen++] = irparams.timer;
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irparams.timer = 0;
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irparams.rcvstate = STATE_MARK;
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}
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}
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break;
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case STATE_MARK: // timing MARK
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if (irdata == SPACE) { // MARK ended, record time
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irparams.rawbuf[irparams.rawlen++] = irparams.timer;
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irparams.timer = 0;
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irparams.rcvstate = STATE_SPACE;
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}
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break;
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case STATE_SPACE: // timing SPACE
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if (irdata == MARK) { // SPACE just ended, record it
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irparams.rawbuf[irparams.rawlen++] = irparams.timer;
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irparams.timer = 0;
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irparams.rcvstate = STATE_MARK;
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}
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else { // SPACE
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if (irparams.timer > GAP_TICKS) {
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// big SPACE, indicates gap between codes
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// Mark current code as ready for processing
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// Switch to STOP
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// Don't reset timer; keep counting space width
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irparams.rcvstate = STATE_STOP;
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}
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}
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break;
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case STATE_STOP: // waiting, measuring gap
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if (irdata == MARK) irparams.timer = 0 ; // reset gap timer
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break;
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}
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if (irparams.blinkflag) {
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if (irdata == MARK) BLINKLED_ON() ; // turn pin 13 LED on
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else BLINKLED_OFF() ; // turn pin 13 LED off
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}
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}
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