Theaninova/Arduino-IRremote
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update custom_delay function

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Use micros() to delay based on "real-time" instead of approximation with
delay() or delayMicroseconds()

Changed name to _usec to correspond to MicroSeconds.
_ms is MilliSeconds.
This commit is contained in:
Paul Coughlin
2015-08-14 20:22:34 -06:00
parent 11cb3fe442
commit 7aee7fcf89
2 changed files with 15 additions and 13 deletions
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2
IRremote.h
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@@ -253,7 +253,7 @@ class IRsend
public:
IRsend () { }
void custom_delay_ms (unsigned int time);
void custom_delay_usec (unsigned long uSecs);
void enableIROut (int khz) ;
void mark (int usec) ;
void space (int usec) ;

26
irSend.cpp
View File

@@ -22,7 +22,7 @@ void IRsend::sendRaw (unsigned int buf[], unsigned char len, unsigned char hz
void IRsend::mark (int time)
{
TIMER_ENABLE_PWM; // Enable pin 3 PWM output
if (time > 0) custom_delay_ms(time);
if (time > 0) custom_delay_usec(time);
}
//+=============================================================================
@@ -33,7 +33,7 @@ void IRsend::mark (int time)
void IRsend::space (int time)
{
TIMER_DISABLE_PWM; // Disable pin 3 PWM output
if (time > 0) IRsend::custom_delay_ms(time);
if (time > 0) IRsend::custom_delay_usec(time);
}
@@ -71,14 +71,16 @@ void IRsend::enableIROut (int khz)
//+=============================================================================
// Custom delay function that circumvents Arduino's delayMicroseconds limit
void IRsend::custom_delay_ms(unsigned int time) {
if (time)
{
if (time > 16000)
{
delayMicroseconds(time % 1000);
delay(time / 1000);
}
else delayMicroseconds(time);
}
void IRsend::custom_delay_usec(unsigned long uSecs) {
if (uSecs > 4) {
unsigned long start = micros();
unsigned long endMicros = start + uSecs - 4;
if (endMicros < start) { // Check if overflow
while ( micros() > start ) {} // wait until overflow
}
while ( micros() < endMicros ) {} // normal wait
} else {
__asm__("nop\n\t"); // must have or compiler optimizes out
}
}