Alternative ESP8266 bitbang carrirer generation method
This commit is contained in:
parent
420d1ac743
commit
011204472a
12
IRSender.h
12
IRSender.h
|
@ -83,6 +83,18 @@ class IRSenderESP8266 : public IRSender
|
|||
protected:
|
||||
uint32_t _halfPeriodicTime;
|
||||
};
|
||||
|
||||
class IRSenderESP8266Alt : public IRSender
|
||||
{
|
||||
public:
|
||||
IRSenderESP8266Alt(uint8_t pin);
|
||||
void setFrequency(int frequency);
|
||||
void space(int spaceLength);
|
||||
void mark(int markLength);
|
||||
|
||||
protected:
|
||||
uint32_t _halfPeriodicTime;
|
||||
};
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
|
|
@ -0,0 +1,51 @@
|
|||
#include <Arduino.h>
|
||||
#ifdef ESP8266
|
||||
#include <IRSender.h>
|
||||
|
||||
// Send IR using the 'bit banging' on ESP8266 using alternative ESP.getCycleCount() method
|
||||
|
||||
// Cycles compensation due to while cycles and polling ESP.getCycleCount()
|
||||
#define ESP8266_CYCLES_COMPENSATION 33
|
||||
|
||||
IRSenderESP8266Alt::IRSenderESP8266Alt(uint8_t pin) : IRSender(pin)
|
||||
{
|
||||
pinMode(_pin, OUTPUT);
|
||||
}
|
||||
|
||||
|
||||
void IRSenderESP8266Alt::setFrequency(int frequency)
|
||||
{
|
||||
// Enables IR output. The khz value controls the modulation frequency in kilohertz.
|
||||
_halfPeriodicTime = F_CPU / (frequency * 1000 * 2); // This one stores half period time in CPU ticks
|
||||
}
|
||||
|
||||
|
||||
// Send an IR 'mark' symbol, i.e. transmitter ON
|
||||
void IRSenderESP8266Alt::mark(int markLength)
|
||||
{
|
||||
long beginning = micros();
|
||||
|
||||
while((int)(micros() - beginning) < markLength){
|
||||
uint32_t periodStart = ESP.getCycleCount();
|
||||
digitalWrite(_pin, HIGH);
|
||||
while (ESP.getCycleCount() - periodStart < _halfPeriodicTime - ESP8266_CYCLES_COMPENSATION);
|
||||
|
||||
periodStart = ESP.getCycleCount();
|
||||
digitalWrite(_pin, LOW);
|
||||
while (ESP.getCycleCount() - periodStart < _halfPeriodicTime - ESP8266_CYCLES_COMPENSATION);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// Send an IR 'space' symbol, i.e. transmitter OFF
|
||||
void IRSenderESP8266Alt::space(int spaceLength)
|
||||
{
|
||||
digitalWrite(_pin, LOW);
|
||||
|
||||
if (spaceLength < 16383) {
|
||||
delayMicroseconds(spaceLength);
|
||||
} else {
|
||||
delay(spaceLength/1000);
|
||||
}
|
||||
}
|
||||
#endif
|
Loading…
Reference in New Issue