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Embed ArduinoTimers library

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Makes it so much easier for novice users as the ArduinoTimers libraray is not yet available from the IDE Library Manager.
This commit is contained in:
Asbelos
2020-08-23 14:14:04 +01:00
parent d3b486a071
commit 6a986d2b0c
9 changed files with 946 additions and 1 deletions
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194
ATMEGA2560/Timer.h Normal file
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#ifndef ATMEGA2560Timer_h
#define ATMEGA2560Timer_h
#include "../VirtualTimer.h"
#include <Arduino.h>
class Timer : public VirtualTimer {
private:
int pwmPeriod;
unsigned long timer_resolution;
unsigned char clockSelectBits;
int timer_num;
unsigned long lastMicroseconds;
public:
void (*isrCallback)();
Timer(int timer_num) {
switch (timer_num)
{
case 1:
case 3:
case 4:
case 5:
timer_resolution = 65536;
break;
}
this->timer_num = timer_num;
lastMicroseconds = 0;
}
void initialize() {
switch (timer_num)
{
case 1:
TCCR1B = _BV(WGM13) | _BV(WGM12);
TCCR1A = _BV(WGM11);
break;
case 3:
TCCR3B = _BV(WGM33) | _BV(WGM32);
TCCR3A = _BV(WGM31);
break;
case 4:
TCCR4B = _BV(WGM43) | _BV(WGM42);
TCCR4A = _BV(WGM41);
break;
case 5:
TCCR5B = _BV(WGM53) | _BV(WGM52);
TCCR5A = _BV(WGM51);
break;
}
}
void setPeriod(unsigned long microseconds) {
if(microseconds == lastMicroseconds)
return;
lastMicroseconds = microseconds;
const unsigned long cycles = (F_CPU / 1000000) * microseconds;
if (cycles < timer_resolution) {
clockSelectBits = 1 << 0;
pwmPeriod = cycles;
} else
if (cycles < timer_resolution * 8) {
clockSelectBits = 1 << 1;
pwmPeriod = cycles / 8;
} else
if (cycles < timer_resolution * 64) {
clockSelectBits = (1 << 0) | (1 << 1);
pwmPeriod = cycles / 64;
} else
if (cycles < timer_resolution * 256) {
clockSelectBits = 1 << 2;
pwmPeriod = cycles / 256;
} else
if (cycles < timer_resolution * 1024) {
clockSelectBits = (1 << 2) | (1 << 0);
pwmPeriod = cycles / 1024;
} else {
clockSelectBits = (1 << 2) | (1 << 0);
pwmPeriod = timer_resolution - 1;
}
switch (timer_num)
{
case 1:
ICR1 = pwmPeriod;
TCCR1B = _BV(WGM13) | _BV(WGM12) | clockSelectBits;
break;
case 3:
ICR3 = pwmPeriod;
TCCR3B = _BV(WGM33) | _BV(WGM32) | clockSelectBits;
break;
case 4:
ICR4 = pwmPeriod;
TCCR4B = _BV(WGM43) | _BV(WGM42) | clockSelectBits;
break;
case 5:
ICR5 = pwmPeriod;
TCCR5B = _BV(WGM53) | _BV(WGM52) | clockSelectBits;
break;
}
}
void start() {
switch (timer_num)
{
case 1:
TCCR1B = 0;
TCNT1 = 0; // TODO: does this cause an undesired interrupt?
TCCR1B = _BV(WGM13) | _BV(WGM12) | clockSelectBits;
break;
case 3:
TCCR3B = 0;
TCNT3 = 0; // TODO: does this cause an undesired interrupt?
TCCR3B = _BV(WGM33) | _BV(WGM32) | clockSelectBits;
break;
case 4:
TCCR4B = 0;
TCNT4 = 0; // TODO: does this cause an undesired interrupt?
TCCR4B = _BV(WGM43) | _BV(WGM42) | clockSelectBits;
break;
case 5:
TCCR5B = 0;
TCNT5 = 0; // TODO: does this cause an undesired interrupt?
TCCR5B = _BV(WGM53) | _BV(WGM52) | clockSelectBits;
break;
}
}
void stop() {
switch (timer_num)
{
case 1:
TCCR1B = _BV(WGM13) | _BV(WGM12);
break;
case 3:
TCCR3B = _BV(WGM33) | _BV(WGM32);
break;
case 4:
TCCR4B = _BV(WGM43) | _BV(WGM42);
break;
case 5:
TCCR5B = _BV(WGM53) | _BV(WGM52);
break;
}
}
void attachInterrupt(void (*isr)()) {
isrCallback = isr;
switch (timer_num)
{
case 1:
TIMSK1 = _BV(TOIE1);
break;
case 3:
TIMSK3 = _BV(TOIE3);
break;
case 4:
TIMSK4 = _BV(TOIE4);
break;
case 5:
TIMSK5 = _BV(TOIE5);
break;
}
}
void detachInterrupt() {
switch (timer_num)
{
case 1:
TIMSK1 = 0;
break;
case 3:
TIMSK3 = 0;
break;
case 4:
TIMSK4 = 0;
break;
case 5:
TIMSK5 = 0;
break;
}
}
};
extern Timer TimerA;
extern Timer TimerB;
extern Timer TimerC;
extern Timer TimerD;
#endif