Instructions from README.md not working

[jrddupont]

I am trying to use a TimerInterrupt on Timer1 on an Arduino Uno R3 using this method: https://github.com/khoih-prog/TimerInterrupt#11-init-hardware-timer
So I have this source code:

#include <TimerInterrupt.h>
#include <ISR_Timer.h>

#define USE_TIMER_1     true

ITimer1.init();

But I immediately get this error:

TimerTest:6:1: error: 'ITimer1' does not name a type; did you mean 'ISR_Timer'?
 ITimer1.init();
 ^~~~~~~
 ISR_Timer
exit status 1
'ITimer1' does not name a type; did you mean 'ISR_Timer'?

Am I following the instructions wrong? According to the source code, that object should exist: https://github.com/khoih-prog/TimerInterrupt/blob/master/src/TimerInterrupt.h#L477

[khoih-prog]

Thanks for your interest of the library.

You have to declare #define USE_TIMER_1 true before the #include <TimerInterrupt.h>, as follows

#define USE_TIMER_1     true

#include <TimerInterrupt.h>
#include <ISR_Timer.h>

void setup()
{
  ITimer1.init();
}

void loop() 
{

As usual, it's always better to start with a simplest example to have preliminary feelings and understand the basic operation of the library.

Good Luck,

[jrddupont]

Thank you! That makes a lot of sense 😅