Commit ec15c42a authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

arduino-nano: Add counter driver. Conflicts with timer_s=1 / loop=1

parent b2554d7b

include/arch/arduino-nano/driver/counter.h

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#include <avr/io.h>

#include <avr/interrupt.h>



class Counter {

	private:

		Counter(const Counter &copy);



	public:

		uint8_t overflowed;



		Counter() : overflowed(0) {}



		inline void start() {

			overflowed = 0;

			TCNT1 = 0;

			TCCR1A = 0;

			TCCR1B = _BV(CS10);

			TIMSK1 = _BV(TOIE1);

		}



		inline uint16_t stop() {

			TCCR1B = 0;

			return TCNT1;

		}

};



extern Counter counter;

src/arch/arduino-nano-168/Makefile.inc

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@@ -40,6 +40,10 @@ ifneq ($(findstring timer,${arch_drivers}), ) 
	CXX_TARGETS += src/arch/arduino-nano/driver/timer.cc

endif



ifneq ($(findstring counter,${arch_drivers}), )

	CXX_TARGETS += src/arch/arduino-nano/driver/counter.cc

endif



ifeq (${cpu_freq}, 16000000)

	uart_baud = 57600

else ifeq (${cpu_freq}, 8000000)

src/arch/arduino-nano/Makefile.inc

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@@ -40,6 +40,10 @@ ifneq ($(findstring timer,${arch_drivers}), ) 
	CXX_TARGETS += src/arch/arduino-nano/driver/timer.cc

endif



ifneq ($(findstring counter,${arch_drivers}), )

	CXX_TARGETS += src/arch/arduino-nano/driver/counter.cc

endif



ifeq (${cpu_freq}, 16000000)

	uart_baud = 57600

else ifeq (${cpu_freq}, 8000000)

src/arch/arduino-nano/driver/counter.cc

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#include "driver/counter.h"



Counter counter;



ISR(TIMER1_OVF_vect)

{

	if (counter.overflowed < 255) {

		counter.overflowed++;

	}

}