Commit cd7ee540 authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

msp430fr5969 counter: Track overflows

parent d1668a6f

include/arch/msp430fr5969lp/driver/counter.h

+7 −3
Original line number Diff line number Diff line
@@ -13,7 +13,7 @@ class Counter { 


	public:

		uint16_t value;

		uint8_t overflow;

		volatile uint8_t overflow;



		Counter() : overflow(0) {}
@@ -21,12 +21,16 @@ class Counter { 
			overflow = 0;

			TA2CTL = TASSEL__SMCLK | ID__1 | MC__CONTINUOUS;

			TA2EX0 = 0;

			TA2CTL |= TACLR;

			TA2CTL |= TACLR | TAIE;

			asm volatile("nop");

			__eint();

			asm volatile("nop");

		}



		inline void stop() {

			TA2CTL = 0;

			__dint();

			value = TA2R;

			TA2CTL = 0;

		}

};

src/arch/msp430fr5969lp/driver/counter.cc

+11 −0
Original line number Diff line number Diff line 
#include "arch.h"

#include "driver/counter.h"

#include "driver/gpio.h"



#if defined(TIMER_CYCLES)

#warn "timer_cycles and counter are mutually exclusive. Expect odd behaviour."

#endif



Counter counter;



__attribute__((interrupt(TIMER2_A1_VECTOR))) void handle_timer2_overflow()

{

	if (TA2IV == 0x0e) {

		if (counter.overflow < 255) {

			counter.overflow++;

		}

	}

}