diff --git a/include/arch/arduino-nano/driver/counter.h b/include/arch/arduino-nano/driver/counter.h new file mode 100644 index 0000000000000000000000000000000000000000..d387a354861653e833c12e4956b50e03ed2fc57f --- /dev/null +++ b/include/arch/arduino-nano/driver/counter.h @@ -0,0 +1,27 @@ +#include +#include + +class Counter { + private: + Counter(const Counter ©); + + 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; diff --git a/src/arch/arduino-nano-168/Makefile.inc b/src/arch/arduino-nano-168/Makefile.inc index 2f501f601c6a2888a467d5ffb883f2be5365d144..61492dbb96088ba6761dcebfdc3f36b8abb25f33 100644 --- a/src/arch/arduino-nano-168/Makefile.inc +++ b/src/arch/arduino-nano-168/Makefile.inc @@ -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) diff --git a/src/arch/arduino-nano/Makefile.inc b/src/arch/arduino-nano/Makefile.inc index 30d9638bf1e4f66f6ac599a30a228ee194625ecb..889668147ba52bc654bdabaa9da2ee920f641ee0 100644 --- a/src/arch/arduino-nano/Makefile.inc +++ b/src/arch/arduino-nano/Makefile.inc @@ -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) diff --git a/src/arch/arduino-nano/driver/counter.cc b/src/arch/arduino-nano/driver/counter.cc new file mode 100644 index 0000000000000000000000000000000000000000..4e629836cf4768b89d02305fb28f712c10dcf5cf --- /dev/null +++ b/src/arch/arduino-nano/driver/counter.cc @@ -0,0 +1,10 @@ +#include "driver/counter.h" + +Counter counter; + +ISR(TIMER1_OVF_vect) +{ + if (counter.overflowed < 255) { + counter.overflowed++; + } +}