PulseCounter

PulseCounter (mwx::periph_pulse_counter)

The pulse counter is a circuit that reads and counts pulses even when the microcontroller CPU is not running. There are two systems of pulse counters: PC0 is assigned to PulseCounter0 and PC1 to PulseCounter1.

PC0 is assigned to PulseCounter0 and PC1 is assigned to PulseCounter1.

method

begin()

void begin(uint16_t refct = 0, 
           E_PIN_INT_MODE edge = PIN_INT_MODE::FALLING,
           uint8_t debounce = 0)

Initializes the object and starts counting. the first parameter refct is the count number on which interrupts and available decisions are based. When this number is exceeded, it is reported to the application. You can also set refct to 0. In this case, it is not a sleep wake-up factor.

The second parameter edge specifies whether the interrupt is rising (PIN_INT_MODE::RISING) or falling (PIN_INT_MODE::FALLING).

The third debounce takes the values 0, 1, 2, or 3. 1, 2, or 3 settings require the same consecutive value to detect a change in value to reduce the effect of noise.

setting	number of consecutive samples	maximum detection frequency
0	-	100Khz
1	2	3.7Khz
2	4	2.2Khz
3	8	1.2Khz

end()

void end()

Discontinue detection.

available()

inline bool available()

If the specified count (refct in begin()) is 0, true is returned when the count exceeds 1.

If the specified count (refct in begin()) is 1 or more, true is returned when the number of detections exceeds the specified count.

read()

uint16_t read()

Reads the count value. Resets the count value to 0 after reading.