114 lines
2.5 KiB
C++
114 lines
2.5 KiB
C++
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#include "config_user.h"
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#include "config.h"
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#define WIND_DEFAULT_MEAS_INIT 255
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volatile unsigned int anemometerRotations = 0;
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volatile uint32_t start_meas_wind_time = 0;
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int interruptNumber;
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#ifndef SENSOR_WIND_NO_ISR
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void ICACHE_RAM_ATTR _anemometerInterrupt()
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{
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if ((start_meas_wind_time + (WIND_SENSOR_MEAS_TIME_S * 1000)) <= millis())
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{
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// measurement already done, prevent read of further rotations
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return;
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}
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anemometerRotations++;
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#ifdef DEBUG
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Serial.print("*");
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debug("*");
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#endif
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}
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#endif // end of if not defined SENSOR_WIND_NO_ISR
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float wind_speed()
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{
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start_measure_wind();
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do {
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delay(1000); // minimum delay of measurement time is 1 second
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} while (check_measure_wind_done() == false);
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return measure_wind_result();
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}
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void start_measure_wind()
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{
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anemometerRotations = 0;
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#ifndef SENSOR_WIND_NO_ISR
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start_meas_wind_time = millis();
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interruptNumber = digitalPinToInterrupt(ANEMOMETER_PIN);
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attachInterrupt(interruptNumber, _anemometerInterrupt, FALLING);
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#endif
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}
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boolean check_measure_wind_done()
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{
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static uint8_t previous_pin_state = WIND_DEFAULT_MEAS_INIT;
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static uint8_t tmp_pin_state = WIND_DEFAULT_MEAS_INIT;
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static uint32_t meas_time_done = 0;
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#ifndef SENSOR_WIND_NO_ISR
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// interrupt routine based measurement
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if ((start_meas_wind_time + (WIND_SENSOR_MEAS_TIME_S * 1000)) <= millis())
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{
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detachInterrupt(interruptNumber);
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return true;
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}
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#endif
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#ifdef SENSOR_WIND_NO_ISR
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if (meas_time_done >= (WIND_SENSOR_MEAS_TIME_S * 1000))
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{
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meas_time_done = 0;
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previous_pin_state = WIND_DEFAULT_MEAS_INIT;
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return true;
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} else {
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// measure wind without ISR
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uint32_t start = millis();
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do {
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// read pin state
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previous_pin_state = tmp_pin_state;
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tmp_pin_state = digitalRead(ANEMOMETER_PIN);
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if (previous_pin_state != tmp_pin_state && tmp_pin_state == 0 && previous_pin_state != WIND_DEFAULT_MEAS_INIT)
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{
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// only count rotations on falling edges
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anemometerRotations++;
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#ifdef DEBUG
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Serial.print("*");
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debug("*");
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#endif
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}
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// wait 5 ms
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delay(5);
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#ifdef ENABLE_WATCHDOG
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// feed the watchdog to prevent reset
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WDT_FEED();
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#endif
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} while ((start + WIND_SPEED_MEAS_NO_ISR_TIME_MS) >= millis());
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meas_time_done += WIND_SPEED_MEAS_NO_ISR_TIME_MS;
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}
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#endif // SENSOR_WIND_NO_ISR
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return false;
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}
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float measure_wind_result()
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{
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start_meas_wind_time = 0;
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#ifdef DEBUG
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debug("rotations = " + String((float)anemometerRotations));
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#endif
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return (float)anemometerRotations * WINDSPEED_FACTOR;
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}
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