45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <avr/io.h>
|
|
#include <avr/interrupt.h>
|
|
#include "moisture.h"
|
|
#include "config.h"
|
|
#include "adc.h"
|
|
|
|
volatile bool readSensors = false;
|
|
|
|
void sensorsInit(void) {
|
|
uint8_t sensorMask = 0;
|
|
for (uint8_t i = 0; i < SENSORS_NUM; i++) {
|
|
sensorMask |= (1 << sensorPins[i]);
|
|
}
|
|
DDRC &= ~sensorMask;
|
|
PORTC &= ~sensorMask;
|
|
}
|
|
|
|
inline void triggerMoistureRead(void) {
|
|
readSensors = true;
|
|
}
|
|
|
|
static uint16_t moistureAverage(uint8_t sensorPin) {
|
|
uint16_t sum = 0;
|
|
for (uint8_t i = 0; i < SENSOR_READINGS; i++) {
|
|
sum += adcRead(sensorPin);
|
|
//TODO: implement variance check (if over a certain variance discard measurements for this cycle)
|
|
//TODO IMPORTANT: if value < 1 or > 1022, discard that measurement
|
|
}
|
|
return sum / SENSOR_READINGS;
|
|
}
|
|
|
|
uint16_t moistureRead(void) {
|
|
uint16_t overallSum = 0;
|
|
|
|
for (uint8_t i = 0; i < SENSORS_NUM; i++) {
|
|
uint16_t sensorAverage = moistureAverage(sensorPins[i]);
|
|
//TODO: if a sensor gives 1023, discard that sensor entirely (means it is disconnected or not working)
|
|
overallSum += sensorAverage;
|
|
}
|
|
|
|
return overallSum / SENSORS_NUM;
|
|
}
|