63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include "moisture.h"
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#include "config.h"
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#include "adc.h"
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volatile bool readSensors = false;
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void sensorsInit(void) {
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// Set as input
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DDRC &= ~((1 << MOISTURE_SENSOR_A0) |
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(1 << MOISTURE_SENSOR_A1) |
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(1 << MOISTURE_SENSOR_A2) |
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(1 << MOISTURE_SENSOR_A3) |
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(1 << MOISTURE_SENSOR_A4) |
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(1 << MOISTURE_SENSOR_A5)) ;
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//(1 << MOISTURE_SENSOR_A6) |
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//(1 << MOISTURE_SENSOR_A7));
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// Disable pullup
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PORTC &= ~((1 << MOISTURE_SENSOR_A0) |
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(1 << MOISTURE_SENSOR_A1) |
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(1 << MOISTURE_SENSOR_A2) |
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(1 << MOISTURE_SENSOR_A3) |
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(1 << MOISTURE_SENSOR_A4) |
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(1 << MOISTURE_SENSOR_A5)) ;
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//(1 << MOISTURE_SENSOR_A6) |
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//(1 << MOISTURE_SENSOR_A7));
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}
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void triggerRead(void) {
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readSensors = true;
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}
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int16_t moistureAverage(int8_t sensorPin) {
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int16_t sum = 0;
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for (int i = 0; i < SENSOR_READINGS; i++) {
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sum += adcRead(sensorPin);
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//TODO: implement variance check (if over a certain variance discard measurements for this cycle)
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//TODO: maybe add a small delay using watchdog here?
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//TODO IMPORTANT: if value < 1 or > 1022, discard that measurement
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}
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return sum / SENSOR_READINGS;
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}
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int16_t moistureRead(void) {
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uint8_t sensorPins[SENSORS_NUM] = { MOISTURE_SENSOR_A0, MOISTURE_SENSOR_A1,
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MOISTURE_SENSOR_A2, MOISTURE_SENSOR_A3,
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MOISTURE_SENSOR_A4, MOISTURE_SENSOR_A5 };
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//MOISTURE_SENSOR_A6, MOISTURE_SENSOR_A7 };
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int16_t overallSum = 0;
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for (int i = 0; i < SENSORS_NUM; i++) {
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int16_t sensorAverage = moistureAverage(sensorPins[i]);
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//TODO: if a sensor gives 0 or 1023, discard that sensor entirely (means it is disconnected or not working)
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overallSum += sensorAverage;
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}
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return overallSum / SENSORS_NUM;
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}
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