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#include "sns_PIR.h"
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#include "sns_PIR.h"
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#define ABS(a) ((a) < 0 ? (-1*a) : (a))
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#define ABS(a) ((a) < 0 ? (-a) : (a))
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// a weighted moving avarage value is used to remove "DC offset"
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// a weighted moving avarage value is used to remove "DC offset"
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static uint32_t zeroOffset = 0;
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static uint32_t zeroOffset = 0;
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// a second avarage value is used to detect changes in avarage "energy"
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// a second avarage value is used to detect changes in avarage "energy"
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#define NR_AVG_VALUES   15
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#define NR_AVG_VALUES   15
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static int8_t avgValues[NR_AVG_VALUES];
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static int16_t avgValues[NR_AVG_VALUES];
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static uint8_t avgIndex = 0;
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static uint8_t avgIndex = 0;
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void sns_PIR_Init(void)
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void sns_PIR_Init(void)
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{
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{
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}
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}
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void sns_PIR_Process(void)
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void sns_PIR_Process(void)
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{
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{
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    uint8_t motionDetect;
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    static uint8_t motionDetect = 0;
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    uint16_t brightness;
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    uint16_t brightness;
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    if (Timer_Expired(sns_PIR_SAMPLE_TIMER)) {
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    if (Timer_Expired(sns_PIR_SAMPLE_TIMER)) {
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        /**
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        /**
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         * Read PIR sensor (via external ADC)
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         * Read PIR sensor (via external ADC)
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         */
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         */
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        /* Or to keep motiondetect==1 true for at least one CAN send period, so detections are never lost */
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        /* Or to keep motiondetect==1 true for at least one CAN send period, so detections are never lost */
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        motionDetect |= (avgValue >= 80);
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        motionDetect |= (avgValue >= 80);
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    }
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    }
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    else if (Timer_Expired(sns_PIR_SEND_TIMER)) {
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    if (Timer_Expired(sns_PIR_SEND_TIMER)) {
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        /**
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        /**
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         * Read brightness sensor (via internal ADC).
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         * Read brightness sensor (via internal ADC).
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         */
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         */
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        brightness = ADC_Get(sns_PIR_BRIGHTNESS_AD);
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        brightness = ADC_Get(sns_PIR_BRIGHTNESS_AD);
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