float Light::readEv()
{
float lux;
static float lastReading;
if(!initialized) return 0;
if(paused || skipTask) return lastReading;
lux = readLux();
method = 0;
float ev = libc_log2(lux);
ev *= 3;
ev += 30;
if(filterIndex < 0) // initialize buffer
{
for(uint8_t i = 0; i < FILTER_LENGTH; i++) filter[i] = ev;
filterIndex = 0;
}
else // circular buffer
{
if(filterIndex < FILTER_LENGTH - 1) filterIndex++; else filterIndex = 0;
filter[filterIndex] = ev;
}
ev = arrayMedian(filter, FILTER_LENGTH);
lastReading = ev;
return ev;
}
int8_t Light::readEv()
{
float lux;
lux = readLux();
lux *= 2^5;
method = 0;
int8_t ev = (int8_t)ilog2(lux);
ev *= 3;
ev += 30;
if(ev <= 12)
{
uint16_t tmp = hardware_readLight(2);
if(tmp < 10)
{
//if(tmp > 4) tmp -= 4; else tmp = 0;
//ev = (int8_t)ilog2(tmp);
//if(ev < 0) ev = 0;
//ev *= 3;
//ev += 3;
ev = tmp + 3;
debug(STR("Using Analog"));
method = 1;
}
}
return ev;
}
