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User talk:Daveb: Difference between revisions
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→firmware design: new section
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Plans for cooling of LEDs are still vaugue. | Plans for cooling of LEDs are still vaugue. | ||
== firmware design == | |||
isr(int0) | |||
{ | |||
freq++ ; | |||
} | |||
isr(counter_2_overflow) | |||
{ | |||
// copy current freq to main line, reset freq. | |||
} | |||
isr(adc_complete) | |||
{ | |||
copy adc value to mainline; | |||
} | |||
isr(counter1_...) | |||
{ | |||
// implement the lighting policy | |||
?flip the current MOSFETs bit.. | |||
?change the current MOSFET | |||
?change the counter target | |||
} | |||
main() | |||
{ | |||
setup() ; // set the ports, direction etc. | |||
for(;;) | |||
{ | |||
if (newFreq) | |||
{ | |||
{ | |||
DISABLE_ISR ; | |||
copy new freq ; | |||
} | |||
if new freq != old freq | |||
adjust policy; | |||
} | |||
if (newLumons) | |||
{ | |||
{ | |||
DISABLE_ISR; | |||
copy new lumons; | |||
} | |||
if new lumons != old lumons | |||
adjust policy ; | |||
} | |||
} | |||
policy ideas. | |||
1) if it is dark provide light ASAP. | |||
2) if it be comes light, wait for a bit to confim it stays light, and thn start flashing the lights to provide visiblity | |||
3) as the speed increases, spend more time with tight focussed lights illuminated | |||
4) as the speed decreases, spend more time with flood lights illuminated. | |||
5) match the power available to the power cunsumed by the LED strings | |||
policy mechanism | |||
four intervals of variable length, for variable strings | |||
off, string-a on, off, string-b on | |||
defined as char counter[4], value[4]; | |||
will allow the fading from spots to floods gradually:). | |||
will allow the spots to be flashed at 10% duty cycle at a low speed during the day, intermingled with a 20% flash from the lower power medium floods... | |||
policy config. | |||
night vs day lumonosity value. | |||
samples of day light required for flashing to start. | |||
freq exponential smoothing factor (power of 2) | |||
night freq bounds[4] between {floods | mix | medium | mix | spots} | |||
day freq bounds[4] | |||
