18 Commits

Author	SHA1	Message	Date
Stuart Longland	037f3a16d6	setpoints: Drop solar to 4V, battery to 12.75V ... Reduce the solar threshold so that we're at the point where the SSR can work properly. i.e. we're at first light. The battery can discharge for an hour or two at this point, which will give it a break from the charger just before sunrise. This may trigger the other charge controller to charge the battery during the day. Drop the battery voltage just a fraction so we are past the "knee" of the discharge curve at 12.8V.	2018-10-01 10:08:46 +10:00
Stuart Longland	e87ea6a0b8	setpoints: Drop solar voltage threshold.	2018-09-27 08:48:01 +10:00
Stuart Longland	a7c86401e7	powerctl.c: Re-Add LED blinking ... Before when blinking LEDs I just XORed a bit-mask, that turns out to be unwise as they blinked out of phase which was just annoying, but it is still useful to have that "flashing" state to draw your attention to a problem or to indicate a state. - We use a single 8-bit register to hold things like the blink phase (which is XORed each cycle), and whether we have checked the ADCs. - Temperature LEDs blink when fan is in "kick-start" state. - Battery voltage LED now has three states: - On: battery is above minimum voltage (good) - Off: battery is low - Blinking: battery is critical (bad) - In "solar" mode, mains charger LED will blink if we are in the "waiting for low voltage timeout" sub-state.	2018-09-22 14:23:00 +10:00
Stuart Longland	d6f926fae9	powerctl.c, setpoints.h: Tweak the state machine. ... - Re-introduce the "critically low" threshold which kick-starts the charger immediately (like the "low" threshold does now). - Add a charging time so we consider the charger to be "charging" for `T_CHARGE_S` seconds, then check to see the battery has reached the float voltage. - Delay starting the charger until the battery has been low for `T_LOW_S` seconds to prevent the charger flapping in and out. - Re-work the state machines so charging and discharging uses the same timer.	2018-09-22 13:50:33 +10:00
Stuart Longland	d33c69e80d	setpoints.h: Fine tune setpoints. ... - Drop the minimum voltage down a touch so we're not flapping the mains charger in unnecessarily. - Halve the boost time so that the sun has a better chance of keeping the battery up.	2018-09-22 12:30:53 +10:00
Stuart Longland	7e9520db3a	setpoints: Tweak solar and battery thresholds. ... Raise battery minimum voltage threshold to account for inaccuracy in the ADC readings (which can be as much as 500mV). Lower the solar threshold so that it doesn't flap when clouds pass over.	2018-09-17 22:52:13 +10:00
Stuart Longland	03161f8d8e	powerctl: Re-work controller logic.	2018-09-17 22:51:00 +10:00
Stuart Longland	dd0f371b7c	setpoints: Tweak default set points. ... - Thermal setpoint: the SOIC version of the microcontroller reads a little higher than the DIP version, so make it a little more forgiving. - Delta voltage can be a more forgiving too.	2017-03-19 14:52:57 +10:00
Stuart Longland	87d76972df	setpoints: Define an increment step to provide hysteresis. ... By incrementing the battery voltage on compare, we ensure we are seeing a steadily increasing voltage. If we're not seeing that, then we flag the warning.	2017-03-19 12:54:25 +10:00
Stuart Longland	dec958e9ca	setpoints: Swap timeouts around. ... Got high and low frequency swapped, whoopsie!	2017-03-19 11:14:36 +10:00
Stuart Longland	0e58231224	setpoints: Add warning timeout. ... If the charge isn't rising, we should wait before acting on it in case it is temporary in nature. It was hoped that the charger delay should be enough, but it seems it still can flap. We reset the warning if we see an improvement, or let the timer expire if we don't.	2017-03-19 10:57:39 +10:00
Stuart Longland	cdb3bb6349	setpoints: Re-name constants to reflect new units, tweak values.	2017-03-19 09:41:23 +10:00
Stuart Longland	a427edff38	setpoints: Rename constants for consistency	2017-03-12 15:47:22 +10:00
Stuart Longland	5c57cd27ae	setpoints: Cosmetics	2017-03-12 14:40:20 +10:00
Stuart Longland	82eaf94aef	setpoints: Re-adjust setpoint definitions. ... - Define timeouts in milliseconds for portability - Define voltages using symbols in design documentation	2017-03-12 14:33:15 +10:00
Stuart Longland	301c9a9d43	Lengthen some timeouts. ... We seem to be a bit too impatient waiting for the mains charger to kick in, and too hasty for the fan.	2016-11-05 17:04:45 +10:00
Stuart Longland	d29d15308b	Add shutdown delay on "high" threshold. ... We should delay our shutdown in case the charger decides to ramp down itself. Otherwise we can get the situation where a smart charger starts high, tripping the high threshold immediately, leading to the controller and charger oscillating between on and off.	2016-11-05 17:04:05 +10:00
Stuart Longland	d91ec8d786	Move setpoint definitions to separate header. ... This will get copied over to setpoints.h, where the developer can customise them. If they do so, and I have to change things, the Makefile will warn them of this.	2016-09-04 06:57:36 +10:00