25 Commits

Author	SHA1	Message	Date
Stuart Longland	fe8520116f	powerctl: Drop solar presence check. ... At night, we probably don't want to just hammer the batteries with 14.4V all the time. If we switch to "solar mode", that'll give the batteries a bit of a break from the charger.	2018-10-01 10:07:17 +10:00
Stuart Longland	27612b9173	powerctl: Split out core loop functions. ... This just tries to make things a bit more readable by reducing the depth of indentation, as per guidance in the Linux kernel style documentation.	2018-09-22 14:38:32 +10:00
Stuart Longland	caf3e27565	Drop UART support. ... Not being used, and bitrotten.	2018-09-22 14:26:26 +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	3f0aff5a00	powerctl: Switch to mains at sunset. ... Rather than just waiting for the battery to reach rock bottom or for the solar override to force the mains charger on.	2018-09-17 22:51:10 +10:00
Stuart Longland	03161f8d8e	powerctl: Re-work controller logic.	2018-09-17 22:51:00 +10:00
Stuart Longland	723d226399	powerctl: Use ADC units not MV	2017-03-19 13:22:32 +10:00
Stuart Longland	4a87ef25a4	powerctl: Implement V_DELTA_MV checks.	2017-03-19 12:56:02 +10:00
Stuart Longland	8a27a8df8f	powerctl: Don't change warning state in check. ... Doing so causes flapping that is unable to be resolved by timers.	2017-03-19 12:36:45 +10:00
Stuart Longland	c2e6915996	powerctl: Wait until t_cwarn expiry before clearing timer.	2017-03-19 12:24:13 +10:00
Stuart Longland	3969248610	powerctl: In CHARGE_WAIT state, reset if battery improving.	2017-03-19 11:23:57 +10:00
Stuart Longland	97d4732c6c	powerctl: Implement warning timer.	2017-03-19 10:59:33 +10:00
Stuart Longland	10cf0c710a	powerctl: Re-locate WARNING LED update.	2017-03-19 10:15:51 +10:00
Stuart Longland	5fe8ce3d74	powerctl: Revert t_adc to being a tick timer. ... Rather than counting seconds, count ticks, so we can set sub-second ADC samples.	2017-03-19 09:41:41 +10:00
Stuart Longland	a5031f0403	powerctl: Tweak warning LED usage. ... Show a warning when charging and the battery voltage is *not* increasing.	2017-03-19 09:28:55 +10:00
Stuart Longland	511309aa74	powerctl: Create one-second timer ... This creates a one-second timing event from the high-frequency timer for less frequent events so we don't have to keep ticking down larger numbers.	2017-03-18 15:44:48 +10:00
Stuart Longland	c29736ca86	powerctl: Fix some debug typos	2017-03-18 15:22:35 +10:00
Stuart Longland	3db2e03807	powerctl: Re-locate high-voltage threshold check. ... If the charger is doing a bulk charge, it'll likely be dumping high current into the battery, resulting in a high voltage appearing at the terminals. We don't want to disturb this… we want to wait until the charger thinks it's done, which it signifies by turning off. We should see the voltage drop back and continue falling. If we're above our "high" threshold at this point, *then* we might consider leaving it off.	2017-03-18 14:04:12 +10:00
Stuart Longland	312d21c01c	powerctl: Re-write battery charge control logic. ... See doc/flowdiag.png and https://hackaday.io/project/10529-solar-powered-cloud-computing/log/54762-charge-control-flow-control-diagram for details on how this new logic is supposed to work.	2017-03-12 15:47:39 +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
Stuart Longland	772d5b9d30	FAN control: Fine-tune minimum PWM ... It appears the minimum PWM is more strongly dependent on battery voltage than I had planned, it needs to be just a little higher to ensure the fan keeps turning at low RPM.	2016-09-04 06:47:28 +10:00
Stuart Longland	e62cbf497a	fan PWM tweaks. ... - Adjust the calculations so that we base our initial PWM at 0 then clamp to minimum PWM - Implement a fan kick-start mode - Start with fan off so kick-start mode works	2016-09-04 06:30:52 +10:00
Stuart Longland	882541392f	Initial check-in	2016-09-03 17:31:15 +10:00