Commit d3f4eef9 authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

blinkencat3: turn off LEDs when charging

parent f75f7840

src/app/blinkencat3/Makefile.inc

+2 −1
Original line number Diff line number Diff line 
loop ?= 1
 
override loop = 1

override arch_drivers += ,neopixel

src/app/blinkencat3/main.cc

+36 −12
Original line number Diff line number Diff line
@@ -48,8 +48,8 @@ class Blinkencat { 
void Blinkencat::setup(void)

{

	np.setup();

	gpio.input(GPIO::pb1, 0);

	gpio.input(GPIO::pd3, 1);

	gpio.input(GPIO::pb1, 0); // LED GND (LED has no resistor, do not set to output!)

	gpio.input(GPIO::pd3, 1); // Button A

	gpio.enable_int(GPIO::pd3);



	// One ADC conversion per four seconds
@@ -135,6 +135,40 @@ void Blinkencat::check_battery(void) 
			np.show();

			sleep();

		}



		/*

		 * Both battery and Arduino Nano are connected to the output of the

		 * TP4056 LiIon charge controller, so it decides on the battery charge

		 * status based on their cumulative current draw. A sufficiently high

		 * Arduino Nano (WS2812B) current will cause it to charge indefinitely,

		 * shortening the LiIon battery's life span and increasing fire risk.

		 *

		 * To avoid this, we disable all LEDs when a charger is connected.

		 * This is preceeded by a 5x green flash to indicate that it is

		 * intended behaviour.

		 *

		 * VCC > 4.22 V indicates that the battery is charging.

		 * (float voltage without charger rarely exceeds 4.2 V)

		 */

		if (vcc > 4220) {

			for (uint8_t i = 0; i < 5; i++) {

				for (uint8_t i = 0; i < NUM_PIXELS; i++) {

					np.setPixelColor(i, np.Color(0, 0, 0));

				}

				np.show();

				_delay_ms(400);

				for (uint8_t i = 0; i < NUM_PIXELS; i++) {

					np.setPixelColor(i, np.Color(0, 200 * ((i % 7) == 0), 0));

				}

				np.show();

				_delay_ms(400);

			}

			for (uint8_t i = 0; i < NUM_PIXELS; i++) {

				np.setPixelColor(i, np.Color(0, 0, 0));

			}

			np.show();

			sleep();

		}

	}

}
@@ -144,16 +178,6 @@ void Blinkencat::loop(void) 
	static uint16_t rgbfade_hsv = 0;

	static uint8_t strobe_on = 0;



	/*

	// not working due to bad logic levels

	if (gpio.read(GPIO::pb1)) {

		// Arduino and WS2812 strip are connected in parallel with the battery,

		// which will significantly confuse the charging circuit when the

		// strip is active while charging. So we make sure that it isn't.

		mode = OFF;

	}

	*/



	switch (mode) {

		case OFF:

			// the mode may have been set by an ISR, which may in turn have