diff options
Diffstat (limited to 'src/app/blinkencat3/main.cc')
| -rw-r--r-- | src/app/blinkencat3/main.cc | 48 |
1 files changed, 36 insertions, 12 deletions
diff --git a/src/app/blinkencat3/main.cc b/src/app/blinkencat3/main.cc index 12c3f14..4498623 100644 --- a/src/app/blinkencat3/main.cc +++ b/src/app/blinkencat3/main.cc @@ -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 |