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-rw-r--r--src/app/ws2812b_uart/Makefile.inc2
-rw-r--r--src/app/ws2812b_uart/main.cc202
2 files changed, 204 insertions, 0 deletions
diff --git a/src/app/ws2812b_uart/Makefile.inc b/src/app/ws2812b_uart/Makefile.inc
new file mode 100644
index 0000000..ce0a386
--- /dev/null
+++ b/src/app/ws2812b_uart/Makefile.inc
@@ -0,0 +1,2 @@
+loop ?= 1
+arch_drivers += ,stdin,neopixel
diff --git a/src/app/ws2812b_uart/main.cc b/src/app/ws2812b_uart/main.cc
new file mode 100644
index 0000000..0becbf9
--- /dev/null
+++ b/src/app/ws2812b_uart/main.cc
@@ -0,0 +1,202 @@
+#include "arch.h"
+#include "driver/neopixel.h"
+#include "driver/stdin.h"
+#include "driver/stdout.h"
+#include <util/delay.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/wdt.h>
+
+#define NUM_PIXELS 66
+
+Adafruit_NeoPixel np(NUM_PIXELS, GPIO::pb0, NEO_GRB+NEO_KHZ800);
+
+class Blinkencat {
+ public:
+ enum Mode : uint8_t {
+ OFF = 0,
+ RGBWHEEL_FAST,
+ RGBWHEEL_SLOW,
+ RGBFADE_FAST,
+ RGBFADE_SLOW,
+ BRIGHTRGBWHEEL_FAST,
+ BRIGHTRGBWHEEL_SLOW,
+ BRIGHTRGBFADE_FAST,
+ BRIGHTRGBFADE_SLOW,
+ COLD_WHITE,
+ STROBE,
+ COLOR_STROBE,
+ MODE_ENUM_MAX
+ };
+
+ Mode mode;
+
+ void setup(void);
+ void next_mode(void);
+ void idle(void);
+ void loop(void);
+
+ Blinkencat() : mode(RGBWHEEL_SLOW) {}
+};
+
+void Blinkencat::setup(void)
+{
+ np.setup();
+ gpio.input(GPIO::pb1, 0);
+ gpio.input(GPIO::pd3, 1);
+ gpio.enable_int(GPIO::pd3);
+
+ // One ADC conversion per four seconds
+ TCCR1A = 0;
+ TCCR1B = _BV(CS12) | _BV(CS10);
+
+ // Measure internal 1.1V bandgap using VCC as reference on each Timer 1 overflow
+ ADMUX = _BV(REFS0) | 0x0e;
+ ADCSRB = _BV(ADTS2) | _BV(ADTS1);
+ ADCSRA = _BV(ADEN) | _BV(ADATE) | _BV(ADPS2) | _BV(ADPS1);
+}
+
+void Blinkencat::idle(void)
+{
+ SMCR = _BV(SE);
+ asm("sleep");
+ SMCR = 0;
+}
+
+void Blinkencat::next_mode(void)
+{
+ mode = (Mode)((mode + 1) % MODE_ENUM_MAX);
+}
+
+void Blinkencat::loop(void)
+{
+ static uint16_t rgbwheel_offset = 0;
+ 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
+ // been handled immediately after an np.show() call. So we must
+ // observe the 300us idle time mandated by WS2812.
+ _delay_ms(1);
+ for (uint16_t i = 0; i < NUM_PIXELS; i++) {
+ np.setPixelColor(i, np.Color(0, 0, 0));
+ }
+ np.show();
+ idle();
+ break;
+ case RGBWHEEL_FAST:
+ case RGBWHEEL_SLOW:
+ for (uint16_t i = 0; i < NUM_PIXELS; i++) {
+ uint16_t hsv = (i * 252 + rgbwheel_offset) % 6553;
+ np.setPixelColor((NUM_PIXELS-1) - i, np.gamma32(np.ColorHSV(hsv * 10, 255, 127)));
+ }
+ rgbwheel_offset = (rgbwheel_offset + 10) % 6553;
+ np.show();
+ _delay_ms(1);
+ if (mode == RGBWHEEL_SLOW) {
+ _delay_ms(9);
+ }
+ break;
+ case RGBFADE_FAST:
+ case RGBFADE_SLOW:
+ for (uint16_t i = 0; i < NUM_PIXELS; i++) {
+ np.setPixelColor(i, np.ColorHSV(rgbfade_hsv * 10, 255, 63));
+ }
+ rgbfade_hsv = (rgbfade_hsv + 10) % 6553;
+ np.show();
+ _delay_ms(1);
+ if (mode == RGBFADE_SLOW) {
+ _delay_ms(99);
+ }
+ break;
+ case BRIGHTRGBWHEEL_FAST:
+ case BRIGHTRGBWHEEL_SLOW:
+ for (uint16_t i = 0; i < NUM_PIXELS; i++) {
+ uint16_t hsv = (i * 252 + rgbwheel_offset) % 6553;
+ np.setPixelColor((NUM_PIXELS-1) - i, np.gamma32(np.ColorHSV(hsv * 10)));
+ }
+ rgbwheel_offset = (rgbwheel_offset + 10) % 6553;
+ np.show();
+ _delay_ms(1);
+ if (mode == BRIGHTRGBWHEEL_SLOW) {
+ _delay_ms(9);
+ }
+ break;
+ case BRIGHTRGBFADE_FAST:
+ case BRIGHTRGBFADE_SLOW:
+ for (uint16_t i = 0; i < NUM_PIXELS; i++) {
+ np.setPixelColor(i, np.ColorHSV(rgbfade_hsv * 10));
+ }
+ rgbfade_hsv = (rgbfade_hsv + 10) % 6553;
+ np.show();
+ _delay_ms(1);
+ if (mode == BRIGHTRGBFADE_SLOW) {
+ _delay_ms(99);
+ }
+ break;
+ case COLD_WHITE:
+ for (uint16_t i = 0; i < NUM_PIXELS; i++) {
+ np.setPixelColor(i, np.Color(127, 127, 127));
+ }
+ np.show();
+ idle();
+ break;
+ case STROBE:
+ for (uint16_t i = 0; i < NUM_PIXELS; i++) {
+ np.setPixelColor(i, np.Color(strobe_on, strobe_on, strobe_on));
+ }
+ np.show();
+ strobe_on = 127 - strobe_on;
+ _delay_ms(40);
+ break;
+ case COLOR_STROBE:
+ for (uint16_t i = 0; i < NUM_PIXELS; i++) {
+ if (strobe_on) {
+ np.setPixelColor(i, np.ColorHSV(rgbfade_hsv * 10));
+ } else {
+ np.setPixelColor(i, np.Color(0, 0, 0));
+ }
+ }
+ rgbfade_hsv = (rgbfade_hsv + 50) % 6553;
+ np.show();
+ strobe_on = 127 - strobe_on;
+ _delay_ms(40);
+ break;
+ }
+}
+
+Blinkencat blinkencat;
+
+int main(void)
+{
+ arch.setup();
+ gpio.setup();
+ kout.setup();
+ kin.setup();
+
+ blinkencat.setup();
+
+ while (1) {
+ blinkencat.loop();
+ while (kin.hasKey()) {
+ char key = kin.getKey();
+ if ((key >= '0') && (key < '0' + blinkencat.MODE_ENUM_MAX)) {
+ blinkencat.mode = (Blinkencat::Mode)(key - '0');
+ }
+ }
+ }
+
+ return 0;
+}