From ba8ad0d9fa4ba7786c97c6ec991c123a65e23b59 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Martin=20Mare=C5=A1?= <mj@ucw.cz>
Date: Sun, 21 Dec 2025 21:54:34 +0100
Subject: [PATCH] X-mas: WIP

---
 xmas-lights/firmware/main.c | 51 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 50 insertions(+), 1 deletion(-)

diff --git a/xmas-lights/firmware/main.c b/xmas-lights/firmware/main.c
index 2cb17f2..4db811b 100644
--- a/xmas-lights/firmware/main.c
+++ b/xmas-lights/firmware/main.c
@@ -394,6 +394,52 @@ static void usb_init(void)
 	usb_event_pending = 1;
 }
 
+/*** Effects ***/
+
+#if 0
+
+static void effect(void)
+{
+	static u32 last_update = 0;
+	static byte b = 0;
+
+	if (ms_ticks - last_update < 30)
+		return;
+	last_update = ms_ticks;
+
+#define DIM 15/16
+	for (uint j=0; j < NPIX_NUM_LEDS; j++)
+		neopixel_set(j, neopixel_leds[j][0]*DIM, neopixel_leds[j][1]*DIM, neopixel_leds[j][2]*DIM);
+	neopixel_set(b, 0, 0, 255);
+	neopixel_set((b + NPIX_NUM_LEDS/3) % NPIX_NUM_LEDS, 0, 255, 0);
+	neopixel_set((b + 2*NPIX_NUM_LEDS/3) % NPIX_NUM_LEDS, 255, 0, 0);
+	b = (b + 1) % NPIX_NUM_LEDS;
+}
+
+#else
+
+static void effect(void)
+{
+	static u32 last_update = 0;
+	static byte b = 0;
+
+	if (ms_ticks - last_update < 60)
+		return;
+	last_update = ms_ticks;
+
+// #define DIM 1/2
+#define DIM 0
+	for (uint j=0; j < NPIX_NUM_LEDS; j++)
+		neopixel_set(j, neopixel_leds[j][0]*DIM, neopixel_leds[j][1]*DIM, neopixel_leds[j][2]*DIM);
+	for (uint k=0; k<NPIX_NUM_LEDS/20; k++) {
+		neopixel_set((b + 20*k) % NPIX_NUM_LEDS, 0, 255, 0);
+		neopixel_set((b + 20*k + 5) % NPIX_NUM_LEDS, 0, 255, 0);
+	}
+	b = (b + 1) % NPIX_NUM_LEDS;
+}
+
+#endif
+
 /*** Main ***/
 
 int main(void)
@@ -407,19 +453,22 @@ int main(void)
 
 	debug_printf("Hello, world!\n");
 
-	uint i=0;
 	u32 last_blink = 0;
 
 	for (;;) {
 		if (ms_ticks - last_blink >= 100) {
 			last_blink = ms_ticks;
 			debug_led_toggle();
+#if 0
 			if (!got_first_message) {
+				static uint i;
 				neopixel_set(i, 0, 0, 7);
 				i = (i+1) % NPIX_NUM_LEDS;
 				neopixel_set(i, 0, 255, 0);
 			}
+#endif
 		}
+		effect();
 		if (usb_event_pending) {
 			usbd_poll(usbd_dev);
 			usb_event_pending = 0;
-- 
2.47.3