From dcfe43860be2daf118e81a59029a34f018926ae5 Mon Sep 17 00:00:00 2001
From: James McKenzie <git@madingley.org>
Date: Mon, 15 Dec 2014 12:10:09 +0000
Subject: fish

---
 clock.c | 182 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 182 insertions(+)
 create mode 100644 clock.c

(limited to 'clock.c')

diff --git a/clock.c b/clock.c
new file mode 100644
index 0000000..66b278b
--- /dev/null
+++ b/clock.c
@@ -0,0 +1,182 @@
+/*
+* Light_WS2812 library example - RGB_blinky
+*
+* cycles one LED through red, green, blue
+*
+* This example is configured for a ATtiny85 with PLL clock fuse set and
+* the WS2812 string connected to PB4.
+*/
+
+#include "project.h"
+
+
+#define N_COLORS (288*2)
+#define N_LEDS 24
+
+
+struct RGB led[N_LEDS];
+
+
+
+static uint32_t ticks;          /* 4 ticks per second */
+
+
+static void
+do_hand (int w, uint8_t r, uint8_t g, uint8_t b)
+{
+  int i, j;
+
+  for (i = 0; w >= 50; ++i, w -= 50);
+
+  i %= N_LEDS;
+  j = i + 1;
+  j %= N_LEDS;
+
+  led[i].r += (r * (49 - w)) / 49;
+  led[i].g += (g * (49 - w)) / 49;
+  led[i].b += (b * (49 - w)) / 49;
+
+  led[j].r += (r * w) / 49;
+  led[j].g += (g * w) / 49;
+  led[j].b += (b * w) / 49;
+
+}
+
+
+static void
+tick (void)
+{
+  uint32_t r;
+  ticks++;
+
+
+
+  if ((ticks%20)<10)  {
+  	PORTD&=~(1<<5);
+  } else {
+  	PORTD|=1<<5;
+ }
+
+
+  memset (led, 0, sizeof (led));
+
+  r = ticks % 1200;
+
+  do_hand (r, 255, 0, 0);
+
+  r = (ticks / 60) % 1200;
+
+  do_hand (r, 0, 255, 0);
+
+  r = (ticks / 720) % 1200;
+
+  
+
+  do_hand (r, 0, 0, 255);
+
+  ws2812_setleds (led, N_LEDS);
+
+}
+
+static void off(void)
+{
+  memset (led, 0, sizeof (led));
+  ws2812_setleds (led, N_LEDS);
+}
+
+int get_int(char *buf)
+{
+int r;
+
+r=buf[0]-'0';
+r*=10;
+r+=buf[1]-'0';
+
+return r;
+}
+
+
+static void command_dispatch(char *buf)
+{
+uint32_t r=ticks/20;
+int h,m,s;
+
+if ((buf[2]==':') && (buf[5]==':')) {
+	h=get_int(buf);
+	m=get_int(buf+3);
+	s=get_int(buf+6);
+
+	r=h;
+	r*=60;
+	r+=m;
+	r*=60;
+	r+=s;
+	ticks=r*20;
+}
+
+
+h=r/3600;
+r -= h*3600;
+m=r/60;
+r -= m*60;
+s=r;
+printf("%02d.%02d.%02d\n",h,m,s);
+}
+
+
+
+static void serial_dispatch(void)
+{
+static char buf[64];
+static int bptr=0;
+
+int r=usb_serial_getchar();
+if (r==-1) return;
+
+
+if (r==10) {
+	buf[bptr]=0;
+	command_dispatch(buf);
+	bptr=0;
+	return;
+}
+
+buf[bptr++]=r;
+
+if (bptr==(sizeof(buf) -1 )) {
+	bptr=0;
+	return;
+}
+}
+
+
+
+int
+main (void)
+{
+  int i, j, k;
+
+  setup_clocks ();
+  off();
+  stdio_init ();
+
+
+  DDRD|=1<<5;
+
+  ticks=0;
+  ticks*=60;
+  ticks+=30;
+  ticks*=60;
+  ticks+=15;
+  ticks*=20;
+
+
+
+
+  while (1)
+    {
+      tick ();
+      serial_dispatch();
+      _delay_ms (50);          // wait for 500ms.
+    }
+}
-- 
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