initial cleanup and mapping

examples/clock.c

@@ -0,0 +1,201 @@
+/*
+ * clock.c:
+ *	Demo of the 128x64 graphics based LCD driver.
+ *	This is designed to drive the parallel interface LCD drivers
+ *	based on the popular 12864H controller chip.
+ *
+ *	This test program assumes the following:
+ *		(Which is currently hard-wired into the driver)
+ *
+ *	GPIO 0-7 is connected to display data pins 0-7.
+ *	GPIO 10 is CS1
+ *	GPIO 11 is CS2
+ *	GPIO 12 is STROBE
+ *	GPIO 10 is RS
+ *
+ * Copyright (c) 2012-2013 Gordon Henderson.
+ ***********************************************************************
+ * This file is part of wiringPi:
+ *	https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ *    wiringPi is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    wiringPi is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with wiringPi.  If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <time.h>
+#include <math.h>
+
+#include <wiringPi.h>
+#include <lcd128x64.h>
+
+#ifndef	TRUE
+#  define	TRUE	(1==1)
+#  define	FALSE	(1==2)
+#endif
+
+double clockRadius ;
+double thickness, barLen ;
+int maxX, maxY ;
+
+double rads (double degs)
+{
+  return degs * M_PI / 180.0 ;
+}
+
+void drawClockHands (void)
+{
+  time_t t ;
+  struct tm *now ;
+  double angle, p, x0, y0, x1, y1 ;
+  int h24, h, m, s ;
+  char text [20] ;
+
+  time (&t) ;
+  now = localtime (&t) ;
+
+  h24 = now->tm_hour ;
+  m   = now->tm_min ;
+  s   = now->tm_sec ;
+
+  h = h24 ;
+  if (h > 12)
+    h -= 12 ;
+
+// Hour hand
+
+  angle = h * 30 + m * 0.5 ;
+  x0 = sin (rads (angle)) * (clockRadius * 0.75) ;
+  y0 = cos (rads (angle)) * (clockRadius * 0.75) ;
+  for (p = -3.0 ; p <= 3.0 ; p += 0.2)
+  {
+    x1 = sin (rads (angle + p)) * (clockRadius * 0.7) ;
+    y1 = cos (rads (angle + p)) * (clockRadius * 0.7) ;
+    lcd128x64line (0, 0, x1, y1, 1) ;
+    lcd128x64lineTo (x0, y0, 1) ;
+  }
+
+// Minute hand
+
+  angle = m * 6 ;
+  x0 = sin (rads (angle)) * (clockRadius * 0.9) ;
+  y0 = cos (rads (angle)) * (clockRadius * 0.9) ;
+  for (p = -1.0 ; p <= 1.0 ; p += 0.2)
+  {
+    x1 = sin (rads (angle + p)) * (clockRadius * 0.85) ;
+    y1 = cos (rads (angle + p)) * (clockRadius * 0.85) ;
+    lcd128x64line (0, 0, x1, y1, 1) ;
+    lcd128x64lineTo (x0, y0, 1) ;
+  }
+
+// Second hand
+
+  angle = s * 6 ;
+  x0 = sin (rads (angle)) * (clockRadius * 0.2) ;
+  y0 = cos (rads (angle)) * (clockRadius * 0.2) ;
+  x1 = sin (rads (angle)) * (clockRadius * 0.95) ;
+  y1 = cos (rads (angle)) * (clockRadius * 0.95) ;
+  lcd128x64line (0 - x0, 0 - y0, x1, y1, 1) ;
+  lcd128x64circle (0, 0, clockRadius * 0.1,  0, 1) ;
+  lcd128x64circle (0, 0, clockRadius * 0.05, 1, 1) ;
+
+// Text:
+
+  sprintf (text, "%02d:%02d:%02d", h24, m, s) ;
+  lcd128x64puts (32, 24, text, 0, 1) ;
+
+  sprintf (text, "%2d/%2d/%2d", now->tm_mday, now->tm_mon + 1, now->tm_year - 100) ;
+  lcd128x64puts (32, -23, text, 0, 1) ;
+}
+
+void drawClockFace (void)
+{
+  int m ;
+  double d, px1, py1, px2, py2 ;
+
+  lcd128x64clear (0) ;
+  lcd128x64circle (0,0, clockRadius, 1, TRUE) ;
+  lcd128x64circle (0,0, clockRadius - thickness, 0, TRUE) ;
+
+// The four big indicators for 12,15,30 and 45
+
+  lcd128x64rectangle (- 3,  clockRadius - barLen, 3,  clockRadius,     1, TRUE) ;	// 12
+  lcd128x64rectangle (clockRadius - barLen, 3,  clockRadius, -3, 1, TRUE) ;	// 3
+  lcd128x64rectangle (- 3, -clockRadius + barLen, 3, -clockRadius, 1, TRUE) ;	// 6
+  lcd128x64rectangle (-clockRadius + barLen, 3, -clockRadius, -3, 1, TRUE) ;	// 9
+
+
+// Smaller 5 and 1 minute ticks
+
+  for (m = 0 ; m < 60 ; ++m)
+  {
+    px1 = sin (rads (m * 6)) * clockRadius ;
+    py1 = cos (rads (m * 6)) * clockRadius ;
+    if ((m % 5) == 0)
+      d = barLen ;
+    else 
+      d = barLen / 2.0 ;
+
+    px2 = sin (rads (m * 6)) * (clockRadius - d) ;
+    py2 = cos (rads (m * 6)) * (clockRadius - d) ;
+    lcd128x64line (px1, py1, px2, py2, 1) ;
+  }
+}
+
+void setup (void)
+{
+  lcd128x64getScreenSize (&maxX, &maxY) ;
+  clockRadius = maxY / 2 - 1 ;
+  thickness = maxX / 48 ;
+  barLen = thickness * 4 ;
+  lcd128x64setOrigin (32, 32) ;
+}
+
+
+
+
+/*
+ ***********************************************************************
+ * The main program
+ ***********************************************************************
+ */
+
+int main (int argc, char *argv [])
+{
+  time_t now ;
+
+  wiringPiSetup () ;
+
+  lcd128x64setup () ;
+
+  setup () ;
+  for (;;)
+  {
+    drawClockFace  () ;
+    drawClockHands () ;
+    lcd128x64update () ;
+
+    now = time (NULL) ;
+    while (time (NULL) == now)
+      delay (10) ;
+  }
+  
+
+  return 0 ;
+}