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- /*
- * 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://github.com/WiringPi/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", (uint8_t)now->tm_mday, (uint8_t)now->tm_mon + 1, (uint8_t)(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)
- delayMs(10) ;
- }
-
- return 0 ;
- }
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