1 /*
2 * Author: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
3 * Copyright (c) 2015 Intel Corporation.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include "tm1637.h"
26 #include <signal.h>
27 #include <unistd.h>
28 #include <sstream>
29 #include <time.h>
30
31 using namespace std;
32 using namespace upm;
33
34 bool run = true;
35
sig_handler(int signo)36 void sig_handler(int signo)
37 {
38 if (signo == SIGINT)
39 run = false;
40 }
41
42 int
main(int argc,char ** argv)43 main(int argc, char** argv)
44 {
45 //! [Interesting]
46 bool point = true;
47 int timezone = -7; // Your UTC offset
48 time_t rawtime;
49 struct tm * gmt;
50 char myTime[5];
51
52 fprintf(stdout, "TM1637 Display Example\n");
53 signal(SIGINT, sig_handler);
54
55 TM1637 myDisplay = TM1637(0, 1); // TM1637 on pins 0 (clk) and 1 (dio)
56 myDisplay.write(0x39, 0x09, 0x09); // Start a box using 7-segment encoding
57 myDisplay.writeAt(3, ']'); // Finish box using writeAt function
58 sleep(3); // Wait 3 seconds
59
60 while(run)
61 {
62 time(&rawtime); // Update raw time
63 gmt = gmtime(&rawtime); // Get current time
64
65 int hour = (gmt) ? gmt->tm_hour : 0;
66 int min = (gmt) ? gmt->tm_min : 0;
67 // Format and store the time in 24 hour format
68 snprintf(myTime, 5, "%2d%02d", (hour + timezone + 24) % 24, min);
69
70 myDisplay.write(myTime); // Write to display as string
71 myDisplay.setColon(point ^= true); // Toggle the dots on the display
72 sleep(1); // Only update once every second
73 }
74
75 //! [Interesting]
76 return 0;
77 }
78
79
80