William Ye / Mbed 2 deprecated internet_clock

internet clock via ethernet cable

Dependencies:   4DGL-uLCD-SE EthernetInterface NTPClient mbed-rtos mbed

main.cpp@0:80d83068b7bd, 2016-01-30 (annotated)

Committer:
wye11
Date:
Sat Jan 30 07:33:17 2016 +0000
Revision:
0:80d83068b7bd
internet clock via ethernet;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wye11 0:80d83068b7bd 1 // Internet Clock with LCD based on the work by Jim Hamblen and Tyler Lisowski
wye11 0:80d83068b7bd 2
wye11 0:80d83068b7bd 3 #include "mbed.h"
wye11 0:80d83068b7bd 4 #include "EthernetInterface.h"
wye11 0:80d83068b7bd 5 #include "NTPClient.h"
wye11 0:80d83068b7bd 6 #include "uLCD_4DGL.h"
wye11 0:80d83068b7bd 7
wye11 0:80d83068b7bd 8 // Parameters
wye11 0:80d83068b7bd 9 char* domain_name = "0.uk.pool.ntp.org";
wye11 0:80d83068b7bd 10 int port_number = 123;
wye11 0:80d83068b7bd 11
wye11 0:80d83068b7bd 12 // Networking
wye11 0:80d83068b7bd 13 EthernetInterface eth;
wye11 0:80d83068b7bd 14 NTPClient ntp_client;
wye11 0:80d83068b7bd 15
wye11 0:80d83068b7bd 16 // Graphic LCD - TX, RX, and RES pins
wye11 0:80d83068b7bd 17 uLCD_4DGL uLCD(p9,p10,p11);
wye11 0:80d83068b7bd 18
wye11 0:80d83068b7bd 19 int main() {
wye11 0:80d83068b7bd 20
wye11 0:80d83068b7bd 21 time_t ct_time;
wye11 0:80d83068b7bd 22 char time_buffer[80];
wye11 0:80d83068b7bd 23
wye11 0:80d83068b7bd 24 // Initialize LCD
wye11 0:80d83068b7bd 25 uLCD.baudrate(115200);
wye11 0:80d83068b7bd 26 uLCD.background_color(BLACK);
wye11 0:80d83068b7bd 27 uLCD.cls();
wye11 0:80d83068b7bd 28
wye11 0:80d83068b7bd 29 // Connect to network and wait for DHCP
wye11 0:80d83068b7bd 30 uLCD.locate(0,0);
wye11 0:80d83068b7bd 31 uLCD.printf("Getting IP Address\n");
wye11 0:80d83068b7bd 32 eth.init();
wye11 0:80d83068b7bd 33 if ( eth.connect() == -1 ) {
wye11 0:80d83068b7bd 34 uLCD.printf("ERROR: Could not\nget IP address");
wye11 0:80d83068b7bd 35 return -1;
wye11 0:80d83068b7bd 36 }
wye11 0:80d83068b7bd 37 uLCD.printf("IP address is \n%s\n\n",eth.getIPAddress());
wye11 0:80d83068b7bd 38 wait(1);
wye11 0:80d83068b7bd 39
wye11 0:80d83068b7bd 40 // Read time from server
wye11 0:80d83068b7bd 41 uLCD.printf("Reading time...\n\r");
wye11 0:80d83068b7bd 42 ntp_client.setTime(domain_name, port_number);
wye11 0:80d83068b7bd 43 uLCD.printf("Time set\n");
wye11 0:80d83068b7bd 44 wait(2);
wye11 0:80d83068b7bd 45 eth.disconnect();
wye11 0:80d83068b7bd 46
wye11 0:80d83068b7bd 47 // Reset LCD
wye11 0:80d83068b7bd 48 uLCD.background_color(WHITE);
wye11 0:80d83068b7bd 49 uLCD.textbackground_color(WHITE);
wye11 0:80d83068b7bd 50 uLCD.color(RED);
wye11 0:80d83068b7bd 51 uLCD.cls();
wye11 0:80d83068b7bd 52 uLCD.text_height(2);
wye11 0:80d83068b7bd 53
wye11 0:80d83068b7bd 54 // Loop and update clock
wye11 0:80d83068b7bd 55 while (1) {
wye11 0:80d83068b7bd 56 uLCD.locate(0, 1);
wye11 0:80d83068b7bd 57 ct_time = time(NULL);
wye11 0:80d83068b7bd 58 strftime(time_buffer, 80, " %a %b %d\n %T %p %z\n %Z\n", \
wye11 0:80d83068b7bd 59 localtime(&ct_time));
wye11 0:80d83068b7bd 60 uLCD.printf(" UTC/GMT:\n%s", time_buffer);
wye11 0:80d83068b7bd 61 wait(0.1);
wye11 0:80d83068b7bd 62 }
wye11 0:80d83068b7bd 63 }