mbed Starter Kit / mbed Starter Kit Demo Programs

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internet_clock/main.cpp@0:6a73d3dc037e, 2014-07-28 (annotated)

Committer:
ShawnHymel
Date:
Mon Jul 28 20:29:28 2014 +0000
Revision:
0:6a73d3dc037e
Added main.cpp files from each of the demo programs. Libraries are not included.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ShawnHymel 0:6a73d3dc037e 1 // Internet Clock with LCD based on the work by Jim Hamblen and Tyler Lisowski
ShawnHymel 0:6a73d3dc037e 2
ShawnHymel 0:6a73d3dc037e 3 #include "mbed.h"
ShawnHymel 0:6a73d3dc037e 4 #include "EthernetInterface.h"
ShawnHymel 0:6a73d3dc037e 5 #include "NTPClient.h"
ShawnHymel 0:6a73d3dc037e 6 #include "uLCD_4DGL.h"
ShawnHymel 0:6a73d3dc037e 7
ShawnHymel 0:6a73d3dc037e 8 // Parameters
ShawnHymel 0:6a73d3dc037e 9 char* domain_name = "0.uk.pool.ntp.org";
ShawnHymel 0:6a73d3dc037e 10 int port_number = 123;
ShawnHymel 0:6a73d3dc037e 11
ShawnHymel 0:6a73d3dc037e 12 // Networking
ShawnHymel 0:6a73d3dc037e 13 EthernetInterface eth;
ShawnHymel 0:6a73d3dc037e 14 NTPClient ntp_client;
ShawnHymel 0:6a73d3dc037e 15
ShawnHymel 0:6a73d3dc037e 16 // Graphic LCD - TX, RX, and RES pins
ShawnHymel 0:6a73d3dc037e 17 uLCD_4DGL uLCD(p9,p10,p11);
ShawnHymel 0:6a73d3dc037e 18
ShawnHymel 0:6a73d3dc037e 19 int main() {
ShawnHymel 0:6a73d3dc037e 20
ShawnHymel 0:6a73d3dc037e 21 time_t ct_time;
ShawnHymel 0:6a73d3dc037e 22 char time_buffer[80];
ShawnHymel 0:6a73d3dc037e 23
ShawnHymel 0:6a73d3dc037e 24 // Initialize LCD
ShawnHymel 0:6a73d3dc037e 25 uLCD.baudrate(115200);
ShawnHymel 0:6a73d3dc037e 26 uLCD.background_color(BLACK);
ShawnHymel 0:6a73d3dc037e 27 uLCD.cls();
ShawnHymel 0:6a73d3dc037e 28
ShawnHymel 0:6a73d3dc037e 29 // Connect to network and wait for DHCP
ShawnHymel 0:6a73d3dc037e 30 uLCD.locate(0,0);
ShawnHymel 0:6a73d3dc037e 31 uLCD.printf("Getting IP Address\n");
ShawnHymel 0:6a73d3dc037e 32 eth.init();
ShawnHymel 0:6a73d3dc037e 33 if ( eth.connect() == -1 ) {
ShawnHymel 0:6a73d3dc037e 34 uLCD.printf("ERROR: Could not\nget IP address");
ShawnHymel 0:6a73d3dc037e 35 return -1;
ShawnHymel 0:6a73d3dc037e 36 }
ShawnHymel 0:6a73d3dc037e 37 uLCD.printf("IP address is \n%s\n\n",eth.getIPAddress());
ShawnHymel 0:6a73d3dc037e 38 wait(1);
ShawnHymel 0:6a73d3dc037e 39
ShawnHymel 0:6a73d3dc037e 40 // Read time from server
ShawnHymel 0:6a73d3dc037e 41 uLCD.printf("Reading time...\n\r");
ShawnHymel 0:6a73d3dc037e 42 ntp_client.setTime(domain_name, port_number);
ShawnHymel 0:6a73d3dc037e 43 uLCD.printf("Time set\n");
ShawnHymel 0:6a73d3dc037e 44 wait(2);
ShawnHymel 0:6a73d3dc037e 45 eth.disconnect();
ShawnHymel 0:6a73d3dc037e 46
ShawnHymel 0:6a73d3dc037e 47 // Reset LCD
ShawnHymel 0:6a73d3dc037e 48 uLCD.background_color(WHITE);
ShawnHymel 0:6a73d3dc037e 49 uLCD.textbackground_color(WHITE);
ShawnHymel 0:6a73d3dc037e 50 uLCD.color(RED);
ShawnHymel 0:6a73d3dc037e 51 uLCD.cls();
ShawnHymel 0:6a73d3dc037e 52 uLCD.text_height(2);
ShawnHymel 0:6a73d3dc037e 53
ShawnHymel 0:6a73d3dc037e 54 // Loop and update clock
ShawnHymel 0:6a73d3dc037e 55 while (1) {
ShawnHymel 0:6a73d3dc037e 56 uLCD.locate(0, 1);
ShawnHymel 0:6a73d3dc037e 57 ct_time = time(NULL);
ShawnHymel 0:6a73d3dc037e 58 strftime(time_buffer, 80, " %a %b %d\n %T %p %z\n %Z\n", \
ShawnHymel 0:6a73d3dc037e 59 localtime(&ct_time));
ShawnHymel 0:6a73d3dc037e 60 uLCD.printf(" UTC/GMT:\n%s", time_buffer);
ShawnHymel 0:6a73d3dc037e 61 wait(0.1);
ShawnHymel 0:6a73d3dc037e 62 }
ShawnHymel 0:6a73d3dc037e 63 }