Diff: internet_clock/main.cpp

Revision:

0:6a73d3dc037e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/internet_clock/main.cpp	Mon Jul 28 20:29:28 2014 +0000
@@ -0,0 +1,63 @@
+// Internet Clock with LCD based on the work by Jim Hamblen and Tyler Lisowski
+
+#include "mbed.h"
+#include "EthernetInterface.h"
+#include "NTPClient.h"
+#include "uLCD_4DGL.h"
+
+// Parameters
+char* domain_name = "0.uk.pool.ntp.org";
+int port_number = 123;
+
+// Networking
+EthernetInterface eth;
+NTPClient ntp_client;
+
+// Graphic LCD - TX, RX, and RES pins
+uLCD_4DGL uLCD(p9,p10,p11);
+
+int main() {
+        
+    time_t ct_time;
+    char time_buffer[80];    
+        
+    // Initialize LCD
+    uLCD.baudrate(115200);
+    uLCD.background_color(BLACK);
+    uLCD.cls();
+    
+    // Connect to network and wait for DHCP
+    uLCD.locate(0,0); 
+    uLCD.printf("Getting IP Address\n");
+    eth.init();
+    if ( eth.connect() == -1 ) {
+        uLCD.printf("ERROR: Could not\nget IP address");
+        return -1;
+    }
+    uLCD.printf("IP address is \n%s\n\n",eth.getIPAddress());
+    wait(1);
+    
+    // Read time from server
+    uLCD.printf("Reading time...\n\r");
+    ntp_client.setTime(domain_name, port_number);
+    uLCD.printf("Time set\n");
+    wait(2);
+    eth.disconnect();
+    
+    // Reset LCD
+    uLCD.background_color(WHITE);
+    uLCD.textbackground_color(WHITE);
+    uLCD.color(RED);
+    uLCD.cls();
+    uLCD.text_height(2);
+    
+    // Loop and update clock
+    while (1) {
+        uLCD.locate(0, 1);
+        ct_time = time(NULL);
+        strftime(time_buffer, 80, "    %a %b %d\n    %T %p %z\n    %Z\n", \
+                                                localtime(&ct_time));
+        uLCD.printf("    UTC/GMT:\n%s", time_buffer);
+        wait(0.1);
+    }
+}
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