jim hamblen
LCD clock display set using NTP server
Dependencies: EthernetNetIf NTPClient_NetServices TextLCD mbed
Fork of
Internet_LCD_Clock
by 
jim hamblen
Revision 0:5c5226aac712, committed 2012-04-12
- Comitter:
- 4180_1
- Date:
- Thu Apr 12 01:44:02 2012 +0000
- Child:
- 1:09fcc9b81f23
- Commit message:
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/EthernetNetIf.lib Thu Apr 12 01:44:02 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/donatien/code/EthernetNetIf/#bc7df6da7589
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Internet_LCD_Clock.cpp Thu Apr 12 01:44:02 2012 +0000
@@ -0,0 +1,44 @@
+#include "mbed.h"
+#include "EthernetNetIf.h"
+#include "NTPClient.h"
+#include "TextLCD.h"
+// Internet of Things clock example: LCD time is set via internet NTP time server
+TextLCD lcd(p15, p16, p17, p18, p19, p20); // rs, e, d0-d3
+EthernetNetIf eth;
+NTPClient ntp;
+
+int main() {
+//system time structure
+ time_t ctTime;
+ //clear LCD
+ lcd.cls();
+ // lcd.printf prints to LCD display;
+ lcd.printf("Get IP addr...");
+ EthernetErr ethErr = eth.setup();
+ //Get an Internet IP address using DHCP
+ if (ethErr) {
+ //error or timeout getting an IP address
+ printf("Error %d in setup.\n\r", ethErr);
+ lcd.cls();
+ lcd.printf("Network Error \n\r %d",ethErr);
+ return -1;
+ }
+ lcd.cls();
+ ctTime = time(NULL);
+ lcd.printf("Reading Time...\n\r");
+ //specify time server URL
+ Host server(IpAddr(), 123, "0.uk.pool.ntp.org");
+ //Read time from server
+ ntp.setTime(server);
+ ctTime = time(NULL);
+ lcd.printf("Time set");
+ //Delay for human time to read LCD display
+ wait(1);
+ while (1) {
+ // loop and periodically update the LCD's time display
+ lcd.cls();
+ ctTime = time(NULL);
+ lcd.printf("UTC: %s", ctime(&ctTime));
+ wait(.25);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/NTPClient.lib Thu Apr 12 01:44:02 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/donatien/code/NTPClient/#7c3f1199256a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextLCD.lib Thu Apr 12 01:44:02 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/TextLCD/#44f34c09bd37
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Apr 12 01:44:02 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/9114680c05da