lcd clock
Dependencies: NTPClient_NetServices mbed 4DGL-uLCD-SE EthernetNetIf
Internet_LCD_Clock.cpp
- Committer:
- emilywilson
- Date:
- 2020-02-06
- Revision:
- 1:9da7a9089f12
- Parent:
- 0:da7f4b6d2b7c
File content as of revision 1:9da7a9089f12:
#include "mbed.h" #include "EthernetNetIf.h" #include "NTPClient.h" #include "uLCD_4DGL.h" // Internet of Things clock example: LCD time is set via internet NTP time server EthernetNetIf eth; NTPClient ntp; uLCD_4DGL lcd(p28,p27,p30); // mosi, sclk, cs, rst, type int main() { //system time structure time_t ctTime; char *time_str; //clear LCD // 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 lcd.printf("Net Error %d",ethErr); return -1; } lcd.printf("Reading Time..."); //specify time server URL Host server(IpAddr(), 123, "0.north-america.pool.ntp.org"); //Read time from server ntp.setTime(server); 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:"); time_str = ctime(&ctTime); time_str[strlen(time_str)-1] = 0; lcd.printf("%s", time_str); wait(1); } }