internet clock via ethernet cable
Dependencies: 4DGL-uLCD-SE EthernetInterface NTPClient mbed-rtos mbed
main.cpp
- Committer:
- wye11
- Date:
- 2016-01-30
- Revision:
- 0:80d83068b7bd
File content as of revision 0:80d83068b7bd:
// 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); } }