internet clock via ethernet cable
Dependencies: 4DGL-uLCD-SE EthernetInterface NTPClient mbed-rtos mbed
main.cpp@0:80d83068b7bd, 2016-01-30 (annotated)
- Committer:
- wye11
- Date:
- Sat Jan 30 07:33:17 2016 +0000
- Revision:
- 0:80d83068b7bd
internet clock via ethernet;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
wye11 | 0:80d83068b7bd | 1 | // Internet Clock with LCD based on the work by Jim Hamblen and Tyler Lisowski |
wye11 | 0:80d83068b7bd | 2 | |
wye11 | 0:80d83068b7bd | 3 | #include "mbed.h" |
wye11 | 0:80d83068b7bd | 4 | #include "EthernetInterface.h" |
wye11 | 0:80d83068b7bd | 5 | #include "NTPClient.h" |
wye11 | 0:80d83068b7bd | 6 | #include "uLCD_4DGL.h" |
wye11 | 0:80d83068b7bd | 7 | |
wye11 | 0:80d83068b7bd | 8 | // Parameters |
wye11 | 0:80d83068b7bd | 9 | char* domain_name = "0.uk.pool.ntp.org"; |
wye11 | 0:80d83068b7bd | 10 | int port_number = 123; |
wye11 | 0:80d83068b7bd | 11 | |
wye11 | 0:80d83068b7bd | 12 | // Networking |
wye11 | 0:80d83068b7bd | 13 | EthernetInterface eth; |
wye11 | 0:80d83068b7bd | 14 | NTPClient ntp_client; |
wye11 | 0:80d83068b7bd | 15 | |
wye11 | 0:80d83068b7bd | 16 | // Graphic LCD - TX, RX, and RES pins |
wye11 | 0:80d83068b7bd | 17 | uLCD_4DGL uLCD(p9,p10,p11); |
wye11 | 0:80d83068b7bd | 18 | |
wye11 | 0:80d83068b7bd | 19 | int main() { |
wye11 | 0:80d83068b7bd | 20 | |
wye11 | 0:80d83068b7bd | 21 | time_t ct_time; |
wye11 | 0:80d83068b7bd | 22 | char time_buffer[80]; |
wye11 | 0:80d83068b7bd | 23 | |
wye11 | 0:80d83068b7bd | 24 | // Initialize LCD |
wye11 | 0:80d83068b7bd | 25 | uLCD.baudrate(115200); |
wye11 | 0:80d83068b7bd | 26 | uLCD.background_color(BLACK); |
wye11 | 0:80d83068b7bd | 27 | uLCD.cls(); |
wye11 | 0:80d83068b7bd | 28 | |
wye11 | 0:80d83068b7bd | 29 | // Connect to network and wait for DHCP |
wye11 | 0:80d83068b7bd | 30 | uLCD.locate(0,0); |
wye11 | 0:80d83068b7bd | 31 | uLCD.printf("Getting IP Address\n"); |
wye11 | 0:80d83068b7bd | 32 | eth.init(); |
wye11 | 0:80d83068b7bd | 33 | if ( eth.connect() == -1 ) { |
wye11 | 0:80d83068b7bd | 34 | uLCD.printf("ERROR: Could not\nget IP address"); |
wye11 | 0:80d83068b7bd | 35 | return -1; |
wye11 | 0:80d83068b7bd | 36 | } |
wye11 | 0:80d83068b7bd | 37 | uLCD.printf("IP address is \n%s\n\n",eth.getIPAddress()); |
wye11 | 0:80d83068b7bd | 38 | wait(1); |
wye11 | 0:80d83068b7bd | 39 | |
wye11 | 0:80d83068b7bd | 40 | // Read time from server |
wye11 | 0:80d83068b7bd | 41 | uLCD.printf("Reading time...\n\r"); |
wye11 | 0:80d83068b7bd | 42 | ntp_client.setTime(domain_name, port_number); |
wye11 | 0:80d83068b7bd | 43 | uLCD.printf("Time set\n"); |
wye11 | 0:80d83068b7bd | 44 | wait(2); |
wye11 | 0:80d83068b7bd | 45 | eth.disconnect(); |
wye11 | 0:80d83068b7bd | 46 | |
wye11 | 0:80d83068b7bd | 47 | // Reset LCD |
wye11 | 0:80d83068b7bd | 48 | uLCD.background_color(WHITE); |
wye11 | 0:80d83068b7bd | 49 | uLCD.textbackground_color(WHITE); |
wye11 | 0:80d83068b7bd | 50 | uLCD.color(RED); |
wye11 | 0:80d83068b7bd | 51 | uLCD.cls(); |
wye11 | 0:80d83068b7bd | 52 | uLCD.text_height(2); |
wye11 | 0:80d83068b7bd | 53 | |
wye11 | 0:80d83068b7bd | 54 | // Loop and update clock |
wye11 | 0:80d83068b7bd | 55 | while (1) { |
wye11 | 0:80d83068b7bd | 56 | uLCD.locate(0, 1); |
wye11 | 0:80d83068b7bd | 57 | ct_time = time(NULL); |
wye11 | 0:80d83068b7bd | 58 | strftime(time_buffer, 80, " %a %b %d\n %T %p %z\n %Z\n", \ |
wye11 | 0:80d83068b7bd | 59 | localtime(&ct_time)); |
wye11 | 0:80d83068b7bd | 60 | uLCD.printf(" UTC/GMT:\n%s", time_buffer); |
wye11 | 0:80d83068b7bd | 61 | wait(0.1); |
wye11 | 0:80d83068b7bd | 62 | } |
wye11 | 0:80d83068b7bd | 63 | } |