#include "LCD12864RSPI.h"
#include
#include
#include
#define AR_SIZE( a ) sizeof( a ) / sizeof( a[0] )
LCD12864RSPI LCDA(8,9,3);
int second,minute,hour;
byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
unsigned int localPort = 8888;
IPAddress timeServer(132, 163, 4, 101);
const int NTP_PACKET_SIZE= 48;
byte packetBuffer[ NTP_PACKET_SIZE];
EthernetUDP Udp;
unsigned char xitong[]={
0xCF, 0xB5,
0xCD, 0xB3,
0xB3, 0xF5,
0xCA, 0xBC,
0xBB, 0xAF
}; //系統(tǒng)初始化
unsigned char shijian[]={
0xB1, 0xB1,
0xBE, 0xA9,
0xCA, 0xB1,
0xBC, 0xE4
}; //北京時間
void setup()
{
kaiji();
delay(3000);
Serial.begin(9600);
while (!Serial) {
;
}
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
for(;;)
;
}
Udp.begin(localPort);
}
void loop()
{
sendNTPpacket(timeServer);
delay(1000);
if ( Udp.parsePacket() ) {
Udp.read(packetBuffer,NTP_PACKET_SIZE);
unsigned long highWord = word(packetBuffer[40], packetBuffer[41]);
unsigned long lowWord = word(packetBuffer[42], packetBuffer[43]);
unsigned long secsSince1900 = highWord << 16 | lowWord;
Serial.print("Seconds since Jan 1 1900 = " );
Serial.println(secsSince1900);
Serial.print("Unix time = ");
const unsigned long seventyYears = 2208988800UL;
unsigned long epoch = secsSince1900 - seventyYears;
Serial.println(epoch);
Serial.print("beijing time is ");
if((epoch % 86400L) / 3600+8>=24)
{
Serial.print((epoch % 86400L) / 3600+8-24);
}
if((epoch % 86400L) / 3600+8<24)
{
Serial.print((epoch % 86400L) / 3600+8);
hour=(epoch % 86400L) / 3600+8;
}
Serial.print(':');
if ( ((epoch % 3600) / 60) < 10 ) {
Serial.print('0');
}
Serial.print((epoch % 3600) / 60);
minute=(epoch % 3600) / 60;
Serial.print(':');
if ( (epoch % 60) < 10 )
{
Serial.print('0');
}
Serial.println(epoch `);
second=epoch `;
}
shijianx();
}
unsigned long sendNTPpacket(IPAddress& address)
{
memset(packetBuffer, 0, NTP_PACKET_SIZE);
packetBuffer[0] = 0b11100011;
packetBuffer[1] = 0;
packetBuffer[2] = 6;
packetBuffer[3] = 0xEC;
packetBuffer[12] = 49;
packetBuffer[13] = 0x4E;
packetBuffer[14] = 49;
packetBuffer[15] = 52;
Udp.beginPacket(address, 123);
Udp.write(packetBuffer,NTP_PACKET_SIZE);
Udp.endPacket();
}
void kaiji()
{
LCDA.clear();//清屏
LCDA.setCursor(1,0);
LCDA.chinese(xitong,AR_SIZE(xitong));
LCDA.print("......");
}
void shijianx()
{
LCDA.clear();//清屏
LCDA.setCursor(1,0);
LCDA.chinese(shijian,AR_SIZE(shijian));
LCDA.print(":");
LCDA.setCursor(2,3);
LCDA.print(hour);
LCDA.print(":");
LCDA.print(minute);
LCDA.print(":");
LCDA.print(second);
}
作品圖片：
