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上传时间: 2018-09-19
详细说明： #include #include #include #include "LCD12864RSPI.h" #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 }; //系统初始化 unsigned char shijian[]={ 0xB1, 0xB1, 0xBE, 0xA9, 0xCA, 0xB1, 0xBC, 0xE4 }; //北京时间 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); } ...展开详情收缩
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