Zoltan Hudak / Mbed OS UdpClient_ENC28J60

Simple UDP Client using the UIPEthernet library for ENC28J60 Ethernet boards.

Dependencies:   UIPEthernet

main.cpp@1:f6b6e2c173b9, 2017-07-01 (annotated)

Committer:
hudakz
Date:
Sat Jul 01 08:37:21 2017 +0000
Revision:
1:f6b6e2c173b9
Parent:
0:47d7b7b2bba3
Child:
2:c69ad6e71f97
Updated.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hudakz 0:47d7b7b2bba3 1 /*
hudakz 0:47d7b7b2bba3 2 * UIPEthernet UdpClient example.
hudakz 0:47d7b7b2bba3 3 *
hudakz 1:f6b6e2c173b9 4 * UIPEthernet is a TCP/IP stack that can be used with an enc28j60 based
hudakz 0:47d7b7b2bba3 5 * Ethernet-shield.
hudakz 0:47d7b7b2bba3 6 *
hudakz 0:47d7b7b2bba3 7 * UIPEthernet uses the fine uIP stack by Adam Dunkels <adam@sics.se>
hudakz 0:47d7b7b2bba3 8 *
hudakz 0:47d7b7b2bba3 9 * -----------------
hudakz 0:47d7b7b2bba3 10 *
hudakz 1:f6b6e2c173b9 11 * This UdpClient example tries to send a packet via udp to 192.168.1.181
hudakz 1:f6b6e2c173b9 12 * on port 7 every 5 seconds. After successfully sending the packet it
hudakz 0:47d7b7b2bba3 13 * waits for up to 5 seconds for a response on the local port that has been
hudakz 0:47d7b7b2bba3 14 * implicitly opened when sending the packet.
hudakz 0:47d7b7b2bba3 15 *
hudakz 0:47d7b7b2bba3 16 * Copyright (C) 2013 by Norbert Truchsess (norbert.truchsess@t-online.de)
hudakz 0:47d7b7b2bba3 17 *
hudakz 0:47d7b7b2bba3 18 * Modified by Zoltan Hudak
hudakz 0:47d7b7b2bba3 19 *
hudakz 0:47d7b7b2bba3 20 */
hudakz 0:47d7b7b2bba3 21 #include "mbed.h"
hudakz 0:47d7b7b2bba3 22 #include "UIPEthernet.h"
hudakz 0:47d7b7b2bba3 23
hudakz 0:47d7b7b2bba3 24 // MAC address must be unique within the connected network. Modify as appropriate.
hudakz 0:47d7b7b2bba3 25 const uint8_t MY_MAC[6] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
hudakz 0:47d7b7b2bba3 26 // IP address must be unique and compatible with your network.
hudakz 1:f6b6e2c173b9 27 const IPAddress MY_IP(192, 168, 1, 182); // this UDP client IP address
hudakz 1:f6b6e2c173b9 28 const IPAddress SRV_IP(192, 168, 1, 181); // UDP server IP address
hudakz 1:f6b6e2c173b9 29 const uint16_t PORT = 7; // port used
hudakz 0:47d7b7b2bba3 30 const char* message = "Hello World from mbed!";
hudakz 0:47d7b7b2bba3 31
hudakz 0:47d7b7b2bba3 32 Serial pc(USBTX, USBRX);
hudakz 0:47d7b7b2bba3 33 UIPEthernet uIPEthernet(D11, D12, D13, D10); // mosi, miso, sck, cs
hudakz 0:47d7b7b2bba3 34 UIPUDP udp;
hudakz 0:47d7b7b2bba3 35
hudakz 0:47d7b7b2bba3 36 /**
hudakz 0:47d7b7b2bba3 37 * @brief
hudakz 0:47d7b7b2bba3 38 * @note
hudakz 0:47d7b7b2bba3 39 * @param
hudakz 0:47d7b7b2bba3 40 * @retval
hudakz 0:47d7b7b2bba3 41 */
hudakz 0:47d7b7b2bba3 42 int main(void) {
hudakz 0:47d7b7b2bba3 43 const char* message = "Hello World from mbed";
hudakz 1:f6b6e2c173b9 44 time_t next = time(NULL);
hudakz 0:47d7b7b2bba3 45 uIPEthernet.begin(MY_MAC, MY_IP);
hudakz 0:47d7b7b2bba3 46
hudakz 0:47d7b7b2bba3 47 IPAddress localIP = uIPEthernet.localIP();
hudakz 0:47d7b7b2bba3 48 pc.printf("Local IP = %s\r\n", localIP.toString());
hudakz 0:47d7b7b2bba3 49
hudakz 0:47d7b7b2bba3 50 while (1) {
hudakz 0:47d7b7b2bba3 51 int success;
hudakz 0:47d7b7b2bba3 52 int len = 0;
hudakz 0:47d7b7b2bba3 53
hudakz 0:47d7b7b2bba3 54 if (time(NULL) > next) {
hudakz 0:47d7b7b2bba3 55 next = time(NULL) + 5;
hudakz 0:47d7b7b2bba3 56
hudakz 0:47d7b7b2bba3 57 do {
hudakz 1:f6b6e2c173b9 58 success = udp.beginPacket(SRV_IP, PORT);
hudakz 0:47d7b7b2bba3 59 pc.printf("beginPacket: ");
hudakz 0:47d7b7b2bba3 60 if (success)
hudakz 0:47d7b7b2bba3 61 pc.printf("succeeded.\r\n");
hudakz 0:47d7b7b2bba3 62 else
hudakz 0:47d7b7b2bba3 63 pc.printf("failed.\r\n");
hudakz 0:47d7b7b2bba3 64
hudakz 0:47d7b7b2bba3 65 //beginPacket fails if remote ethaddr is unknown. In this case an
hudakz 0:47d7b7b2bba3 66 //arp-request is send out first and beginPacket succeeds as soon
hudakz 0:47d7b7b2bba3 67 //the arp-response is received.
hudakz 0:47d7b7b2bba3 68 } while (!success && (time(NULL) < next));
hudakz 0:47d7b7b2bba3 69
hudakz 0:47d7b7b2bba3 70 if (!success) {
hudakz 0:47d7b7b2bba3 71 udp.stop();
hudakz 0:47d7b7b2bba3 72 next = time(NULL) + 5;
hudakz 0:47d7b7b2bba3 73 continue;
hudakz 0:47d7b7b2bba3 74 }
hudakz 0:47d7b7b2bba3 75
hudakz 0:47d7b7b2bba3 76 success = udp.write((uint8_t*)message, strlen(message));
hudakz 0:47d7b7b2bba3 77 pc.printf("bytes written: %d\r\n", success);
hudakz 0:47d7b7b2bba3 78
hudakz 0:47d7b7b2bba3 79 success = udp.endPacket();
hudakz 0:47d7b7b2bba3 80
hudakz 0:47d7b7b2bba3 81 if (success)
hudakz 0:47d7b7b2bba3 82 pc.printf("endPacket: succeeded%\r\n");
hudakz 0:47d7b7b2bba3 83 else
hudakz 0:47d7b7b2bba3 84 pc.printf("endPacket: failed%\r\n");
hudakz 0:47d7b7b2bba3 85
hudakz 0:47d7b7b2bba3 86 do {
hudakz 0:47d7b7b2bba3 87 success = udp.parsePacket(); //check for new udp-packet
hudakz 0:47d7b7b2bba3 88 } while (!success && (time(NULL) < next));
hudakz 0:47d7b7b2bba3 89
hudakz 0:47d7b7b2bba3 90 if (!success) {
hudakz 0:47d7b7b2bba3 91 udp.stop();
hudakz 0:47d7b7b2bba3 92 next = time(NULL) + 5;
hudakz 0:47d7b7b2bba3 93 continue;
hudakz 0:47d7b7b2bba3 94 }
hudakz 0:47d7b7b2bba3 95
hudakz 0:47d7b7b2bba3 96 pc.printf("received: '");
hudakz 0:47d7b7b2bba3 97
hudakz 0:47d7b7b2bba3 98 do {
hudakz 0:47d7b7b2bba3 99 int c = udp.read();
hudakz 0:47d7b7b2bba3 100 pc.putc(c);
hudakz 0:47d7b7b2bba3 101 len++;
hudakz 0:47d7b7b2bba3 102 } while (udp.available() > 0);
hudakz 0:47d7b7b2bba3 103
hudakz 0:47d7b7b2bba3 104 pc.printf("', %d bytes\r\n", len);
hudakz 0:47d7b7b2bba3 105
hudakz 0:47d7b7b2bba3 106 //finish reading this packet:
hudakz 0:47d7b7b2bba3 107 udp.flush();
hudakz 1:f6b6e2c173b9 108 next = time(NULL) + 5;
hudakz 0:47d7b7b2bba3 109 }
hudakz 0:47d7b7b2bba3 110 }
hudakz 0:47d7b7b2bba3 111 }