TFTPServerTest - This is an example code for using the TFTPServer …

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This is an example code for using the TFTPServer library.

Fork of TFTPServerTest by Jaap Vermaas

A simple TFTP server built with the TFTPServer library

In this example a FAT formatted SD card is connected to the MBED board to provide a storage place for a TFTP server. This will allow us to upload files to or download files from the TFTP server (SD card) over an Ethernet connection as well as to use the files uploaded to the TFTP server in a program running on the MBED board.

Schematic

/media/uploads/hudakz/tftpserver01.png

We can use for example the SD Formatter utility to format an SD card for the FAT file system .

NOTE: In the commands below substitute 192.168.1.185 with the actual IP address of your TFTP server. It's printed to the serial terminal of the connected PC during the server start up.

To upload or download files from a MS Windows PC we can use the TFTP client utility as follows:

To upload for example the test.txt file to the TFTP server:
- Open a command prompt in the folder the file is located in.
- Type tftp 192.168.1.185 put test.txt /fs/test.txt and hit ENTER
To download for example the test.txt file from the TFTP server:
- Open a command prompt in the destination folder.
- Type tftp 192.168.1.185 get /fs/test.txt test.txt and hit ENTER

A similar built-in TFTP client is available also on MAC and Linux operating systems.

References:

main.cpp@0:5c9e0971532d, 2011-12-27 (annotated)

Committer:: tuxic
Date:: Tue Dec 27 10:41:28 2011 +0000
Revision:: 0:5c9e0971532d
Child:: 1:698437bcd48d

Who changed what in which revision?

User	Revision	Line number	New contents of line
tuxic	0:5c9e0971532d	1	/*
tuxic	0:5c9e0971532d	2	* example program for TFTPServer class
tuxic	0:5c9e0971532d	3	*
tuxic	0:5c9e0971532d	4	* How to use:
tuxic	0:5c9e0971532d	5	* -> change the IP to something that works for you
tuxic	0:5c9e0971532d	6	* -> connect to the mbed with a TFTP client in binary(octet) mode
tuxic	0:5c9e0971532d	7	* -> use (s)uspend and (r)esume keys to turn TFTP server on/off
tuxic	0:5c9e0971532d	8	* -> upload any file, but .bin files are always put on the internal
tuxic	0:5c9e0971532d	9	* memory, as are config.txt files
tuxic	0:5c9e0971532d	10	*
tuxic	0:5c9e0971532d	11	* Copyright (c) 2011 Jaap Vermaas
tuxic	0:5c9e0971532d	12	*
tuxic	0:5c9e0971532d	13	* This file is part of the LaOS project (see: http://wiki.laoslaser.org
tuxic	0:5c9e0971532d	14	*
tuxic	0:5c9e0971532d	15	* LaOS is free software: you can redistribute it and/or modify
tuxic	0:5c9e0971532d	16	* it under the terms of the GNU General Public License as published by
tuxic	0:5c9e0971532d	17	* the Free Software Foundation, either version 3 of the License, or
tuxic	0:5c9e0971532d	18	* (at your option) any later version.
tuxic	0:5c9e0971532d	19	*
tuxic	0:5c9e0971532d	20	* LaOS is distributed in the hope that it will be useful,
tuxic	0:5c9e0971532d	21	* but WITHOUT ANY WARRANTY; without even the implied warranty of
tuxic	0:5c9e0971532d	22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
tuxic	0:5c9e0971532d	23	* GNU General Public License for more details.
tuxic	0:5c9e0971532d	24	*
tuxic	0:5c9e0971532d	25	* You should have received a copy of the GNU General Public License
tuxic	0:5c9e0971532d	26	* along with LaOS. If not, see <http://www.gnu.org/licenses/>.
tuxic	0:5c9e0971532d	27	*/
tuxic	0:5c9e0971532d	28	#include "mbed.h"
tuxic	0:5c9e0971532d	29	#include "SDFileSystem.h"
tuxic	0:5c9e0971532d	30	#include "TFTPServer.h"
tuxic	0:5c9e0971532d	31	#include "EthernetNetIf.h"
tuxic	0:5c9e0971532d	32	LocalFileSystem local("local"); // defining this makes MBED internal mem accessible
tuxic	0:5c9e0971532d	33
tuxic	0:5c9e0971532d	34	TFTPServer *srv; // define the TFTP Server
tuxic	0:5c9e0971532d	35	Timer t; // used in main() to send debug output every 2 seconds
tuxic	0:5c9e0971532d	36	Serial *serial; // serial just for debugging
tuxic	0:5c9e0971532d	37	SDFileSystem sd(p11, p12, p13, p14, "sd"); // only needed if you save to SD card
tuxic	0:5c9e0971532d	38	EthernetNetIf *eth; // network device
tuxic	0:5c9e0971532d	39
tuxic	0:5c9e0971532d	40	int main() {
tuxic	0:5c9e0971532d	41
tuxic	0:5c9e0971532d	42	// configure serial terminal
tuxic	0:5c9e0971532d	43	serial = new Serial(USBTX, USBRX);
tuxic	0:5c9e0971532d	44	serial->baud(115200);
tuxic	0:5c9e0971532d	45
tuxic	0:5c9e0971532d	46	// set up networking
tuxic	0:5c9e0971532d	47	eth = new EthernetNetIf(
tuxic	0:5c9e0971532d	48	IpAddr(192,168,1,111), //IP Address
tuxic	0:5c9e0971532d	49	IpAddr(255,255,255,0), //Network Mask
tuxic	0:5c9e0971532d	50	IpAddr(192,168,1,1), //Gateway
tuxic	0:5c9e0971532d	51	IpAddr(192,168,1,1) //DNS
tuxic	0:5c9e0971532d	52	);
tuxic	0:5c9e0971532d	53	eth->setup();
tuxic	0:5c9e0971532d	54
tuxic	0:5c9e0971532d	55	// test SD card (TFTP server can work without it)
tuxic	0:5c9e0971532d	56	printf("TEST SD...\n\r");
tuxic	0:5c9e0971532d	57	FILE *fp = fopen("/sd/test.txt", "wb");
tuxic	0:5c9e0971532d	58	if ( fp == NULL )
tuxic	0:5c9e0971532d	59	printf("SD: NOT READY\n\r");
tuxic	0:5c9e0971532d	60	else {
tuxic	0:5c9e0971532d	61	printf("SD: READY...\n\r");
tuxic	0:5c9e0971532d	62	fclose(fp);
tuxic	0:5c9e0971532d	63	}
tuxic	0:5c9e0971532d	64	remove("/sd/test.txt");
tuxic	0:5c9e0971532d	65
tuxic	0:5c9e0971532d	66	// start tftp server with the work dir as a comment
tuxic	0:5c9e0971532d	67	// use "/local/" for the internal mbed device
tuxic	0:5c9e0971532d	68	srv = new TFTPServer("/sd/");
tuxic	0:5c9e0971532d	69
tuxic	0:5c9e0971532d	70	t.start();
tuxic	0:5c9e0971532d	71	int filecounter = 0; // incoming files
tuxic	0:5c9e0971532d	72	char filename[256]; // to display filenames
tuxic	0:5c9e0971532d	73	while (1) {
tuxic	0:5c9e0971532d	74	Net::poll();
tuxic	0:5c9e0971532d	75	if (serial->readable()) {
tuxic	0:5c9e0971532d	76	int c = serial->getc();
tuxic	0:5c9e0971532d	77	switch (c) {
tuxic	0:5c9e0971532d	78	case 's':
tuxic	0:5c9e0971532d	79	srv->suspend();
tuxic	0:5c9e0971532d	80	break;
tuxic	0:5c9e0971532d	81	case 'r':
tuxic	0:5c9e0971532d	82	srv->resume();
tuxic	0:5c9e0971532d	83	break;
tuxic	0:5c9e0971532d	84	}
tuxic	0:5c9e0971532d	85	}
tuxic	0:5c9e0971532d	86
tuxic	0:5c9e0971532d	87	if (srv->fileCnt() > filecounter) {
tuxic	0:5c9e0971532d	88	filecounter = srv->fileCnt();
tuxic	0:5c9e0971532d	89	srv->getFilename(filename);
tuxic	0:5c9e0971532d	90	printf("new file: %s\n\r", filename);
tuxic	0:5c9e0971532d	91	}
tuxic	0:5c9e0971532d	92	if (t.read() > 2) {
tuxic	0:5c9e0971532d	93	t.reset();
tuxic	0:5c9e0971532d	94	TFTPServerState state = srv->State();
tuxic	0:5c9e0971532d	95	switch(state) {
tuxic	0:5c9e0971532d	96	case listen:
tuxic	0:5c9e0971532d	97	printf("MAIN: TFTP listen\n\r");
tuxic	0:5c9e0971532d	98	break;
tuxic	0:5c9e0971532d	99	case reading:
tuxic	0:5c9e0971532d	100	srv->getFilename(filename);
tuxic	0:5c9e0971532d	101	printf("MAIN: TFTP reading file: %s\n\r", filename);
tuxic	0:5c9e0971532d	102	break;
tuxic	0:5c9e0971532d	103	case writing:
tuxic	0:5c9e0971532d	104	srv->getFilename(filename);
tuxic	0:5c9e0971532d	105	printf("MAIN: TFTP writing file: %s\n\r", filename);
tuxic	0:5c9e0971532d	106	break;
tuxic	0:5c9e0971532d	107	case error:
tuxic	0:5c9e0971532d	108	printf("MAIN: TFTP error\n\r");
tuxic	0:5c9e0971532d	109	break;
tuxic	0:5c9e0971532d	110	case suspended:
tuxic	0:5c9e0971532d	111	printf("MAIN: TFTP suspended\n\r");
tuxic	0:5c9e0971532d	112	break;
tuxic	0:5c9e0971532d	113	default:
tuxic	0:5c9e0971532d	114	printf("MAIN: Unknown TFTP status\n\r");
tuxic	0:5c9e0971532d	115	break;
tuxic	0:5c9e0971532d	116	}
tuxic	0:5c9e0971532d	117	}
tuxic	0:5c9e0971532d	118	}
tuxic	0:5c9e0971532d	119	}
tuxic	0:5c9e0971532d	120

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Type:	Program
Mbed OS support:	Mbed OS
Created:	16 Mar 2018
Imports:	11
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