emNet TFTP Server (Sample)
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| IP_TFTP_Server_Sample.c | |
|---|---|
| Components required |
|
| Requires modifications | No |
| Download | IP_TFTP_Server_Sample.c |
This Sample demonstrates how to use the TFTP server that can be used to access files on the file system of the target. To connect to the TFTP server you can use any common TFTP client, such as the Windows TFTP client, or another Target running the emNet TFTP client sample.
Code
/*********************************************************************
* (c) SEGGER Microcontroller GmbH *
* The Embedded Experts *
* www.segger.com *
**********************************************************************
-------------------------- END-OF-HEADER -----------------------------
Purpose : TFTP server sample program for embOS & emNet
Additional information:
Demonstrates use of the emNet TFTP server that can be
used to access files on the file system of the target.
To connect to the server you can use any common
TFTP client such as the Windows 10 TFTP client,
or another device running the emNet TFTP client sample.
Preparations:
Works out-of-the-box.
You can configure the SERVER_PORT define to
configure the port the server will run on.
Notes :
For compatibility with interfaces that need to connect in
any way this sample calls connect and disconnect routines
that might not be needed in all cases.
This sample can be used for Ethernet and dial-up interfaces
and is configured to use the last registered interface as
its main interface.
*/
#include "RTOS.h"
#include "BSP.h"
#include "IP.h"
#include "IP_FS.h"
#include "IP_TFTP.h"
/*********************************************************************
*
* Configuration
*
**********************************************************************
*/
#define USE_RX_TASK 0 // 0: Packets are read in ISR, 1: Packets are read in a task of its own.
//
// TFTP server sample.
//
#define SERVER_PORT 69
//
// Task priorities.
//
enum {
TASK_PRIO_IP_TFTP = 150
,TASK_PRIO_IP_TASK // Priority should be higher than all IP application tasks.
#if USE_RX_TASK
,TASK_PRIO_IP_RX_TASK // Must be the highest priority of all IP related tasks.
#endif
};
//
// Task stack sizes that might not fit for some interfaces (multiples of sizeof(int)).
//
#ifndef APP_TASK_STACK_OVERHEAD
#define APP_TASK_STACK_OVERHEAD 0
#endif
/*********************************************************************
*
* Static data
*
**********************************************************************
*/
static IP_HOOK_ON_STATE_CHANGE _StateChangeHook;
static int _IFaceId;
static TFTP_CONTEXT _Context; // TFTP context holding settings and states.
static char _acBuffer[516]; // Largest possible TFTP packet size is 516 bytes. 512 bytes payload and 4 bytes TFTP header.
//
// Task stacks and Task-Control-Blocks.
//
static OS_STACKPTR int _IPStack[TASK_STACK_SIZE_IP_TASK/sizeof(int)]; // Stack of the IP_Task.
static OS_TASK _IPTCB; // Task-Control-Block of the IP_Task.
#if USE_RX_TASK
static OS_STACKPTR int _IPRxStack[TASK_STACK_SIZE_IP_RX_TASK/sizeof(int)]; // Stack of the IP_RxTask.
static OS_TASK _IPRxTCB; // Task-Control-Block of the IP_RxTask.
#endif
static OS_STACKPTR int _TFTPStack[2048/sizeof(int)]; // Stack of the TFTP task.
static OS_TASK _TFTPTCB; // Task-Control-Block of the TFTP task.
/*********************************************************************
*
* Prototypes
*
**********************************************************************
*/
#ifdef __cplusplus
extern "C" { /* Make sure we have C-declarations in C++ programs */
#endif
void MainTask(void);
#ifdef __cplusplus
}
#endif
/*********************************************************************
*
* Local functions
*
**********************************************************************
*/
/*********************************************************************
*
* _OnStateChange()
*
* Function description
* Callback that will be notified once the state of an interface
* changes.
*
* Parameters
* IFaceId : Zero-based interface index.
* AdminState: Is this interface enabled ?
* HWState : Is this interface physically ready ?
*/
static void _OnStateChange(unsigned IFaceId, U8 AdminState, U8 HWState) {
//
// Check if this is a disconnect from the peer or a link down.
// In this case call IP_Disconnect() to get into a known state.
//
if (((AdminState == IP_ADMIN_STATE_DOWN) && (HWState == 1)) || // Typical for dial-up connection e.g. PPP when closed from peer. Link up but app. closed.
((AdminState == IP_ADMIN_STATE_UP) && (HWState == 0))) { // Typical for any Ethernet connection e.g. PPPoE. App. opened but link down.
IP_Disconnect(IFaceId); // Disconnect the interface to a clean state.
}
}
/*********************************************************************
*
* Global functions
*
**********************************************************************
*/
/*********************************************************************
*
* MainTask()
*
* Function description
* Main task executed by the RTOS to create further resources and
* running the main application.
*/
void MainTask(void) {
IP_Init();
_IFaceId = IP_INFO_GetNumInterfaces() - 1; // Get the last registered interface ID as this is most likely the interface we want to use in this sample.
OS_SetPriority(OS_GetTaskID(), TASK_PRIO_IP_TASK); // For now, this task has highest prio except IP management tasks.
OS_CREATETASK (&_IPTCB , "IP_Task" , IP_Task , TASK_PRIO_IP_TASK , _IPStack); // Start the IP_Task.
#if USE_RX_TASK
OS_CREATETASK (&_IPRxTCB, "IP_RxTask" , IP_RxTask , TASK_PRIO_IP_RX_TASK, _IPRxStack); // Start the IP_RxTask, optional.
#endif
IP_TFTP_InitContext(&_Context, _IFaceId, &IP_FS_FS, _acBuffer, sizeof(_acBuffer), SERVER_PORT); // Init the TFTP server.
OS_CREATETASK_EX(&_TFTPTCB, "TFTP server", IP_TFTP_ServerTask, TASK_PRIO_IP_TFTP , _TFTPStack, (void*)&_Context); // Start the TFTP server task.
IP_AddStateChangeHook(&_StateChangeHook, _OnStateChange); // Register hook to be notified on disconnects.
IP_Connect(_IFaceId); // Connect the interface if necessary.
OS_SetPriority(OS_GetTaskID(), 255); // Now this task has highest prio for real-time application. This is only allowed when this task does not use blocking IP API after this point.
while (IP_IFaceIsReadyEx(_IFaceId) == 0) {
OS_Delay(50);
}
while (1) {
BSP_ToggleLED(1);
OS_Delay(200);
}
}
/*************************** End of file ****************************/