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/*********************************************************************
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*
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* TFTP Client Demo App for Microchip TCP/IP Stack
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*
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*********************************************************************
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* FileName: TFTPcDemo.c
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* Dependencies: tftpc.h
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* stacktsk.h
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* xlcd.h
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* tick.h
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* Processor: PIC18
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* Complier: MCC18 v1.00.50 or higher
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* HITECH PICC-18 V8.10PL1 or higher
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* Company: Microchip Technology, Inc.
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*
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* Software License Agreement
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*
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* The software supplied herewith by Microchip Technology Incorporated
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* (the “Company”) for its PICmicro® Microcontroller is intended and
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* supplied to you, the Company’s customer, for use solely and
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* exclusively on Microchip PICmicro Microcontroller products. The
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* software is owned by the Company and/or its supplier, and is
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* protected under applicable copyright laws. All rights are reserved.
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* Any use in violation of the foregoing restrictions may subject the
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* user to criminal sanctions under applicable laws, as well as to
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* civil liability for the breach of the terms and conditions of this
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* license.
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*
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* THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
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* WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
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* TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
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* IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
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* CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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*
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* Author Date Comment
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*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* Nilesh Rajbharti 8/7/03 Original (Rev 1.0)
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*
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*
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* This demo application demonstartes Microchip TFTP client module usage
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* See TFTPDemo(), TFTPWrite() and TFTPRead() for actual implementation.
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*
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* This application monitors RB5 switch. On first push it
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* writes 'tftpwr.bin' file to server. tftpwr.bin file is made up of
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* first 16KB of program memory.
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* On second push, it reads 'tftprd.txt' file from server.
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*
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* Server IP address is set in "Board Setup" mode using Hyperterminal.
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*
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* It displays rotating '-' to indicate command in progress.
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* 'Y' to indicate success
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* 'N' for failure
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* 'T' for timeout
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* 'E' for error.
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*
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*
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* If running this applicaton on PICDEM.net use
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* HS Oscillator
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* Debug disabled
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* Low Voltage Disabled
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* Watchdog timer disabled
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********************************************************************/
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/*
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* Following define uniquely deines this file as main
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* entry/application In whole project, there should only be one such
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* definition and application file must define AppConfig variable as
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* described below.
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*/
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#define THIS_IS_STACK_APPLICATION
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#include "stacktsk.h"
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#include "dhcp.h"
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#include "tftpc.h"
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#include "xlcd.h"
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#include "tick.h"
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#include "xeeprom.h"
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#include "delay.h"
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#define BAUD_RATE (19200) // bps
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// All TFTP command statuts display will be done on first line of LCD.
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#define TFTP_COMMAND_DISPLAY_LINE 0
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// Result will be displayed at y = 15.
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#define TFTP_COMMAND_RESULT_POSITION 15
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#define STARTUP_MSG "MpStack 2.20.02+"
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ROM char StartupMsg[] = STARTUP_MSG;
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#if defined(STACK_USE_DHCP) || defined(STACK_USE_IP_GLEANING)
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ROM char DHCPMsg[] = "DHCP/Gleaning...";
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#endif
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ROM char SetupMsg[] = "Board Setup...";
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// 1234567890123456
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ROM char blankLCDLine[] = " ";
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// Name of TFTP Put file
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static char tftpFilePutName[] = "tftpwr.bin";
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// Name of TFTP Get file
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static char tftpFileGetName[] = "tftprd.txt";
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// Strings to display on appropriate command.
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ROM char tftpPutString[] = "PUT";
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ROM char tftpGetString[] = "GET";
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#define USART_USE_BRGH_LOW
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#if defined(USART_USE_BRGH_LOW)
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#define SPBRG_VAL ( ((CLOCK_FREQ/BAUD_RATE)/64) - 1)
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#else
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#define SPBRG_VAL ( ((CLOCK_FREQ/BAUD_RATE)/16) - 1)
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#endif
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#if SPBRG_VAL > 255
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#error "Calculated SPBRG value is out of range for currnet CLOCK_FREQ."
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#endif
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/*
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* This is used by other stack elements.
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* Main application must define this and initialize it with
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* proper values.
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*/
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APP_CONFIG AppConfig;
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BYTE myDHCPBindCount = 0;
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#if defined(STACK_USE_DHCP)
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extern BYTE DHCPBindCount;
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#else
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/*
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* If DHCP is not enabled, force DHCP update.
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*/
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BYTE DHCPBindCount = 1;
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#endif
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// This demo application issues PUT on first push of RB5
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// GET on second push.
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static union
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{
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struct
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{
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unsigned int bFirstPush : 1;
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} bits;
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BYTE Val;
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} tftpDemoFlag;
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#if defined(MCHP_C18) && defined(__18F8720)
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#define TXSTAbits TXSTA1bits
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#define TXREG TXREG1
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#define TXSTA TXSTA1
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#define RCSTA RCSTA1
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#define SPBRG SPBRG1
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#define RCREG RCREG1
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#endif
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/*
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* Set configuration fuses for HITECH compiler.
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* For MCC18 compiler, separately linked config.asm file
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* will set the correct fuses.
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*/
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#if defined(HITECH_C18)
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__CONFIG(1, UNPROTECT & HS);
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__CONFIG(2, PWRTEN & BORDIS & WDTDIS);
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#endif
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/*
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* Private helper functions.
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* These may or may not be present in all applications.
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*/
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static void InitAppConfig(void);
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static void InitializeBoard(void);
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static void DisplayIPValue(IP_ADDR *IPVal, BOOL bToLCD);
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static void SetConfig(void);
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static void SaveAppConfig(void);
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static void USARTPut(BYTE c);
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static void USARTPutString(BYTE *s);
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static BOOL TFTPRead(void);
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static BOOL TFTPWrite(void);
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static void TFTPDemo(void);
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#define USARTIsGetReady() (PIR1_RCIF)
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#define USARTGet() (RCREG)
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void main(void)
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{
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// Tick to blink SYSTEM led.
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static TICK t = 0;
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// Remember that next RB5 push is the first one.
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tftpDemoFlag.bits.bFirstPush = TRUE;
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/*
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* Initialize any application specific hardware.
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*/
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InitializeBoard();
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/*
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* Since we are not using MPFS, initialize XEEPROM directly.
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* If MPFS was used, calling MPFSInit() would automatically
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* initialize XEEPROM.
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*/
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XEEInit(EE_BAUD(CLOCK_FREQ, 400000));
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/*
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* Initialize all stack related components.
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* Following steps must be performed for all applications using
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* PICmicro TCP/IP Stack.
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*/
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TickInit();
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/*
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* Initialize Stack and application related NV variables.
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*/
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InitAppConfig();
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/*
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* This implementation, initiates Board setup process if RB5
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* is detected low on startup.
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*/
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if ( PORTB_RB5 == 0 )
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{
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XLCDGoto(1, 0);
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XLCDPutROMString(SetupMsg);
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SetConfig();
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}
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StackInit();
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#if defined(STACK_USE_DHCP) || defined(STACK_USE_IP_GLEANING)
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if ( AppConfig.Flags.bIsDHCPEnabled )
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{
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XLCDGoto(1, 0);
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XLCDPutROMString(DHCPMsg);
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}
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else
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{
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/*
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* Force IP address display update.
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*/
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myDHCPBindCount = 1;
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#if defined(STACK_USE_DHCP)
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DHCPDisable();
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#endif
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}
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#endif
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/*
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* Once all items are initialized, go into infinite loop and let
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* stack items execute their tasks.
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* If application needs to perform its own task, it should be
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* done at the end of while loop.
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* Note that this is a "co-operative mult-tasking" mechanism
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* where every task performs its tasks (whether all in one shot
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* or part of it) and returns so that other tasks can do their
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* job.
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* If a task needs very long time to do its job, it must broken
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* down into smaller pieces so that other tasks can have CPU time.
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*/
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while(1)
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{
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/*
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* Blink SYSTEM LED every second.
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*/
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if ( TickGetDiff(TickGet(), t) >= TICK_SECOND/2 )
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{
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t = TickGet();
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LATA4 ^= 1;
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}
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/*
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* This task performs normal stack task including checking
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* for incoming packet, type of packet and calling
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* appropriate stack entity to process it.
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*/
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StackTask();
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/*
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* For DHCP information, display how many times we have renewed the IP
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* configuration since last reset.
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*/
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if ( DHCPBindCount != myDHCPBindCount )
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{
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DisplayIPValue(&AppConfig.MyIPAddr, TRUE);
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myDHCPBindCount = DHCPBindCount;
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if ( AppConfig.Flags.bIsDHCPEnabled )
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{
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XLCDGoto(1, 14);
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if ( myDHCPBindCount < 0x0a )
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XLCDPut(myDHCPBindCount + '0');
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else
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XLCDPut(myDHCPBindCount + 'A');
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}
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}
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/*
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* This demo applicaton, monitors RB5 switch on-board PICDEM.net board.
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* On first push, it uses TFTP PUT to send a file named "put.txt".
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* On second push, it gets same "put.txt" file from server.
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*
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* Wait until IP address is assigned to this board.
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*/
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if ( !stackFlags.bits.bInConfigMode )
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TFTPDemo();
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}
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}
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static void TFTPDemo(void)
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{
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static enum
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{
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SM_TFTP_DEMO_IDLE,
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SM_TFTP_DEMO_WAIT,
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SM_TFTP_DEMO_READY,
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SM_TFTP_DEMO_WRITE,
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SM_TFTP_DEMO_READ,
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SM_TFTP_DEMO_CYCLE
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} smTFTPDemo = SM_TFTP_DEMO_IDLE;
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TFTP_RESULT result;
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// Display rotating '-' while we execute command.
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if ( smTFTPDemo == SM_TFTP_DEMO_WRITE ||
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smTFTPDemo == SM_TFTP_DEMO_READ )
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{
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static char displayChar[] = { '-', '\\', '|', '/' };
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static char i = 0;
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static TICK lastTick = 0;
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if ( TickGetDiff(TickGet(), lastTick) >= TICK_SECOND/2 )
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{
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XLCDGoto(TFTP_COMMAND_DISPLAY_LINE, TFTP_COMMAND_RESULT_POSITION);
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XLCDPut(displayChar[i++]);
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if ( i == 4 )
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i = 0;
|
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|
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lastTick = TickGet();
|
361 |
}
|
362 |
}
|
363 |
|
364 |
|
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// Main state machine for demo.
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switch(smTFTPDemo)
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{
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case SM_TFTP_DEMO_IDLE:
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// On startup, we try to resolve TFTP server IP address.
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// Application may decide to do this when actual TFTP operation is required
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// This is completely application dependent.
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// By doing it here, we can reuse ARP on subsequent TFTP operation
|
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TFTPOpen(&AppConfig.TFTPServerAddr);
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// Now we must wait for ARP to get resolved.
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smTFTPDemo = SM_TFTP_DEMO_WAIT;
|
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break;
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378 |
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379 |
case SM_TFTP_DEMO_WAIT:
|
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// Check to see if connection was established.
|
381 |
result = TFTPIsOpened();
|
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if ( result == TFTP_OK )
|
383 |
// ARP is resolved and UDP port is opened.
|
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// Now we are ready for future TFTP commands.
|
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smTFTPDemo = SM_TFTP_DEMO_READY;
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else if ( result == TFTP_TIMEOUT )
|
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// Timeout has occured.
|
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// Application may decide to count attempts and give-up after
|
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// so many retries or as in this case, continue to try forever.
|
391 |
// We must have resolved server IP address or else nothing
|
392 |
// can be done.
|
393 |
smTFTPDemo = SM_TFTP_DEMO_IDLE;
|
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break;
|
395 |
|
396 |
case SM_TFTP_DEMO_READY:
|
397 |
// Scan for RB5 switch.
|
398 |
if ( PORTB_RB5 == 0 )
|
399 |
{
|
400 |
// RB5 was pushed. Decide if this is first push or second push
|
401 |
// and perform appropriate command.
|
402 |
|
403 |
// Blank out TFTP command display line in LCD.
|
404 |
XLCDGoto(TFTP_COMMAND_DISPLAY_LINE, 0);
|
405 |
XLCDPutROMString(blankLCDLine);
|
406 |
XLCDGoto(TFTP_COMMAND_DISPLAY_LINE, 0);
|
407 |
|
408 |
if ( tftpDemoFlag.bits.bFirstPush )
|
409 |
{
|
410 |
// For first push, perform PUT operation.
|
411 |
XLCDPutROMString(tftpPutString);
|
412 |
smTFTPDemo = SM_TFTP_DEMO_WRITE;
|
413 |
}
|
414 |
|
415 |
else
|
416 |
{
|
417 |
// On second push, perform GET operation.
|
418 |
XLCDPutROMString(tftpGetString);
|
419 |
smTFTPDemo = SM_TFTP_DEMO_READ;
|
420 |
}
|
421 |
|
422 |
}
|
423 |
break;
|
424 |
|
425 |
case SM_TFTP_DEMO_WRITE:
|
426 |
// Perform actual operation. This may take
|
427 |
// some time depending on file size and network condition.
|
428 |
// This function returns FALSE if has not finished or TRUE
|
429 |
// when it is finished - successful or failed.
|
430 |
if ( TFTPWrite() )
|
431 |
// Upon completion, we go back to monitoring switch.
|
432 |
smTFTPDemo = SM_TFTP_DEMO_CYCLE;
|
433 |
break;
|
434 |
|
435 |
case SM_TFTP_DEMO_READ:
|
436 |
// This function too may take time to finish.
|
437 |
if ( TFTPRead() )
|
438 |
// Read has finished, go back to monitoring switch.
|
439 |
smTFTPDemo = SM_TFTP_DEMO_CYCLE;
|
440 |
break;
|
441 |
|
442 |
case SM_TFTP_DEMO_CYCLE:
|
443 |
// Wait for switch to be released.
|
444 |
if ( PORTB_RB5 == 1 )
|
445 |
{
|
446 |
// Remember what push this is.
|
447 |
tftpDemoFlag.bits.bFirstPush = !tftpDemoFlag.bits.bFirstPush;
|
448 |
|
449 |
// And go back to monitoring...
|
450 |
smTFTPDemo = SM_TFTP_DEMO_READY;
|
451 |
}
|
452 |
break;
|
453 |
}
|
454 |
}
|
455 |
|
456 |
|
457 |
// This is template function to perform TFTP Put operation.
|
458 |
// Most application should be able to take code from this function and
|
459 |
// perform TFTP Put operation.
|
460 |
// Remove/Enhance LCD related code as per your requirements.
|
461 |
//
|
462 |
// This function simply writes first 16KB of program memory to
|
463 |
// tftpwr.bin file.
|
464 |
static BOOL TFTPWrite(void)
|
465 |
{
|
466 |
BYTE v;
|
467 |
BOOL lbReturn;
|
468 |
TFTP_RESULT result;
|
469 |
|
470 |
// State machine state.
|
471 |
static enum
|
472 |
{
|
473 |
SM_TFTP_PUT_IDLE,
|
474 |
SM_TFTP_PUT_OPEN_FILE,
|
475 |
SM_TFTP_PUT_OPEN_FILE_WAIT,
|
476 |
SM_TFTP_PUT_DATA,
|
477 |
SM_TFTP_PUT_CLOSE_FILE_WAIT
|
478 |
} smTFTPPut = SM_TFTP_PUT_OPEN_FILE;
|
479 |
|
480 |
// Since we are writing a file, we must be prepared to resend
|
481 |
// last data block. these pointer will keep track of data block
|
482 |
static ROM BYTE *retryPtr;
|
483 |
static ROM BYTE *currentPtr;
|
484 |
BOOL lbIsBeginingOfBlock;
|
485 |
|
486 |
lbReturn = FALSE;
|
487 |
|
488 |
lbIsBeginingOfBlock = TRUE;
|
489 |
|
490 |
switch(smTFTPPut)
|
491 |
{
|
492 |
// Since this demo application has already opened TFTPOpen on startup, we
|
493 |
// do not need to do again. If application will be communicating with
|
494 |
// several TFTP servers, it would need to close and open connection with
|
495 |
// different servers. In that case for every TFTP operation, it must
|
496 |
// perform TFTPOpen and related sequence.
|
497 |
//
|
498 |
// In this case, we will simply start opening file.
|
499 |
#if 0
|
500 |
case SM_TFTP_PUT_IDLE:
|
501 |
TFTPOpen(&AppConfig.TFTPServerAddr);
|
502 |
smTFTPPut = SM_TFTP_PUT_WAIT;
|
503 |
break;
|
504 |
|
505 |
case SM_TFTP_PUT_WAIT:
|
506 |
result = TFTPIsOpened();
|
507 |
if ( result == TFTP_OK )
|
508 |
smTFTPPut = SM_TFTP_PUT_OPEN_FILE;
|
509 |
|
510 |
else if ( result == TFTP_RETRY )
|
511 |
smTFTPPut = SM_TFTP_PUT_IDLE;
|
512 |
|
513 |
break;
|
514 |
#endif
|
515 |
case SM_TFTP_PUT_OPEN_FILE:
|
516 |
// Make sure that it is okay to send file open request.
|
517 |
if ( TFTPIsFileOpenReady() )
|
518 |
{
|
519 |
// Initialize file data pointer.
|
520 |
currentPtr = (ROM BYTE*)0x0;
|
521 |
retryPtr = (ROM BYTE*)0x0;
|
522 |
|
523 |
// Issue file open request for WRITE access.
|
524 |
TFTPOpenFile(tftpFilePutName, TFTP_FILE_MODE_WRITE);
|
525 |
|
526 |
// Wait for it get accepted.
|
527 |
smTFTPPut = SM_TFTP_PUT_OPEN_FILE_WAIT;
|
528 |
}
|
529 |
break;
|
530 |
|
531 |
case SM_TFTP_PUT_OPEN_FILE_WAIT:
|
532 |
// Is file opened? or can we write to the file?
|
533 |
result = TFTPIsFileOpened();
|
534 |
if ( result == TFTP_OK )
|
535 |
// Yes. Start writing data.
|
536 |
smTFTPPut = SM_TFTP_PUT_DATA;
|
537 |
|
538 |
else if ( result == TFTP_RETRY )
|
539 |
// Somehow previous request for file open was not
|
540 |
// received by server or server simly did not
|
541 |
// respond. Try again...
|
542 |
smTFTPPut = SM_TFTP_PUT_OPEN_FILE;
|
543 |
|
544 |
break;
|
545 |
|
546 |
|
547 |
case SM_TFTP_PUT_DATA:
|
548 |
// Once it is okay to write data, as per TFTP spec.
|
549 |
// we can write up to 512 bytes of data in one block.
|
550 |
// Stay in loop and send all 512 bytes of data in one shot.
|
551 |
while(1)
|
552 |
{
|
553 |
// Must make sure that it is okay to put any more data.
|
554 |
// If block is fulled, this function will return TFTP_NOT_READY
|
555 |
// and we must wait.
|
556 |
result = TFTPIsPutReady();
|
557 |
if( result == TFTP_OK )
|
558 |
{
|
559 |
// If this is very first block put, remember retry pointer
|
560 |
// so that in case we need to retry it, we can simply
|
561 |
// reset the pointer and supply retry data.
|
562 |
if ( lbIsBeginingOfBlock )
|
563 |
{
|
564 |
lbIsBeginingOfBlock = FALSE;
|
565 |
retryPtr = currentPtr;
|
566 |
}
|
567 |
|
568 |
// Get data byte that we want to write.
|
569 |
v = *currentPtr++;
|
570 |
|
571 |
// Check for end of data.
|
572 |
if ( currentPtr >= (ROM BYTE*)0x3FFFL )
|
573 |
{
|
574 |
// If end of data is reached, initiated FileClose.
|
575 |
TFTPCloseFile();
|
576 |
|
577 |
// Wait for file to get closed.
|
578 |
smTFTPPut = SM_TFTP_PUT_CLOSE_FILE_WAIT;
|
579 |
break;
|
580 |
}
|
581 |
else
|
582 |
// or else put it in block.
|
583 |
TFTPPut(v);
|
584 |
|
585 |
}
|
586 |
|
587 |
else if ( result == TFTP_RETRY )
|
588 |
{
|
589 |
// Retry last block.
|
590 |
currentPtr = retryPtr;
|
591 |
break;
|
592 |
}
|
593 |
|
594 |
else
|
595 |
// For all other returns, break out of this loop and
|
596 |
// let common logic at the end of function handle it.
|
597 |
break;
|
598 |
|
599 |
}
|
600 |
break;
|
601 |
|
602 |
case SM_TFTP_PUT_CLOSE_FILE_WAIT:
|
603 |
// Is file close request compelte?
|
604 |
result = TFTPIsFileClosed();
|
605 |
if ( result == TFTP_OK )
|
606 |
// Yes, Remember to return TRUE.
|
607 |
lbReturn = TRUE;
|
608 |
|
609 |
else if ( result == TFTP_RETRY )
|
610 |
{
|
611 |
// No. We need to retry.
|
612 |
// In this case, we need to send last data block again.
|
613 |
// and redo file close sequence.
|
614 |
currentPtr = retryPtr;
|
615 |
|
616 |
// Go back to PUT_DATA state.
|
617 |
smTFTPPut = SM_TFTP_PUT_DATA;
|
618 |
}
|
619 |
break;
|
620 |
}
|
621 |
|
622 |
// Common action to all states.
|
623 |
if ( result == TFTP_OK && lbReturn )
|
624 |
{
|
625 |
// Operation is complete and successful.
|
626 |
// For visual indication, display 'Y' on LCD first line.
|
627 |
XLCDGoto(TFTP_COMMAND_DISPLAY_LINE, TFTP_COMMAND_RESULT_POSITION);
|
628 |
XLCDPut('Y');
|
629 |
}
|
630 |
|
631 |
else if ( result == TFTP_TIMEOUT || result == TFTP_ERROR )
|
632 |
{
|
633 |
// Either timeout or error has occurred.
|
634 |
XLCDGoto(TFTP_COMMAND_DISPLAY_LINE, TFTP_COMMAND_RESULT_POSITION);
|
635 |
|
636 |
// Display 'T' for timeout
|
637 |
if ( result == TFTP_TIMEOUT )
|
638 |
XLCDPut('T');
|
639 |
else
|
640 |
// 'E' for error.
|
641 |
XLCDPut('E');
|
642 |
lbReturn = TRUE;
|
643 |
}
|
644 |
|
645 |
// If command is complete, reset the state machine.
|
646 |
if ( lbReturn )
|
647 |
smTFTPPut = SM_TFTP_PUT_OPEN_FILE;
|
648 |
|
649 |
return lbReturn;
|
650 |
}
|
651 |
|
652 |
|
653 |
|
654 |
// This is template function to perform TFTP Get operation.
|
655 |
// Most application should be able to take code from this function and
|
656 |
// perform TFTP Put operation.
|
657 |
// Remove/Enhance LCD related code as per your requirements.
|
658 |
//
|
659 |
// This function trie to read tftprd.txt file from remote server.
|
660 |
static BOOL TFTPRead(void)
|
661 |
{
|
662 |
BYTE v;
|
663 |
BOOL lbReturn;
|
664 |
TFTP_RESULT result;
|
665 |
|
666 |
// State machine states.
|
667 |
static enum
|
668 |
{
|
669 |
SM_TFTP_GET_IDLE,
|
670 |
SM_TFTP_GET_WAIT,
|
671 |
SM_TFTP_GET_OPEN_FILE,
|
672 |
SM_TFTP_GET_OPEN_FILE_WAIT,
|
673 |
SM_TFTP_GET_DATA
|
674 |
} smTFTPGet = SM_TFTP_GET_OPEN_FILE;
|
675 |
|
676 |
|
677 |
lbReturn = FALSE;
|
678 |
|
679 |
switch(smTFTPGet)
|
680 |
{
|
681 |
// Since this demo application has already opened TFTPOpen on startup, we
|
682 |
// do not need to do again. If application will be communicating with
|
683 |
// several TFTP servers, it would need to close and open connection with
|
684 |
// different servers. In that case for every TFTP operation, it must
|
685 |
// perform TFTPOpen and related sequence.
|
686 |
//
|
687 |
// In this case, we will simply start opening file.
|
688 |
#if 0
|
689 |
case SM_TFTP_GET_IDLE:
|
690 |
TFTPOpen(&AppConfig.TFTPServerAddr);
|
691 |
smTFTPGet = SM_TFTP_GET_WAIT;
|
692 |
break;
|
693 |
|
694 |
case SM_TFTP_GET_WAIT:
|
695 |
result = TFTPIsOpened();
|
696 |
if ( result == TFTP_OK
|
697 |
smTFTPGet = SM_TFTP_GET_OPEN_FILE;
|
698 |
|
699 |
else if ( result == TFTP_RETRY )
|
700 |
smTFTPGet = SM_TFTP_GET_IDLE;
|
701 |
break;
|
702 |
#endif
|
703 |
|
704 |
case SM_TFTP_GET_OPEN_FILE:
|
705 |
// Is is okay to issue file open?
|
706 |
if ( TFTPIsFileOpenReady() )
|
707 |
{
|
708 |
// Issue file open command.
|
709 |
// For read operation, there is no need to data retry. All retries
|
710 |
// are done automatically by module.
|
711 |
TFTPOpenFile(tftpFileGetName, TFTP_FILE_MODE_READ);
|
712 |
|
713 |
// Wait for file get opened.
|
714 |
smTFTPGet = SM_TFTP_GET_OPEN_FILE_WAIT;
|
715 |
}
|
716 |
break;
|
717 |
|
718 |
case SM_TFTP_GET_OPEN_FILE_WAIT:
|
719 |
// Is file opened?
|
720 |
result = TFTPIsFileOpened();
|
721 |
if ( result == TFTP_OK )
|
722 |
// Yes. Go and read the first data block.
|
723 |
smTFTPGet = SM_TFTP_GET_DATA;
|
724 |
|
725 |
else if ( result == TFTP_RETRY )
|
726 |
{
|
727 |
// Somehow fileopen was not acknowledged, try again.
|
728 |
smTFTPGet = SM_TFTP_GET_OPEN_FILE;
|
729 |
break;
|
730 |
}
|
731 |
else
|
732 |
break;
|
733 |
|
734 |
case SM_TFTP_GET_DATA:
|
735 |
// Once a data block is available, application may read up to 512 bytes
|
736 |
// of data. Read up to 512 bytes in one shot.
|
737 |
while(1)
|
738 |
{
|
739 |
// Make sure that it is okay to call TFTPGet. If all 512 bytes are
|
740 |
// read or if there is no more data byte, this function will return
|
741 |
// TFTP_NOT_READY.
|
742 |
result = TFTPIsGetReady();
|
743 |
if ( result == TFTP_OK )
|
744 |
{
|
745 |
// Fetch data byte.
|
746 |
// In this demo, it is simply ignored.
|
747 |
v = TFTPGet();
|
748 |
|
749 |
// One may output it so another port - for example UART.
|
750 |
//USARTPut(v);
|
751 |
}
|
752 |
else
|
753 |
break;
|
754 |
}
|
755 |
break;
|
756 |
}
|
757 |
|
758 |
// Common logic for all states.
|
759 |
if ( result == TFTP_END_OF_FILE )
|
760 |
{
|
761 |
// If end of file is reached, display it.
|
762 |
lbReturn = TRUE;
|
763 |
XLCDGoto(TFTP_COMMAND_DISPLAY_LINE, TFTP_COMMAND_RESULT_POSITION);
|
764 |
XLCDPut('Y');
|
765 |
}
|
766 |
|
767 |
else if ( result == TFTP_TIMEOUT || result == TFTP_ERROR )
|
768 |
{
|
769 |
lbReturn = TRUE;
|
770 |
XLCDGoto(TFTP_COMMAND_DISPLAY_LINE, TFTP_COMMAND_RESULT_POSITION);
|
771 |
|
772 |
// For timeout, display 'T'
|
773 |
if ( result == TFTP_TIMEOUT )
|
774 |
XLCDPut('T');
|
775 |
else
|
776 |
// an for error, display 'E'
|
777 |
XLCDPut('E');
|
778 |
}
|
779 |
|
780 |
// On completion of command, reset the state machine.
|
781 |
if ( lbReturn )
|
782 |
smTFTPGet = SM_TFTP_GET_OPEN_FILE;
|
783 |
|
784 |
return lbReturn;
|
785 |
}
|
786 |
|
787 |
|
788 |
|
789 |
|
790 |
|
791 |
|
792 |
|
793 |
#if defined(MCHP_C18)
|
794 |
#pragma interrupt HighISR save=section(".tmpdata")
|
795 |
void HighISR(void)
|
796 |
#elif defined(HITECH_C18)
|
797 |
#if defined(STACK_USE_SLIP)
|
798 |
extern void MACISR(void);
|
799 |
#endif
|
800 |
void interrupt HighISR(void)
|
801 |
#endif
|
802 |
{
|
803 |
TickUpdate();
|
804 |
|
805 |
#if defined(STACK_USE_SLIP)
|
806 |
MACISR();
|
807 |
#endif
|
808 |
}
|
809 |
|
810 |
#if defined(MCHP_C18)
|
811 |
#pragma code highVector=0x08
|
812 |
void HighVector (void)
|
813 |
{
|
814 |
_asm goto HighISR _endasm
|
815 |
}
|
816 |
#pragma code /* return to default code section */
|
817 |
#endif
|
818 |
|
819 |
|
820 |
|
821 |
|
822 |
static void DisplayIPValue(IP_ADDR *IPVal, BOOL bToLCD)
|
823 |
{
|
824 |
char IPDigit[8];
|
825 |
|
826 |
if ( bToLCD )
|
827 |
{
|
828 |
/*
|
829 |
* Erase second line.
|
830 |
*/
|
831 |
XLCDGoto(1, 0);
|
832 |
XLCDPutROMString(blankLCDLine);
|
833 |
|
834 |
}
|
835 |
|
836 |
/*
|
837 |
* Rewrite the second line.
|
838 |
*/
|
839 |
XLCDGoto(1, 0);
|
840 |
|
841 |
itoa(IPVal->v[0], IPDigit);
|
842 |
if ( bToLCD )
|
843 |
{
|
844 |
XLCDPutString(IPDigit);
|
845 |
XLCDPut('.');
|
846 |
}
|
847 |
else
|
848 |
{
|
849 |
USARTPutString((BYTE*)IPDigit);
|
850 |
USARTPut('.');
|
851 |
}
|
852 |
|
853 |
itoa(IPVal->v[1], IPDigit);
|
854 |
if ( bToLCD )
|
855 |
{
|
856 |
XLCDPutString(IPDigit);
|
857 |
XLCDPut('.');
|
858 |
}
|
859 |
else
|
860 |
{
|
861 |
USARTPutString((BYTE*)IPDigit);
|
862 |
USARTPut('.');
|
863 |
}
|
864 |
|
865 |
itoa(IPVal->v[2], IPDigit);
|
866 |
if ( bToLCD )
|
867 |
{
|
868 |
XLCDPutString(IPDigit);
|
869 |
XLCDPut('.');
|
870 |
}
|
871 |
else
|
872 |
{
|
873 |
USARTPutString((BYTE*)IPDigit);
|
874 |
USARTPut('.');
|
875 |
}
|
876 |
|
877 |
itoa(IPVal->v[3], IPDigit);
|
878 |
if ( bToLCD )
|
879 |
XLCDPutString(IPDigit);
|
880 |
else
|
881 |
USARTPutString((BYTE*)IPDigit);
|
882 |
}
|
883 |
|
884 |
/*********************************************************************
|
885 |
* Function: void InitializeBoard(void)
|
886 |
*
|
887 |
* PreCondition: None
|
888 |
*
|
889 |
* Input: None
|
890 |
*
|
891 |
* Output: None
|
892 |
*
|
893 |
* Side Effects: None
|
894 |
*
|
895 |
* Overview: Initialize board specific hardware.
|
896 |
*
|
897 |
* Note: None
|
898 |
********************************************************************/
|
899 |
static void InitializeBoard(void)
|
900 |
{
|
901 |
/*
|
902 |
* Setup for PORTA.RA0 as analog input while rests
|
903 |
* as digital i/o lines.
|
904 |
*/
|
905 |
ADCON1 = 0b10001110; // RA0 as analog input, Right justified
|
906 |
TRISA = 0x03;
|
907 |
|
908 |
/*
|
909 |
* LCD is enabled using RA5.
|
910 |
*/
|
911 |
PORTA_RA5 = 0; // Disable LCD.
|
912 |
|
913 |
/*
|
914 |
* Turn off the LED's.
|
915 |
*/
|
916 |
LATA2 = 1;
|
917 |
LATA3 = 1;
|
918 |
|
919 |
/*
|
920 |
* External data EEPROM needs pull-ups, so enable internal
|
921 |
* pull-ups.
|
922 |
*/
|
923 |
INTCON2_RBPU = 0;
|
924 |
|
925 |
XLCDInit();
|
926 |
XLCDGoto(0, 0);
|
927 |
XLCDPutROMString(StartupMsg);
|
928 |
|
929 |
|
930 |
TXSTA = 0b00100000; // Low BRG speed
|
931 |
RCSTA = 0b10010000;
|
932 |
SPBRG = SPBRG_VAL;
|
933 |
|
934 |
T0CON = 0;
|
935 |
INTCON_GIEH = 1;
|
936 |
INTCON_GIEL = 1;
|
937 |
|
938 |
}
|
939 |
|
940 |
/*********************************************************************
|
941 |
* Function: void InitAppConfig(void)
|
942 |
*
|
943 |
* PreCondition: MPFSInit() is already called.
|
944 |
*
|
945 |
* Input: None
|
946 |
*
|
947 |
* Output: Write/Read non-volatile config variables.
|
948 |
*
|
949 |
* Side Effects: None
|
950 |
*
|
951 |
* Overview: None
|
952 |
*
|
953 |
* Note: None
|
954 |
********************************************************************/
|
955 |
static void InitAppConfig(void)
|
956 |
{
|
957 |
#if defined(MPFS_USE_EEPROM)
|
958 |
BYTE c;
|
959 |
BYTE *p;
|
960 |
#endif
|
961 |
|
962 |
/*
|
963 |
* Load default configuration into RAM.
|
964 |
*/
|
965 |
AppConfig.MyIPAddr.v[0] = MY_DEFAULT_IP_ADDR_BYTE1;
|
966 |
AppConfig.MyIPAddr.v[1] = MY_DEFAULT_IP_ADDR_BYTE2;
|
967 |
AppConfig.MyIPAddr.v[2] = MY_DEFAULT_IP_ADDR_BYTE3;
|
968 |
AppConfig.MyIPAddr.v[3] = MY_DEFAULT_IP_ADDR_BYTE4;
|
969 |
|
970 |
AppConfig.MyMask.v[0] = MY_DEFAULT_MASK_BYTE1;
|
971 |
AppConfig.MyMask.v[1] = MY_DEFAULT_MASK_BYTE2;
|
972 |
AppConfig.MyMask.v[2] = MY_DEFAULT_MASK_BYTE3;
|
973 |
AppConfig.MyMask.v[3] = MY_DEFAULT_MASK_BYTE4;
|
974 |
|
975 |
AppConfig.MyGateway.v[0] = MY_DEFAULT_GATE_BYTE1;
|
976 |
AppConfig.MyGateway.v[1] = MY_DEFAULT_GATE_BYTE2;
|
977 |
AppConfig.MyGateway.v[2] = MY_DEFAULT_GATE_BYTE3;
|
978 |
AppConfig.MyGateway.v[3] = MY_DEFAULT_GATE_BYTE4;
|
979 |
|
980 |
AppConfig.MyMACAddr.v[0] = MY_DEFAULT_MAC_BYTE1;
|
981 |
AppConfig.MyMACAddr.v[1] = MY_DEFAULT_MAC_BYTE2;
|
982 |
AppConfig.MyMACAddr.v[2] = MY_DEFAULT_MAC_BYTE3;
|
983 |
AppConfig.MyMACAddr.v[3] = MY_DEFAULT_MAC_BYTE4;
|
984 |
AppConfig.MyMACAddr.v[4] = MY_DEFAULT_MAC_BYTE5;
|
985 |
AppConfig.MyMACAddr.v[5] = MY_DEFAULT_MAC_BYTE6;
|
986 |
|
987 |
#if defined(STACK_USE_DHCP) || defined(STACK_USE_IP_GLEANING)
|
988 |
AppConfig.Flags.bIsDHCPEnabled = TRUE;
|
989 |
#else
|
990 |
AppConfig.Flags.bIsDHCPEnabled = FALSE;
|
991 |
#endif
|
992 |
|
993 |
#if defined(MPFS_USE_EEPROM)
|
994 |
p = (BYTE*)&AppConfig;
|
995 |
|
996 |
|
997 |
XEEBeginRead(EEPROM_CONTROL, 0x00);
|
998 |
c = XEERead();
|
999 |
XEEEndRead();
|
1000 |
|
1001 |
/*
|
1002 |
* When a record is saved, first byte is written as 0x55 to indicate
|
1003 |
* that a valid record was saved.
|
1004 |
*/
|
1005 |
if ( c == 0x55 )
|
1006 |
{
|
1007 |
XEEBeginRead(EEPROM_CONTROL, 0x01);
|
1008 |
for ( c = 0; c < sizeof(AppConfig); c++ )
|
1009 |
*p++ = XEERead();
|
1010 |
XEEEndRead();
|
1011 |
}
|
1012 |
else
|
1013 |
SaveAppConfig();
|
1014 |
#endif
|
1015 |
}
|
1016 |
|
1017 |
#if defined(MPFS_USE_EEPROM)
|
1018 |
static void SaveAppConfig(void)
|
1019 |
{
|
1020 |
BYTE c;
|
1021 |
BYTE *p;
|
1022 |
|
1023 |
p = (BYTE*)&AppConfig;
|
1024 |
XEEBeginWrite(EEPROM_CONTROL, 0x00);
|
1025 |
XEEWrite(0x55);
|
1026 |
for ( c = 0; c < sizeof(AppConfig); c++ )
|
1027 |
{
|
1028 |
XEEWrite(*p++);
|
1029 |
}
|
1030 |
|
1031 |
XEEEndWrite();
|
1032 |
}
|
1033 |
#endif
|
1034 |
|
1035 |
|
1036 |
ROM char menu[] =
|
1037 |
"\r\n\r\n\r\MCHPStack TFTP Client Demo 1.0 ("STARTUP_MSG", " __DATE__ ")\r\n\r\n"
|
1038 |
|
1039 |
"\t1: Change Board serial number.\r\n"
|
1040 |
"\t2: Change default IP address.\r\n"
|
1041 |
"\t3: Change default gateway address.\r\n"
|
1042 |
"\t4: Change default subnet mask.\r\n"
|
1043 |
"\t5: Enable DHCP & IP Gleaning.\r\n"
|
1044 |
"\t6: Disable DHCP & IP Gleaning.\r\n"
|
1045 |
"\t7: Set TFTP Server IP address:\r\n"
|
1046 |
"\t8: Save & Quit.\r\n"
|
1047 |
"\r\n"
|
1048 |
"Enter a menu choice (1-8): ";
|
1049 |
|
1050 |
typedef enum _MENU_CMD
|
1051 |
{
|
1052 |
MENU_CMD_SERIAL_NUMBER = '1',
|
1053 |
MENU_CMD_IP_ADDRESS,
|
1054 |
MENU_CMD_GATEWAY_ADDRESS,
|
1055 |
MENU_CMD_SUBNET_MASK,
|
1056 |
MENU_CMD_ENABLE_AUTO_CONFIG,
|
1057 |
MENU_CMD_DISABLE_AUTO_CONFIG,
|
1058 |
MENU_CMD_TFTP_SERVER_ADDRESS,
|
1059 |
MENU_CMD_QUIT,
|
1060 |
MENU_CMD_INVALID
|
1061 |
} MENU_CMD;
|
1062 |
|
1063 |
ROM char* menuCommandPrompt[] =
|
1064 |
{
|
1065 |
"\r\nSerial Number (",
|
1066 |
"\r\nDefault IP Address (",
|
1067 |
"\r\nDefault Gateway Address (",
|
1068 |
"\r\nDefault Subnet Mask (",
|
1069 |
"\r\nDHCP & IP Gleaning enabled.\r\n",
|
1070 |
"\r\nDHCP & IP Gleaning disabled.\r\n",
|
1071 |
"\r\nTFTP Serer IP Address (",
|
1072 |
"\r\nNow running application..."
|
1073 |
};
|
1074 |
|
1075 |
ROM char InvalidInputMsg[] = "\r\nInvalid input received - Input ignored.\r\n"
|
1076 |
"Press any key to continue...\r\n";
|
1077 |
|
1078 |
void USARTPutROMString(ROM char* str)
|
1079 |
{
|
1080 |
BYTE v;
|
1081 |
|
1082 |
while( v = *str++ )
|
1083 |
USARTPut(v);
|
1084 |
}
|
1085 |
|
1086 |
|
1087 |
BYTE USARTGetString(char *buffer, BYTE bufferLen)
|
1088 |
{
|
1089 |
BYTE v;
|
1090 |
BYTE count;
|
1091 |
|
1092 |
count = 0;
|
1093 |
do
|
1094 |
{
|
1095 |
while( !USARTIsGetReady() );
|
1096 |
|
1097 |
v = USARTGet();
|
1098 |
|
1099 |
if ( v == '\r' || v == '\n' )
|
1100 |
break;
|
1101 |
|
1102 |
count++;
|
1103 |
*buffer++ = v;
|
1104 |
*buffer = '\0';
|
1105 |
if ( bufferLen-- == 0 )
|
1106 |
break;
|
1107 |
} while(1);
|
1108 |
return count;
|
1109 |
}
|
1110 |
|
1111 |
BOOL StringToIPAddress(char *str, IP_ADDR *buffer)
|
1112 |
{
|
1113 |
BYTE v;
|
1114 |
char *temp;
|
1115 |
BYTE byteIndex;
|
1116 |
|
1117 |
temp = str;
|
1118 |
byteIndex = 0;
|
1119 |
|
1120 |
while( v = *str )
|
1121 |
{
|
1122 |
if ( v == '.' )
|
1123 |
{
|
1124 |
*str++ = '\0';
|
1125 |
buffer->v[byteIndex++] = atoi(temp);
|
1126 |
temp = str;
|
1127 |
}
|
1128 |
else if ( v < '0' || v > '9' )
|
1129 |
return FALSE;
|
1130 |
|
1131 |
str++;
|
1132 |
}
|
1133 |
|
1134 |
buffer->v[byteIndex] = atoi(temp);
|
1135 |
|
1136 |
return (byteIndex == 3);
|
1137 |
}
|
1138 |
|
1139 |
|
1140 |
|
1141 |
MENU_CMD GetMenuChoice(void)
|
1142 |
{
|
1143 |
BYTE c;
|
1144 |
|
1145 |
while ( !USARTIsGetReady() );
|
1146 |
|
1147 |
c = USARTGet();
|
1148 |
|
1149 |
if ( c >= '1' && c < MENU_CMD_INVALID )
|
1150 |
return c;
|
1151 |
else
|
1152 |
return MENU_CMD_INVALID;
|
1153 |
}
|
1154 |
|
1155 |
#define MAX_USER_RESPONSE_LEN (20)
|
1156 |
void ExecuteMenuChoice(MENU_CMD choice)
|
1157 |
{
|
1158 |
char response[MAX_USER_RESPONSE_LEN];
|
1159 |
IP_ADDR tempIPValue;
|
1160 |
IP_ADDR *destIPValue;
|
1161 |
|
1162 |
USARTPut('\r');
|
1163 |
USARTPut('\n');
|
1164 |
USARTPutROMString(menuCommandPrompt[choice-'0'-1]);
|
1165 |
|
1166 |
switch(choice)
|
1167 |
{
|
1168 |
case MENU_CMD_SERIAL_NUMBER:
|
1169 |
itoa(AppConfig.SerialNumber.Val, response);
|
1170 |
USARTPutString((BYTE*)response);
|
1171 |
USARTPut(')');
|
1172 |
USARTPut(':');
|
1173 |
USARTPut(' ');
|
1174 |
|
1175 |
if ( USARTGetString(response, sizeof(response)) )
|
1176 |
{
|
1177 |
AppConfig.SerialNumber.Val = atoi(response);
|
1178 |
|
1179 |
AppConfig.MyMACAddr.v[4] = AppConfig.SerialNumber.v[1];
|
1180 |
AppConfig.MyMACAddr.v[5] = AppConfig.SerialNumber.v[0];
|
1181 |
}
|
1182 |
else
|
1183 |
goto HandleInvalidInput;
|
1184 |
|
1185 |
break;
|
1186 |
|
1187 |
case MENU_CMD_IP_ADDRESS:
|
1188 |
destIPValue = &AppConfig.MyIPAddr;
|
1189 |
goto ReadIPConfig;
|
1190 |
|
1191 |
case MENU_CMD_GATEWAY_ADDRESS:
|
1192 |
destIPValue = &AppConfig.MyGateway;
|
1193 |
goto ReadIPConfig;
|
1194 |
|
1195 |
case MENU_CMD_SUBNET_MASK:
|
1196 |
destIPValue = &AppConfig.MyMask;
|
1197 |
|
1198 |
ReadIPConfig:
|
1199 |
DisplayIPValue(destIPValue, FALSE);
|
1200 |
USARTPut(')');
|
1201 |
USARTPut(':');
|
1202 |
USARTPut(' ');
|
1203 |
|
1204 |
USARTGetString(response, sizeof(response));
|
1205 |
|
1206 |
if ( !StringToIPAddress(response, &tempIPValue) )
|
1207 |
{
|
1208 |
HandleInvalidInput:
|
1209 |
USARTPutROMString(InvalidInputMsg);
|
1210 |
while( !USARTIsGetReady() );
|
1211 |
USARTGet();
|
1212 |
}
|
1213 |
else
|
1214 |
{
|
1215 |
destIPValue->Val = tempIPValue.Val;
|
1216 |
}
|
1217 |
break;
|
1218 |
|
1219 |
|
1220 |
case MENU_CMD_ENABLE_AUTO_CONFIG:
|
1221 |
AppConfig.Flags.bIsDHCPEnabled = TRUE;
|
1222 |
break;
|
1223 |
|
1224 |
case MENU_CMD_DISABLE_AUTO_CONFIG:
|
1225 |
AppConfig.Flags.bIsDHCPEnabled = FALSE;
|
1226 |
break;
|
1227 |
|
1228 |
case MENU_CMD_TFTP_SERVER_ADDRESS:
|
1229 |
destIPValue = &AppConfig.TFTPServerAddr;
|
1230 |
goto ReadIPConfig;
|
1231 |
|
1232 |
case MENU_CMD_QUIT:
|
1233 |
SaveAppConfig();
|
1234 |
break;
|
1235 |
}
|
1236 |
}
|
1237 |
|
1238 |
|
1239 |
|
1240 |
|
1241 |
static void SetConfig(void)
|
1242 |
{
|
1243 |
MENU_CMD choice;
|
1244 |
|
1245 |
do
|
1246 |
{
|
1247 |
USARTPutROMString(menu);
|
1248 |
choice = GetMenuChoice();
|
1249 |
if ( choice != MENU_CMD_INVALID )
|
1250 |
ExecuteMenuChoice(choice);
|
1251 |
} while(choice != MENU_CMD_QUIT);
|
1252 |
|
1253 |
}
|
1254 |
|
1255 |
|
1256 |
static void USARTPut(BYTE c)
|
1257 |
{
|
1258 |
while( !TXSTA_TRMT);
|
1259 |
TXREG = c;
|
1260 |
}
|
1261 |
|
1262 |
static void USARTPutString(BYTE *s)
|
1263 |
{
|
1264 |
BYTE c;
|
1265 |
|
1266 |
while( (c = *s++) )
|
1267 |
USARTPut(c);
|
1268 |
}
|
1269 |
|
1270 |
void XLCDDelay15ms(void)
|
1271 |
{
|
1272 |
DelayMs(15);
|
1273 |
}
|
1274 |
void XLCDDelay4ms(void)
|
1275 |
{
|
1276 |
DelayMs(4);
|
1277 |
}
|
1278 |
|
1279 |
void XLCDDelay100us(void)
|
1280 |
{
|
1281 |
INTCON_GIEH = 0;
|
1282 |
Delay10us(1);
|
1283 |
INTCON_GIEH = 1;
|
1284 |
}
|