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/************************************************** ****************
***** *****
***** Name: easyweb.c *****
***** Ver.: 1.0 *****
***** Date: 07/05/2001 *****
***** Auth: Andreas Dannenberg *****
***** HTWK Leipzig *****
***** university of applied sciences *****
***** Germany *****
***** Func: implements a dynamic HTTP-server by using *****
***** the easyWEB-API *****
***** *****
************************************************** ****************/
#include
<stdlib.h>
#include
<stdio.h>
#include
<string.h>
#include
"LPC17xx.h"
#define
extern
#include
"easyweb.h"
#include
"type.h"
#include
"EMAC.h"
#include
"tcpip.h"
#include
"webpage.h")
unsigned
int pagecounter = 100;
unsigned
int adcValue = 0;
extern
void TCPClockHandler(void);
volatile
DWORD TimeTick = 0;
/* SysTick interrupt happens every 10 ms */
void
SysTick_Handler (void) {
TimeTick++;
if (TimeTick >= 20) {
TimeTick = 0;
LPC_GPIO2->FIOPIN ^= 1 << 0;
TCPClockHandler();
}
}
//void main(void)
int
main(void)
{
//InitOsc(); // Keil: No oscillator initialization necessary at this time.
//InitPorts(); // Keil: No port initialization necessary at this time.
SystemInit();
/* setup core clocks */
SysTick_Config(SystemFrequency/100);
/* Generate interrupt every 10 ms */
LPC_GPIO0->FIODIR |= 1 << 21;
// ÉèÖÃLEDÓÐЧ
LPC_GPIO0->FIOPIN |= 1 << 21;
LPC_GPIO2->FIODIR |= 1 << 0;
/* P2.0 defined as Output (LED) */
LPC_PINCON->PINSEL3 |= (3ul<<30);
/* P1.31 is AD0.5 */
LPC_SC->PCONP |= (1<<12);
/* Enable power to ADC block */
LPC_ADC->ADCR = (1<< 5) |
/* select AD0.5 pin */
(4<< 8) |
/* ADC clock is 25MHz/5 */
(1<<21);
/* enable ADC */
TCPLowLevelInit();
/*
*(unsigned char *)RemoteIP = 24; // uncomment those lines to get the
*((unsigned char *)RemoteIP + 1) = 8; // quote of the day from a real
*((unsigned char *)RemoteIP + 2) = 69; // internet server! (gateway must be
*((unsigned char *)RemoteIP + 3) = 7; // set to your LAN-router)
TCPLocalPort = 2025;
TCPRemotePort = TCP_PORT_QOTD;
TCPActiveOpen();
while (SocketStatus & SOCK_ACTIVE) // read the quote from memory
{ // by using the hardware-debugger
DoNetworkStuff();
}
*/
HTTPStatus = 0;
// clear HTTP-server's flag register
TCPLocalPort = TCP_PORT_HTTP;
// set port we want to listen to
while (1) // repeat forever
{
if (!(SocketStatus & SOCK_ACTIVE)) TCPPassiveOpen(); // listen for incoming TCP-connection
DoNetworkStuff();
// handle network and easyWEB-stack
// events
HTTPServer();
}
}
void
HTTPServer(void)
{
if (SocketStatus & SOCK_CONNECTED) // check if somebody has connected to our TCP
{
if (SocketStatus & SOCK_DATA_AVAILABLE) // check if remote TCP sent data
TCPReleaseRxBuffer();
// and throw it away
if (SocketStatus & SOCK_TX_BUF_RELEASED) // check if buffer is free for TX
{
if (!(HTTPStatus & HTTP_SEND_PAGE)) // init byte-counter and pointer to webside
{
// if called the 1st time
HTTPBytesToSend =
sizeof(WebSide) - 1; // get HTML length, ignore trailing zero
PWebSide = (
unsignedchar *)WebSide; // pointer to HTML-code
}
if (HTTPBytesToSend > MAX_TCP_TX_DATA_SIZE) // transmit a segment of MAX_SIZE
{
if (!(HTTPStatus & HTTP_SEND_PAGE)) // 1st time, include HTTP-header
{
memcpy(TCP_TX_BUF, GetResponse,
sizeof(GetResponse) - 1);
memcpy(TCP_TX_BUF + sizeof(GetResponse) - 1, PWebSide, MAX_TCP_TX_DATA_SIZE - sizeof(GetResponse) + 1);
HTTPBytesToSend -= MAX_TCP_TX_DATA_SIZE - sizeof(GetResponse) + 1;
PWebSide += MAX_TCP_TX_DATA_SIZE - sizeof(GetResponse) + 1;
}
else
{
memcpy(TCP_TX_BUF, PWebSide, MAX_TCP_TX_DATA_SIZE);
HTTPBytesToSend -= MAX_TCP_TX_DATA_SIZE;
PWebSide += MAX_TCP_TX_DATA_SIZE;
}
TCPTxDataCount = MAX_TCP_TX_DATA_SIZE;
// bytes to xfer
InsertDynamicValues();
// exchange some strings...
TCPTransmitTxBuffer();
// xfer buffer
}
elseif (HTTPBytesToSend) // transmit leftover bytes
{
memcpy(TCP_TX_BUF, PWebSide, HTTPBytesToSend);
TCPTxDataCount = HTTPBytesToSend;
// bytes to xfer
InsertDynamicValues();
// exchange some strings...
TCPTransmitTxBuffer();
// send last segment
TCPClose();
// and close connection
HTTPBytesToSend = 0;
// all data sent
}
HTTPStatus |= HTTP_SEND_PAGE;
// ok, 1st loop executed
}
}
else
HTTPStatus &= ~HTTP_SEND_PAGE;
// reset help-flag if not connected
}
// samples and returns the AD-converter value of channel 2
unsigned
int GetAD7Val(void)
{
// Keil: function replaced to handle LPC1768 A/D converter.
unsignedint val;
LPC_ADC->ADCR |= (1<<24); /* start conversion */
while (!(LPC_ADC->ADGDR & (1UL<<31))); /* Wait for Conversion end */
val = ((LPC_ADC->ADGDR >> 4) & 0xFFF);
/* read converted value */
LPC_ADC->ADCR &= ~(7<<24);
/* stop conversion */
return(val); /* result of A/D process */
}
//
void InsertDynamicValues(void)
{
unsignedchar *Key;
char NewKey[5];
unsignedint i;
if (TCPTxDataCount < 4) return; // there can't be any special string
Key = TCP_TX_BUF;
for (i = 0; i < (TCPTxDataCount - 3); i++)
{
if (*Key == 'A')
if (*(Key + 1) == 'D')
if (*(Key + 3) == '%')
switch (*(Key + 2))
{
case'8' : // "AD8%"?
{
adcValue = GetAD7Val();
// get AD value
sprintf(NewKey,
"0x%03X", adcValue); // insert AD converter value
memcpy(Key, NewKey, 5);
break;
}
case'7' : // "AD7%"?
{
sprintf(NewKey,
"%3u", (adcValue*100)/4024); // copy saved value from previous read
memcpy(Key, NewKey, 3);
break;
}
case'1' : // "AD1%"?
{
sprintf(NewKey,
"%3u", ++pagecounter); // increment and insert page counter
memcpy(Key, NewKey, 3);
*(Key + 3) =
' ';
break;
}
}
Key++;
}
}
Easy web
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