unsigned char Send(unsigned char sock, const unsigned char *buf,
unsigned int buflen)
{
unsigned int ptr;
unsigned int offaddr;
unsigned int realaddr;
unsigned int txsize;
unsigned int timeout;
unsigned int sockaddr;
if (buflen == 0 || sock >= W5100_NUM_SOCKETS)
return W5100_FAIL; // ignore illegal requests
sockaddr = W5100_SKT_BASE(sock); // calc base addr for this socket
// Make sure the TX Free Size Register is available
txsize = W51_read(sockaddr + W5100_TX_FSR_OFFSET); // make sure the TX free-size reg is available
txsize =
(((txsize & 0x00FF) << 8) +
W51_read(sockaddr + W5100_TX_FSR_OFFSET + 1));
timeout = 0;
while (txsize < buflen) {
_delay_ms(1);
txsize = W51_read(sockaddr + W5100_TX_FSR_OFFSET); // make sure the TX free-size reg is available
txsize =
(((txsize & 0x00FF) << 8) +
W51_read(sockaddr + W5100_TX_FSR_OFFSET + 1));
if (timeout++ > 1000) // if max delay has passed...
{
DisconnectSocket(sock); // can't connect, close it down
return W5100_FAIL; // show failure
}
}
// Read the Tx Write Pointer
ptr = W51_read(sockaddr + W5100_TX_WR_OFFSET);
offaddr =
(((ptr & 0x00FF) << 8) +
W51_read(sockaddr + W5100_TX_WR_OFFSET + 1));
while (buflen) {
buflen--;
realaddr = (W5100_TXBUFADDR + (0x0800 * sock)) + (offaddr & W5100_TX_BUF_MASK); // calc W5100 physical buffer addr for this socket
W51_write(realaddr, *buf); // send a byte of application data to TX buffer
offaddr++; // next TX buffer addr
buf++; // next input buffer addr
}
W51_write(sockaddr + W5100_TX_WR_OFFSET, (offaddr & 0xFF00) >> 8); // send MSB of new write-pointer addr
W51_write(sockaddr + W5100_TX_WR_OFFSET + 1, (offaddr & 0x00FF)); // send LSB
W51_write(sockaddr + W5100_CR_OFFSET, W5100_SKT_CR_SEND); // start the send on its way
while (W51_read(sockaddr + W5100_CR_OFFSET)) ; // loop until socket starts the send (blocks!!)
return W5100_OK;
}
int testserver(void) {
unsigned int sockaddr;
unsigned char mysocket;
unsigned int rsize;
mysocket = 0; // magic number! declare the socket number we will use (0-3)
sockaddr = 0x400;//W5100_SKT_BASE(mysocket); // calc address of W5100 register set for this socket
/*
* The main loop. Control stays in this loop forever, processing any received packets
* and sending any requested data.
*/
while (1) {
LATAbits.LATA0 ^= 1;
int x = w5100_read(sockaddr + W5100_SR_OFFSET);
switch (x) // based on current status of socket...
{
case W5100_SKT_SR_CLOSED: // if socket is closed...
LATBbits.LATB8 = 0;
if (OpenSocket(mysocket, W5100_SKT_MR_TCP, HTTP_PORT) == mysocket) // if successful opening a socket...
{
Listen(mysocket);
__delay_ms(1);
}
break;
case W5100_SKT_SR_ESTABLISHED: // if socket connection is established...
LATBbits.LATB8 = 1;
rsize = ReceivedSize(mysocket); // find out how many bytes
if (rsize > 0) {
if (Receive(mysocket, buf, rsize) != W5100_OK) break; // if we had problems, all done
/*
* Add code here to process the payload from the packet.
*
* For now, we just ignore the payload and send a canned HTML page so the client at least
* knows we are alive.
*/
strcpy((char *) buf, "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nPragma: no-cache\r\n\r\n");
strcat((char *) buf, "<html>\r\n<body>\r\n");
strcat((char *) buf, "<title>Phil's W5100 web server (ATmega644p)</title>\r\n");
strcat((char *) buf, "<h2>Phil's ATmega644p web server using Wiznet W5100 chip</h2>\r\n");
strcat((char *) buf, "<br /><hr>\r\n");
if (Send(mysocket, buf, strlen((char *) buf)) == W5100_FAIL) break; // just throw out the packet for now
strcpy((char *) buf, "This is part 2 of the page.");
strcat((char *) buf, "</body>\r\n</html>\r\n");
if (Send(mysocket, buf, strlen((char *) buf)) == W5100_FAIL) break; // just throw out the packet for now
DisconnectSocket(mysocket);
} else // no data yet...
{
__delay_us(10);
}
break;
case W5100_SKT_SR_FIN_WAIT:
case W5100_SKT_SR_CLOSING:
case W5100_SKT_SR_TIME_WAIT:
case W5100_SKT_SR_CLOSE_WAIT:
case W5100_SKT_SR_LAST_ACK:
CloseSocket(mysocket);
break;
}
}
return 0;
}
int main(void)
{
unsigned int sockaddr;
unsigned char mysocket;
unsigned int rsize;
/* Initialize the UART for ATmega168 96008N1 */
uart_init();
stdout = &uart_stdout; //Required for printf init
mysocket = 0; // magic number! declare the socket number we will us
sockaddr = W5100_SKT_BASE(mysocket); // calc address of W5100 register set for this socket
puts("AVR Ethernet\r\n");
/*
* Initialize the ATmega168 SPI subsystem
*/
CS_PORT |= (1 << CS_BIT); // pull CS pin high
CS_DDR |= (1 << CS_BIT); // now make it an output
SPI_PORT = SPI_PORT | (1 << PORTB2); // make sure SS is high
SPI_DDR = (1 << PORTB3) | (1 << PORTB5) | (1 << PORTB2); // set MOSI, SCK and SS as output, others as input
SPCR = (1 << SPE) | (1 << MSTR); // enable SPI, master mode 0
SPSR |= (1 << SPI2X); // set the clock rate fck/2
/*
* Load up the callback block, then initialize the Wiznet W5100
*/
my_callbacks._select = &my_select; // callback for selecting the W5100
my_callbacks._xchg = &my_xchg; // callback for exchanging data
my_callbacks._deselect = &my_deselect; // callback for deselecting the W5100
my_callbacks._reset = &my_reset; // callback for hardware-reset of the W5100
W51_register(&my_callbacks); // register our target-specific W5100 routines with the W5100 library
W51_init(); // now initialize the W5100
/*
* Configure the W5100 device to handle PING requests.
* This requires configuring the chip, not a specific socket.
*/
W51_config(&my_cfg); // config the W5100 (MAC, TCP address, subnet, etc
puts("Debug: AVR Ethernet after W5100 config\r\n");
/*
* The main loop. Control stays in this loop forever, processing any received packets
* and sending any requested data.
*/
while (1) {
switch (W51_read(sockaddr + W5100_SR_OFFSET)) // based on current status of socket...
{
case W5100_SKT_SR_CLOSED: // if socket is closed...
if (OpenSocket(mysocket, W5100_SKT_MR_TCP, HTTP_PORT) == mysocket) // if successful opening a socket...
{
Listen(mysocket);
_delay_ms(1);
}
break;
case W5100_SKT_SR_ESTABLISHED: // if socket connection is established...
rsize = ReceivedSize(mysocket); // find out how many bytes
if (rsize > 0) {
if (Receive(mysocket, buf, rsize) != W5100_OK)
break; // if we had problems, all done
/*
* Add code here to process the payload from the packet.
*
* For now, we just ignore the payload and send a canned HTML page so the client at least
* knows we are alive.
*/
strcpy_P((char *)buf,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nPragma: no-cache\r\n\r\n"));
strcat_P((char *)buf,PSTR("<html>\r\n<body>\r\n"));
strcat_P((char *)buf,PSTR("<title>Title</title>\r\n"));
strcat_P((char *)buf,PSTR("<p>Hello world</p>\r\n"));
strcat_P((char *)buf,PSTR("</body>\r\n</html>\r\n"));
if (Send(mysocket, buf, strlen((char *)buf)) == W5100_FAIL) break; // just throw out the packet for now
DisconnectSocket(mysocket);
} else // no data yet...
{
_delay_us(10);
}
break;
case W5100_SKT_SR_FIN_WAIT:
case W5100_SKT_SR_CLOSING:
case W5100_SKT_SR_TIME_WAIT:
case W5100_SKT_SR_CLOSE_WAIT:
case W5100_SKT_SR_LAST_ACK:
CloseSocket(mysocket);
break;
}
}
return 0;
}
