1 files changed, 188 insertions, 0 deletions
diff --git a/libraries/Ethernet/utility/w5100.cpp b/libraries/Ethernet/utility/w5100.cpp
new file mode 100644
index 0000000..aafabae
--- /dev/null
+++ b/libraries/Ethernet/utility/w5100.cpp
@@ -0,0 +1,188 @@
+/*
+ * Copyright (c) 2010 by Cristian Maglie <c.maglie@bug.st>
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of either the GNU General Public License version 2
+ * or the GNU Lesser General Public License version 2.1, both as
+ * published by the Free Software Foundation.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <avr/interrupt.h>
+
+#include "w5100.h"
+
+// W5100 controller instance
+W5100Class W5100;
+
+#define TX_RX_MAX_BUF_SIZE 2048
+#define TX_BUF 0x1100
+#define RX_BUF (TX_BUF + TX_RX_MAX_BUF_SIZE)
+
+#define TXBUF_BASE 0x4000
+#define RXBUF_BASE 0x6000
+
+void W5100Class::init(void)
+{
+  delay(300);
+
+  SPI.begin();
+  initSS();
+  
+  writeMR(1<<RST);
+  writeTMSR(0x55);
+  writeRMSR(0x55);
+
+  for (int i=0; i<MAX_SOCK_NUM; i++) {
+    SBASE[i] = TXBUF_BASE + SSIZE * i;
+    RBASE[i] = RXBUF_BASE + RSIZE * i;
+  }
+}
+
+uint16_t W5100Class::getTXFreeSize(SOCKET s)
+{
+  uint16_t val=0, val1=0;
+  do {
+    val1 = readSnTX_FSR(s);
+    if (val1 != 0)
+      val = readSnTX_FSR(s);
+  } 
+  while (val != val1);
+  return val;
+}
+
+uint16_t W5100Class::getRXReceivedSize(SOCKET s)
+{
+  uint16_t val=0,val1=0;
+  do {
+    val1 = readSnRX_RSR(s);
+    if (val1 != 0)
+      val = readSnRX_RSR(s);
+  } 
+  while (val != val1);
+  return val;
+}
+
+
+void W5100Class::send_data_processing(SOCKET s, const uint8_t *data, uint16_t len)
+{
+  // This is same as having no offset in a call to send_data_processing_offset
+  send_data_processing_offset(s, 0, data, len);
+}
+
+void W5100Class::send_data_processing_offset(SOCKET s, uint16_t data_offset, const uint8_t *data, uint16_t len)
+{
+  uint16_t ptr = readSnTX_WR(s);
+  ptr += data_offset;
+  uint16_t offset = ptr & SMASK;
+  uint16_t dstAddr = offset + SBASE[s];
+
+  if (offset + len > SSIZE) 
+  {
+    // Wrap around circular buffer
+    uint16_t size = SSIZE - offset;
+    write(dstAddr, data, size);
+    write(SBASE[s], data + size, len - size);
+  } 
+  else {
+    write(dstAddr, data, len);
+  }
+
+  ptr += len;
+  writeSnTX_WR(s, ptr);
+}
+
+
+void W5100Class::recv_data_processing(SOCKET s, uint8_t *data, uint16_t len, uint8_t peek)
+{
+  uint16_t ptr;
+  ptr = readSnRX_RD(s);
+  read_data(s, (uint8_t *)ptr, data, len);
+  if (!peek)
+  {
+    ptr += len;
+    writeSnRX_RD(s, ptr);
+  }
+}
+
+void W5100Class::read_data(SOCKET s, volatile uint8_t *src, volatile uint8_t *dst, uint16_t len)
+{
+  uint16_t size;
+  uint16_t src_mask;
+  uint16_t src_ptr;
+
+  src_mask = (uint16_t)src & RMASK;
+  src_ptr = RBASE[s] + src_mask;
+
+  if( (src_mask + len) > RSIZE ) 
+  {
+    size = RSIZE - src_mask;
+    read(src_ptr, (uint8_t *)dst, size);
+    dst += size;
+    read(RBASE[s], (uint8_t *) dst, len - size);
+  } 
+  else
+    read(src_ptr, (uint8_t *) dst, len);
+}
+
+
+uint8_t W5100Class::write(uint16_t _addr, uint8_t _data)
+{
+  setSS();  
+  SPI.transfer(0xF0);
+  SPI.transfer(_addr >> 8);
+  SPI.transfer(_addr & 0xFF);
+  SPI.transfer(_data);
+  resetSS();
+  return 1;
+}
+
+uint16_t W5100Class::write(uint16_t _addr, const uint8_t *_buf, uint16_t _len)
+{
+  for (int i=0; i<_len; i++)
+  {
+    setSS();    
+    SPI.transfer(0xF0);
+    SPI.transfer(_addr >> 8);
+    SPI.transfer(_addr & 0xFF);
+    _addr++;
+    SPI.transfer(_buf[i]);
+    resetSS();
+  }
+  return _len;
+}
+
+uint8_t W5100Class::read(uint16_t _addr)
+{
+  setSS();  
+  SPI.transfer(0x0F);
+  SPI.transfer(_addr >> 8);
+  SPI.transfer(_addr & 0xFF);
+  uint8_t _data = SPI.transfer(0);
+  resetSS();
+  return _data;
+}
+
+uint16_t W5100Class::read(uint16_t _addr, uint8_t *_buf, uint16_t _len)
+{
+  for (int i=0; i<_len; i++)
+  {
+    setSS();
+    SPI.transfer(0x0F);
+    SPI.transfer(_addr >> 8);
+    SPI.transfer(_addr & 0xFF);
+    _addr++;
+    _buf[i] = SPI.transfer(0);
+    resetSS();
+  }
+  return _len;
+}
+
+void W5100Class::execCmdSn(SOCKET s, SockCMD _cmd) {
+  // Send command to socket
+  writeSnCR(s, _cmd);
+  // Wait for command to complete
+  while (readSnCR(s))
+    ;
+}