diff options
| author | Jesse Morgan <jesse@jesterpm.net> | 2011-10-20 22:16:19 -0700 |
|---|---|---|
| committer | Jesse Morgan <jesse@jesterpm.net> | 2011-10-20 22:16:19 -0700 |
| commit | fc944ff979dbbd49a57722fe2d1d2acf47312eb4 (patch) | |
| tree | 38cc3a5c5c8f24f55068fc4ffa73d018169fc2df /libraries/Ethernet/utility/w5100.cpp | |
Inital commit... halfway through the project
Diffstat (limited to 'libraries/Ethernet/utility/w5100.cpp')
| -rw-r--r-- | libraries/Ethernet/utility/w5100.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/libraries/Ethernet/utility/w5100.cpp b/libraries/Ethernet/utility/w5100.cpp new file mode 100644 index 0000000..431a68d --- /dev/null +++ b/libraries/Ethernet/utility/w5100.cpp @@ -0,0 +1,182 @@ +/*
+ * 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, uint8_t *data, uint16_t len)
+{
+ uint16_t ptr = readSnTX_WR(s);
+
+ 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, 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))
+ ;
+}
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