root / arduino-1.0 / libraries / Ethernet / utility / w5100.cpp @ 58d82c77
History | View | Annotate | Download (3.78 KB)
1 |
/*
|
---|---|
2 |
* Copyright (c) 2010 by Cristian Maglie <c.maglie@bug.st>
|
3 |
*
|
4 |
* This file is free software; you can redistribute it and/or modify
|
5 |
* it under the terms of either the GNU General Public License version 2
|
6 |
* or the GNU Lesser General Public License version 2.1, both as
|
7 |
* published by the Free Software Foundation.
|
8 |
*/
|
9 |
|
10 |
#include <stdio.h> |
11 |
#include <string.h> |
12 |
#include <avr/interrupt.h> |
13 |
|
14 |
#include "w5100.h" |
15 |
|
16 |
// W5100 controller instance
|
17 |
W5100Class W5100; |
18 |
|
19 |
#define TX_RX_MAX_BUF_SIZE 2048 |
20 |
#define TX_BUF 0x1100 |
21 |
#define RX_BUF (TX_BUF + TX_RX_MAX_BUF_SIZE)
|
22 |
|
23 |
#define TXBUF_BASE 0x4000 |
24 |
#define RXBUF_BASE 0x6000 |
25 |
|
26 |
void W5100Class::init(void) |
27 |
{ |
28 |
delay(300);
|
29 |
|
30 |
SPI.begin(); |
31 |
initSS(); |
32 |
|
33 |
writeMR(1<<RST);
|
34 |
writeTMSR(0x55);
|
35 |
writeRMSR(0x55);
|
36 |
|
37 |
for (int i=0; i<MAX_SOCK_NUM; i++) { |
38 |
SBASE[i] = TXBUF_BASE + SSIZE * i; |
39 |
RBASE[i] = RXBUF_BASE + RSIZE * i; |
40 |
} |
41 |
} |
42 |
|
43 |
uint16_t W5100Class::getTXFreeSize(SOCKET s) |
44 |
{ |
45 |
uint16_t val=0, val1=0; |
46 |
do {
|
47 |
val1 = readSnTX_FSR(s); |
48 |
if (val1 != 0) |
49 |
val = readSnTX_FSR(s); |
50 |
} |
51 |
while (val != val1);
|
52 |
return val;
|
53 |
} |
54 |
|
55 |
uint16_t W5100Class::getRXReceivedSize(SOCKET s) |
56 |
{ |
57 |
uint16_t val=0,val1=0; |
58 |
do {
|
59 |
val1 = readSnRX_RSR(s); |
60 |
if (val1 != 0) |
61 |
val = readSnRX_RSR(s); |
62 |
} |
63 |
while (val != val1);
|
64 |
return val;
|
65 |
} |
66 |
|
67 |
|
68 |
void W5100Class::send_data_processing(SOCKET s, const uint8_t *data, uint16_t len) |
69 |
{ |
70 |
// This is same as having no offset in a call to send_data_processing_offset
|
71 |
send_data_processing_offset(s, 0, data, len);
|
72 |
} |
73 |
|
74 |
void W5100Class::send_data_processing_offset(SOCKET s, uint16_t data_offset, const uint8_t *data, uint16_t len) |
75 |
{ |
76 |
uint16_t ptr = readSnTX_WR(s); |
77 |
ptr += data_offset; |
78 |
uint16_t offset = ptr & SMASK; |
79 |
uint16_t dstAddr = offset + SBASE[s]; |
80 |
|
81 |
if (offset + len > SSIZE)
|
82 |
{ |
83 |
// Wrap around circular buffer
|
84 |
uint16_t size = SSIZE - offset; |
85 |
write(dstAddr, data, size); |
86 |
write(SBASE[s], data + size, len - size); |
87 |
} |
88 |
else {
|
89 |
write(dstAddr, data, len); |
90 |
} |
91 |
|
92 |
ptr += len; |
93 |
writeSnTX_WR(s, ptr); |
94 |
} |
95 |
|
96 |
|
97 |
void W5100Class::recv_data_processing(SOCKET s, uint8_t *data, uint16_t len, uint8_t peek)
|
98 |
{ |
99 |
uint16_t ptr; |
100 |
ptr = readSnRX_RD(s); |
101 |
read_data(s, (uint8_t *)ptr, data, len); |
102 |
if (!peek)
|
103 |
{ |
104 |
ptr += len; |
105 |
writeSnRX_RD(s, ptr); |
106 |
} |
107 |
} |
108 |
|
109 |
void W5100Class::read_data(SOCKET s, volatile uint8_t *src, volatile uint8_t *dst, uint16_t len) |
110 |
{ |
111 |
uint16_t size; |
112 |
uint16_t src_mask; |
113 |
uint16_t src_ptr; |
114 |
|
115 |
src_mask = (uint16_t)src & RMASK; |
116 |
src_ptr = RBASE[s] + src_mask; |
117 |
|
118 |
if( (src_mask + len) > RSIZE )
|
119 |
{ |
120 |
size = RSIZE - src_mask; |
121 |
read(src_ptr, (uint8_t *)dst, size); |
122 |
dst += size; |
123 |
read(RBASE[s], (uint8_t *) dst, len - size); |
124 |
} |
125 |
else
|
126 |
read(src_ptr, (uint8_t *) dst, len); |
127 |
} |
128 |
|
129 |
|
130 |
uint8_t W5100Class::write(uint16_t _addr, uint8_t _data) |
131 |
{ |
132 |
setSS(); |
133 |
SPI.transfer(0xF0);
|
134 |
SPI.transfer(_addr >> 8);
|
135 |
SPI.transfer(_addr & 0xFF);
|
136 |
SPI.transfer(_data); |
137 |
resetSS(); |
138 |
return 1; |
139 |
} |
140 |
|
141 |
uint16_t W5100Class::write(uint16_t _addr, const uint8_t *_buf, uint16_t _len)
|
142 |
{ |
143 |
for (uint16_t i=0; i<_len; i++) |
144 |
{ |
145 |
setSS(); |
146 |
SPI.transfer(0xF0);
|
147 |
SPI.transfer(_addr >> 8);
|
148 |
SPI.transfer(_addr & 0xFF);
|
149 |
_addr++; |
150 |
SPI.transfer(_buf[i]); |
151 |
resetSS(); |
152 |
} |
153 |
return _len;
|
154 |
} |
155 |
|
156 |
uint8_t W5100Class::read(uint16_t _addr) |
157 |
{ |
158 |
setSS(); |
159 |
SPI.transfer(0x0F);
|
160 |
SPI.transfer(_addr >> 8);
|
161 |
SPI.transfer(_addr & 0xFF);
|
162 |
uint8_t _data = SPI.transfer(0);
|
163 |
resetSS(); |
164 |
return _data;
|
165 |
} |
166 |
|
167 |
uint16_t W5100Class::read(uint16_t _addr, uint8_t *_buf, uint16_t _len) |
168 |
{ |
169 |
for (uint16_t i=0; i<_len; i++) |
170 |
{ |
171 |
setSS(); |
172 |
SPI.transfer(0x0F);
|
173 |
SPI.transfer(_addr >> 8);
|
174 |
SPI.transfer(_addr & 0xFF);
|
175 |
_addr++; |
176 |
_buf[i] = SPI.transfer(0);
|
177 |
resetSS(); |
178 |
} |
179 |
return _len;
|
180 |
} |
181 |
|
182 |
void W5100Class::execCmdSn(SOCKET s, SockCMD _cmd) {
|
183 |
// Send command to socket
|
184 |
writeSnCR(s, _cmd); |
185 |
// Wait for command to complete
|
186 |
while (readSnCR(s))
|
187 |
; |
188 |
} |