root / arduino-1.0 / libraries / Ethernet / utility / w5100.cpp @ 58d82c77
History | View | Annotate | Download (3.78 KB)
1 | 58d82c77 | Tom Mullins | /*
|
---|---|---|---|
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 | } |