W5200.cpp

00001 /* Copyright (C) 2012 mbed.org, MIT License
00002  *
00003  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
00004  * and associated documentation files (the "Software"), to deal in the Software without restriction,
00005  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
00006  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
00007  * furnished to do so, subject to the following conditions:
00008  *
00009  * The above copyright notice and this permission notice shall be included in all copies or
00010  * substantial portions of the Software.
00011  *
00012  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
00013  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00014  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00015  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00016  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00017  */
00018 
00019 #include "mbed.h"
00020 #include "mbed_debug.h"
00021 #include "wiznet.h"
00022 #include "DNSClient.h"
00023 
00024 #ifdef USE_W5200
00025 
00026 //Debug is disabled by default
00027 #if 0
00028 #define DBG(...) do{debug("%p %d %s ", this,__LINE__,__PRETTY_FUNCTION__); debug(__VA_ARGS__); } while(0);
00029 //#define DBG(x, ...) debug("[WIZnet_Chip:DBG]"x"\r\n", ##__VA_ARGS__);
00030 #define WARN(x, ...) debug("[WIZnet_Chip:WARN]"x"\r\n", ##__VA_ARGS__);
00031 #define ERR(x, ...) debug("[WIZnet_Chip:ERR]"x"\r\n", ##__VA_ARGS__);
00032 #else
00033 #define DBG(x, ...)
00034 #define WARN(x, ...)
00035 #define ERR(x, ...)
00036 #endif
00037 
00038 #if 1
00039 #define INFO(x, ...) debug("[WIZnet_Chip:INFO]"x"\r\n", ##__VA_ARGS__);
00040 #else
00041 #define INFO(x, ...)
00042 #endif
00043 
00044 #define DBG_SPI 0
00045 
00046 WIZnet_Chip* WIZnet_Chip::inst;
00047 
00048 WIZnet_Chip::WIZnet_Chip(PinName mosi, PinName miso, PinName sclk, PinName _cs, PinName _reset):
00049     cs(_cs), reset_pin(_reset)
00050 {
00051     spi = new SPI(mosi, miso, sclk);
00052     cs = 1;
00053     reset_pin = 1;
00054     inst = this;
00055 }
00056 
00057 WIZnet_Chip::WIZnet_Chip(SPI* spi, PinName _cs, PinName _reset):
00058     cs(_cs), reset_pin(_reset)
00059 {
00060     this->spi = spi;
00061     cs = 1;
00062     reset_pin = 1;
00063     inst = this;
00064 }
00065 
00066 bool WIZnet_Chip::setip()
00067 {
00068     reg_wr<uint32_t>(SIPR, ip);
00069     reg_wr<uint32_t>(GAR, gateway);
00070     reg_wr<uint32_t>(SUBR, netmask);
00071     return true;
00072 }
00073 
00074 bool WIZnet_Chip::setProtocol(int socket, Protocol p)
00075 {
00076     if (socket < 0) {
00077         return false;
00078     }
00079     sreg<uint8_t>(socket, Sn_MR, p);
00080     return true;
00081 }
00082 
00083 bool WIZnet_Chip::connect(int socket, const char * host, int port, int timeout_ms)
00084 {
00085     if (socket < 0) {
00086         return false;
00087     }
00088     sreg<uint8_t>(socket, Sn_MR, TCP);
00089     scmd(socket, OPEN);
00090     sreg_ip(socket, Sn_DIPR, host);
00091     sreg<uint16_t>(socket, Sn_DPORT, port);
00092     sreg<uint16_t>(socket, Sn_PORT, new_port());
00093     scmd(socket, CONNECT);
00094     Timer t;
00095     t.reset();
00096     t.start();
00097     while(!is_connected(socket)) {
00098         if (t.read_ms() > timeout_ms) {
00099             return false;
00100         }
00101     }
00102     return true;
00103 }
00104 
00105 
00106 bool WIZnet_Chip::is_fin_received(int socket)
00107 {
00108     uint8_t tmpSn_SR;
00109     tmpSn_SR = sreg<uint8_t>(socket, Sn_SR);
00110     // packet sending is possible, when state is SOCK_CLOSE_WAIT.
00111     if (tmpSn_SR == SOCK_CLOSE_WAIT) {
00112         return true;
00113     }
00114     return false;
00115 }
00116 
00117 bool WIZnet_Chip::gethostbyname(const char* host, uint32_t* ip)
00118 {
00119     uint32_t addr = str_to_ip(host);
00120     char buf[17];
00121     snprintf(buf, sizeof(buf), "%d.%d.%d.%d", (addr>>24)&0xff, (addr>>16)&0xff, (addr>>8)&0xff, addr&0xff);
00122     if (strcmp(buf, host) == 0) {
00123         *ip = addr;
00124         return true;
00125     }
00126     DNSClient client;
00127     if(client.lookup(host)) {
00128         *ip = client.ip;
00129         return true;
00130     }
00131     return false;
00132 }
00133 
00134 bool WIZnet_Chip::disconnect()
00135 {
00136     return true;
00137 }
00138 
00139 bool WIZnet_Chip::is_connected(int socket)
00140 {
00141     if (sreg<uint8_t>(socket, Sn_SR) == SOCK_ESTABLISHED) {
00142         return true;
00143     }
00144     return false;
00145 }
00146 
00147 void WIZnet_Chip::reset()
00148 {
00149     reset_pin = 1;
00150     reset_pin = 0;
00151     wait_us(2); // 2us
00152     reset_pin = 1;
00153     wait_ms(150); // 150ms
00154     
00155     reg_wr<uint8_t>(MR, 1<<7);
00156 
00157     reg_wr_mac(SHAR, mac);
00158 }
00159 
00160 bool WIZnet_Chip::close(int socket)
00161 {
00162     if (socket < 0) {
00163         return false;
00164     }
00165     // if not connected, return
00166     if (sreg<uint8_t>(socket, Sn_SR) == SOCK_CLOSED) {
00167         return true;
00168     }
00169     if (sreg<uint8_t>(socket, Sn_MR) == TCP) {
00170         scmd(socket, DISCON);
00171     }
00172     scmd(socket, CLOSE);
00173     sreg<uint8_t>(socket, Sn_IR, 0xff);
00174     return true;
00175 }
00176 
00177 int WIZnet_Chip::wait_readable(int socket, int wait_time_ms, int req_size)
00178 {
00179     if (socket < 0) {
00180         return -1;
00181     }
00182     Timer t;
00183     t.reset();
00184     t.start();
00185     while(1) {
00186         //int size = sreg<uint16_t>(socket, Sn_RX_RSR);
00187         // during the reading Sn_RX_RXR, it has the possible change of this register.
00188         // so read twice and get same value then use size information.
00189         int size, size2;
00190         do {
00191             size = sreg<uint16_t>(socket, Sn_RX_RSR);
00192             size2 = sreg<uint16_t>(socket, Sn_RX_RSR);
00193         } while (size != size2);
00194 
00195         if (size > req_size) {
00196             return size;
00197         }
00198         if (wait_time_ms != (-1) && t.read_ms() > wait_time_ms) {
00199             break;
00200         }
00201     }
00202     return -1;
00203 }
00204 
00205 int WIZnet_Chip::wait_writeable(int socket, int wait_time_ms, int req_size)
00206 {
00207     if (socket < 0) {
00208         return -1;
00209     }
00210     Timer t;
00211     t.reset();
00212     t.start();
00213     while(1) {
00214         //int size = sreg<uint16_t>(socket, Sn_TX_FSR);
00215         // during the reading Sn_TX_FSR, it has the possible change of this register.
00216         // so read twice and get same value then use size information.
00217         int size, size2;
00218         do {
00219             size = sreg<uint16_t>(socket, Sn_TX_FSR);
00220             size2 = sreg<uint16_t>(socket, Sn_TX_FSR);
00221         } while (size != size2);
00222         
00223         if (size > req_size) {
00224             return size;
00225         }
00226         if (wait_time_ms != (-1) && t.read_ms() > wait_time_ms) {
00227             break;
00228         }
00229     }
00230     return -1;
00231 }
00232 
00233 int WIZnet_Chip::send(int socket, const char * str, int len)
00234 {
00235     if (socket < 0) {
00236         return -1;
00237     }
00238     uint16_t base = 0x8000 + socket * 0x800;
00239     uint16_t ptr = sreg<uint16_t>(socket, Sn_TX_WR);
00240     uint16_t dst = base + (ptr&(0x800-1));    
00241     if ((dst + len) > (base+0x800)) {
00242         int len2 = base + 0x800 - dst;
00243         spi_write(dst, (uint8_t*)str, len2);
00244         spi_write(base, (uint8_t*)str+len2, len-len2);
00245     } else {
00246         spi_write(dst, (uint8_t*)str, len);
00247     }
00248     sreg<uint16_t>(socket, Sn_TX_WR, ptr + len);
00249     scmd(socket, SEND);
00250     return len;
00251 }
00252 
00253 int WIZnet_Chip::recv(int socket, char* buf, int len)
00254 {
00255     if (socket < 0) {
00256         return -1;
00257     }
00258     uint16_t base = 0xc000 + socket * 0x800;
00259     uint16_t ptr = sreg<uint16_t>(socket, Sn_RX_RD);
00260     uint16_t src = base + (ptr&(0x800-1));    
00261     if ((src + len) > (base+0x800)) {
00262         int len2 = base + 0x800 - src;
00263         spi_read(src, (uint8_t*)buf, len2);
00264         spi_read(base, (uint8_t*)buf+len2, len-len2);
00265     } else {
00266         spi_read(src, (uint8_t*)buf, len);
00267     }
00268     sreg<uint16_t>(socket, Sn_RX_RD, ptr + len);
00269     scmd(socket, RECV);
00270     return len;
00271 }
00272 
00273 int WIZnet_Chip::new_socket()
00274 {
00275     for(int s = 0; s < 8; s++) {
00276         if (sreg<uint8_t>(s, Sn_SR) == SOCK_CLOSED) {
00277             return s;
00278         }
00279     }
00280     return -1;
00281 }
00282 
00283 uint16_t WIZnet_Chip::new_port()
00284 {
00285     uint16_t port = rand();
00286     port |= 49152;
00287     return port;
00288 }
00289 
00290 void WIZnet_Chip::scmd(int socket, Command cmd)
00291 {
00292     sreg<uint8_t>(socket, Sn_CR, cmd);
00293     while(sreg<uint8_t>(socket, Sn_CR));
00294 }
00295 
00296 void WIZnet_Chip::spi_write(uint16_t addr, const uint8_t *buf, uint16_t len)
00297 {
00298     cs = 0;
00299     spi->write(addr >> 8);
00300     spi->write(addr & 0xff);
00301     spi->write((0x80 | ((len & 0x7f00) >> 8)));
00302     spi->write(len & 0xff);
00303     for(int i = 0; i < len; i++) {
00304         spi->write(buf[i]);
00305     }
00306     cs = 1;
00307 
00308 #if DBG_SPI
00309     debug("[SPI]W %04x(%d)", addr, len);
00310     for(int i = 0; i < len; i++) {
00311         debug(" %02x", buf[i]);
00312         if (i > 16) {
00313             debug(" ...");
00314             break;
00315         }
00316     }
00317     debug("\r\n");
00318 #endif    
00319 }
00320 
00321 void WIZnet_Chip::spi_read(uint16_t addr, uint8_t *buf, uint16_t len)
00322 {
00323     cs = 0;
00324     spi->write(addr >> 8);
00325     spi->write(addr & 0xff);
00326     spi->write((0x00 | ((len & 0x7f00) >> 8)));
00327     spi->write(len & 0xff);
00328     for(int i = 0; i < len; i++) {
00329         buf[i] = spi->write(0);
00330     }
00331     cs = 1;
00332 
00333 #if DBG_SPI
00334     debug("[SPI]R %04x(%d)", addr, len);
00335     for(int i = 0; i < len; i++) {
00336         debug(" %02x", buf[i]);
00337         if (i > 16) {
00338             debug(" ...");
00339             break;
00340         }
00341     }
00342     debug("\r\n");
00343     if ((addr&0xf0ff)==0x4026 || (addr&0xf0ff)==0x4003) {
00344         wait_ms(200);
00345     }
00346 #endif    
00347 }
00348 
00349 uint32_t str_to_ip(const char* str)
00350 {
00351     uint32_t ip = 0;
00352     char* p = (char*)str;
00353     for(int i = 0; i < 4; i++) {
00354         ip |= atoi(p);
00355         p = strchr(p, '.');
00356         if (p == NULL) {
00357             break;
00358         }
00359         ip <<= 8;
00360         p++;
00361     }
00362     return ip;
00363 }
00364 
00365 void printfBytes(char* str, uint8_t* buf, int len)
00366 {
00367     printf("%s %d:", str, len);
00368     for(int i = 0; i < len; i++) {
00369         printf(" %02x", buf[i]);
00370     }
00371     printf("\n");  
00372 }
00373 
00374 void printHex(uint8_t* buf, int len)
00375 {
00376     for(int i = 0; i < len; i++) {
00377         if ((i%16) == 0) {
00378             printf("%p", buf+i);
00379         }
00380         printf(" %02x", buf[i]);
00381         if ((i%16) == 15) {
00382             printf("\n");
00383         }
00384     }
00385     printf("\n");
00386 }
00387 
00388 void debug_hex(uint8_t* buf, int len)
00389 {
00390     for(int i = 0; i < len; i++) {
00391         if ((i%16) == 0) {
00392             debug("%p", buf+i);
00393         }
00394         debug(" %02x", buf[i]);
00395         if ((i%16) == 15) {
00396             debug("\n");
00397         }
00398     }
00399     debug("\n");
00400 }
00401 
00402 #endif