W5100.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_W5100
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     
00053     spi->format(8,0);
00054     spi->frequency(2000000);
00055     
00056     cs = 1;
00057     reset_pin = 1;
00058     inst = this;
00059 }
00060 
00061 WIZnet_Chip::WIZnet_Chip(SPI* spi, PinName _cs, PinName _reset):
00062     cs(_cs), reset_pin(_reset)
00063 {
00064     this->spi = spi;
00065     
00066     this->spi->format(8,0);
00067     this->spi->frequency(2000000);
00068 
00069     cs = 1;
00070     reset_pin = 1;
00071     inst = this;
00072 }
00073 
00074 bool WIZnet_Chip::setip()
00075 {
00076     reg_wr<uint32_t>(SIPR, ip);
00077     reg_wr<uint32_t>(GAR, gateway);
00078     reg_wr<uint32_t>(SUBR, netmask);
00079     return true;
00080 }
00081 
00082 bool WIZnet_Chip::setProtocol(int socket, Protocol p)
00083 {
00084     if (socket < 0) {
00085         return false;
00086     }
00087     sreg<uint8_t>(socket, Sn_MR, p);
00088     return true;
00089 }
00090 
00091 bool WIZnet_Chip::connect(int socket, const char * host, int port, int timeout_ms)
00092 {
00093     if (socket < 0) {
00094         return false;
00095     }
00096     sreg<uint8_t>(socket, Sn_MR, TCP);
00097     scmd(socket, OPEN);
00098     sreg_ip(socket, Sn_DIPR, host);
00099     sreg<uint16_t>(socket, Sn_DPORT, port);
00100     sreg<uint16_t>(socket, Sn_PORT, new_port());
00101     scmd(socket, CONNECT);
00102     Timer t;
00103     t.reset();
00104     t.start();
00105     while(!is_connected(socket)) {
00106         if (t.read_ms() > timeout_ms) {
00107             return false;
00108         }
00109     }
00110     return true;
00111 }
00112 
00113 bool WIZnet_Chip::gethostbyname(const char* host, uint32_t* ip)
00114 {
00115     uint32_t addr = str_to_ip(host);
00116     char buf[17];
00117     snprintf(buf, sizeof(buf), "%d.%d.%d.%d", (addr>>24)&0xff, (addr>>16)&0xff, (addr>>8)&0xff, addr&0xff);
00118     if (strcmp(buf, host) == 0) {
00119         *ip = addr;
00120         return true;
00121     }
00122     DNSClient client;
00123     if(client.lookup(host)) {
00124         *ip = client.ip;
00125         return true;
00126     }
00127     return false;
00128 }
00129 
00130 bool WIZnet_Chip::disconnect()
00131 {
00132     return true;
00133 }
00134 
00135 bool WIZnet_Chip::is_connected(int socket)
00136 {
00137     if (sreg<uint8_t>(socket, Sn_SR) == SOCK_ESTABLISHED) {
00138         return true;
00139     }
00140     return false;
00141 }
00142 
00143 
00144 bool WIZnet_Chip::is_fin_received(int socket)
00145 {
00146     uint8_t tmpSn_SR;
00147     tmpSn_SR = sreg<uint8_t>(socket, Sn_SR);
00148     // packet sending is possible, when state is SOCK_CLOSE_WAIT.
00149     if (tmpSn_SR == SOCK_CLOSE_WAIT) {
00150         return true;
00151     }
00152     return false;
00153 }
00154 
00155 void WIZnet_Chip::reset()
00156 {
00157     reset_pin = 1;
00158     reset_pin = 0;
00159     wait_us(2); // 2us
00160     reset_pin = 1;
00161     wait_ms(150); // 150ms
00162     
00163     reg_wr<uint8_t>(MR, 1<<7);
00164     
00165     reg_wr_mac(SHAR, mac);
00166 }
00167 
00168 bool WIZnet_Chip::close(int socket)
00169 {
00170     if (socket < 0) {
00171         return false;
00172     }
00173     // if not connected, return
00174     if (sreg<uint8_t>(socket, Sn_SR) == SOCK_CLOSED) {
00175         return true;
00176     }
00177 
00178     scmd(socket, CLOSE);
00179     sreg<uint8_t>(socket, Sn_IR, 0xff);
00180     return true;
00181 }
00182 
00183 int WIZnet_Chip::wait_readable(int socket, int wait_time_ms, int req_size)
00184 {
00185     if (socket < 0) {
00186         return -1;
00187     }
00188     Timer t;
00189     t.reset();
00190     t.start();
00191     while(1) {
00192         int size = 0; int size1 = 0;
00193         do {
00194             size = sreg<uint16_t>(socket, Sn_RX_RSR);
00195             if (size != 0) size1 = sreg<uint16_t>(socket, Sn_RX_RSR);
00196         }while(size != size1);
00197         
00198         if (size > req_size) {
00199             return size;
00200         }
00201         if (wait_time_ms != (-1) && t.read_ms() > wait_time_ms) {
00202             break;
00203         }
00204     }
00205     return -1;
00206 }
00207 
00208 int WIZnet_Chip::wait_writeable(int socket, int wait_time_ms, int req_size)
00209 {
00210     if (socket < 0) {
00211         return -1;
00212     }
00213     Timer t;
00214     t.reset();
00215     t.start();
00216     while(1) {
00217         //int size = sreg<uint16_t>(socket, Sn_TX_FSR);
00218         // during the reading Sn_TX_FSR, it has the possible change of this register.
00219         // so read twice and get same value then use size information.
00220         int size, size2;
00221         do {
00222             size = sreg<uint16_t>(socket, Sn_TX_FSR);
00223             size2 = sreg<uint16_t>(socket, Sn_TX_FSR);
00224         } while (size != size2);
00225         if (size > req_size) {
00226             return size;
00227         }
00228         if (wait_time_ms != (-1) && t.read_ms() > wait_time_ms) {
00229             break;
00230         }
00231     }
00232     return -1;
00233 }
00234 
00235 int WIZnet_Chip::send(int socket, const char * str, int len)
00236 {
00237     if (socket < 0) {
00238         return -1;
00239     }
00240     uint16_t base = 0x4000 + socket * 0x800; // each socket has 2K buffer
00241     uint16_t ptr = sreg<uint16_t>(socket, Sn_TX_WR);
00242     uint16_t dst = base + (ptr&(0x800-1));    
00243     if ((dst + len) > (base+0x800)) {
00244         int len2 = base + 0x800 - dst;
00245         spi_write(dst, (uint8_t*)str, len2);
00246         spi_write(base, (uint8_t*)str+len2, len-len2);
00247     } else {
00248         spi_write(dst, (uint8_t*)str, len);
00249     }
00250     sreg<uint16_t>(socket, Sn_TX_WR, ptr + len);
00251     scmd(socket, SEND);
00252     return len;
00253 }
00254 
00255 int WIZnet_Chip::recv(int socket, char* buf, int len)
00256 {
00257     if (socket < 0) {
00258         return -1;
00259     }
00260     uint16_t base = 0x6000 + socket * 0x800; // each socket has 2K buffer
00261     uint16_t ptr = sreg<uint16_t>(socket, Sn_RX_RD);
00262     uint16_t src = base + (ptr&(0x800-1));    
00263     if ((src + len) > (base+0x800)) {
00264         int len2 = base + 0x800 - src;
00265         spi_read(src, (uint8_t*)buf, len2);
00266         spi_read(base, (uint8_t*)buf+len2, len-len2);
00267     } else {
00268         spi_read(src, (uint8_t*)buf, len);
00269     }
00270     sreg<uint16_t>(socket, Sn_RX_RD, ptr + len);
00271     scmd(socket, RECV);
00272     return len;
00273 }
00274 
00275 int WIZnet_Chip::new_socket()
00276 {
00277     for(int s = 0; s < MAX_SOCK_NUM; s++) {
00278         if (sreg<uint8_t>(s, Sn_SR) == SOCK_CLOSED) {
00279             return s;
00280         }
00281     }
00282     return -1;
00283 }
00284 
00285 uint16_t WIZnet_Chip::new_port()
00286 {
00287     uint16_t port = rand();
00288     port |= 49152;
00289     return port;
00290 }
00291 
00292 void WIZnet_Chip::scmd(int socket, Command cmd)
00293 {
00294     sreg<uint8_t>(socket, Sn_CR, cmd);
00295     while(sreg<uint8_t>(socket, Sn_CR));
00296 }
00297 
00298 void WIZnet_Chip::spi_write(uint16_t addr, const uint8_t *buf, uint16_t len)
00299 {
00300     for(int i = 0; i < len; i++) {
00301         cs = 0;
00302         spi->write(0xf0);
00303         spi->write(addr >> 8);
00304         spi->write(addr & 0xff);
00305         addr++;
00306         spi->write(buf[i]);
00307         cs = 1;
00308     }
00309 #if DBG_SPI
00310     debug("[SPI]W %04x(%d)", addr, len);
00311     for(int i = 0; i < len; i++) {
00312         debug(" %02x", buf[i]);
00313         if (i > 16) {
00314             debug(" ...");
00315             break;
00316         }
00317     }
00318     debug("\r\n");
00319 #endif    
00320 }
00321 
00322 void WIZnet_Chip::spi_read(uint16_t addr, uint8_t *buf, uint16_t len)
00323 {
00324     for(int i = 0; i < len; i++) {
00325         cs = 0;
00326         spi->write(0x0f);
00327         spi->write(addr >> 8);
00328         spi->write(addr & 0xff);
00329         addr++;
00330         buf[i] = spi->write(0);
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