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 void WIZnet_Chip::reset()
00144 {
00145     reset_pin = 1;
00146     reset_pin = 0;
00147     wait_us(2); // 2us
00148     reset_pin = 1;
00149     wait_ms(150); // 150ms
00150     
00151     reg_wr<uint8_t>(MR, 1<<7);
00152     
00153     reg_wr_mac(SHAR, mac);
00154 }
00155 
00156 bool WIZnet_Chip::close(int socket)
00157 {
00158     if (socket < 0) {
00159         return false;
00160     }
00161     // if not connected, return
00162     if (sreg<uint8_t>(socket, Sn_SR) == SOCK_CLOSED) {
00163         return true;
00164     }
00165 
00166     scmd(socket, CLOSE);
00167     sreg<uint8_t>(socket, Sn_IR, 0xff);
00168     return true;
00169 }
00170 
00171 int WIZnet_Chip::wait_readable(int socket, int wait_time_ms, int req_size)
00172 {
00173     if (socket < 0) {
00174         return -1;
00175     }
00176     Timer t;
00177     t.reset();
00178     t.start();
00179     while(1) {
00180         int size = 0; int size1 = 0;
00181         do {
00182             size = sreg<uint16_t>(socket, Sn_RX_RSR);
00183             if (size != 0) size1 = sreg<uint16_t>(socket, Sn_RX_RSR);
00184         }while(size != size1);
00185         
00186         if (size > req_size) {
00187             return size;
00188         }
00189         if (wait_time_ms != (-1) && t.read_ms() > wait_time_ms) {
00190             break;
00191         }
00192     }
00193     return -1;
00194 }
00195 
00196 int WIZnet_Chip::wait_writeable(int socket, int wait_time_ms, int req_size)
00197 {
00198     if (socket < 0) {
00199         return -1;
00200     }
00201     Timer t;
00202     t.reset();
00203     t.start();
00204     while(1) {
00205         int size = sreg<uint16_t>(socket, Sn_TX_FSR);
00206         if (size > req_size) {
00207             return size;
00208         }
00209         if (wait_time_ms != (-1) && t.read_ms() > wait_time_ms) {
00210             break;
00211         }
00212     }
00213     return -1;
00214 }
00215 
00216 int WIZnet_Chip::send(int socket, const char * str, int len)
00217 {
00218     if (socket < 0) {
00219         return -1;
00220     }
00221     uint16_t base = 0x4000 + socket * 0x800; // each socket has 2K buffer
00222     uint16_t ptr = sreg<uint16_t>(socket, Sn_TX_WR);
00223     uint16_t dst = base + (ptr&(0x800-1));    
00224     if ((dst + len) > (base+0x800)) {
00225         int len2 = base + 0x800 - dst;
00226         spi_write(dst, (uint8_t*)str, len2);
00227         spi_write(base, (uint8_t*)str+len2, len-len2);
00228     } else {
00229         spi_write(dst, (uint8_t*)str, len);
00230     }
00231     sreg<uint16_t>(socket, Sn_TX_WR, ptr + len);
00232     scmd(socket, SEND);
00233     return len;
00234 }
00235 
00236 int WIZnet_Chip::recv(int socket, char* buf, int len)
00237 {
00238     if (socket < 0) {
00239         return -1;
00240     }
00241     uint16_t base = 0x6000 + socket * 0x800; // each socket has 2K buffer
00242     uint16_t ptr = sreg<uint16_t>(socket, Sn_RX_RD);
00243     uint16_t src = base + (ptr&(0x800-1));    
00244     if ((src + len) > (base+0x800)) {
00245         int len2 = base + 0x800 - src;
00246         spi_read(src, (uint8_t*)buf, len2);
00247         spi_read(base, (uint8_t*)buf+len2, len-len2);
00248     } else {
00249         spi_read(src, (uint8_t*)buf, len);
00250     }
00251     sreg<uint16_t>(socket, Sn_RX_RD, ptr + len);
00252     scmd(socket, RECV);
00253     return len;
00254 }
00255 
00256 int WIZnet_Chip::new_socket()
00257 {
00258     for(int s = 0; s < MAX_SOCK_NUM; s++) {
00259         if (sreg<uint8_t>(s, Sn_SR) == SOCK_CLOSED) {
00260             return s;
00261         }
00262     }
00263     return -1;
00264 }
00265 
00266 uint16_t WIZnet_Chip::new_port()
00267 {
00268     uint16_t port = rand();
00269     port |= 49152;
00270     return port;
00271 }
00272 
00273 void WIZnet_Chip::scmd(int socket, Command cmd)
00274 {
00275     sreg<uint8_t>(socket, Sn_CR, cmd);
00276     while(sreg<uint8_t>(socket, Sn_CR));
00277 }
00278 
00279 void WIZnet_Chip::spi_write(uint16_t addr, const uint8_t *buf, uint16_t len)
00280 {
00281     for(int i = 0; i < len; i++) {
00282         cs = 0;
00283         spi->write(0xf0);
00284         spi->write(addr >> 8);
00285         spi->write(addr & 0xff);
00286         addr++;
00287         spi->write(buf[i]);
00288         cs = 1;
00289     }
00290 #if DBG_SPI
00291     debug("[SPI]W %04x(%d)", addr, len);
00292     for(int i = 0; i < len; i++) {
00293         debug(" %02x", buf[i]);
00294         if (i > 16) {
00295             debug(" ...");
00296             break;
00297         }
00298     }
00299     debug("\r\n");
00300 #endif    
00301 }
00302 
00303 void WIZnet_Chip::spi_read(uint16_t addr, uint8_t *buf, uint16_t len)
00304 {
00305     for(int i = 0; i < len; i++) {
00306         cs = 0;
00307         spi->write(0x0f);
00308         spi->write(addr >> 8);
00309         spi->write(addr & 0xff);
00310         addr++;
00311         buf[i] = spi->write(0);
00312         cs = 1;
00313     }
00314 #if DBG_SPI
00315     debug("[SPI]R %04x(%d)", addr, len);
00316     for(int i = 0; i < len; i++) {
00317         debug(" %02x", buf[i]);
00318         if (i > 16) {
00319             debug(" ...");
00320             break;
00321         }
00322     }
00323     debug("\r\n");
00324     if ((addr&0xf0ff)==0x4026 || (addr&0xf0ff)==0x4003) {
00325         wait_ms(200);
00326     }
00327 #endif    
00328 }
00329 
00330 uint32_t str_to_ip(const char* str)
00331 {
00332     uint32_t ip = 0;
00333     char* p = (char*)str;
00334     for(int i = 0; i < 4; i++) {
00335         ip |= atoi(p);
00336         p = strchr(p, '.');
00337         if (p == NULL) {
00338             break;
00339         }
00340         ip <<= 8;
00341         p++;
00342     }
00343     return ip;
00344 }
00345 
00346 void printfBytes(char* str, uint8_t* buf, int len)
00347 {
00348     printf("%s %d:", str, len);
00349     for(int i = 0; i < len; i++) {
00350         printf(" %02x", buf[i]);
00351     }
00352     printf("\n");  
00353 }
00354 
00355 void printHex(uint8_t* buf, int len)
00356 {
00357     for(int i = 0; i < len; i++) {
00358         if ((i%16) == 0) {
00359             printf("%p", buf+i);
00360         }
00361         printf(" %02x", buf[i]);
00362         if ((i%16) == 15) {
00363             printf("\n");
00364         }
00365     }
00366     printf("\n");
00367 }
00368 
00369 void debug_hex(uint8_t* buf, int len)
00370 {
00371     for(int i = 0; i < len; i++) {
00372         if ((i%16) == 0) {
00373             debug("%p", buf+i);
00374         }
00375         debug(" %02x", buf[i]);
00376         if ((i%16) == 15) {
00377             debug("\n");
00378         }
00379     }
00380     debug("\n");
00381 }
00382 
00383 #endif