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For additional information see http://www.ethernut.de/
$Log$ Revision 1.5 2008/01/31 09:38:15 haraldkipp Added return statement in main to avoid warnings with latest GCC.
Revision 1.4 2005/11/22 09:14:13 haraldkipp Replaced specific device names by generalized macros.
Revision 1.3 2004/09/10 10:26:35 haraldkipp Removed old header files
Revision 1.2 2003/11/04 17:46:52 haraldkipp Adapted to Ethernut 2
Revision 1.1 2003/08/05 18:59:05 haraldkipp Release 3.3 update
Revision 1.7 2003/02/04 18:19:39 harald Version 3 released
Revision 1.6 2003/02/04 16:24:34 harald Adapted to version 3
Revision 1.5 2002/10/31 16:25:48 harald Mods by troth for Linux
Revision 1.3 2002/06/26 17:29:03 harald First pre-release with 2.4 stack
Revision 1.2 2002/06/12 11:22:55 harald *** empty log message ***
Revision 1.1 2002/06/04 19:00:49 harald First check in
Simple RS232 server. Use a serial cable to connect the RS232 port of the Ethernut Board with a COM port of a PC. Start a terminal program and a telnet client on the PC. Telnet should connect to the Ethernut Board.
Characters typed in the telnet window will appear in the terminal program window and vice versa. Baudrate is 9600.
00001 00083 #include <dev/board.h> 00084 00085 #include <sys/heap.h> 00086 #include <sys/thread.h> 00087 #include <sys/timer.h> 00088 #include <sys/socket.h> 00089 00090 #include <stdlib.h> 00091 #include <stdio.h> 00092 #include <string.h> 00093 #include <io.h> 00094 #include <fcntl.h> 00095 00096 #include <arpa/inet.h> 00097 00098 #include <pro/dhcp.h> 00099 00100 #define BUFFERSIZE 128 00101 #define TCPPORT 23 00102 00103 typedef struct { 00104 FILE *cd_rs232; 00105 FILE *cd_tcpip; 00106 char cd_connected; 00107 } CHANNEL; 00108 00109 /* 00110 * Transfer data from input stream to output stream. 00111 */ 00112 void StreamCopy(FILE * istream, FILE * ostream, char *cop) 00113 { 00114 int cnt; 00115 char *buff; 00116 00117 buff = malloc(BUFFERSIZE); 00118 while (*cop) { 00119 if ((cnt = fread(buff, 1, BUFFERSIZE, istream)) <= 0) 00120 break; 00121 if (*cop && (cnt = fwrite(buff, 1, cnt, ostream)) <= 0) 00122 break; 00123 if (*cop && fflush(ostream)) 00124 break; 00125 } 00126 *cop = 0; 00127 free(buff); 00128 } 00129 00130 /* 00131 * From RS232 to socket. 00132 */ 00133 THREAD(Receiver, arg) 00134 { 00135 CHANNEL *cdp = arg; 00136 00137 for (;;) { 00138 if (cdp->cd_connected) { 00139 NutThreadSetPriority(64); 00140 /* 00141 * We are reading from the UART without any timeout. So we 00142 * won't return immediately when disconnected. 00143 */ 00144 StreamCopy(cdp->cd_rs232, cdp->cd_tcpip, &cdp->cd_connected); 00145 NutThreadSetPriority(128); 00146 } 00147 NutThreadYield(); 00148 } 00149 } 00150 00151 /* 00152 * Main application routine. 00153 * 00154 * Nut/OS automatically calls this entry after initialization. 00155 */ 00156 int main(void) 00157 { 00158 TCPSOCKET *sock; 00159 CHANNEL cd; 00160 u_long baud = 9600; 00161 00162 /* 00163 * Register our devices. 00164 */ 00165 NutRegisterDevice(&DEV_UART, 0, 0); 00166 NutRegisterDevice(&DEV_ETHER, 0x8300, 5); 00167 00168 /* 00169 * Setup the uart device. 00170 */ 00171 cd.cd_rs232 = fopen(DEV_UART_NAME, "r+b"); 00172 _ioctl(_fileno(cd.cd_rs232), UART_SETSPEED, &baud); 00173 00174 /* 00175 * Setup the ethernet device. Try DHCP first. If this is 00176 * the first time boot with empty EEPROM and no DHCP server 00177 * was found, use hardcoded values. 00178 */ 00179 if (NutDhcpIfConfig(DEV_ETHER_NAME, 0, 60000)) { 00180 /* No valid EEPROM contents, use hard coded MAC. */ 00181 u_char my_mac[] = { 0x00, 0x06, 0x98, 0x20, 0x00, 0x00 }; 00182 00183 if (NutDhcpIfConfig("eth0", my_mac, 60000)) { 00184 /* No DHCP server found, use hard coded IP address. */ 00185 u_long ip_addr = inet_addr("192.168.192.100"); 00186 u_long ip_mask = inet_addr("255.255.255.0"); 00187 00188 NutNetIfConfig("eth0", my_mac, ip_addr, ip_mask); 00189 /* If not in a local network, we must also call 00190 NutIpRouteAdd() to configure the routing. */ 00191 } 00192 } 00193 00194 /* 00195 * Start a RS232 receiver thread. 00196 */ 00197 NutThreadCreate("xmit", Receiver, &cd, 512); 00198 00199 /* 00200 * Now loop endless for connections. 00201 */ 00202 cd.cd_connected = 0; 00203 for (;;) { 00204 /* 00205 * Create a socket and listen for a client. 00206 */ 00207 sock = NutTcpCreateSocket(); 00208 NutTcpAccept(sock, TCPPORT); 00209 00210 /* 00211 * Open a stdio stream assigned to the connected socket. 00212 */ 00213 cd.cd_tcpip = _fdopen((int) sock, "r+b"); 00214 cd.cd_connected = 1; 00215 00216 /* 00217 * Call RS232 transmit routine. On return we will be 00218 * disconnected again. 00219 */ 00220 StreamCopy(cd.cd_tcpip, cd.cd_rs232, &cd.cd_connected); 00221 00222 /* 00223 * Close the stream. 00224 */ 00225 fclose(cd.cd_tcpip); 00226 00227 /* 00228 * Close our socket. 00229 */ 00230 NutTcpCloseSocket(sock); 00231 } 00232 return 0; 00233 }