Lorcan Smith
SNMP agent attached to SPI slave
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main.cpp
00001 00002 /* 00003 Generated: Enet_SPI_LPC1768.bin 00004 00005 mbed test software for Ethernet HTTPServer with simultaneous SPI for 4 data byte updates 00006 00007 Version Date Author Change 00008 0.2: 06/10/11 LS Add block checksum character to SPI data 00009 0.3: 07/10/11 LS Add SPI read from cmd_buf 00010 0.4: 13/10/11 LS Integrated with HTTP server example code 00011 0.5: 18/10/11 LS Initial file handling 00012 0.6: 26/10/11 LS File IO handled by SPI_server class 00013 0.78: 17/11/11 LS Add SNMP files for system info reporting, but HTTP svr.bind disabled 00014 0.79 12/12/11 LS Reads network addresses from file & uses enterprise address 00015 0.80 18/12/11 LS Save last number read in read_addrs_from_file(). 00016 0.81 22/12/11 LS Add new_cmd_idx to indicate which parameter has been set (0 for none). 00017 0.82 22/12/11 LS Add blinker to show comms activity 00018 0.83 23/12/11 LS Clear cmd_buf[0] after SPI been read 4 times 00019 0.84 27/12/11 LS snmp_fw_version & f3k_fw_version saved as 4 char strings 00020 0.85 29/12/11 LS Update f3k_sys_set_value() & f3k_sys_set_test() to enable net address change 00021 0.90 29/12/11 LS Add 3-step routine for passing commands over SPI bus from cmd_buf 00022 0.94 10/01/12 LS Add led_link = LPC_GPIO1->FIOPIN & (1<<25) in netservice.cpp 00023 0.95 11/01/12 LS Fix f3k_speed reporting error in private_mib.c 00024 0.96 12/01/12 LS Move led_link = LPC_GPIO1->FIOPIN & (1<<25) to eth_poll in eth_drv.cpp 00025 0.98 26/04/12 LS Increase snmp_publiccommunity[7] to [21] and allow this to be set from file 00026 0.99 08/06/12 LS #define SNMP_TRAP_DESTINATIONS 1. Declare th_ad[4] for host trap address 00027 Add init_traps() to ensure head-head link status trap is sent 00028 21/06/12 Add check for changes to IO bytes and chk_SPI_active() every 60 seconds 00029 1.00 22/06/12 LS Save SNMP changes to net addresses & mask4_IO_registers in net_adrs.txt 00030 00031 http://192.168.99.99/rpc/offset,604 writes 604 to reg_offset 00032 http://192.168.99.99/rpc/led2/write,1 writes 1 to led2 00033 http://192.168.99.99/files/IO1000PX.htm uploads file IO1000PX.htm 00034 */ 00035 00036 #include "mbed.h" 00037 #include "EthernetNetIf.h" 00038 #include "HTTPServer.h" 00039 #include "lwip/snmp_structs.h" 00040 #include "lwip/snmp_msg.h" 00041 #include "IO_file.h" 00042 00043 #define LPC1768 0x60 // SPI address of LPC1768 module 00044 #define READ_IO 0x01 // bit in address field for data reads 00045 #define SPI_BYTES 4 // # of data bytes in SPI message 00046 #define INV_SPI_CNT 0xfffff // invalid (over-range SPI count 00047 #define NUM_READ 8 // # of SPI replies for valid reads 00048 #define NUM_INDX 4 // # of SPI replies for valid cmd_buf index 00049 #define MAX_CMD 4 // size of CMD buffer 00050 #define NO_CMD 0xff // data on cmd_buf[0] when NO_CMD to be sent 00051 #define NO_UPDATE 0 // NO change to Ethernet addresses 00052 #define UPDATED 0xff // Ethernet addresses updated in file 00053 #define NET_ADRS_FILE "/webfs/net_adrs.txt" 00054 00055 00056 const char * snmp_fw_version = "1.a"; 00057 00058 /* default ethernet address setup */ 00059 unsigned char ip_ad[4] = {192,168,99,99}; 00060 unsigned char msk_ad[4] = {255,255,255,0}; 00061 unsigned char gwy_ad[4] = {192,168,99,253}; 00062 unsigned char dns_ad[4] = {192,168,99,253}; 00063 unsigned char th_ad[4] = {146,38,105,49}; // v0.99: host address for SNMP traps 00064 unsigned char net_addrs_set = false; // flags net address update from SNMP 00065 unsigned char net_addrs_chng = NO_UPDATE; // flags net address changed in main CPU 00066 unsigned char byte_changed = false; // true if any IO regs have changed 00067 unsigned char all_IO_updated = false; // true if all 32 IO regs have been read 00068 char hex_mask[12]; // IO mask as hex string 00069 unsigned long mask4_IO_registers = 0x3fffffff; // mask for IO regs ignoring IO31 & 32 00070 unsigned long spi_count = 0; // last SPI_COUNT saved in SPI interrupt 00071 unsigned char spi_active = true; // avoid false trap message at start 00072 00073 static u8_t syslocation[32]; /* v0.9b */ 00074 u8_t sysloc_len; 00075 00076 SPISlave spi_slave(p11, p12, p13, p14); // mosi, miso, sclk, ssel 00077 00078 Ticker comms_tick; 00079 Ticker sys_tick; // system tick for SNMP sysuptime report 00080 Ticker spi_tick; // tick for monitoring SPI activity 00081 Timeout cold_start_delay; 00082 00083 DigitalOut led1(LED1, "led1"); // mimics head-head link status o/p in main CPU I/O 00084 DigitalOut led2(LED2, "led2"); 00085 DigitalOut led3(LED3, "led3"); 00086 DigitalOut led4(LED4, "led4"); 00087 DigitalOut led_link(p29); // Green link status: ON=good, Blink=Activity 00088 DigitalOut led_speed(p30); // Yellow link speed: ON for 100Mb/s 00089 00090 unsigned char blink_led = false; 00091 unsigned char trap_init = false; // true after cold_start trap sent 00092 00093 LocalFileSystem fs( "webfs" ); 00094 00095 IpAddr mip, mnm, mgw, mdns; // instantiate from core\ipaddr.cpp 00096 00097 //EthernetNetIf eth; // use if DNS sets up address 00098 00099 HTTPServer svr; 00100 SPI_Server fsvr( "fsvr" ); 00101 00102 Serial pc( USBTX, USBRX ); // for diagnostic serial comms to PC via USB 00103 00104 /****************************************************************************/ 00105 /* SPI interface data and routines */ 00106 /****************************************************************************/ 00107 /* commands sent to main CPU cpu from cmd_buf[0] and 00108 waiting commands stored in higher indices until sent */ 00109 unsigned char cmd_buf[ MAX_CMD ]; // store for commands from Ethernet 00110 unsigned char new_cmd_idx; 00111 00112 00113 /****************************************************************************/ 00114 /* SPI_Server: 00115 * Description: Instantiates Class to hold & access all data read from RAM by SPI 00116 * Called by FSHandler::doGet() in services\http\server\impl 00117 * Parameters: name of object instantiated 00118 * Returns: NONE 00119 */ 00120 /****************************************************************************/ 00121 SPI_Server::SPI_Server(const char * name) 00122 { 00123 int idx; 00124 for ( idx = 0; idx < MAX_RAM; idx++ ) 00125 { 00126 ram_img[ idx ] = (MAX_RAM - idx) & 0xff; 00127 } 00128 reg_offset = 0; 00129 } 00130 00131 SPI_Server::~SPI_Server() 00132 { 00133 if(fp) fclose(fp); 00134 } 00135 00136 /****************************************************************************/ 00137 /* update_IO_file: 00138 * Description: Reads data from ram_img[] into IO1000PX.htm for web access 00139 * Called by FSHandler::doGet() in services\http\server\impl 00140 * Globals used: NONE 00141 * Parameters: NONE 00142 * Returns: 0 if OK, 1 if failed to open files 00143 */ 00144 /****************************************************************************/ 00145 int SPI_Server::update_IO_file() 00146 { 00147 int c, i; // characters read/written in files 00148 unsigned short chnl, dval; // data from 1000PX 00149 00150 DBG("\r\nIn SPI_Server::update_IO_file()\r\n"); 00151 FILE *fr = fopen("/webfs/hdr.htm", "r"); 00152 if(!fr) { 00153 fprintf(stderr, "\r\nFile /webfs/hdr.htm could not be opened!\r\n"); 00154 exit(1); 00155 } 00156 else 00157 { 00158 fp = fopen( "/webfs/IO1000PX.htm", "w" ); 00159 if(!fp) { 00160 fprintf(stderr, "\r\nFile /webfs/IO1000PX.htm could not be opened to write!\r\n" ); 00161 exit(1); 00162 } 00163 else 00164 { 00165 while ( (c = fgetc(fr)) != EOF ) 00166 { 00167 fputc( c, fp ); 00168 } 00169 fclose(fr); 00170 DBG("\r\nIn SPI_Server::update_IO_file() - header copied\r\n"); 00171 for ( i = 0; i < 16; i++ ) 00172 { 00173 chnl = reg_offset + i; 00174 dval = 256 * ram_img[ 2*chnl ] + ram_img[ 2*chnl + 1 ]; 00175 fprintf(fp, " <TR VALIGN=TOP>\r\n"); 00176 fprintf(fp, " <TD WIDTH=124>\r\n"); 00177 fprintf(fp, " <P>%02d</P>\r\n", chnl ); 00178 fprintf(fp, " </TD>\r\n"); 00179 fprintf(fp, " <TD WIDTH=124>\r\n"); 00180 fprintf(fp, " <P>%d</P>\r\n", dval ); 00181 fprintf(fp, " </TD>\r\n"); 00182 fprintf(fp, " <TD WIDTH=124>\r\n"); 00183 fprintf(fp, " <P>%02x</P>\r\n", (dval/256) ); 00184 fprintf(fp, " </TD>\r\n"); 00185 fprintf(fp, " <TD WIDTH=124>\r\n"); 00186 fprintf(fp, " <P>%02x</P>\r\n", (dval & 0xff) ); 00187 fprintf(fp, " </TD>\r\n"); 00188 fprintf(fp, " </TR>\r\n"); 00189 } 00190 fprintf(fp, "</TABLE>\r\n<P><BR><BR>\r\n</P>\r\n</BODY>\r\n</HTML>\r\n"); 00191 } 00192 } 00193 fclose(fp); 00194 // fclose(fr); 00195 return 0; 00196 } 00197 00198 int SPI_Server::read( void ) 00199 { 00200 DBG("\r\nIn SPI_Server::read()\r\n"); 00201 return reg_offset; 00202 } 00203 00204 void SPI_Server::write( int new_offset ) 00205 { 00206 DBG("\r\nIn SPI_Server::write()\r\n"); 00207 if ( (new_offset >= 0) && (new_offset < MAX_RAM) ) reg_offset = new_offset; 00208 } 00209 00210 unsigned char SPI_Server::get_byte( unsigned short idx ) 00211 { 00212 return ram_img[ idx ]; 00213 } 00214 00215 void SPI_Server::put_byte( unsigned short idx, unsigned char new_byte ) 00216 { 00217 if ( idx < MAX_RAM ) 00218 ram_img[ idx ] = new_byte; 00219 } 00220 00221 unsigned short SPI_Server::get_error( void ) 00222 { 00223 // return error register value from main CPU 00224 return (256 * ram_img[ 1786 ]) + ram_img[ 1787 ]; 00225 } 00226 00227 unsigned short SPI_Server::get_SPI_count( void ) 00228 { 00229 // return SPI write count from main CPU - indicates main CPU running OK 00230 return (256 * ram_img[ SPI_COUNT ]) + ram_img[ SPI_COUNT + 1 ]; 00231 } 00232 00233 unsigned char * SPI_Server::net_address_ptr( void ) 00234 { 00235 return &ram_img[ NET_IP_ADDRESS ]; 00236 } 00237 00238 unsigned char * SPI_Server::trap_host_ptr( void ) 00239 { 00240 return &ram_img[ TRAP_HOST_ADDRESS ]; 00241 } 00242 00243 #if 0 00244 //#ifdef MBED_RPC trap_host_ptr 00245 const struct rpc_method *SPI_Server::get_rpc_methods() { 00246 static const rpc_method methods[] = { 00247 { "read", rpc_method_caller<int, SPI_Server, &SPI_Server::read> }, 00248 { "write", rpc_method_caller<SPI_Server, int, &SPI_Server::write> }, 00249 RPC_METHOD_SUPER(Base) //Stream) 00250 }; 00251 return methods; 00252 } 00253 00254 struct rpc_class *SPI_Server::get_rpc_class() { 00255 static const rpc_function funcs[] = { 00256 { "new", rpc_function_caller<const char*, int, &Base::construct<SPI_Server, int> > }, 00257 RPC_METHOD_END 00258 }; 00259 static rpc_class c = { "SPI_Server", funcs, NULL }; 00260 return &c; 00261 } 00262 #endif 00263 00264 void check4write_offset( char * req ) 00265 { 00266 unsigned char l, c, i; 00267 char v[ 20 ] = {0}; 00268 char s[ 20 ] = {0}; 00269 char * p; 00270 00271 strcpy( v, "/offset," ); 00272 p = strstr( req, v ); 00273 strcpy( s, p ); 00274 if ( p != NULL ) 00275 { 00276 i = strlen(v); 00277 l = strlen(s); 00278 if ( (l > i) && (l < (i + 6)) ) 00279 { 00280 l -= i; 00281 for ( c = 0; c < l; c++ ) 00282 { 00283 v[ c ] = s[ i + c ]; 00284 } 00285 v[ c ] = 0; 00286 fsvr.write( atoi(v) ); 00287 } 00288 } 00289 } 00290 00291 /****************************************************************************/ 00292 /* get_SPI_data: 00293 * Description: Implements transaction as SPI slave. 00294 * Reads 4 data bytes from SPI bus into destbuf for SPI write, or 00295 * Puts 1 byte from srcbuf onto SPI for SPI read 00296 * Called by main when spi_slave.receive interrupts 00297 * LPC1768 SPI slave handles a maximum of 8 bytes per transfer 00298 * Globals used: NONE 00299 * Parameters: IN/OUT: unsigned char * srcbuf : buffer to read from 00300 * Returns: int buf_idx : index to SPI data in destbuf/srcbuf 00301 */ 00302 /****************************************************************************/ 00303 int get_SPI_data( unsigned char * srcbuf ) 00304 { 00305 static unsigned char rd_cnt; // v0.83: count of times valid data put on bus 00306 int buf_idx = 0xffff; // index to save SPI data into destbuf 00307 int idx; // index to compare with net address block 00308 unsigned char spi_buf[ 8 ]; // temporary buffer for SPI data received 00309 unsigned char byte_cnt; // count of SPI data bytes received 00310 unsigned char spiv; // SPI value - initial slave address 00311 unsigned char bcc = 0; // received block check character 00312 unsigned char bcc_ok = false; // default to reject messages without bcc 00313 00314 spiv = spi_slave.read(); // Read byte from master 00315 if ( (spiv & 0xfe) == (LPC1768 & 0xfe) ) 00316 { 00317 if ( spiv & READ_IO ) 00318 { 00319 led4 = 1; 00320 led3 = 0; 00321 if ( *srcbuf < NO_CMD ) 00322 { // new data to be read by main CPU cpu 00323 if ( ++rd_cnt >= NUM_READ ) 00324 { // v0.83: clear data after 4 reads 00325 spi_slave.reply( NO_CMD ); // put invalid data in SPI buffer 00326 *srcbuf = NO_CMD; 00327 rd_cnt = 0; 00328 } 00329 else if ( rd_cnt >= NUM_INDX ) 00330 { // next put data from srcbuf in SPI buffer 00331 spi_slave.reply( *srcbuf ); 00332 } 00333 else // put new_cmd_idx on SPI bus first 00334 { 00335 spi_slave.reply( NO_CMD - new_cmd_idx ); // put new_cmd_idx in SPI buffer 00336 } 00337 } // end if ( *srcbuf < 0xff ) 00338 else 00339 { 00340 rd_cnt = 0; // re-initialise read count 00341 spi_slave.reply( NO_CMD ); // put invalid data in SPI buffer 00342 } 00343 } 00344 else // NOT READ_IO - data write 00345 { 00346 buf_idx = spi_slave.read(); // Read ms index from master 00347 bcc ^= buf_idx; // Start checksum calculation 00348 buf_idx *= 256; // Make ms index from master 00349 buf_idx += spi_slave.read(); // Read ls index from master 00350 bcc ^= (buf_idx & 0xff); 00351 byte_cnt = 0; 00352 while( spi_slave.receive() ) { 00353 if( byte_cnt < SPI_BYTES ) { // Read 4 data bytes 00354 spi_buf[ byte_cnt ] = spi_slave.read(); 00355 bcc ^= spi_buf[ byte_cnt++ ]; 00356 } 00357 else if ( byte_cnt == SPI_BYTES ) { 00358 spiv = spi_slave.read(); 00359 bcc_ok = ( bcc == spiv ); 00360 } 00361 } // end while ( spi_slave.receive() ) 00362 if ( bcc_ok && (buf_idx < MAX_RAM) ) 00363 { 00364 for( byte_cnt = 0; byte_cnt < SPI_BYTES; byte_cnt++ ) 00365 { 00366 idx = buf_idx + byte_cnt; 00367 if ( idx <= MAX_IO_REG_BYTE ) 00368 { // check for IO changed from last saved 00369 if ( (spi_buf[ byte_cnt ] != fsvr.get_byte( idx )) && !byte_changed ) 00370 { 00371 if ( mask4_IO_registers & (1 << (idx/2)) ) 00372 { // masked-in register has changed 00373 byte_changed = true; 00374 } 00375 } 00376 if ( idx == MAX_IO_REG_BYTE ) 00377 { // after each I/O scan 00378 all_IO_updated = true; 00379 spi_count = fsvr.get_SPI_count(); // save last SPI_count value 00380 } 00381 } 00382 else if ( idx == NET_ADDRESS_CHANGE ) 00383 { // v0.93: check for net address update from main CPU CPU 00384 if ( spi_buf[ byte_cnt ] == NO_UPDATE ) 00385 { 00386 net_addrs_chng = NO_UPDATE; 00387 } 00388 else if ( net_addrs_chng != UPDATED ) 00389 { 00390 net_addrs_chng = spi_buf[ byte_cnt ]; 00391 } 00392 } 00393 fsvr.put_byte( idx, spi_buf[ byte_cnt ] ); // save byte read from SPI 00394 } 00395 led3 = 0; 00396 } 00397 else // checksum failed 00398 { 00399 led3 = 1; 00400 } 00401 led4 = 0; 00402 } // end else not READ_IO 00403 } // end if ( (spiv & 0xfe) == (LPC1768 & 0xfe) ) 00404 return buf_idx; 00405 } 00406 00407 /****************************************************************************/ 00408 /* chk_SPI_active: 00409 * Description: checks spi_count has been updated in SPI interrupt 00410 * to be called by timer, independently of SPI interrupt 00411 * Globals used: spi_active, spi_count 00412 * Parameters: NONE 00413 * Returns: NONE 00414 */ 00415 /****************************************************************************/ 00416 void chk_SPI_active( void ) 00417 { 00418 if ( spi_count == INV_SPI_CNT ) 00419 { 00420 spi_active = false; // flag SPI failure 00421 } 00422 else 00423 { 00424 spi_count = INV_SPI_CNT; // set to be overwritten by next SPI update 00425 spi_active = true; // SPI updated OK 00426 } 00427 } 00428 00429 /****************************************************************************/ 00430 /* get_hex_mask: 00431 * Description: converts long mask4_IO_registers to hexadecimal string 00432 * Globals used: mask4_IO_registers, hex_mask 00433 * Parameters: NONE 00434 * Returns: pointer to hex_mask 00435 */ 00436 /****************************************************************************/ 00437 char * get_hex_mask( void ) 00438 { 00439 unsigned char i; 00440 for ( i = 0; i < 12; i++ ) 00441 { 00442 hex_mask[ i ] = 0; 00443 } 00444 sprintf(hex_mask, "%08x", mask4_IO_registers); 00445 return hex_mask; 00446 } 00447 00448 /****************************************************************************/ 00449 /* convert2decimal: 00450 * Description: converts hexadecimal string to long mask4_IO_registers 00451 * Globals used: mask4_IO_registers 00452 * Parameters: u8_t * uc_ptr: pointer to hex-formatted mask string 00453 * u16_t len: length of string 00454 * Returns: NONE 00455 */ 00456 /****************************************************************************/ 00457 void convert2decimal( u8_t * uc_ptr, u16_t len ) 00458 { 00459 char ch, i; 00460 unsigned long temp_sum = 0; 00461 00462 for ( i = 0; i < len; i++ ) 00463 { 00464 ch = (char)*(uc_ptr + i); 00465 if ( islower( ch ) ) 00466 { 00467 ch = ch - 'a' + 10; 00468 } 00469 else if ( isupper( ch ) ) 00470 { 00471 ch = ch - 'A' + 10; 00472 } 00473 else if ( isdigit( ch ) ) 00474 { 00475 ch = ch - '0'; 00476 } 00477 else 00478 { 00479 temp_sum = 0xfffffff; 00480 ch = 15; 00481 i = len; // end on error; 00482 } 00483 temp_sum = 16 * temp_sum + ch; 00484 } 00485 mask4_IO_registers = temp_sum; 00486 } 00487 00488 void send_ram( void ) 00489 { 00490 static int idx; 00491 char i; 00492 00493 if ( (idx & 0x7ff) == 0 ) 00494 { 00495 pc.printf("CMD data %x", idx ); 00496 for ( i = 0; i < MAX_CMD; i++ ) 00497 { 00498 pc.printf(", %x", cmd_buf[ i ] ); 00499 } 00500 pc.printf( "\r\n" ); 00501 pc.printf("RAM data %x", idx & 0x7ff ); 00502 for ( i = 0; i < 8; i++ ) 00503 { 00504 pc.printf(", %x", fsvr.get_byte(idx++ & 0x7ff) ); 00505 } 00506 pc.printf( "\r\n" ); 00507 } 00508 else 00509 { 00510 pc.printf("RAM data %x", idx & 0x7ff ); 00511 for ( i = 0; i < 8; i++ ) 00512 { 00513 pc.printf(", %x", fsvr.get_byte(idx++ & 0x7ff) ); 00514 } 00515 pc.printf( "\r\n" ); 00516 } 00517 } 00518 00519 /****************************************************************************/ 00520 /* write_addrs_to_file: 00521 * Description: Writes net addresses to /webfs/net_adrs.txt 00522 * Globals used: NET_ADRS_FILE 00523 * Parameters: NONE 00524 * Returns: 0 if OK, 1 if failed to open files 00525 */ 00526 /****************************************************************************/ 00527 int write_addrs_to_file() 00528 { 00529 FILE *fp = fopen( NET_ADRS_FILE, "w" ); 00530 if(!fp) { 00531 fprintf(stderr, "\r\nFile /webfs/net_adrs.txt could not be opened to write!\r\n"); 00532 exit(1); 00533 } 00534 else // file opened OK, so save addresses 00535 { 00536 fprintf(fp, "IP address %u.%u.%u.%u \r\n", ip_ad[0],ip_ad[1],ip_ad[2],ip_ad[3]); 00537 fprintf(fp, "Address mask %u.%u.%u.%u \r\n", msk_ad[0],msk_ad[1],msk_ad[2],msk_ad[3]); 00538 fprintf(fp, "Gwy address %u.%u.%u.%u \r\n", gwy_ad[0],gwy_ad[1],gwy_ad[2],gwy_ad[3]); 00539 fprintf(fp, "DNS address %u.%u.%u.%u \r\n", dns_ad[0],dns_ad[1],dns_ad[2],dns_ad[3]); 00540 fprintf(fp, "%s\r\n", snmp_publiccommunity ); // v0.98: save community string 00541 fprintf(fp, "Trap host address %u.%u.%u.%u \r\n", th_ad[0],th_ad[1],th_ad[2],th_ad[3]); 00542 fprintf(fp, "%u \r\n", mask4_IO_registers ); 00543 fclose(fp); 00544 } // file opened OK 00545 return 0; 00546 } 00547 00548 /****************************************************************************/ 00549 /* copy_trap_host_address: v0.99 00550 * Description: Copies src array to th_ad 00551 * Globals used: th_ad 00552 * net_addrs_chng set to UPDATED 00553 * Parameters: IN: unsigned char * src - source array of 4 bytes 00554 * Returns: NONE 00555 */ 00556 /****************************************************************************/ 00557 void copy_trap_host_address( unsigned char * src ) 00558 { 00559 unsigned char i; 00560 for ( i = 0; i < 4; i++ ) 00561 { 00562 if ( src[ i ] != 0 ) 00563 { 00564 { 00565 th_ad[ i ] = src[ i ]; 00566 } 00567 } 00568 } 00569 net_addrs_chng = UPDATED; 00570 } 00571 00572 /****************************************************************************/ 00573 /* copy_net_addresses_from: v0.93 00574 * Description: Copies src array to ip_ad, msk_ad, gwy_ad, dns_ad 00575 * Globals used: ip_ad, msk_ad, gwy_ad, dns_ad 00576 * Parameters: IN: unsigned char * src - source array of 16 bytes 00577 * Returns: NONE 00578 */ 00579 /****************************************************************************/ 00580 void copy_net_addresses_from( unsigned char * src ) 00581 { 00582 unsigned char i; 00583 for ( i = 0; i < 4; i++ ) 00584 { 00585 if ( src[ i ] != 0 ) 00586 { 00587 ip_ad[ i ] = src[ i ]; 00588 } 00589 } 00590 for ( i = 4; i < 8; i++ ) 00591 { 00592 if ( src[ i ] != 0 ) 00593 { 00594 msk_ad[ i-4 ] = src[ i ]; 00595 } 00596 } 00597 for ( i = 8; i < 12; i++ ) 00598 { 00599 if ( src[ i ] != 0 ) 00600 { 00601 gwy_ad[ i-8 ] = src[ i ]; 00602 } 00603 } 00604 for ( i = 12; i < 16; i++ ) 00605 { 00606 if ( src[ i ] != 0 ) 00607 { 00608 dns_ad[ i-12 ] = src[ i ]; 00609 } 00610 } 00611 } 00612 00613 /****************************************************************************/ 00614 /* parse4numbers: 00615 * Description: Reads file fr and separates out max_num numbers delimited by 00616 * any non-digit characters 00617 * Globals used: 00618 * Parameters: IN: FILE *fr - file to read 00619 * OUT: unsigned char * numb - array of numbers read 00620 * IN: unsigned char max_num - number of numbers to read 00621 * Returns: NONE 00622 */ 00623 /****************************************************************************/ 00624 void parse4numbers( FILE *fr, unsigned char * numb, unsigned char max_num ) 00625 { 00626 int c, i, new_num; 00627 char digit_found = false; 00628 char number_completed = false; 00629 00630 i = new_num = 0; 00631 while ( ((c = fgetc(fr)) != EOF) && (i < max_num) ) 00632 { 00633 numb[ i ] = 0; 00634 if ( c < '0' || c > '9' ) 00635 { // not a numeric character 00636 if ( digit_found ) 00637 { 00638 number_completed = true; 00639 if ( i >= (max_num - 1) ) 00640 { // max_num distinct numbers read 00641 break; 00642 } 00643 } 00644 } 00645 else // numeric character 00646 { 00647 digit_found = true; 00648 if ( number_completed ) 00649 { // save number into array 00650 numb[ i++ ] = new_num & 0xff; 00651 new_num = 0; 00652 } 00653 new_num = 10*new_num + c - '0'; 00654 number_completed = false; 00655 } // else numeric character 00656 } // end while 00657 if ( (number_completed || (c == EOF)) && (i < max_num) ) 00658 { // 0.80: save last number read 00659 numb[ i++ ] = new_num & 0xff; 00660 } 00661 } 00662 00663 /****************************************************************************/ 00664 /* read_addrs_from_file: 00665 * Description: Reads data from /webfs/net_adrs.txt 00666 * Globals used: NET_ADRS_FILE 00667 * Parameters: NONE 00668 * Returns: 0 if OK, 1 if failed to open files 00669 */ 00670 /****************************************************************************/ 00671 int read_addrs_from_file() 00672 { 00673 int c, i; 00674 unsigned char numbers[17]; 00675 char community[ MAX_COMMUNITY ]; 00676 00677 for ( i = 0; i < MAX_COMMUNITY; i++ ) 00678 { 00679 community[ i ] = 0; 00680 } 00681 FILE *fr = fopen( NET_ADRS_FILE, "r" ); 00682 if(!fr) { 00683 fprintf(stderr, "\r\nFile /webfs/net_adrs.txt could not be opened!\r\n"); 00684 exit(1); 00685 } 00686 else // file opened OK 00687 { 00688 parse4numbers( fr, numbers, 16 ); 00689 copy_net_addresses_from( numbers ); // v0.93: new subroutine 00690 /* v0.98: now read the community string from the file after reading end of line */ 00691 while ( ((c = fgetc(fr)) != EOF) && ((c == ' ') || (c == '\r') || (c == '\n')) ); 00692 i = 0; 00693 do 00694 { 00695 c = (char)c; 00696 if ( (c != ' ') && (c != '\r') && (c != '\n') && (i < MAX_COMMUNITY-1) ) 00697 { 00698 community[ i++ ] = c; 00699 } 00700 else // string terminated 00701 { 00702 break; 00703 } 00704 } while ( ((c = fgetc(fr)) != EOF) && (c != 0) ); 00705 parse4numbers( fr, numbers, 4 ); // now read in Trap host address 00706 copy_trap_host_address( numbers ); 00707 fscanf( fr, "%lu", &mask4_IO_registers ); 00708 fclose(fr); 00709 } // file opened OK 00710 if ( strlen(community) > 3 ) 00711 { // string length 4 to 20 characters 00712 strcpy( snmp_publiccommunity, community ); 00713 pc.printf("community: %s %d \r\n", snmp_publiccommunity, strlen(snmp_publiccommunity) ); 00714 } 00715 else 00716 { 00717 pc.printf("community too short: %s %d \r\n", community, strlen(community) ); 00718 } 00719 return 0; 00720 } 00721 00722 /****************************************************************************/ 00723 /* blinker: 00724 * Description: Blinks led_link for 10 calls 00725 * Globals used: led_link, blink_led, 00726 * Parameters: NONE 00727 * Returns: NONE 00728 */ 00729 /****************************************************************************/ 00730 void blinker( void ) 00731 { 00732 static unsigned char blink_cnt; 00733 00734 if ( blink_led && blink_cnt++ < 10 ) 00735 { 00736 led_link = !led_link; 00737 } 00738 else 00739 { 00740 blink_cnt = 0; 00741 blink_led = false; 00742 } 00743 } 00744 00745 /****************************************************************************/ 00746 /* init_traps: 00747 * Description: initialises trap flags and sends cold start trap when done 00748 * Globals used: trap_init set true after cold start 00749 * Parameters: NONE 00750 * Returns: NONE 00751 */ 00752 /****************************************************************************/ 00753 void init_traps( void ) 00754 { 00755 snmp_coldstart_trap(); 00756 trap_init = true; 00757 } 00758 00759 /****************************************************************************/ 00760 /* check_all_traps: 00761 * Description: test states for all trap events and sends appropriate trap 00762 * Globals used: led2: set to ON if SPI not active 00763 * byte_changed, all_IO_updated, spi_active 00764 * Parameters: NONE 00765 * Returns: NONE 00766 */ 00767 /****************************************************************************/ 00768 void check_all_traps( void ) 00769 { 00770 if ( !led1 && (fsvr.get_byte( H_H_LINK_LSBYTE ) || fsvr.get_byte( H_H_LINK_MSBYTE )) ) 00771 { // change of link state 00772 led1 = 1; // flag: link is up when led1 on 00773 snmp_linkup_trap(); 00774 } 00775 else if ( (fsvr.get_byte( H_H_LINK_LSBYTE ) == 0) && (fsvr.get_byte( H_H_LINK_MSBYTE ) == 0) && led1 ) 00776 { // change of link state 00777 led1 = 0; 00778 snmp_linkdown_trap(); 00779 } 00780 if ( byte_changed && all_IO_updated ) 00781 { // any masked-in I/O register changed 00782 f3kIOchange_trap(); 00783 all_IO_updated = byte_changed = false; 00784 } 00785 if ( spi_active && led2 ) 00786 { 00787 led2 = 0; // flag: SPI is up when led2 off 00788 snmp_SPIup_trap(); 00789 } 00790 else if ( !spi_active && !led2 ) 00791 { 00792 led2 = 1; // flag: SPI is down when led2 on 00793 snmp_SPIdown_trap(); 00794 } 00795 } 00796 00797 00798 /****************************************************************************/ 00799 /****************************************************************************/ 00800 int main() { 00801 int idx; 00802 00803 new_cmd_idx = 0xaa; 00804 for ( idx = 0; idx < MAX_CMD; idx++ ) 00805 { // put meaningful non-valid data in cmd_buf 00806 cmd_buf[ idx ] = new_cmd_idx; 00807 } 00808 pc.printf("=================== Version %s ====================\r\n", snmp_fw_version); 00809 // pc.printf("Press any key to start...\r\n"); 00810 led3 = 1; 00811 00812 FSHandler::mount("/webfs", "/files"); //Mount /webfs path on /files web path 00813 FSHandler::mount("/webfs", "/"); //Mount /webfs path on web root path 00814 read_addrs_from_file(); 00815 00816 /* Force fixed Ethernet address */ 00817 EthernetNetIf eth( 00818 IpAddr( ip_ad[0], ip_ad[1], ip_ad[2], ip_ad[3] ), //IP Address 00819 IpAddr( msk_ad[0], msk_ad[1], msk_ad[2], msk_ad[3] ), //Network Mask 00820 IpAddr( gwy_ad[0], gwy_ad[1], gwy_ad[2], gwy_ad[3] ), //Gateway 00821 IpAddr( dns_ad[0], dns_ad[1], dns_ad[2], dns_ad[3] ) //DNS Server 00822 ); 00823 00824 Base::add_rpc_class<DigitalOut>(); 00825 #if 0 00826 Base::add_rpc_class<SPI_Server>(); 00827 #endif 00828 00829 // pc.getc(); // wait for keyboard 00830 led3 = 0; 00831 00832 strcpy( (char *)syslocation, (const char *)syslocation_default ); 00833 sysloc_len = strlen( (const char *)syslocation ); 00834 snmp_set_syslocation( syslocation, &sysloc_len ); 00835 00836 pc.printf("\r\nSetting up...\r\n"); 00837 EthernetErr ethErr = eth.setup(); 00838 if( ethErr ) 00839 { 00840 pc.printf("Error %d in Ethernet setup.\r\n", ethErr); 00841 // return -1; 00842 } 00843 else // Ethernet Setup OK 00844 { 00845 mip = eth.getIp(); 00846 led3 = 1; 00847 led_speed = LPC_GPIO1->FIOPIN & (1<<26); // GPIO1.26 = "LED_SPEED". 00848 led_link = LPC_GPIO1->FIOPIN & (1<<25); // GPIO1.25 = "LED_LINK". 00849 pc.printf("\r\nEthernet Setup OK\r\n"); 00850 00851 svr.addHandler<RPCHandler>("/rpc"); 00852 svr.addHandler<FSHandler>("/files"); 00853 svr.addHandler<FSHandler>("/"); //Default handler 00854 //Example : Access to mbed.htm : http://a.b.c.d/mbed.htm or http://a.b.c.d/files/mbed.htm 00855 00856 // svr.bind(80); disable for SNMP development 00857 00858 // snmp_init(); done in lwip/core/init.c 00859 00860 pc.printf("Listening...\n\r"); 00861 00862 snmp_trap_dst_ip_set( ONLY_TRAP, (ip_addr_t *)&th_ad[0] ); 00863 snmp_trap_dst_enable( ONLY_TRAP, ENABLED ); 00864 snmp_coldstart_trap(); // to force ARP call 00865 00866 led3 = led4 = 0; 00867 spi_slave.format(8,3); // Setup: byte data, high steady state clock, 2nd edge capture 00868 00869 sys_tick.attach( &snmp_inc_sysuptime, 0.01 ); 00870 spi_tick.attach( &chk_SPI_active, 60.0 ); 00871 comms_tick.attach( &blinker, 0.07 ); // tick to blink activity LED 00872 cold_start_delay.attach( &init_traps, 30.0 ); // send cold_start trap after 30 seconds 00873 00874 00875 // Listen indefinitely to Ethernet and SPI 00876 while ( true ) 00877 { 00878 Net::poll(); // check for Ethernet requests 00879 00880 if ( trap_init ) 00881 { 00882 check_all_traps(); 00883 } 00884 00885 if( spi_slave.receive() ) { 00886 // Data available - needs chip select line to activate 00887 get_SPI_data( cmd_buf ); 00888 } // end if( spi_slave.receive() ) 00889 if ( net_addrs_set ) 00890 { // v0.99: address changed from SNMP i/f 00891 write_addrs_to_file(); 00892 net_addrs_set = false; 00893 } 00894 } // end while ( true ) 00895 00896 } // else Ethernet Setup OK 00897 return 0; 00898 }
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