fp@1122: /*****************************************************************************
fp@1122:  *
fp@1122:  * $Id$
fp@1122:  *
fp@1122:  ****************************************************************************/
fp@1122: 
fp@1122: #include <iostream>
fp@1122: #include <iomanip>
fp@1122: #include <sstream>
fp@1122: using namespace std;
fp@1122: 
fp@1122: #include "globals.h"
fp@1126: #include "sii_crc.h"
fp@1122: 
fp@1122: /*****************************************************************************/
fp@1122: 
fp@1122: const char *help_alias =
fp@1122:     "[OPTIONS] <ALIAS>\n"
fp@1122:     "\n"
fp@1122:     "Write the secondary slave address (alias) for either\n"
fp@1122:     "one or for multiple slaves.\n"
fp@1122:     "\n"
fp@1122:     "Arguments:\n"
fp@1137:     "  ALIAS must be an unsigned 16 bit number. Zero means no alias.\n"
fp@1122:     "\n"
fp@1122:     "Command-specific options:\n"
fp@1137:     "  --slave -s <index>  Positive numerical ring position, or 'all' for\n"
fp@1137:     "                      all slaves (default). The --force option is\n"
fp@1137:     "                      required in this case.\n"
fp@1137:     "  --force             Acknowledge writing aliases of all slaves.\n"
fp@1137:     "\n"
fp@1137:     "Numerical values can be specified either with decimal (no prefix),\n"
fp@1137:     "octal (prefix '0') or hexadecimal (prefix '0x') base.\n";
fp@1122: 
fp@1122: /*****************************************************************************/
fp@1122: 
fp@1122: void writeSlaveAlias(uint16_t, uint16_t);
fp@1122: 
fp@1122: /*****************************************************************************/
fp@1122: 
fp@1122: /** Writes the Secondary slave address (alias) to the slave's SII.
fp@1122:  */
fp@1122: void command_alias(void)
fp@1122: {
fp@1122:     uint16_t alias;
fp@1122:     stringstream err, strAlias;
fp@1122:     int number;
fp@1122:     unsigned int numSlaves, i;
fp@1122: 
fp@1122:     if (commandArgs.size() != 1) {
fp@1125:         err << "'" << commandName << "' takes exactly one argument!";
fp@1122:         throw InvalidUsageException(err);
fp@1122:     }
fp@1122: 
fp@1122:     strAlias << commandArgs[0];
fp@1122:     strAlias
fp@1122:         >> resetiosflags(ios::basefield) // guess base from prefix
fp@1122:         >> number;
fp@1122:     if (strAlias.fail() || number < 0x0000 || number > 0xffff) {
fp@1122:         err << "Invalid alias '" << commandArgs[0] << "'!";
fp@1122:         throw InvalidUsageException(err);
fp@1122:     }
fp@1122:     alias = number;
fp@1122: 
fp@1122:     if (slavePosition == -1) {
fp@1122:         if (!force) {
fp@1122:             err << "This will write the alias addresses of all slaves to "
fp@1122:                 << alias << "! Please specify --force to proceed.";
fp@1136:             throw CommandException(err);
fp@1122:         }
fp@1122: 
fp@1122:         masterDev.open(MasterDevice::ReadWrite);
fp@1122:         numSlaves = masterDev.slaveCount();
fp@1122: 
fp@1122:         for (i = 0; i < numSlaves; i++) {
fp@1122:             writeSlaveAlias(i, alias);
fp@1122:         }
fp@1122:     } else {
fp@1122:         masterDev.open(MasterDevice::ReadWrite);
fp@1122:         writeSlaveAlias(slavePosition, alias);
fp@1122:     }
fp@1122: }
fp@1122: 
fp@1122: /*****************************************************************************/
fp@1122: 
fp@1122: /** Writes the Secondary slave address (alias) to the slave's SII.
fp@1122:  */
fp@1122: void writeSlaveAlias(
fp@1122:         uint16_t slavePosition,
fp@1122:         uint16_t alias
fp@1122:         )
fp@1122: {
fp@1122:     ec_ioctl_slave_sii_t data;
fp@1122:     ec_ioctl_slave_t slave;
fp@1122:     stringstream err;
fp@1122:     uint8_t crc;
fp@1122: 
fp@1122:     masterDev.getSlave(&slave, slavePosition);
fp@1122: 
fp@1122:     if (slave.sii_nwords < 8) {
fp@1122:         err << "Current SII contents are too small to set an alias "
fp@1122:             << "(" << slave.sii_nwords << " words)!";
fp@1136:         throw CommandException(err);
fp@1122:     }
fp@1122: 
fp@1122:     // read first 8 SII words
fp@1122:     data.slave_position = slavePosition;
fp@1122:     data.offset = 0;
fp@1122:     data.nwords = 8;
fp@1122:     data.words = new uint16_t[data.nwords];
fp@1122: 
fp@1122:     try {
fp@1122:         masterDev.readSii(&data);
fp@1122:     } catch (MasterDeviceException &e) {
fp@1122:         delete [] data.words;
fp@1122:         err << "Failed to read SII: " << e.what();
fp@1136:         throw CommandException(err);
fp@1122:     }
fp@1122: 
fp@1122:     // write new alias address in word 4
fp@1122:     data.words[4] = cputole16(alias);
fp@1122: 
fp@1122:     // calculate checksum over words 0 to 6
fp@1122:     crc = calcSiiCrc((const uint8_t *) data.words, 14);
fp@1122: 
fp@1122:     // write new checksum into first byte of word 7
fp@1122:     *(uint8_t *) (data.words + 7) = crc;
fp@1122: 
fp@1122:     // write first 8 words with new alias and checksum
fp@1122:     try {
fp@1122:         masterDev.writeSii(&data);
fp@1122:     } catch (MasterDeviceException &e) {
fp@1122:         delete [] data.words;
fp@1122:         err << "Failed to read SII: " << e.what();
fp@1136:         throw CommandException(err);
fp@1122:     }
fp@1122: 
fp@1122:     delete [] data.words;
fp@1122: }
fp@1122: 
fp@1122: /*****************************************************************************/