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ethercat/master/fsm_pdo_mapping.c

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/******************************************************************************
*
* $Id$
*
* Copyright (C) 2006 Florian Pose, Ingenieurgemeinschaft IgH
*
* This file is part of the IgH EtherCAT Master.
*
* The IgH EtherCAT Master is free software; you can redistribute it
* and/or modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* The IgH EtherCAT Master is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the IgH EtherCAT Master; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* The right to use EtherCAT Technology is granted and comes free of
* charge under condition of compatibility of product made by
* Licensee. People intending to distribute/sell products based on the
* code, have to sign an agreement to guarantee that products using
* software based on IgH EtherCAT master stay compatible with the actual
* EtherCAT specification (which are released themselves as an open
* standard) as the (only) precondition to have the right to use EtherCAT
* Technology, IP and trade marks.
*
*****************************************************************************/
/** \file
* EtherCAT Pdo mapping state machine.
*/
/*****************************************************************************/
#include "globals.h"
#include "master.h"
#include "mailbox.h"
#include "slave_config.h"
#include "fsm_pdo_mapping.h"
/*****************************************************************************/
void ec_fsm_pdo_mapping_state_start(ec_fsm_pdo_mapping_t *);
void ec_fsm_pdo_mapping_state_zero_count(ec_fsm_pdo_mapping_t *);
void ec_fsm_pdo_mapping_state_add_entry(ec_fsm_pdo_mapping_t *);
void ec_fsm_pdo_mapping_state_entry_count(ec_fsm_pdo_mapping_t *);
void ec_fsm_pdo_mapping_state_end(ec_fsm_pdo_mapping_t *);
void ec_fsm_pdo_mapping_state_error(ec_fsm_pdo_mapping_t *);
void ec_fsm_pdo_mapping_next_pdo(ec_fsm_pdo_mapping_t *);
/*****************************************************************************/
/** Constructor.
*/
void ec_fsm_pdo_mapping_init(
ec_fsm_pdo_mapping_t *fsm, /**< Pdo mapping state machine. */
ec_fsm_coe_t *fsm_coe /**< CoE state machine to use. */
)
{
fsm->fsm_coe = fsm_coe;
ec_sdo_request_init(&fsm->request);
}
/*****************************************************************************/
/** Destructor.
*/
void ec_fsm_pdo_mapping_clear(
ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
ec_sdo_request_clear(&fsm->request);
}
/*****************************************************************************/
/** Start Pdo mapping state machine.
*/
void ec_fsm_pdo_mapping_start(
ec_fsm_pdo_mapping_t *fsm, /**< Pdo mapping state machine. */
ec_slave_t *slave /**< slave to configure */
)
{
fsm->slave = slave;
fsm->state = ec_fsm_pdo_mapping_state_start;
}
/*****************************************************************************/
/** Get running state.
*
* \return false, if state machine has terminated
*/
int ec_fsm_pdo_mapping_running(
const ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
return fsm->state != ec_fsm_pdo_mapping_state_end
&& fsm->state != ec_fsm_pdo_mapping_state_error;
}
/*****************************************************************************/
/** Executes the current state.
*
* \return false, if state machine has terminated
*/
int ec_fsm_pdo_mapping_exec(
ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
fsm->state(fsm);
return ec_fsm_pdo_mapping_running(fsm);
}
/*****************************************************************************/
/** Get execution result.
*
* \return true, if the state machine terminated gracefully
*/
int ec_fsm_pdo_mapping_success(
const ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
return fsm->state == ec_fsm_pdo_mapping_state_end;
}
/******************************************************************************
* State functions.
*****************************************************************************/
/** Start Pdo mapping.
*/
void ec_fsm_pdo_mapping_state_start(
ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
if (!fsm->slave->config) {
fsm->state = ec_fsm_pdo_mapping_state_end;
return;
}
fsm->pdo = NULL;
fsm->num_configured_pdos = 0;
ec_fsm_pdo_mapping_next_pdo(fsm);
}
/*****************************************************************************/
/** Process mapping of next Pdo.
*/
void ec_fsm_pdo_mapping_next_pdo(
ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
uint8_t sync_index;
const ec_pdo_list_t *pdos;
const ec_pdo_t *pdo, *assigned_pdo;
for (sync_index = 0; sync_index < EC_MAX_SYNC_MANAGERS; sync_index++) {
pdos = &fsm->slave->config->sync_configs[sync_index].pdos;
list_for_each_entry(pdo, &pdos->list, list) {
if (fsm->pdo) { // there was a Pdo mapping changed in the last run
if (pdo == fsm->pdo) // this is the previously configured Pdo
fsm->pdo = NULL; // take the next one
} else {
if ((assigned_pdo = ec_slave_find_pdo(fsm->slave, pdo->index)))
if (ec_pdo_equal_entries(pdo, assigned_pdo))
continue; // Pdo entries mapped correctly
fsm->pdo = pdo;
fsm->num_configured_pdos++;
break;
}
}
}
if (!fsm->pdo) {
if (fsm->slave->master->debug_level && !fsm->num_configured_pdos)
EC_DBG("Pdo mappings are already configured correctly.\n");
fsm->state = ec_fsm_pdo_mapping_state_end;
return;
}
// Pdo mapping has to be changed. Does the slave support this?
if (!(fsm->slave->sii.mailbox_protocols & EC_MBOX_COE)
|| (fsm->slave->sii.has_general
&& !fsm->slave->sii.coe_details.enable_pdo_configuration)) {
EC_WARN("Slave %u does not support Pdo mapping configuration!\n",
fsm->slave->ring_position);
fsm->state = ec_fsm_pdo_mapping_state_error;
return;
}
if (fsm->slave->master->debug_level) {
EC_DBG("Changing mapping of Pdo 0x%04X.\n", fsm->pdo->index);
}
if (ec_sdo_request_alloc(&fsm->request, 4)) {
fsm->state = ec_fsm_pdo_mapping_state_error;
return;
}
// set mapped Pdo count to zero
EC_WRITE_U8(fsm->request.data, 0);
fsm->request.data_size = 1;
ec_sdo_request_address(&fsm->request, fsm->pdo->index, 0);
ecrt_sdo_request_write(&fsm->request);
if (fsm->slave->master->debug_level)
EC_DBG("Setting entry count to zero.\n");
fsm->state = ec_fsm_pdo_mapping_state_zero_count;
ec_fsm_coe_transfer(fsm->fsm_coe, fsm->slave, &fsm->request);
ec_fsm_coe_exec(fsm->fsm_coe); // execute immediately
}
/*****************************************************************************/
/** Process next Pdo entry.
*/
ec_pdo_entry_t *ec_fsm_pdo_mapping_next_entry(
const ec_fsm_pdo_mapping_t *fsm, /**< Pdo mapping state machine. */
const struct list_head *list /**< current entry list item */
)
{
list = list->next;
if (list == &fsm->pdo->entries)
return NULL; // no next entry
return list_entry(list, ec_pdo_entry_t, list);
}
/*****************************************************************************/
/** Starts to add a Pdo entry.
*/
void ec_fsm_pdo_mapping_add_entry(
ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
uint32_t value;
if (fsm->slave->master->debug_level)
EC_DBG("Mapping Pdo entry 0x%04X:%02X (%u bit) at position %u.\n",
fsm->entry->index, fsm->entry->subindex,
fsm->entry->bit_length, fsm->entry_count);
value = fsm->entry->index << 16
| fsm->entry->subindex << 8 | fsm->entry->bit_length;
EC_WRITE_U32(fsm->request.data, value);
fsm->request.data_size = 4;
ec_sdo_request_address(&fsm->request, fsm->pdo->index, fsm->entry_count);
ecrt_sdo_request_write(&fsm->request);
fsm->state = ec_fsm_pdo_mapping_state_add_entry;
ec_fsm_coe_transfer(fsm->fsm_coe, fsm->slave, &fsm->request);
ec_fsm_coe_exec(fsm->fsm_coe); // execute immediately
}
/*****************************************************************************/
/** Set the number of mapped entries to zero.
*/
void ec_fsm_pdo_mapping_state_zero_count(
ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
if (ec_fsm_coe_exec(fsm->fsm_coe)) return;
if (!ec_fsm_coe_success(fsm->fsm_coe)) {
EC_WARN("Failed to clear mapping of Pdo 0x%04X.\n", fsm->pdo->index);
fsm->state = ec_fsm_pdo_mapping_state_error;
return;
}
// find first entry
if (!(fsm->entry =
ec_fsm_pdo_mapping_next_entry(fsm, &fsm->pdo->entries))) {
if (fsm->slave->master->debug_level)
EC_DBG("No entries to map.\n");
ec_fsm_pdo_mapping_next_pdo(fsm);
return;
}
// add first entry
fsm->entry_count = 1;
ec_fsm_pdo_mapping_add_entry(fsm);
}
/*****************************************************************************/
/** Add a Pdo entry.
*/
void ec_fsm_pdo_mapping_state_add_entry(
ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
if (ec_fsm_coe_exec(fsm->fsm_coe)) return;
if (!ec_fsm_coe_success(fsm->fsm_coe)) {
EC_WARN("Failed to map Pdo entry 0x%04X:%02X at 0x%04X:%02X.\n",
fsm->entry->index, fsm->entry->subindex, fsm->pdo->index,
fsm->entry_count);
fsm->state = ec_fsm_pdo_mapping_state_error;
return;
}
// find next entry
if (!(fsm->entry = ec_fsm_pdo_mapping_next_entry(fsm, &fsm->entry->list))) {
// No more entries to add. Write entry count.
EC_WRITE_U8(fsm->request.data, fsm->entry_count);
fsm->request.data_size = 1;
ec_sdo_request_address(&fsm->request, fsm->pdo->index, 0);
ecrt_sdo_request_write(&fsm->request);
if (fsm->slave->master->debug_level)
EC_DBG("Setting number of Pdo entries to %u.\n", fsm->entry_count);
fsm->state = ec_fsm_pdo_mapping_state_entry_count;
ec_fsm_coe_transfer(fsm->fsm_coe, fsm->slave, &fsm->request);
ec_fsm_coe_exec(fsm->fsm_coe); // execute immediately
return;
}
// add next entry
fsm->entry_count++;
ec_fsm_pdo_mapping_add_entry(fsm);
}
/*****************************************************************************/
/** Set the number of entries.
*/
void ec_fsm_pdo_mapping_state_entry_count(
ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
if (ec_fsm_coe_exec(fsm->fsm_coe)) return;
if (!ec_fsm_coe_success(fsm->fsm_coe)) {
EC_WARN("Failed to set number of entries for Pdo 0x%04X.\n",
fsm->pdo->index);
fsm->state = ec_fsm_pdo_mapping_state_error;
return;
}
if (fsm->slave->master->debug_level)
EC_DBG("Pdo mapping configuration successful.\n");
ec_fsm_pdo_mapping_next_pdo(fsm);
}
/******************************************************************************
* Common state functions
*****************************************************************************/
/** State: ERROR.
*/
void ec_fsm_pdo_mapping_state_error(
ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
}
/*****************************************************************************/
/** State: END.
*/
void ec_fsm_pdo_mapping_state_end(
ec_fsm_pdo_mapping_t *fsm /**< Pdo mapping state machine. */
)
{
}
/*****************************************************************************/
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