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ethercat
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ethercat/master/canopen.c

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/******************************************************************************
*
* c a n o p e n . c
*
* CANopen over EtherCAT
*
* $Id$
*
*****************************************************************************/
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/module.h>
#include "master.h"
/*****************************************************************************/
void ec_canopen_abort_msg(uint32_t);
int ec_slave_fetch_sdo_descriptions(ec_slave_t *);
/*****************************************************************************/
/**
SDO Abort Code Messages
*/
typedef struct
{
uint32_t code;
const char *message;
}
ec_sdo_abort_message_t;
const ec_sdo_abort_message_t sdo_abort_messages[];
/*****************************************************************************/
/**
Beschreibt ein CANopen-SDO eines Slaves im Expedited-Modus.
\return 0 wenn alles ok, < 0 bei Fehler
*/
int ec_slave_sdo_write_exp(ec_slave_t *slave, /**< EtherCAT-Slave */
uint16_t sdo_index, /**< SDO-Index */
uint8_t sdo_subindex, /**< SDO-Subindex */
const uint8_t *sdo_data, /**< Neuer Wert */
size_t size
)
{
uint8_t data[0x0A];
size_t rec_size;
if (size == 0 || size > 4) {
EC_ERR("Invalid data size!\n");
return -1;
}
EC_WRITE_U16(data, 0x2000); // SDO request
EC_WRITE_U8 (data + 2, 0x23 | (4 - size) << 2); // expedited, size specif.
EC_WRITE_U16(data + 3, sdo_index);
EC_WRITE_U8 (data + 5, sdo_subindex);
memcpy(data + 6, sdo_data, size);
if (size < 4) memset(data + 6 + size, 0x00, 4 - size);
// Mailox senden und empfangen
if (ec_slave_mailbox_send(slave, 0x03, data, 0x0A)) return -1;
rec_size = 0x0A;
if (ec_slave_mailbox_receive(slave, 0x03, data, &rec_size)) return -1;
if (EC_READ_U16(data) >> 12 == 0x02 && // SDO request
EC_READ_U8 (data + 2) >> 5 == 0x04) { // Abort SDO transfer request
EC_ERR("SDO download of 0x%04X:%X (%i bytes) aborted on!"
" slave %i.\n", sdo_index, sdo_subindex, size,
slave->ring_position);
ec_canopen_abort_msg(EC_READ_U32(data + 6));
return -1;
}
if (EC_READ_U16(data) >> 12 != 0x03 || // SDO response
EC_READ_U8 (data + 2) >> 5 != 0x03 || // Download response
EC_READ_U16(data + 3) != sdo_index || // Index
EC_READ_U8 (data + 5) != sdo_subindex) // Subindex
{
EC_ERR("Invalid SDO download response at slave %i!\n",
slave->ring_position);
return -1;
}
return 0;
}
/*****************************************************************************/
/**
Liest 32-Bit eines CANopen-SDOs im Expedited-Modus aus einem Slave.
\return 0 wenn alles ok, < 0 bei Fehler
*/
int ec_slave_sdo_read_exp(ec_slave_t *slave, /**< EtherCAT-Slave */
uint16_t sdo_index, /**< SDO-Index */
uint8_t sdo_subindex, /**< SDO-Subindex */
uint8_t *target /**< Speicher f<>r 4 Bytes */
)
{
uint8_t data[0x20];
size_t rec_size;
EC_WRITE_U16(data, 0x2000); // SDO request
EC_WRITE_U8 (data + 2, 0x42); // Upload request, expedited
EC_WRITE_U16(data + 3, sdo_index);
EC_WRITE_U8 (data + 5, sdo_subindex);
if (ec_slave_mailbox_send(slave, 0x03, data, 6)) return -1;
rec_size = 0x20;
if (ec_slave_mailbox_receive(slave, 0x03, data, &rec_size)) return -1;
if (EC_READ_U16(data) >> 12 == 0x02 && // SDO request
EC_READ_U8 (data + 2) >> 5 == 0x04) { // Abort SDO transfer request
EC_ERR("SDO upload of 0x%04X:%X aborted on slave %i.\n",
sdo_index, sdo_subindex, slave->ring_position);
ec_canopen_abort_msg(EC_READ_U32(data + 6));
return -1;
}
if (EC_READ_U16(data) >> 12 != 0x03 || // SDO response
EC_READ_U8 (data + 2) >> 5 != 0x02 || // Upload response
EC_READ_U16(data + 3) != sdo_index || // Index
EC_READ_U8 (data + 5) != sdo_subindex) { // Subindex
EC_ERR("Invalid SDO upload response at slave %i!\n",
slave->ring_position);
return -1;
}
memcpy(target, data + 6, 4);
return 0;
}
/*****************************************************************************/
/**
Liest ein CANopen-SDO aus einem Slave.
\return 0 wenn alles ok, < 0 bei Fehler
*/
int ecrt_slave_sdo_read(ec_slave_t *slave, /**< EtherCAT-Slave */
uint16_t sdo_index, /**< SDO-Index */
uint8_t sdo_subindex, /**< SDO-Subindex */
uint8_t *target, /**< Speicher f<>r gel. Wert */
size_t *size /**< Gr<47><72>e des Speichers */
)
{
uint8_t data[0x20];
size_t rec_size, data_size;
uint32_t complete_size;
EC_WRITE_U16(data, 0x2000); // SDO request
EC_WRITE_U8 (data + 2, 0x2 << 5); // Initiate upload request
EC_WRITE_U16(data + 3, sdo_index);
EC_WRITE_U8 (data + 5, sdo_subindex);
if (ec_slave_mailbox_send(slave, 0x03, data, 6)) return -1;
rec_size = 0x20;
if (ec_slave_mailbox_receive(slave, 0x03, data, &rec_size)) return -1;
if (EC_READ_U16(data) >> 12 == 0x02 && // SDO request
EC_READ_U8 (data + 2) >> 5 == 0x04) { // Abort SDO transfer request
EC_ERR("SDO upload of 0x%04X:%X aborted on slave %i.\n",
sdo_index, sdo_subindex, slave->ring_position);
ec_canopen_abort_msg(EC_READ_U32(data + 6));
return -1;
}
if (EC_READ_U16(data) >> 12 != 0x03 || // SDO response
EC_READ_U8 (data + 2) >> 5 != 0x02 || // Initiate upload response
EC_READ_U16(data + 3) != sdo_index || // Index
EC_READ_U8 (data + 5) != sdo_subindex) { // Subindex
EC_ERR("Invalid SDO upload response at slave %i!\n",
slave->ring_position);
return -1;
}
if (rec_size < 10) {
EC_ERR("Received currupted SDO upload response!\n");
return -1;
}
if ((complete_size = EC_READ_U32(data + 6)) > *size) {
EC_ERR("SDO data does not fit into buffer (%i / %i)!\n",
complete_size, *size);
return -1;
}
data_size = rec_size - 10;
if (data_size == complete_size) {
memcpy(target, data + 10, data_size);
}
else {
EC_ERR("SDO data incomplete.\n");
return -1;
}
return 0;
}
/*****************************************************************************/
/**
Holt das Object-Dictionary aus dem Slave.
\return 0, wenn alles ok, sonst < 0
*/
int ec_slave_fetch_sdo_list(ec_slave_t *slave /**< EtherCAT-Slave */)
{
uint8_t data[0xF0];
size_t rec_size;
unsigned int i, sdo_count;
ec_sdo_t *sdo;
uint16_t sdo_index;
EC_WRITE_U16(data, 0x8000); // SDO information
EC_WRITE_U8 (data + 2, 0x01); // Get OD List Request
EC_WRITE_U8 (data + 3, 0x00);
EC_WRITE_U16(data + 4, 0x0000);
EC_WRITE_U16(data + 6, 0x0001); // Deliver all SDOs!
if (ec_slave_mailbox_send(slave, 0x03, data, 8)) return -1;
do {
rec_size = 0xF0;
if (ec_slave_mailbox_receive(slave, 0x03, data, &rec_size)) return -1;
if (EC_READ_U16(data) >> 12 == 0x08 && // SDO information
(EC_READ_U8(data + 2) & 0x7F) == 0x07) { // Error response
EC_ERR("SDO information error response at slave %i!\n",
slave->ring_position);
ec_canopen_abort_msg(EC_READ_U32(data + 6));
return -1;
}
if (EC_READ_U16(data) >> 12 != 0x08 || // SDO information
(EC_READ_U8 (data + 2) & 0x7F) != 0x02) { // Get OD List response
EC_ERR("Invalid SDO list response at slave %i!\n",
slave->ring_position);
return -1;
}
if (rec_size < 8) {
EC_ERR("Invalid data size!\n");
return -1;
}
sdo_count = (rec_size - 8) / 2;
for (i = 0; i < sdo_count; i++) {
sdo_index = EC_READ_U16(data + 8 + i * 2);
if (!sdo_index) continue; // Manchmal ist der Index 0... ???
if (!(sdo = (ec_sdo_t *) kmalloc(sizeof(ec_sdo_t), GFP_KERNEL))) {
EC_ERR("Failed to allocate memory for SDO!\n");
return -1;
}
sdo->index = sdo_index;
sdo->name = NULL;
list_add_tail(&sdo->list, &slave->sdo_dictionary);
}
} while (EC_READ_U8(data + 2) & 0x80);
// Jetzt alle Beschreibungen holen
if (ec_slave_fetch_sdo_descriptions(slave)) return -1;
return 0;
}
/*****************************************************************************/
/**
Holt die Beschreibungen zu allen bereits bekannten SDOs.
\return 0, wenn alles ok, sonst < 0
*/
int ec_slave_fetch_sdo_descriptions(ec_slave_t *slave /**< EtherCAT-Slave */)
{
uint8_t data[0xF0];
size_t rec_size, name_size;
ec_sdo_t *sdo;
list_for_each_entry(sdo, &slave->sdo_dictionary, list) {
EC_WRITE_U16(data, 0x8000); // SDO information
EC_WRITE_U8 (data + 2, 0x03); // Get object description request
EC_WRITE_U8 (data + 3, 0x00);
EC_WRITE_U16(data + 4, 0x0000);
EC_WRITE_U16(data + 6, sdo->index); // SDO index
if (ec_slave_mailbox_send(slave, 0x03, data, 8)) return -1;
rec_size = 0xF0;
if (ec_slave_mailbox_receive(slave, 0x03, data, &rec_size))
return -1;
if (EC_READ_U16(data) >> 12 == 0x08 && // SDO information
(EC_READ_U8 (data + 2) & 0x7F) == 0x07) { // Error response
EC_ERR("SDO information error response at slave %i while"
" fetching SDO 0x%04X!\n", slave->ring_position,
sdo->index);
ec_canopen_abort_msg(EC_READ_U32(data + 6));
return -1;
}
if (EC_READ_U16(data) >> 12 != 0x08 || // SDO information
(EC_READ_U8 (data + 2) & 0x7F) != 0x04 || // Obj. desc. resp.
EC_READ_U16(data + 6) != sdo->index) { // SDO index
EC_ERR("Invalid object description response at slave %i while"
" fetching SDO 0x%04X!\n", slave->ring_position,
sdo->index);
return -1;
}
if (rec_size < 12) {
EC_ERR("Invalid data size!\n");
return -1;
}
sdo->type = EC_READ_U16(data + 8);
sdo->max_subindex = EC_READ_U8(data + 10);
sdo->features = EC_READ_U8(data + 11);
name_size = rec_size - 12;
if (!name_size) {
EC_WARN("Object 0x%04X name size is 0...", sdo->index);
continue;
}
if (!(sdo->name = kmalloc(name_size + 1, GFP_KERNEL))) {
EC_ERR("Failed to allocate SDO name!\n");
return -1;
}
memcpy(sdo->name, data + 12, name_size);
sdo->name[name_size] = 0;
if (EC_READ_U8(data + 2) & 0x80)
EC_WARN("Fragment follows in object description!\n");
}
return 0;
}
/*****************************************************************************/
/**
Gibt eine SDO-Abort-Meldung aus.
*/
void ec_canopen_abort_msg(uint32_t abort_code)
{
const ec_sdo_abort_message_t *abort_msg;
for (abort_msg = sdo_abort_messages; abort_msg->code; abort_msg++) {
if (abort_msg->code == abort_code) {
EC_ERR("SDO abort message 0x%08X: \"%s\".\n",
abort_msg->code, abort_msg->message);
return;
}
}
EC_ERR("Unknown SDO abort code 0x%08X.\n", abort_code);
}
/*****************************************************************************/
const ec_sdo_abort_message_t sdo_abort_messages[] = {
{0x05030000, "Toggle bit not changed"},
{0x05040000, "SDO protocol timeout"},
{0x05040001, "Client/Server command specifier not valid or unknown"},
{0x05040005, "Out of memory"},
{0x06010000, "Unsupported access to an object"},
{0x06010001, "Attempt to read a write-only object"},
{0x06010002, "Attempt to write a read-only object"},
{0x06020000, "This object does not exist in the object directory"},
{0x06040041, "The object cannot be mapped into the PDO"},
{0x06040042, "The number and length of the objects to be mapped would"
" exceed the PDO length"},
{0x06040043, "General parameter incompatibility reason"},
{0x06040047, "Gerneral internal incompatibility in device"},
{0x06060000, "Access failure due to a hardware error"},
{0x06070010, "Data type does not match, length of service parameter does"
" not match"},
{0x06070012, "Data type does not match, length of service parameter too"
" high"},
{0x06070013, "Data type does not match, length of service parameter too"
" low"},
{0x06090011, "Subindex does not exist"},
{0x06090030, "Value range of parameter exceeded"},
{0x06090031, "Value of parameter written too high"},
{0x06090032, "Value of parameter written too low"},
{0x06090036, "Maximum value is less than minimum value"},
{0x08000000, "General error"},
{0x08000020, "Data cannot be transferred or stored to the application"},
{0x08000021, "Data cannot be transferred or stored to the application"
" because of local control"},
{0x08000022, "Data cannot be transferred or stored to the application"
" because of the present device state"},
{0x08000023, "Object dictionary dynamic generation fails or no object"
" dictionary is present"},
{}
};
/*****************************************************************************/
// Echtzeitschnittstelle
/*****************************************************************************/
/**
Liest ein 8-Bit CANopen-SDO im Expedited-Modus aus einem Slave.
Siehe ec_slave_sdo_read_exp()
\return 0 wenn alles ok, < 0 bei Fehler
*/
int ecrt_slave_sdo_read_exp8(ec_slave_t *slave, /**< EtherCAT-Slave */
uint16_t sdo_index, /**< SDO-Index */
uint8_t sdo_subindex, /**< SDO-Subindex */
uint8_t *target /**< Speicher f<>r gel. Wert */
)
{
uint8_t data[4];
if (ec_slave_sdo_read_exp(slave, sdo_index, sdo_subindex, data)) return -1;
*target = EC_READ_U8(data);
return 0;
}
/*****************************************************************************/
/**
Liest ein 16-Bit CANopen-SDO im Expedited-Modus aus einem Slave.
Siehe ec_slave_sdo_read_exp()
\return 0 wenn alles ok, < 0 bei Fehler
*/
int ecrt_slave_sdo_read_exp16(ec_slave_t *slave, /**< EtherCAT-Slave */
uint16_t sdo_index, /**< SDO-Index */
uint8_t sdo_subindex, /**< SDO-Subindex */
uint16_t *target /**< Speicher f<>r gel. Wert */
)
{
uint8_t data[4];
if (ec_slave_sdo_read_exp(slave, sdo_index, sdo_subindex, data)) return -1;
*target = EC_READ_U16(data);
return 0;
}
/*****************************************************************************/
/**
Liest ein 32-Bit CANopen-SDO im Expedited-Modus aus einem Slave.
Siehe ec_slave_sdo_read_exp()
\return 0 wenn alles ok, < 0 bei Fehler
*/
int ecrt_slave_sdo_read_exp32(ec_slave_t *slave, /**< EtherCAT-Slave */
uint16_t sdo_index, /**< SDO-Index */
uint8_t sdo_subindex, /**< SDO-Subindex */
uint32_t *target /**< Speicher f<>r gel. Wert */
)
{
uint8_t data[4];
if (ec_slave_sdo_read_exp(slave, sdo_index, sdo_subindex, data)) return -1;
*target = EC_READ_U32(data);
return 0;
}
/*****************************************************************************/
/**
Beschreibt ein 8-Bit CANopen-SDO eines Slaves im Expedited-Modus.
\return 0 wenn alles ok, < 0 bei Fehler
*/
int ecrt_slave_sdo_write_exp8(ec_slave_t *slave, /**< EtherCAT-Slave */
uint16_t sdo_index, /**< SDO-Index */
uint8_t sdo_subindex, /**< SDO-Subindex */
uint8_t value /**< Neuer Wert */
)
{
return ec_slave_sdo_write_exp(slave, sdo_index, sdo_subindex, &value, 1);
}
/*****************************************************************************/
/**
Beschreibt ein 16-Bit CANopen-SDO eines Slaves im Expedited-Modus.
\return 0 wenn alles ok, < 0 bei Fehler
*/
int ecrt_slave_sdo_write_exp16(ec_slave_t *slave, /**< EtherCAT-Slave */
uint16_t sdo_index, /**< SDO-Index */
uint8_t sdo_subindex, /**< SDO-Subindex */
uint16_t value /**< Neuer Wert */
)
{
uint8_t data[2];
EC_WRITE_U16(data, value);
return ec_slave_sdo_write_exp(slave, sdo_index, sdo_subindex, data, 2);
}
/*****************************************************************************/
/**
Beschreibt ein 32-Bit CANopen-SDO eines Slaves im Expedited-Modus.
\return 0 wenn alles ok, < 0 bei Fehler
*/
int ecrt_slave_sdo_write_exp32(ec_slave_t *slave, /**< EtherCAT-Slave */
uint16_t sdo_index, /**< SDO-Index */
uint8_t sdo_subindex, /**< SDO-Subindex */
uint32_t value /**< Neuer Wert */
)
{
uint8_t data[4];
EC_WRITE_U32(data, value);
return ec_slave_sdo_write_exp(slave, sdo_index, sdo_subindex, data, 4);
}
/*****************************************************************************/
EXPORT_SYMBOL(ecrt_slave_sdo_read_exp8);
EXPORT_SYMBOL(ecrt_slave_sdo_read_exp16);
EXPORT_SYMBOL(ecrt_slave_sdo_read_exp32);
EXPORT_SYMBOL(ecrt_slave_sdo_write_exp8);
EXPORT_SYMBOL(ecrt_slave_sdo_write_exp16);
EXPORT_SYMBOL(ecrt_slave_sdo_write_exp32);
EXPORT_SYMBOL(ecrt_slave_sdo_read);
/*****************************************************************************/
/* Emacs-Konfiguration
;;; Local Variables: ***
;;; c-basic-offset:4 ***
;;; End: ***
*/
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