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ethercatmain.c
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ethercatmain.c
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/*
* Licensed under the GNU General Public License version 2 with exceptions. See
* LICENSE file in the project root for full license information
*/
/**
* \file
* \brief
* Main EtherCAT functions.
*
* Initialisation, state set and read, mailbox primitives, EEPROM primitives,
* SII reading and processdata exchange.
*
* Defines ec_slave[]. All slave information is put in this structure.
* Needed for most user interaction with slaves.
*/
#include <stdio.h>
#include <string.h>
#include "osal.h"
#include "oshw.h"
#include "ethercat.h"
/** delay in us for eeprom ready loop */
#define EC_LOCALDELAY 200
/** record for ethercat eeprom communications */
PACKED_BEGIN
typedef struct PACKED
{
uint16 comm;
uint16 addr;
uint16 d2;
} ec_eepromt;
PACKED_END
/** mailbox error structure */
PACKED_BEGIN
typedef struct PACKED
{
ec_mbxheadert MbxHeader;
uint16 Type;
uint16 Detail;
} ec_mbxerrort;
PACKED_END
/** emergency request structure */
PACKED_BEGIN
typedef struct PACKED
{
ec_mbxheadert MbxHeader;
uint16 CANOpen;
uint16 ErrorCode;
uint8 ErrorReg;
uint8 bData;
uint16 w1,w2;
} ec_emcyt;
PACKED_END
#ifdef EC_VER1
/** Main slave data array.
* Each slave found on the network gets its own record.
* ec_slave[0] is reserved for the master. Structure gets filled
* in by the configuration function ec_config().
*/
ec_slavet ec_slave[EC_MAXSLAVE];
/** number of slaves found on the network */
int ec_slavecount;
/** slave group structure */
ec_groupt ec_group[EC_MAXGROUP];
/** cache for EEPROM read functions */
static uint8 ec_esibuf[EC_MAXEEPBUF];
/** bitmap for filled cache buffer bytes */
static uint32 ec_esimap[EC_MAXEEPBITMAP];
/** current slave for EEPROM cache buffer */
static ec_eringt ec_elist;
static ec_idxstackT ec_idxstack;
/** SyncManager Communication Type struct to store data of one slave */
static ec_SMcommtypet ec_SMcommtype[EC_MAX_MAPT];
/** PDO assign struct to store data of one slave */
static ec_PDOassignt ec_PDOassign[EC_MAX_MAPT];
/** PDO description struct to store data of one slave */
static ec_PDOdesct ec_PDOdesc[EC_MAX_MAPT];
/** buffer for EEPROM SM data */
static ec_eepromSMt ec_SM;
/** buffer for EEPROM FMMU data */
static ec_eepromFMMUt ec_FMMU;
/** Global variable TRUE if error available in error stack */
boolean EcatError = FALSE;
int64 ec_DCtime;
ecx_portt ecx_port;
ecx_redportt ecx_redport;
ecx_contextt ecx_context = {
&ecx_port, // .port =
&ec_slave[0], // .slavelist =
&ec_slavecount, // .slavecount =
EC_MAXSLAVE, // .maxslave =
&ec_group[0], // .grouplist =
EC_MAXGROUP, // .maxgroup =
&ec_esibuf[0], // .esibuf =
&ec_esimap[0], // .esimap =
0, // .esislave =
&ec_elist, // .elist =
&ec_idxstack, // .idxstack =
&EcatError, // .ecaterror =
&ec_DCtime, // .DCtime =
&ec_SMcommtype[0], // .SMcommtype =
&ec_PDOassign[0], // .PDOassign =
&ec_PDOdesc[0], // .PDOdesc =
&ec_SM, // .eepSM =
&ec_FMMU, // .eepFMMU =
NULL, // .FOEhook()
NULL, // .EOEhook()
0, // .manualstatechange
NULL, // .userdata
};
#endif
/** Create list over available network adapters.
*
* @return First element in list over available network adapters.
*/
ec_adaptert * ec_find_adapters (void)
{
ec_adaptert * ret_adapter;
ret_adapter = oshw_find_adapters ();
return ret_adapter;
}
/** Free dynamically allocated list over available network adapters.
*
* @param[in] adapter = Struct holding adapter name, description and pointer to next.
*/
void ec_free_adapters (ec_adaptert * adapter)
{
oshw_free_adapters (adapter);
}
/** Pushes an error on the error list.
*
* @param[in] context = context struct
* @param[in] Ec pointer describing the error.
*/
void ecx_pusherror(ecx_contextt *context, const ec_errort *Ec)
{
context->elist->Error[context->elist->head] = *Ec;
context->elist->Error[context->elist->head].Signal = TRUE;
context->elist->head++;
if (context->elist->head > EC_MAXELIST)
{
context->elist->head = 0;
}
if (context->elist->head == context->elist->tail)
{
context->elist->tail++;
}
if (context->elist->tail > EC_MAXELIST)
{
context->elist->tail = 0;
}
*(context->ecaterror) = TRUE;
}
/** Pops an error from the list.
*
* @param[in] context = context struct
* @param[out] Ec = Struct describing the error.
* @return TRUE if an error was popped.
*/
boolean ecx_poperror(ecx_contextt *context, ec_errort *Ec)
{
boolean notEmpty = (context->elist->head != context->elist->tail);
*Ec = context->elist->Error[context->elist->tail];
context->elist->Error[context->elist->tail].Signal = FALSE;
if (notEmpty)
{
context->elist->tail++;
if (context->elist->tail > EC_MAXELIST)
{
context->elist->tail = 0;
}
}
else
{
*(context->ecaterror) = FALSE;
}
return notEmpty;
}
/** Check if error list has entries.
*
* @param[in] context = context struct
* @return TRUE if error list contains entries.
*/
boolean ecx_iserror(ecx_contextt *context)
{
return (context->elist->head != context->elist->tail);
}
/** Report packet error
*
* @param[in] context = context struct
* @param[in] Slave = Slave number
* @param[in] Index = Index that generated error
* @param[in] SubIdx = Subindex that generated error
* @param[in] ErrorCode = Error code
*/
void ecx_packeterror(ecx_contextt *context, uint16 Slave, uint16 Index, uint8 SubIdx, uint16 ErrorCode)
{
ec_errort Ec;
memset(&Ec, 0, sizeof(Ec));
Ec.Time = osal_current_time();
Ec.Slave = Slave;
Ec.Index = Index;
Ec.SubIdx = SubIdx;
*(context->ecaterror) = TRUE;
Ec.Etype = EC_ERR_TYPE_PACKET_ERROR;
Ec.ErrorCode = ErrorCode;
ecx_pusherror(context, &Ec);
}
/** Report Mailbox Error
*
* @param[in] context = context struct
* @param[in] Slave = Slave number
* @param[in] Detail = Following EtherCAT specification
*/
static void ecx_mbxerror(ecx_contextt *context, uint16 Slave,uint16 Detail)
{
ec_errort Ec;
memset(&Ec, 0, sizeof(Ec));
Ec.Time = osal_current_time();
Ec.Slave = Slave;
Ec.Index = 0;
Ec.SubIdx = 0;
Ec.Etype = EC_ERR_TYPE_MBX_ERROR;
Ec.ErrorCode = Detail;
ecx_pusherror(context, &Ec);
}
/** Report Mailbox Emergency Error
*
* @param[in] context = context struct
* @param[in] Slave = Slave number
* @param[in] ErrorCode = Following EtherCAT specification
* @param[in] ErrorReg
* @param[in] b1
* @param[in] w1
* @param[in] w2
*/
static void ecx_mbxemergencyerror(ecx_contextt *context, uint16 Slave,uint16 ErrorCode,uint16 ErrorReg,
uint8 b1, uint16 w1, uint16 w2)
{
ec_errort Ec;
memset(&Ec, 0, sizeof(Ec));
Ec.Time = osal_current_time();
Ec.Slave = Slave;
Ec.Index = 0;
Ec.SubIdx = 0;
Ec.Etype = EC_ERR_TYPE_EMERGENCY;
Ec.ErrorCode = ErrorCode;
Ec.ErrorReg = (uint8)ErrorReg;
Ec.b1 = b1;
Ec.w1 = w1;
Ec.w2 = w2;
ecx_pusherror(context, &Ec);
}
/** Initialise lib in single NIC mode
* @param[in] context = context struct
* @param[in] ifname = Dev name, f.e. "eth0"
* @return >0 if OK
*/
int ecx_init(ecx_contextt *context, const char * ifname)
{
return ecx_setupnic(context->port, ifname, FALSE);
}
/** Initialise lib in redundant NIC mode
* @param[in] context = context struct
* @param[in] redport = pointer to redport, redundant port data
* @param[in] ifname = Primary Dev name, f.e. "eth0"
* @param[in] if2name = Secondary Dev name, f.e. "eth1"
* @return >0 if OK
*/
int ecx_init_redundant(ecx_contextt *context, ecx_redportt *redport, const char *ifname, char *if2name)
{
int rval, zbuf;
ec_etherheadert *ehp;
context->port->redport = redport;
ecx_setupnic(context->port, ifname, FALSE);
rval = ecx_setupnic(context->port, if2name, TRUE);
/* prepare "dummy" BRD tx frame for redundant operation */
ehp = (ec_etherheadert *)&(context->port->txbuf2);
ehp->sa1 = oshw_htons(secMAC[0]);
zbuf = 0;
ecx_setupdatagram(context->port, &(context->port->txbuf2), EC_CMD_BRD, 0, 0x0000, 0x0000, 2, &zbuf);
context->port->txbuflength2 = ETH_HEADERSIZE + EC_HEADERSIZE + EC_WKCSIZE + 2;
return rval;
}
/** Close lib.
* @param[in] context = context struct
*/
void ecx_close(ecx_contextt *context)
{
ecx_closenic(context->port);
};
/** Read one byte from slave EEPROM via cache.
* If the cache location is empty then a read request is made to the slave.
* Depending on the slave capabilities the request is 4 or 8 bytes.
* @param[in] context = context struct
* @param[in] slave = slave number
* @param[in] address = eeprom address in bytes (slave uses words)
* @return requested byte, if not available then 0xff
*/
uint8 ecx_siigetbyte(ecx_contextt *context, uint16 slave, uint16 address)
{
uint16 configadr, eadr;
uint64 edat64;
uint32 edat32;
uint16 mapw, mapb;
int lp,cnt;
uint8 retval;
retval = 0xff;
if (slave != context->esislave) /* not the same slave? */
{
memset(context->esimap, 0x00, EC_MAXEEPBITMAP * sizeof(uint32)); /* clear esibuf cache map */
context->esislave = slave;
}
if (address < EC_MAXEEPBUF)
{
mapw = address >> 5;
mapb = (uint16)(address - (mapw << 5));
if (context->esimap[mapw] & (1U << mapb))
{
/* byte is already in buffer */
retval = context->esibuf[address];
}
else
{
/* byte is not in buffer, put it there */
configadr = context->slavelist[slave].configadr;
ecx_eeprom2master(context, slave); /* set eeprom control to master */
eadr = address >> 1;
edat64 = ecx_readeepromFP (context, configadr, eadr, EC_TIMEOUTEEP);
/* 8 byte response */
if (context->slavelist[slave].eep_8byte)
{
put_unaligned64(edat64, &(context->esibuf[eadr << 1]));
cnt = 8;
}
/* 4 byte response */
else
{
edat32 = (uint32)edat64;
put_unaligned32(edat32, &(context->esibuf[eadr << 1]));
cnt = 4;
}
/* find bitmap location */
mapw = eadr >> 4;
mapb = (uint16)((eadr << 1) - (mapw << 5));
for(lp = 0 ; lp < cnt ; lp++)
{
/* set bitmap for each byte that is read */
context->esimap[mapw] |= (1U << mapb);
mapb++;
if (mapb > 31)
{
mapb = 0;
mapw++;
}
}
retval = context->esibuf[address];
}
}
return retval;
}
/** Find SII section header in slave EEPROM.
* @param[in] context = context struct
* @param[in] slave = slave number
* @param[in] cat = section category
* @return byte address of section at section length entry, if not available then 0
*/
int16 ecx_siifind(ecx_contextt *context, uint16 slave, uint16 cat)
{
int16 a;
uint16 p;
uint8 eectl = context->slavelist[slave].eep_pdi;
a = ECT_SII_START << 1;
/* read first SII section category */
p = ecx_siigetbyte(context, slave, a++);
p += (ecx_siigetbyte(context, slave, a++) << 8);
/* traverse SII while category is not found and not EOF */
while ((p != cat) && (p != 0xffff))
{
/* read section length */
p = ecx_siigetbyte(context, slave, a++);
p += (ecx_siigetbyte(context, slave, a++) << 8);
/* locate next section category */
a += p << 1;
/* read section category */
p = ecx_siigetbyte(context, slave, a++);
p += (ecx_siigetbyte(context, slave, a++) << 8);
}
if (p != cat)
{
a = 0;
}
if (eectl)
{
ecx_eeprom2pdi(context, slave); /* if eeprom control was previously pdi then restore */
}
return a;
}
/** Get string from SII string section in slave EEPROM.
* @param[in] context = context struct
* @param[out] str = requested string, 0x00 if not found
* @param[in] slave = slave number
* @param[in] Sn = string number
*/
void ecx_siistring(ecx_contextt *context, char *str, uint16 slave, uint16 Sn)
{
uint16 a,i,j,l,n,ba;
char *ptr;
uint8 eectl = context->slavelist[slave].eep_pdi;
ptr = str;
a = ecx_siifind (context, slave, ECT_SII_STRING); /* find string section */
if (a > 0)
{
ba = a + 2; /* skip SII section header */
n = ecx_siigetbyte(context, slave, ba++); /* read number of strings in section */
if (Sn <= n) /* is req string available? */
{
for (i = 1; i <= Sn; i++) /* walk through strings */
{
l = ecx_siigetbyte(context, slave, ba++); /* length of this string */
if (i < Sn)
{
ba += l;
}
else
{
ptr = str;
for (j = 1; j <= l; j++) /* copy one string */
{
if(j <= EC_MAXNAME)
{
*ptr = (char)ecx_siigetbyte(context, slave, ba++);
ptr++;
}
else
{
ba++;
}
}
}
}
*ptr = 0; /* add zero terminator */
}
else
{
ptr = str;
*ptr = 0; /* empty string */
}
}
if (eectl)
{
ecx_eeprom2pdi(context, slave); /* if eeprom control was previously pdi then restore */
}
}
/** Get FMMU data from SII FMMU section in slave EEPROM.
* @param[in] context = context struct
* @param[in] slave = slave number
* @param[out] FMMU = FMMU struct from SII, max. 4 FMMU's
* @return number of FMMU's defined in section
*/
uint16 ecx_siiFMMU(ecx_contextt *context, uint16 slave, ec_eepromFMMUt* FMMU)
{
uint16 a;
uint8 eectl = context->slavelist[slave].eep_pdi;
FMMU->nFMMU = 0;
FMMU->FMMU0 = 0;
FMMU->FMMU1 = 0;
FMMU->FMMU2 = 0;
FMMU->FMMU3 = 0;
FMMU->Startpos = ecx_siifind(context, slave, ECT_SII_FMMU);
if (FMMU->Startpos > 0)
{
a = FMMU->Startpos;
FMMU->nFMMU = ecx_siigetbyte(context, slave, a++);
FMMU->nFMMU += (ecx_siigetbyte(context, slave, a++) << 8);
FMMU->nFMMU *= 2;
FMMU->FMMU0 = ecx_siigetbyte(context, slave, a++);
FMMU->FMMU1 = ecx_siigetbyte(context, slave, a++);
if (FMMU->nFMMU > 2)
{
FMMU->FMMU2 = ecx_siigetbyte(context, slave, a++);
FMMU->FMMU3 = ecx_siigetbyte(context, slave, a++);
}
}
if (eectl)
{
ecx_eeprom2pdi(context, slave); /* if eeprom control was previously pdi then restore */
}
return FMMU->nFMMU;
}
/** Get SM data from SII SM section in slave EEPROM.
* @param[in] context = context struct
* @param[in] slave = slave number
* @param[out] SM = first SM struct from SII
* @return number of SM's defined in section
*/
uint16 ecx_siiSM(ecx_contextt *context, uint16 slave, ec_eepromSMt* SM)
{
uint16 a,w;
uint8 eectl = context->slavelist[slave].eep_pdi;
SM->nSM = 0;
SM->Startpos = ecx_siifind(context, slave, ECT_SII_SM);
if (SM->Startpos > 0)
{
a = SM->Startpos;
w = ecx_siigetbyte(context, slave, a++);
w += (ecx_siigetbyte(context, slave, a++) << 8);
SM->nSM = (uint8)(w / 4);
SM->PhStart = ecx_siigetbyte(context, slave, a++);
SM->PhStart += (ecx_siigetbyte(context, slave, a++) << 8);
SM->Plength = ecx_siigetbyte(context, slave, a++);
SM->Plength += (ecx_siigetbyte(context, slave, a++) << 8);
SM->Creg = ecx_siigetbyte(context, slave, a++);
SM->Sreg = ecx_siigetbyte(context, slave, a++);
SM->Activate = ecx_siigetbyte(context, slave, a++);
SM->PDIctrl = ecx_siigetbyte(context, slave, a++);
}
if (eectl)
{
ecx_eeprom2pdi(context, slave); /* if eeprom control was previously pdi then restore */
}
return SM->nSM;
}
/** Get next SM data from SII SM section in slave EEPROM.
* @param[in] context = context struct
* @param[in] slave = slave number
* @param[out] SM = first SM struct from SII
* @param[in] n = SM number
* @return >0 if OK
*/
uint16 ecx_siiSMnext(ecx_contextt *context, uint16 slave, ec_eepromSMt* SM, uint16 n)
{
uint16 a;
uint16 retVal = 0;
uint8 eectl = context->slavelist[slave].eep_pdi;
if (n < SM->nSM)
{
a = SM->Startpos + 2 + (n * 8);
SM->PhStart = ecx_siigetbyte(context, slave, a++);
SM->PhStart += (ecx_siigetbyte(context, slave, a++) << 8);
SM->Plength = ecx_siigetbyte(context, slave, a++);
SM->Plength += (ecx_siigetbyte(context, slave, a++) << 8);
SM->Creg = ecx_siigetbyte(context, slave, a++);
SM->Sreg = ecx_siigetbyte(context, slave, a++);
SM->Activate = ecx_siigetbyte(context, slave, a++);
SM->PDIctrl = ecx_siigetbyte(context, slave, a++);
retVal = 1;
}
if (eectl)
{
ecx_eeprom2pdi(context, slave); /* if eeprom control was previously pdi then restore */
}
return retVal;
}
/** Get PDO data from SII PDO section in slave EEPROM.
* @param[in] context = context struct
* @param[in] slave = slave number
* @param[out] PDO = PDO struct from SII
* @param[in] t = 0=RXPDO 1=TXPDO
* @return mapping size in bits of PDO
*/
uint32 ecx_siiPDO(ecx_contextt *context, uint16 slave, ec_eepromPDOt* PDO, uint8 t)
{
uint16 a , w, c, e, er, Size;
uint8 eectl = context->slavelist[slave].eep_pdi;
Size = 0;
PDO->nPDO = 0;
PDO->Length = 0;
PDO->Index[1] = 0;
for (c = 0 ; c < EC_MAXSM ; c++) PDO->SMbitsize[c] = 0;
if (t > 1)
t = 1;
PDO->Startpos = ecx_siifind(context, slave, ECT_SII_PDO + t);
if (PDO->Startpos > 0)
{
a = PDO->Startpos;
w = ecx_siigetbyte(context, slave, a++);
w += (ecx_siigetbyte(context, slave, a++) << 8);
PDO->Length = w;
c = 1;
/* traverse through all PDOs */
do
{
PDO->nPDO++;
PDO->Index[PDO->nPDO] = ecx_siigetbyte(context, slave, a++);
PDO->Index[PDO->nPDO] += (ecx_siigetbyte(context, slave, a++) << 8);
PDO->BitSize[PDO->nPDO] = 0;
c++;
e = ecx_siigetbyte(context, slave, a++);
PDO->SyncM[PDO->nPDO] = ecx_siigetbyte(context, slave, a++);
a += 4;
c += 2;
if (PDO->SyncM[PDO->nPDO] < EC_MAXSM) /* active and in range SM? */
{
/* read all entries defined in PDO */
for (er = 1; er <= e; er++)
{
c += 4;
a += 5;
PDO->BitSize[PDO->nPDO] += ecx_siigetbyte(context, slave, a++);
a += 2;
}
PDO->SMbitsize[ PDO->SyncM[PDO->nPDO] ] += PDO->BitSize[PDO->nPDO];
Size += PDO->BitSize[PDO->nPDO];
c++;
}
else /* PDO deactivated because SM is 0xff or > EC_MAXSM */
{
c += 4 * e;
a += 8 * e;
c++;
}
if (PDO->nPDO >= (EC_MAXEEPDO - 1))
{
c = PDO->Length; /* limit number of PDO entries in buffer */
}
}
while (c < PDO->Length);
}
if (eectl)
{
ecx_eeprom2pdi(context, slave); /* if eeprom control was previously pdi then restore */
}
return (Size);
}
#define MAX_FPRD_MULTI 64
int ecx_FPRD_multi(ecx_contextt *context, int n, uint16 *configlst, ec_alstatust *slstatlst, int timeout)
{
int wkc;
uint8 idx;
ecx_portt *port;
uint16 sldatapos[MAX_FPRD_MULTI];
int slcnt;
port = context->port;
idx = ecx_getindex(port);
slcnt = 0;
ecx_setupdatagram(port, &(port->txbuf[idx]), EC_CMD_FPRD, idx,
*(configlst + slcnt), ECT_REG_ALSTAT, sizeof(ec_alstatust), slstatlst + slcnt);
sldatapos[slcnt] = EC_HEADERSIZE;
while(++slcnt < (n - 1))
{
sldatapos[slcnt] = ecx_adddatagram(port, &(port->txbuf[idx]), EC_CMD_FPRD, idx, TRUE,
*(configlst + slcnt), ECT_REG_ALSTAT, sizeof(ec_alstatust), slstatlst + slcnt);
}
if(slcnt < n)
{
sldatapos[slcnt] = ecx_adddatagram(port, &(port->txbuf[idx]), EC_CMD_FPRD, idx, FALSE,
*(configlst + slcnt), ECT_REG_ALSTAT, sizeof(ec_alstatust), slstatlst + slcnt);
}
wkc = ecx_srconfirm(port, idx, timeout);
if (wkc >= 0)
{
for(slcnt = 0 ; slcnt < n ; slcnt++)
{
memcpy(slstatlst + slcnt, &(port->rxbuf[idx][sldatapos[slcnt]]), sizeof(ec_alstatust));
}
}
ecx_setbufstat(port, idx, EC_BUF_EMPTY);
return wkc;
}
/** Read all slave states in ec_slave.
* @warning The BOOT state is actually higher than INIT and PRE_OP (see state representation)
* @param[in] context = context struct
* @return lowest state found
*/
int ecx_readstate(ecx_contextt *context)
{
uint16 slave, fslave, lslave, configadr, lowest, rval, bitwisestate;
ec_alstatust sl[MAX_FPRD_MULTI];
uint16 slca[MAX_FPRD_MULTI];
boolean noerrorflag, allslavessamestate;
boolean allslavespresent = FALSE;
int wkc;
/* Try to establish the state of all slaves sending only one broadcast datagram.
* This way a number of datagrams equal to the number of slaves will be sent only if needed.*/
rval = 0;
wkc = ecx_BRD(context->port, 0, ECT_REG_ALSTAT, sizeof(rval), &rval, EC_TIMEOUTRET);
if(wkc >= *(context->slavecount))
{
allslavespresent = TRUE;
}
rval = etohs(rval);
bitwisestate = (rval & 0x0f);
if ((rval & EC_STATE_ERROR) == 0)
{
noerrorflag = TRUE;
context->slavelist[0].ALstatuscode = 0;
}
else
{
noerrorflag = FALSE;
}
switch (bitwisestate)
{
/* Note: BOOT State collides with PRE_OP | INIT and cannot be used here */
case EC_STATE_INIT:
case EC_STATE_PRE_OP:
case EC_STATE_SAFE_OP:
case EC_STATE_OPERATIONAL:
allslavessamestate = TRUE;
context->slavelist[0].state = bitwisestate;
break;
default:
allslavessamestate = FALSE;
break;
}
if (noerrorflag && allslavessamestate && allslavespresent)
{
/* No slave has toggled the error flag so the alstatuscode
* (even if different from 0) should be ignored and
* the slaves have reached the same state so the internal state
* can be updated without sending any datagram. */
for (slave = 1; slave <= *(context->slavecount); slave++)
{
context->slavelist[slave].ALstatuscode = 0x0000;
context->slavelist[slave].state = bitwisestate;
}
lowest = bitwisestate;
}
else
{
/* Not all slaves have the same state or at least one is in error so one datagram per slave
* is needed. */
context->slavelist[0].ALstatuscode = 0;
lowest = 0xff;
fslave = 1;
do
{
lslave = (uint16)*(context->slavecount);
if ((lslave - fslave) >= MAX_FPRD_MULTI)
{
lslave = fslave + MAX_FPRD_MULTI - 1;
}
for (slave = fslave; slave <= lslave; slave++)
{
const ec_alstatust zero = { 0, 0, 0 };
configadr = context->slavelist[slave].configadr;
slca[slave - fslave] = configadr;
sl[slave - fslave] = zero;
}
ecx_FPRD_multi(context, (lslave - fslave) + 1, &(slca[0]), &(sl[0]), EC_TIMEOUTRET3);
for (slave = fslave; slave <= lslave; slave++)
{
configadr = context->slavelist[slave].configadr;
rval = etohs(sl[slave - fslave].alstatus);
context->slavelist[slave].ALstatuscode = etohs(sl[slave - fslave].alstatuscode);
if ((rval & 0xf) < lowest)
{
lowest = (rval & 0xf);
}
context->slavelist[slave].state = rval;
context->slavelist[0].ALstatuscode |= context->slavelist[slave].ALstatuscode;
}
fslave = lslave + 1;
} while (lslave < *(context->slavecount));
context->slavelist[0].state = lowest;
}
return lowest;
}
/** Write slave state, if slave = 0 then write to all slaves.
* The function does not check if the actual state is changed.
* @param[in] context = context struct
* @param[in] slave = Slave number, 0 = master
* @return Workcounter or EC_NOFRAME
*/
int ecx_writestate(ecx_contextt *context, uint16 slave)
{
int ret;
uint16 configadr, slstate;
if (slave == 0)
{
slstate = htoes(context->slavelist[slave].state);
ret = ecx_BWR(context->port, 0, ECT_REG_ALCTL, sizeof(slstate),
&slstate, EC_TIMEOUTRET3);
}
else
{
configadr = context->slavelist[slave].configadr;
ret = ecx_FPWRw(context->port, configadr, ECT_REG_ALCTL,
htoes(context->slavelist[slave].state), EC_TIMEOUTRET3);
}
return ret;
}
/** Check actual slave state.
* This is a blocking function.
* To refresh the state of all slaves ecx_readstate() should be called
* @warning If this is used for slave 0 (=all slaves), the state of all slaves is read by an bitwise OR operation.
* The returned value is also the bitwise OR state of all slaves.
* This has some implications for the BOOT state. The Boot state representation collides with INIT | PRE_OP so this
* function cannot be used for slave = 0 and reqstate = EC_STATE_BOOT and also, if the returned state is BOOT, some
* slaves might actually be in INIT and PRE_OP and not in BOOT.
* @param[in] context = context struct
* @param[in] slave = Slave number, 0 = all slaves (only the "slavelist[0].state" is refreshed)
* @param[in] reqstate = Requested state
* @param[in] timeout = Timeout value in us
* @return Requested state, or found state after timeout.
*/
uint16 ecx_statecheck(ecx_contextt *context, uint16 slave, uint16 reqstate, int timeout)
{
uint16 configadr, state, rval;
ec_alstatust slstat;
osal_timert timer;
if ( slave > *(context->slavecount) )
{
return 0;
}
osal_timer_start(&timer, timeout);
configadr = context->slavelist[slave].configadr;
do
{
if (slave < 1)
{
rval = 0;
ecx_BRD(context->port, 0, ECT_REG_ALSTAT, sizeof(rval), &rval , EC_TIMEOUTRET);
rval = etohs(rval);
}
else
{
slstat.alstatus = 0;
slstat.alstatuscode = 0;
ecx_FPRD(context->port, configadr, ECT_REG_ALSTAT, sizeof(slstat), &slstat, EC_TIMEOUTRET);
rval = etohs(slstat.alstatus);
context->slavelist[slave].ALstatuscode = etohs(slstat.alstatuscode);
}
state = rval & 0x000f; /* read slave status */
if (state != reqstate)
{
osal_usleep(1000);
}
}
while ((state != reqstate) && (osal_timer_is_expired(&timer) == FALSE));
context->slavelist[slave].state = rval;
return state;
}
/** Get index of next mailbox counter value.
* Used for Mailbox Link Layer.
* @param[in] cnt = Mailbox counter value [0..7]
* @return next mailbox counter value
*/
uint8 ec_nextmbxcnt(uint8 cnt)
{
cnt++;
if (cnt > 7)
{
cnt = 1; /* wrap around to 1, not 0 */
}
return cnt;
}
/** Clear mailbox buffer.
* @param[out] Mbx = Mailbox buffer to clear
*/
void ec_clearmbx(ec_mbxbuft *Mbx)
{
memset(Mbx, 0x00, EC_MAXMBX);
}
/** Check if IN mailbox of slave is empty.
* @param[in] context = context struct
* @param[in] slave = Slave number
* @param[in] timeout = Timeout in us
* @return >0 is success
*/
int ecx_mbxempty(ecx_contextt *context, uint16 slave, int timeout)
{
uint16 configadr;
uint8 SMstat;
int wkc;
osal_timert timer;
osal_timer_start(&timer, timeout);
configadr = context->slavelist[slave].configadr;
do
{
SMstat = 0;
wkc = ecx_FPRD(context->port, configadr, ECT_REG_SM0STAT, sizeof(SMstat), &SMstat, EC_TIMEOUTRET);
SMstat = etohs(SMstat);
if (((SMstat & 0x08) != 0) && (timeout > EC_LOCALDELAY))
{
osal_usleep(EC_LOCALDELAY);
}
}
while (((wkc <= 0) || ((SMstat & 0x08) != 0)) && (osal_timer_is_expired(&timer) == FALSE));
if ((wkc > 0) && ((SMstat & 0x08) == 0))
{
return 1;
}
return 0;
}
/** Write IN mailbox to slave.
* @param[in] context = context struct
* @param[in] slave = Slave number
* @param[out] mbx = Mailbox data
* @param[in] timeout = Timeout in us
* @return Work counter (>0 is success)
*/
int ecx_mbxsend(ecx_contextt *context, uint16 slave,ec_mbxbuft *mbx, int timeout)
{
uint16 mbxwo,mbxl,configadr;
int wkc;
wkc = 0;
configadr = context->slavelist[slave].configadr;
mbxl = context->slavelist[slave].mbx_l;
if ((mbxl > 0) && (mbxl <= EC_MAXMBX))
{
if (ecx_mbxempty(context, slave, timeout))
{
mbxwo = context->slavelist[slave].mbx_wo;
/* write slave in mailbox */
wkc = ecx_FPWR(context->port, configadr, mbxwo, mbxl, mbx, EC_TIMEOUTRET3);
}
else
{
wkc = 0;
}
}
return wkc;
}
/** Read OUT mailbox from slave.
* Supports Mailbox Link Layer with repeat requests.
* @param[in] context = context struct