/** Blocking send and recieve frame function. Used for non processdata frames.
* A datagram is build into a frame and transmitted via this function. It waits
* for an answer and returns the workcounter. The function retries if time is
* left and the result is WKC=0 or no frame received.
*
* The function calls ec_outframe_red() and ec_waitinframe_red().
*
* @param[in] port = port context struct
* @param[in] idx = index of frame
* @param[in] timeout = timeout in us
* @return Workcounter or EC_NOFRAME
*/
int ecx_srconfirm(ecx_portt *port, int idx, int timeout)
{
int wkc = EC_NOFRAME;
osal_timert timer;
osal_timer_start(&timer, timeout);
do
{
osal_timert read_timer;
/* tx frame on primary and if in redundant mode a dummy on secondary */
ecx_outframe_red(port, idx);
osal_timer_start(&read_timer, MIN(timeout, EC_TIMEOUTRET));
/* get frame from primary or if in redundant mode possibly from secondary */
wkc = ecx_waitinframe_red(port, idx, read_timer);
/* wait for answer with WKC>0 or otherwise retry until timeout */
} while ((wkc <= EC_NOFRAME) && (osal_timer_is_expired(&timer) == FALSE));
/* if nothing received, clear buffer index status so it can be used again */
if (wkc <= EC_NOFRAME)
{
ecx_setbufstat(port, idx, EC_BUF_EMPTY);
}
return wkc;
}
/** Blocking send and recieve frame function. Used for non processdata frames.
* A datagram is build into a frame and transmitted via this function. It waits
* for an answer and returns the workcounter. The function retries if time is
* left and the result is WKC=0 or no frame received.
*
* The function calls ec_outframe_red() and ec_waitinframe_red().
*
* @param[in] port = port context struct
* @param[in] idx = index of frame
* @param[in] timeout = timeout in us
* @return Workcounter or EC_NOFRAME
*/
int ecx_srconfirm(ecx_portt *port, int idx, int timeout)
{
int wkc = EC_NOFRAME;
osal_timert timer1, timer2;
osal_timer_start (&timer1, timeout);
do
{
/* tx frame on primary and if in redundant mode a dummy on secondary */
ecx_outframe_red(port, idx);
if (timeout < EC_TIMEOUTRET)
{
osal_timer_start (&timer2, timeout);
}
else
{
/* normally use partial timout for rx */
osal_timer_start (&timer2, EC_TIMEOUTRET);
}
/* get frame from primary or if in redundant mode possibly from secondary */
wkc = ecx_waitinframe_red(port, idx, &timer2);
/* wait for answer with WKC>=0 or otherwise retry until timeout */
} while ((wkc <= EC_NOFRAME) && !osal_timer_is_expired (&timer1));
/* if nothing received, clear buffer index status so it can be used again */
if (wkc <= EC_NOFRAME)
{
ecx_setbufstat(port, idx, EC_BUF_EMPTY);
}
return wkc;
}
/** Blocking receive frame function. Calls ec_waitinframe_red().
* @param[in] port = port context struct
* @param[in] idx = requested index of frame
* @param[in] timeout = timeout in us
* @return Workcounter if a frame is found with corresponding index, otherwise
* EC_NOFRAME.
*/
int ecx_waitinframe(ecx_portt *port, int idx, int timeout)
{
int wkc;
osal_timert timer;
osal_timer_start (&timer, timeout);
wkc = ecx_waitinframe_red(port, idx, timer);
/* if nothing received, clear buffer index status so it can be used again */
if (wkc <= EC_NOFRAME)
{
ecx_setbufstat(port, idx, EC_BUF_EMPTY);
}
return wkc;
}
void ec_setbufstat(int idx, int bufstat)
{
ecx_setbufstat(&ecx_port, idx, bufstat);
}