Experimental Physics and
Industrial Control System

"Prachi Chitnis" <[email protected]> · Thu, 23 Jul 2009 17:53:07 +0530 (IST)

Hello,
This mail is in reference to my previous mail. While I previously said
that GetWFC1.VAL is showing correct data, I saw some strange behavior. The
query to the scope (C1:WAVEFORM? DAT1) replies back integers (127 to -128)
which show relative positon of a point to x axis. Now whenever I get a y=0
point, all the values after that disappear in the GetWFC1.VAL array.
Follows my device support read_wf() function:

static long read_wf(pwf)
    struct waveformRecord *pwf;
{
        struct vmeio *pvmeio;
        char ip_address[50];
	int sockfd;
	char outbuf[MAX_O_ST];
	char inbuf[MAX_I_ST];

	sprintf(ip_address, OUR_SCOPE_IP);

	sockfd=LECROY_TCP_connect(ip_address, MAX_TCP_CONNECT);
	if (sockfd<0)
	{
		errlogPrintf("\nCould not connect to the scope on IP: %s\n",ip_address);

	}

	pwf->udf = FALSE;

	pvmeio = (struct vmeio *)&(pwf->inp.value);

	strcpy(outbuf,&(*(pvmeio->parm)));

	if(pvmeio->card)
	{LECROY_TCP_write(sockfd, outbuf);}

	if(pvmeio->signal)
	{LECROY_TCP_read(sockfd, inbuf, sizeof(inbuf), MAX_TCP_READ);}

	pwf->bptr = inbuf;

	pwf->nord = strlen(inbuf);

	LECROY_TCP_disconnect(sockfd);

     return(0);

}

Please help me out...
Thanx n regards
--
Prachi Chitnis
Scientific Officer 'C'
Raja Ramanna Centre for Advanced Technology,Indore
India

| Hello,
| My setup consists of a LeCroy scope that is interfaced to an Ubuntu 8.10
| machine on Ethernet.
| I could not use Asyn to communicate with this scope, so I wrote device
| support for it. My db file is as follows:
|
|
| record(waveform, GetWFC1) {
|   field(SCAN, "1 second")
|   field(PINI, "NO")
|   field(DTYP, "LeCroy WaveSurfer")
|   field(INP, "#C1 S1 @C1:WAVEFORM? DAT1\n")
|   field(NELM, "1000")
|   field(FTVL, "CHAR")
| }
|
| record(waveform, C1a) {
|   field(SCAN, "1 second")
|   field(PINI, "NO")
|   field(DTYP, "Soft Channel")
|   field(INP, "GetWFC1 CA")
|   field(NELM, "1000")
|   field(FTVL, "CHAR")
| }
|
| I am using the VME_IO for input link for "LeCroy Wavesurfer" device
| support. Card = (1,0) denotes (write, no write) to device, Signal = (1,0)
| denotes (read, no read) from the device and the parm denotes the command
| to be written to the device. The GetWFC1.VAL field is showing correct data
| & is updating properly.
|
| My problems are:
|
| 1)  When I keep C1a.INP as PP, I dont get any data into it.
|
| 2)  When I keep C1a.INP as CA (also CP), and monitor this record, I get
| the data into VAL field, the timestamp updates but the data doesn't
| update.
|
| 3)  When I morph C1a to subarray record, with same fields and MALM set to
| 1000, the the same prob as 2) occurs
|
| 4) I also set the PHAS fields of both records as 0 and 1(resp.), but that
| too didn't work.
|
| 5)  When I group these two records, then nor PP neither CA input link is
| able to fetch data into the VAL field of group:C1a record.
|
| 6)  I also tried to make the scan rate of C1a faster than GetWFC1, but
| that didn't help.
|
| Please suggest some solution.
| Thanx in advance...
|
| --
| Prachi Chitnis
| Scientific Officer 'C'
| Raja Ramanna Centre for Advanced Technology, Indore
| India
|

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System