Questions about the Multi-channel I/O Interrupt

["Weixing Cheng" <chengwx@ssrc.ac.cn>]

Hello, everyone. I have developed the acromagAVME9325 driver using I/O Intr
It's working well when one channel is used, no matter what's on other channels

 e.g.

record(ai, "$(user):aiAvme9325_Chan0")
{
 field(DESC, "Acromag AVME9325 Input")
 field(SCAN, "I/O Intr")
 field(DTYP, "acromagAVME")
 field(INP, "#C0 S0@")
 field(LINR, "LINEAR")
 field(EGUF, "10")
 field(EGUL, "-10")
 field(EGU, "Counts")
 field(HOPR, "10")
 field(LOPR, "-10")
 field(HIHI, "8")
 field(HIGH, "6")
 field(LOW, "4")
 field(LOLO, "2")
 field(HHSV, "MAJOR")
 field(HSV, "MINOR")
 field(LSV, "MINOR")
 field(LLSV, "MAJOR")
}

I tried to modify it with two channels like this:

record(ai, "$(user):aiAvme9325_Chan0")
{
 field(DESC, "Acromag AVME9325 Input")
 field(SCAN, "I/O Intr")
 field(DTYP, "acromagAVME")
 field(INP, "#C0 S0@")              /* channel 0 selected*/
 field(LINR, "LINEAR")
 field(EGUF, "10")
 field(EGUL, "-10")
 field(EGU, "Counts")
 field(HOPR, "10")
 field(LOPR, "-10")
 field(HIHI, "8")
 field(HIGH, "6")
 field(LOW, "4")
 field(LOLO, "2")
 field(HHSV, "MAJOR")
 field(HSV, "MINOR")
 field(LSV, "MINOR")
 field(LLSV, "MAJOR")
}

record(ai, "$(user):aiAvme9325_Chan1")
{
 field(DESC, "Acromag AVME9325 Input")
 field(SCAN, "I/O Intr")
 field(DTYP, "acromagAVME")
 field(INP, "#C0 S1@")           /* channel 1 selected*/
 field(LINR, "LINEAR")
 field(EGUF, "10")
 field(EGUL, "-10")
 field(EGU, "Counts")
 field(HOPR, "10")
 field(LOPR, "-10")
 field(HIHI, "8")
 field(HIGH, "6")
 field(LOW, "4")
 field(LOLO, "2")
 field(HHSV, "MAJOR")
 field(HSV, "MINOR")
 field(LSV, "MINOR")
 field(LLSV, "MAJOR")
}

This time I can't get the correct value of both channels, the two channels seems 
have the same value. the ai read routine is like this:

long avme9325DI_read(register volatile unsigned short card,register volatile unsigned short chan,long *pval)
{
 register volatile avme9325_t **p;
 register volatile avme9325_t *pcard;
 p=AVME9325.pCardList;
 pcard=AVME9325.vmeAddrs;
 *p=pcard;
 
 if(!pval) return 1;
 if(chan>15) return 1;
 
 pcard->scanProg=0x80|(0x1F&chan); /* channel select*/
 pcard->conversionCount=0x01;      /* conversion times*/
 
 while(!(pcard->csr&0x80))
  {
  ;
  } /*to determine whether the conversion finished*/

 *pval=(unsigned long)pcard->data[pcard->pData]>>4; /* read the AD value*/

 if(*pval==0xf000) return 1;
 else return 0;
}

I think there must be something wrong with the .db file, I have tried some ways such as add the PHAS field , or set the aiAvme9325_Chan1 to Passive scanning, but still doesn't work.

Any suggestion is appreciated. Thank you

Cheng Weixing from SSRF