A problem with NI PCI-6602 under RTX - Gate 2

[egur]

Hi,

We are using NI PCI-6602 under RTX . Encoder counting mode: X4

We are using Incremental Shaft Encoder HENGSTLER RI 58-D/3600 AH 37RB

1. we are using it as RS422 +Alarm.
2. The encoder type is not a push pull type.
3. The Voltage supply is 5 Volt.
4. We have connected channel (A)+ to the channel A input of PCI-6602 and channel (B)+ to the channel B input of PCI-6602.

We have tested this card in two separate systems, and in both systems , we were able to read the counting for gates G0,G1,G3 but not for G2.

 The pinout is the following :
 Gate 0:

Channel_A(0)     -----> pin2
Channel_B(0)     -----> pin40

 Gate 1:

Channel_A(1)     -----> pin7
Channel_B(1)     -----> pin6

 Gate 2:
 
Channel_A(2)     -----> pin34      ------------------- Not working   
Channel_B(2)     -----> pin66
 
Gate 3:
 
Channel_A(3)     -----> pin31
Channel_B(3)     -----> pin63

Do you have any idea why this happens?

We used G0,G1,G2,G3 in kPCI_BAR1.

Is there a way to use G0,G1,G2,G3 in  kPCI_BAR0 ? 

How can it be done ?

Best Regards,

Efrat Gur

In the example Below we are referring to Gate 2 .

 --------------------------------------------------------------------------------------------------------------------------

#include "stdio.h"
#include "osiBus.h"
#include "tTIO.h"

tTIO *board;

int main()
{
 iBus* bus;

 tAddressSpace  Bar0;
 u32 physicalBar1;

 //Each PCI card has an identifying 32bit PCI ID number.
 //0x10930000 is the manufacturer ID number for all National Instruments cards
 //0x00001310 is the device ID number for the PCI-6602
 //0x00001360 is the device ID number for the PXI-6602
 //0x00002DB0 is the device ID number for the PCI-6608
 //0x00002CC0 is the device ID number for the PXI-6608

 bus = acquireBoard("PXI0::0::INSTR");

 if(bus == NULL){
  printf("Error accessing the PCI device.  Exiting.\n");
  return 1;
 }

  
 //Skip MITE initialization for PCMCIA boards
 //(which do not have a MITE DMA controller)
 if(!bus->get(kIsPciPxiBus,0)) return;
 
 Bar0 = bus->createAddressSpace(kPCI_BAR0);

 //Get the physical address of the DAQ board
 physicalBar1 = bus->get(kBusAddressPhysical,kPCI_BAR1);

/ ***** 6602/6608 specific MITE initialization *****
 // Hit the IO Window Base/Size Register 1 (IOWBSR1) in the MITE.  We set the 
 // address, enable the window and set the size of the window:
 Bar0.write32(0xC4, (physicalBar1 & 0xffffff00L) | 0x8C);

 // Write to the IO Window Control Register 1 (IOWCR1) to make the IO window 
 // go to RAM memory space instead of the config space
 Bar0.write32(0xF4, 0);
 
 // ***** End of 6602/6608 specific code *****

 bus->destroyAddressSpace(Bar0);

configDecoder(bus);
 releaseBoard(bus);
 return 0;
}

void configDecoder(iBus *bus)

{

 tAddressSpace  cardSpace;
  
 cardSpace = bus->createAddressSpace(kPCI_BAR1);
 board = new tTIO(cardSpace);

 //Reset
 board->G23_Joint_Reset_Register.writeG2_Reset(1);

 //Disarm
 board->G2_Command_Register.writeG2_Disarm(1);

 //load initial value of 0
 board->G2_Load_A_Registers.writeG2_Load_A(0x00000000);
 board->G2_Command_Register.writeG2_Load(1);

 //set the counting mode to quadrature encoding X4
 board->G2_Counting_Mode_Register.writeG2_Encoder_Counting_Mode(3);
 board->G2_Counting_Mode_Register.writeG2_Index_Phase(3);

 //set source to the internal timebase (20 MHz)
 board->G2_Input_Select_Register.writeG2_Source_Select(0);
 
 //set gate
 board->G2_Input_Select_Register.writeG2_Gate_Select(2);
 board->G2_Mode_Register.writeG2_Gate_Polarity(0);
 board->G2_Mode_Register.writeG2_Gating_Mode(2);
 board->G2_Mode_Register.writeG2_Trigger_Mode_For_Edge_Gate(3);
 
 //set counting direction to Gate IO connector
 board->G2_Command_Register.writeG2_Up_Down(2);

 //arm counter
 printf("counter value is 0x%08lx\n",
 board->G2_Save_Registers.readRegister());
 board->G2_Command_Register.writeG2_Arm(1);

}

Void readDecoder(){

Bool canRead = board->G23_Status_Register.readG2_Save_St();

If(canRead){

 counterValue1 = board->G2_Save_Registers.readRegister();
 counterValue2 = board->G2_Save_Registers.readRegister();
 if(counterValue1 != counterValue2)
  counterValue1 = board->G2_Save_Registers.readRegister();
 printf("counter value is now 0x%08lx\n",counterValue1);

 }

Best Regards,

Efrat Gur

[C0lin91]

Efrat,

Looks like you're using a slightly modified version of example 7 (gpct_ex7.cpp). Running example 7 on my machine, I was unable to reproduce your issue as I got non-zero counts for G0, G1, G2, and G3.

The only differences I see between your code and example 7 is that you moved the read code to its own function, removed the delay, and changed the code to use counter 2 instead of counter 0. Does your problem still occur when running example 7?